Today&#8217;s Image of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features the barred spiral galaxy Messier 91 (M91), which is located about 55 million light-years from Earth in the <a href="https://www.earth.com/image/spiral-galaxy-in-the-constellation-fornax/">constellation</a> Coma Berenices.



According to NASA, M91 is one of over 1,000 galaxies that make up the Virgo cluster, a group of galaxies that are gravitationally bound to one. The photo was captured by the Wide Field Camera 3 on the NASA/ESA Hubble Space Telescope.&nbsp;



&#8220;While M91’s prominent bar makes for a spectacular galactic portrait, it also hides an astronomical monstrosity,&#8221; reports ESA. &#8220;Like our own galaxy, M91 contains a supermassive black hole at its centre. A 2009 study using archival Hubble data found that this central black hole weighs somewhere between 9.6 and 38 million times as much as the Sun.&#8221;



Using data from the archives, astronomers could weigh M91’s central black hole. But ESA explains that the latest observation is part of an effort to build a treasure trove of astronomical data exploring the connections between young stars and the clouds of cold gas in which they form.&nbsp;



Image Credit: ESA



&#8211;&#8212;



By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Spiral galaxy M91 in the constellation Coma Berenices

Today's Image of the Day from NASA Earth Observatory features a satellite view of retreating glaciers in Alaska, where meltwater is rapidly expanding glacial lakes. The image was captured on August 4, 2024 by the Landsat 8 satellite.



“In parts of Alaska, water is replacing ice. As glaciers thin and <a href="https://www.earth.com/news/satellite-images-reveal-hidden-retreat-of-arctic-glaciers/" target="_blank" rel="noreferrer noopener">retreat</a>, meltwater collects at their fronts, forming proglacial lakes. According to an analysis by Mauri Pelto, a glaciologist at Nichols College, three such lakes in the southeastern part of the state have grown rapidly in recent decades,” said <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA</a>.



<h2 class="wp-block-heading" id="h-retreating-glaciers-in-alaska">Retreating glaciers in Alaska</h2>



“A trio of glaciers - Yakutat, Alsek, and Grand Plateau - descend from inland mountains and flow onto the coastal plain southeast of Yakutat borough, ending at Harlequin Lake, Alsek Lake, and Grand Plateau Lake,” noted NASA.&nbsp;



The retreat of the glaciers, as well as the growth of the lakes, are visible in the image. When compared to an <a href="https://eoimages.gsfc.nasa.gov/images/imagerecords/153000/153638/fastestlake_tm5_19840705_lrg.jpg" target="_blank" rel="noreferrer noopener">image</a> captured by Landsat 5 in the summer of 1984, the changes are even more evident.



NASA elaborated on the extent of the glacier retreat from 1984 to 2024. “During this period, Yakutat Glacier’s main arm retreated 4.3 miles, while Alsek Glacier’s northern and southern arms retreated 3.3 miles and 3.4 miles, respectively. Grand Plateau Glacier’s northern arm lost the most, retreating 4.8 miles.”



<h2 class="wp-block-heading" id="h-glacial-lakes-doubled-in-size-nbsp">Glacial lakes doubled in size&nbsp;</h2>



“Collectively, the three lakes more than doubled in size over 40 years. In 1984, they covered about 50 square miles. By 2024, they spanned 90 square miles. That’s an area larger than Seneca Lake (67 square miles) - one of the Finger Lakes in New York, which also have a glacial origin,” said NASA.



Pelto noted that the lakes forming in this region are immense - starting at the mountains and spreading toward the coast - making this a new lake district that is unique in our nation.



“Millions of other lakes, named and unnamed, dot the state. But this system has grown fast, so much so that Pelto thinks it might represent the fastest lake growth in the United States this century,” said NASA.



<h2 class="wp-block-heading" id="h-understanding-glacier-retreat-nbsp">Understanding glacier retreat&nbsp;</h2>



Glacier retreat is a significant phenomenon driven primarily by global warming the results from rising greenhouse gas <a href="https://www.earth.com/news/global-carbon-dioxide-emissions-hit-a-record-high-in-2023/" target="_blank" rel="noreferrer noopener">emissions</a>. 



As temperatures rise, glaciers lose more ice during the summer melt than they can regain in winter snowfall, causing them to shrink over time. This process has profound implications for ecosystems, water resources, and global sea levels.



<h3 class="wp-block-heading" id="h-glacial-lakes">Glacial lakes</h3>



When glaciers retreat, they often leave behind depressions in the landscape that can fill with meltwater, forming glacial lakes. These lakes are typically bounded by natural dams made of rock, ice, or moraine - accumulations of debris left behind by the glacier's movement.&nbsp;



Over the past century, the number and size of glacial lakes worldwide have increased significantly due to the accelerating pace of <a href="https://www.earth.com/news/tropical-glaciers-offer-a-glimpse-of-our-harsh-climate-reality/" target="_blank" rel="noreferrer noopener">glacier</a> retreat. This trend is especially evident in high-altitude regions like the Himalayas, the Andes, and the Alps, as well as in polar areas such as Alaska and Greenland.



<h3 class="wp-block-heading" id="h-positive-and-negative-impacts-nbsp">Positive and negative impacts&nbsp;</h3>



Glacial lakes can have both positive and negative impacts. They provide critical water sources for downstream communities, support biodiversity, and sometimes offer opportunities for hydropower development or tourism.&nbsp;



However, they also pose serious risks. The dams holding back these lakes can fail suddenly, causing glacial lake outburst floods (GLOFs). These catastrophic events can devastate downstream areas, destroying infrastructure, agricultural lands, and habitats while endangering human lives.



<h3 class="wp-block-heading" id="h-monitoring-changes">Monitoring changes</h3>



Understanding glacier retreat and glacial lake formation requires a multidisciplinary approach, combining climate science, hydrology, and geology.&nbsp;



Monitoring these changes is essential to mitigate associated risks and adapt to the evolving landscape shaped by a <a href="https://search.app?link=https%3A%2F%2Fwww.earth.com%2Fnews%2Fperu-has-lost-over-half-of-its-glaciers-in-six-decades%2F&amp;utm_campaign=aga&amp;utm_source=agsadl2%2Csh%2Fx%2Fgs%2Fm2%2F4" target="_blank" rel="noreferrer noopener">warming planet</a>.



<h2 class="wp-block-heading" id="h-glacier-retreat-worldwide">Glacier retreat worldwide</h2>



Studies and satellite observations show that most glaciers in almost all regions of the world are shrinking.&nbsp;



Melting glaciers contribute significantly to global <a href="https://www.earth.com/news/emergency-meeting-reveals-the-alarming-extent-of-antarcticas-ice-loss/" target="_blank" rel="noreferrer noopener">sea level rise</a>, which threatens coastal communities and ecosystems.



The retreat of glaciers is considered one of the clearest indicators of climate change. Some glaciers are retreating at unprecedented rates, indicating accelerating climate impacts.



Image Credit: NASA Earth Observatory



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Retreating glaciers and expanding meltwater lakes in Alaska

Today's Image of the Day from NASA Earth Observatory features...

Today's Image of the Day from the European Space Agency features the star-forming region NGC 604, which is located 2.73 million light-years away from Earth in the Triangulum Galaxy (M33). The image was captured by the James Webb Space Telescope.



By studying regions like NGC 604, astronomers can gain insights into the complex interactions between stars and the interstellar medium, as well as the conditions that lead to the birth of stars. This, in turn, helps in understanding the evolution of <a href="https://www.earth.com/news/galaxies-like-our-own-milky-way-are-not-unique/" target="_blank" rel="noreferrer noopener">galaxies</a> and the universe as a whole.



<h2 class="wp-block-heading" id="h-massive-stars-of-ngc-604">Massive stars of NGC 604</h2>



"Sheltered among NGC 604’s dusty envelopes of gas are more than 200 of the hottest, most massive kinds of stars, all in the early stages of their lives," said <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">ESA</a>.



"These types of stars are known as B-types and O-types, the latter of which can be more than 100 times the mass of our own Sun. It’s quite rare to find this concentration of them in the nearby universe. In fact, there’s no similar region within our own Milky Way galaxy."



According to ESA, this concentration of massive stars, combined with its relatively close distance, means NGC 604 gives astronomers an opportunity to study these objects at a fascinating time early in their life.



<h2 class="wp-block-heading" id="h-gigantic-region-of-ionized-hydrogen">Gigantic region of ionized hydrogen</h2>



NGC 604 is one of the largest known regions of ionized hydrogen, also known as an H II region. This nebula is significantly larger than the Orion Nebula, which is one of the most well-known H II regions in our own <a href="https://www.earth.com/news/large-amount-of-dark-matter-may-be-missing-from-the-milky-way/" target="_blank" rel="noreferrer noopener">Milky Way galaxy</a>.&nbsp;



NGC 604 spans about 1,500 light-years across, making it one of the largest H II regions in the Local Group of galaxies. This group includes the Milky Way, the Andromeda Galaxy, and about 54 other smaller galaxies. 



<h2 class="wp-block-heading" id="h-ngc-604-starburst-phenomenon">NGC 604 starburst phenomenon </h2>



Within NGC 604, there are hundreds of young, hot, massive <a href="https://www.earth.com/news/stars-at-the-edge-of-our-milky-way-galaxy-travel-more-slowly/" target="_blank" rel="noreferrer noopener">stars</a>. These stars have ionized the surrounding gas, causing it to glow and creating the nebula. The region is a prime example of a starburst phenomenon, where stars form at a much higher rate than in typical galactic conditions.



“The bright orange streaks in this image signify the presence of carbon-based molecules known as polycyclic aromatic hydrocarbons, or PAHs," explained ESA.



"As you travel further from the immediate cavities of dust where the star is forming, the deeper red signifies molecular hydrogen. This cooler gas is a prime environment for star formation. Ionized hydrogen from ultraviolet radiation appears as a white and blue ghostly glow."



<h2 class="wp-block-heading" id="h-more-about-star-formation">More about star formation </h2>



Star formation is crucial for the evolution of galaxies and the synthesis of heavy elements. In the cores of stars, elements heavier than helium are created.



The elements are spread throughout the <a href="https://www.earth.com/news/ancient-stars-shakti-shiva-shaped-milky-way-galaxy/" target="_blank" rel="noreferrer noopener">galaxy</a> when stars reach the end of their lives and expel their material - either gently through winds or violently via supernova explosions. This enriching process allows for the formation of new stars and planets, and ultimately, the potential for life.



<h3 class="wp-block-heading">Cloud collapse</h3>



The process begins when part of a molecular cloud becomes unstable and starts to collapse under its own gravity. This can be triggered by events like shock waves from nearby <a href="https://www.earth.com/news/supernova-explosions-could-damage-distant-planets/" target="_blank" rel="noreferrer noopener">supernovae</a>, galactic collisions, or the influence of other massive stars.



<h3 class="wp-block-heading">Formation of a protostar</h3>



As the cloud collapses, it fragments into smaller clumps. Each clump will eventually form one or more stars. 



The material within these clumps continues to fall inward, heating up as it does so, eventually forming a warm core called a protostar. At this stage, the protostar is not yet hot enough for nuclear fusion (the process that powers stars) to occur.



<h3 class="wp-block-heading">Accretion disk</h3>



Around the protostar, material from the surrounding cloud continues to fall inward, forming a rotating disk. This material slowly accretes onto the protostar, increasing its mass.



<h3 class="wp-block-heading">Nuclear fusion begins</h3>



Once the core of the protostar reaches a high enough temperature and pressure, hydrogen atoms begin to fuse into helium, releasing energy in the process. This marks the transition from a protostar to a main sequence star, like our sun.



<h3 class="wp-block-heading">Main sequence and beyond</h3>



The star will spend the majority of its life in the main sequence stage, where it balances the gravitational forces trying to collapse it and the outward pressure from nuclear fusion. 



Eventually, the star will exhaust its hydrogen fuel. Its subsequent evolution will depend on its initial mass, leading to various end stages such as red giants, supernovae, neutron stars, or black holes.



Image Credit: NASA/ESA/CSA James Webb Space Telescope



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Young, massive stars in the Triangulum Galaxy

Today's Image of the Day from the European Space Agency...

Today's Image of the Day from NASA Earth Observatory features the Messak Settafet, a rocky plateau located in the central Sahara Desert. It is part of the greater Messak Plateau, which stretches between the Erg Uan Kasa and the Murzuq Sand Sea.&nbsp;



The plateau's surface is characterized by blackened sandstone, sculpted by thousands of years of wind erosion. This dark patina, often referred to as "desert varnish," adds to its distinctive appearance. The region is starkly beautiful but harsh, with extreme temperatures and minimal <a href="https://www.earth.com/news/even-desert-plants-are-not-immune-to-climate-stress/" target="_blank" rel="noreferrer noopener">vegetation</a>.



<h2 class="wp-block-heading" id="h-image-of-the-messak-settafet">Image of the Messak Settafet</h2>



“Towering over the desert in southwestern Libya, the Messak Settafet plateau resembles the wall of a giant fortress, with its dark, erosion-resistant sandstone separating the Ubari Sand Sea to the north and the Marzūq Sand Sea to the south,” noted NASA.



“The large outcrop of Cretaceous rock features a sharp escarpment on its north side. The cliff, some 300 meters (1,000 feet) high in places, is lined with a thin dark shadow.”&nbsp;



“Dark debris from rockfalls is visible to the north. Note that an optical illusion called relief inversion can make high-elevation areas appear low and vice versa when shadows appear on the northern side of a feature.”



Archaeological significance of the plateau&nbsp;



Messak Settafet is often referred to as the "land of stone tools" because it is one of the world's largest sites for prehistoric tools.&nbsp;



The area is littered with countless <a href="https://search.app?link=https%3A%2F%2Fwww.earth.com%2Fnews%2Fstone-tool-discovery-challenges-entire-theory-of-human-evolution%2F&amp;utm_campaign=aga&amp;utm_source=agsadl2%2Csh%2Fx%2Fgs%2Fm2%2F4" target="_blank" rel="noreferrer noopener">stone tools</a> and artifacts dating back to various prehistoric periods, including the Acheulean and Neolithic. These tools offer insights into early human technology and adaptation to desert environments.



“Signs of ancient tool making cover much of the plateau’s surface,” said <a href="https://www.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA</a>. “According to one archaeological survey, people discarded so many stone tools and rock fragments on the plateau over hundreds of thousands of years that roughly 75 artifacts per square meter now carpet the surface.” 



“That makes this one of the earliest known examples of hominins modifying an entire landscape, according to the University of Cambridge archaeologists who conducted the survey.”



“Other signs of ancient activity include the bright spots that dot the image. These areas were likely quarrying pits where people dug up rocks and crafted them into tools, the archaeologists reported.”&nbsp;



<h2 class="wp-block-heading" id="h-rock-art-on-the-plateau-nbsp">Rock art on the plateau&nbsp;</h2>



The plateau is home to numerous petroglyphs and <a href="https://www.earth.com/news/negev-petroglyphs-ancient-art-rock-carvings-face-erosion-fungi-lichens/" target="_blank" rel="noreferrer noopener">carvings</a>. These engravings depict animals, humans, and symbolic designs, providing valuable clues about the lives, beliefs, and environments of the region's ancient inhabitants. 



“For instance, Wadi Mathendous, a prehistoric archaeological site located in the southern part of the plateau, contains engravings of rhinoceroses, crocodiles, hippopotamuses, fighting cats, giraffes, long-horned buffaloes, and elephants. The art is thought to be about 8,000 years old,” said NASA.



Some of the animals depicted, such as giraffes and elephants, indicate that the Sahara was once a <a href="https://search.app?link=https%3A%2F%2Fwww.earth.com%2Fnews%2Fa-lush-green-sahara-desert-helped-early-humans-migrate-out-of-africa%2F&amp;utm_campaign=aga&amp;utm_source=agsadl2%2Csh%2Fx%2Fgs%2Fm2%2F4" target="_blank" rel="noreferrer noopener">much wetter</a> and more hospitable environment.



Cultural significance of the Messak Settafet



Messak Settafet forms part of the Rock-Art Sites of Tadrart Acacus, a UNESCO World Heritage Site since 1985. This designation highlights the area's importance for understanding early human culture and environmental changes in the Sahara.



The plateau has been a critical area for studying the migration and adaptation of early humans. Its archaeological richness offers a glimpse into how humans thrived in this region during periods when the climate was wetter.



“Although the plateau now receives less than 0.4 inches of rain annually, clues in the landscape make clear it was once much wetter,” noted NASA.



“Deeply incised dried stream valleys, or wadis, crisscross the plateau, indicating significant past water flow. The small, bright features scattered across the plateau are sand and silt deposits left where water once pooled.”



The Messak Settafet, like many remote <a href="https://www.earth.com/news/sahara-desert-dust-storms-carry-harmful-bacteria-and-fungi-around-the-globe/" target="_blank" rel="noreferrer noopener">desert</a> regions, faces challenges such as erosion, vandalism of ancient rock art, and the potential impacts of development. Efforts to preserve its archaeological treasures are vital for protecting its cultural and scientific significance.



The image was captured November 17, 2024 by the Operational Land Imager-2 (OLI-2) on Landsat 9 on&nbsp;



Image Credit: NASA Earth Observatory



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Messak Settafet plateau in the Sahara Desert

Today's Image of the Day from the European Space Agency features the western part of Grand Bahama, the northernmost island in the Bahamas, captured by the Copernicus Sentinel-2 satellite system.&nbsp;



Grand Bahama is known for its beautiful beaches, clear turquoise waters, and vibrant tourism industry. The island is the fourth largest in the Bahamas and is one of the most popular tourist destinations in the region.



<h2 class="wp-block-heading" id="h-main-cities-of-grand-bahama-nbsp">Main cities of Grand Bahama&nbsp;</h2>



“Grand Bahama’s two main cities are both visible in the image: West End on the northwestern tip of the island and Freeport on the southern shore,” noted <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">ESA</a>.



“West End is the oldest city on the island, and the capital. The runway of West End airport, the smaller of the two airports serving Grand Bahama, can be spotted west of the city.”



Freeport serves as a hub for tourism, trade, and commerce. It was developed as a free trade zone in the 1950s, which has helped drive its growth.



<h2 class="wp-block-heading" id="h-geography-and-climate">Geography and climate</h2>



Grand Bahama is situated about 55 miles off the coast of Florida, making it one of the closest islands in the Bahamas to the United States.



The island has a tropical climate, with warm <a href="https://www.earth.com/news/global-temperatures-increase-scientists-plan-slow-down-rising-heat/" target="_blank" rel="noreferrer noopener">temperatures</a> year-round. It experiences a wet season from May to October and a dry season from November to April.



The rainy season is from May to October, with the wettest months being August and September. Thunderstorms are common during this period, and the island can experience heavy rainfall, especially during hurricane season.



The humidity level is consistently high due to the tropical location, often exceeding 70 percent. It peaks during the rainy season, making it feel <a href="https://www.earth.com/news/what-temperature-threshold-can-the-human-body-handle/" target="_blank" rel="noreferrer noopener">hotter</a> than the actual temperature.



<h2 class="wp-block-heading" id="h-hurricanes-on-grand-bahama">Hurricanes on Grand Bahama</h2>



<a href="https://www.earth.com/news/scientists-propose-adding-a-category-6-to-the-current-hurricane-intensity-scale/" target="_blank" rel="noreferrer noopener">Hurricanes</a> have left a lasting impact on the infrastructure, economy, and environment of Grand Bahama.&nbsp;



Recovery efforts from such destructive storms often take years, and the island's experience with hurricanes has highlighted the vulnerability of coastal communities in the face of increasingly severe weather events.



Dorian was one of the most devastating hurricanes to hit Grand Bahama. It was a Category 5 storm with maximum sustained winds of 185 miles per hour.&nbsp;



The hurricane caused catastrophic damage, including widespread flooding, destruction of homes and infrastructure, and loss of life. Dorian stalled over the island, leading to prolonged and intense damage.



<h2 class="wp-block-heading" id="h-tourism-nbsp-on-grand-bahama">Tourism&nbsp;on Grand Bahama</h2>



Grand Bahama is known for its stunning beaches, such as Lucaya Beach, Xanadu Beach, and Taino Beach. The island offers various water activities, including snorkeling, scuba diving, and boating.



The Lucayan National Park is a popular natural attraction, featuring one of the world's longest underwater cave systems, as well as beautiful <a href="https://www.earth.com/news/mangroves-and-saltmarshes-are-much-better-at-storing-carbon-than-previously-believed/" target="_blank" rel="noreferrer noopener">mangroves</a> and wetlands.



Port Lucaya Marketplace is a vibrant area with shops, restaurants, and entertainment, often considered the heart of Grand Bahama’s tourist activity.



Grand Bahama has been working on revitalizing its tourism industry, especially after facing challenges like hurricanes and the Covid-19 pandemic. Efforts include upgrading infrastructure, improving facilities, and promoting sustainable tourism practices. 



The island offers various <a href="https://www.earth.com/news/travelers-are-ready-for-more-affordable-eco-friendly-options/" target="_blank" rel="noreferrer noopener">eco-tourism</a> activities, including kayaking through mangroves, bird watching, and exploring its unique ecosystems, which attract visitors interested in environmental conservation and sustainable travel.



<h2 class="wp-block-heading" id="h-grand-bahama-folklore">Grand Bahama folklore</h2>



On Grand Bahama Island, folklore and supernatural tales have been passed down through generations.



<h3 class="wp-block-heading" id="h-the-chickcharney">The Chickcharney</h3>



The Chickcharney is a legendary creature believed to inhabit the forests of the Bahamas, including Grand Bahama. Described as a large, bird-like creature with red eyes and three-toed feet, it is said to bring good luck to those who encounter it and treat it with respect.&nbsp;



However, those who mock or disrespect it might find themselves cursed with bad luck. The Chickcharney is deeply rooted in Bahamian folklore and is often depicted as a guardian of the forests.



<h3 class="wp-block-heading" id="h-the-ghost-of-rand-nature-center">The ghost of Rand Nature Center</h3>



The Rand Nature Center in Freeport is rumored to be haunted by the ghost of a former caretaker. Visitors and staff have reported strange occurrences, such as unexplained footsteps, cold spots, and the feeling of being watched.&nbsp;



Some believe the caretaker's spirit lingers to ensure the park is well-maintained and respected by those who visit.



<h3 class="wp-block-heading" id="h-the-lost-city-of-atlantis">The lost city of Atlantis</h3>



While not unique to Grand Bahama, the legend of Atlantis has a connection to the Bahamas. Some believe that parts of the lost city lie submerged off the coast of the island.&nbsp;



There are tales of divers encountering mysterious underwater structures and strange phenomena, leading to speculation that these ruins could be remnants of the ancient civilization.



These stories are an integral part of the island's cultural heritage, blending history, myth, and the supernatural. Whether one believes in the supernatural or not, the tales continue to capture the imagination of both locals and visitors to Grand Bahama.



Image Credit: Copernicus Sentinel data (2023), processed by ESA



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Grand Bahama: A blend of beauty and resilience 

Today's Image of the Day from NASA Earth Observatory features an astronaut view of the Aladaghlar Mountains in northwestern Iran.



These <a href="https://www.earth.com/news/how-and-why-do-mountains-form-new-theories-for-an-age-old-mystery/" target="_blank" rel="noreferrer noopener">mountains</a> are known for their strikingly colorful landscapes, which make them stand out among other mountain ranges.



<h2 class="wp-block-heading" id="h-landscape-of-the-aladaghlar-mountains">Landscape of the Aladaghlar Mountains</h2>



"Ridges cast shadows in the valleys and other low elevation areas, creating a three-dimensional appearance. Human alterations to the landscape are most evident in riverbeds, where the even topography is easier to build on and navigate," said <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA</a>.



"Natural processes over millions of years have folded rock layers of various compositions and colors into the curved patterns seen here. These folds are produced by tectonic forces operating along the convergent plate boundary of the Arabia and Eurasia plates." 



<h2 class="wp-block-heading" id="h-the-rainbow-mountains">The Rainbow Mountains</h2>



One of the most remarkable features of the Aladaghlar Mountains is the vivid coloration of their slopes. 



The name "Aladaghlar" translates to "colorful mountains," which is a testament to their unique appearance.&nbsp;They are also known as the Rainbow Mountains.



<h2 class="wp-block-heading" id="h-wildlife-of-the-aladaghlar-mountains">Wildlife of the Aladaghlar Mountains </h2>



The Aladaghlar Mountains are part of a larger <a href="https://www.earth.com/news/mountain-ecosystems-are-in-urgent-need-of-protection/" target="_blank" rel="noreferrer noopener">ecosystem</a> that includes forests, meadows, and rivers, contributing to a rich biodiversity. 



The region supports a variety of wildlife, including several species that are unique to the area. The diverse wildlife add to the natural beauty and ecological importance of these <a href="https://www.earth.com/news/how-and-why-do-mountains-form-new-theories-for-an-age-old-mystery/" target="_blank" rel="noreferrer noopener">mountains</a>.



Among the larger mammals, the mountains host species such as brown bears, Persian leopards, and wild goats. The Aladaghlar Mountains also support smaller mammals, including foxes, hares, and various rodent species.&nbsp;



<a href="https://www.earth.com/news/how-mountains-influence-bird-evolution/" target="_blank" rel="noreferrer noopener">Birdlife</a> is abundant, including eagles, falcons, and a variety of songbirds. Reptiles like lizards and snakes are commonly found in the more humid areas, as well as amphibians.&nbsp;



<h2 class="wp-block-heading" id="h-cultural-significance-of-the-region">Cultural significance of the region</h2>



In addition to their natural appeal, the Aladaghlar Mountains hold cultural significance. The region has a rich history, with evidence of ancient civilizations and historical sites. 



Local communities have their unique cultures and traditions, which have been influenced by the natural environment of the mountains.



<h2 class="wp-block-heading" id="h-geology-of-the-aladaghlar-mountains-nbsp">Geology of the Aladaghlar Mountains&nbsp;</h2>



The geological history of these <a href="https://www.earth.com/news/mountains-both-carbon-sinks-and-carbon-sources/" target="_blank" rel="noreferrer noopener">mountains</a> is a fascinating tale of millions of years of natural processes.



The Aladaghlar Mountains are primarily composed of sedimentary rocks that have accumulated over millions of years. These sediments include sandstones, siltstones, shales, and conglomerates.



<h3 class="wp-block-heading" id="h-mineral-deposition-nbsp">Mineral deposition&nbsp;</h3>



The varying colors of the Aladaghlar Mountains are largely due to the presence of different minerals in the sedimentary layers. For example, red and orange hues are typically due to iron oxides, while greens can result from copper compounds.



These minerals were deposited in the sedimentary rocks through processes such as chemical precipitation, biological activity, and the weathering of parent rocks.



<h3 class="wp-block-heading" id="h-tectonic-activity">Tectonic activity</h3>



The region has experienced significant tectonic activity due to its location near the convergent boundary between the Arabian and Eurasian plates. This tectonic activity has caused the uplift and folding of the sedimentary layers, creating the mountain range.



The compression and folding associated with tectonic movements have also contributed to the exposure of the colorful strata that were originally deposited horizontally.



<h3 class="wp-block-heading" id="h-erosion-and-weathering">Erosion and weathering</h3>



Over time, erosion and weathering processes have played a crucial role in shaping the Aladaghlar Mountains. 



Wind, water, and temperature variations have eroded the softer rock layers more quickly than the harder ones, creating the distinctive ridges and valleys seen today.



These erosive processes have also helped to expose the underlying layers, revealing the vibrant colors and intricate patterns that attract tourists and geologists alike.



<h2 class="wp-block-heading">Tales and legends</h2>



One of the most famous tales associated with the Aladaghlar Mountains is that of a hidden treasure buried deep within the mountains by an ancient Persian king.&nbsp;



According to legend, the treasure is guarded by mystical creatures and can only be found by someone pure of heart and brave enough to face the challenges of the mountain.



<h3 class="wp-block-heading">The shepherd and the fairy</h3>



Another local legend tells the story of a young shepherd who fell in love with a fairy he encountered in the Aladaghlar Mountains. The fairy granted the shepherd three wishes, but warned him that the wishes would come with consequences.&nbsp;



Despite the warning, the shepherd made his wishes, which ultimately led to his downfall, serving as a cautionary tale about the dangers of greed.



<h3 class="wp-block-heading">The healing springs</h3>



The Aladaghlar Mountains are also said to be home to a spring with magical healing properties. According to folklore, those who bathe in the spring or drink its water are cured of all ailments.&nbsp;



However, the location of the spring is a closely guarded secret, known only to a few wise elders in the nearby villages.



<h3 class="wp-block-heading">The spirit of the mountain&nbsp;</h3>



Some locals believe that the Aladaghlar Mountains are inhabited by a protective spirit, who watches over the land and its people.&nbsp;



This spirit is said to bring good fortune to those who respect the mountain and its natural beauty, but misfortune to those who exploit or harm it.



Image Credit: NASA Earth Observatory&nbsp;



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The Aladaghlar Mountains of northwestern Iran

Today's Image of the Day from NASA Earth Observatory features the Corbassière glacier, a high-altitude glacier in Switzerland. The glacier originates on the northern slope of the Grand Combin, which is one of the highest peaks in the Pennine Alps.



Collectively, the <a href="https://www.earth.com/news/alpine-glaciers-will-lose-half-of-their-volume-by-2050/" target="_blank" rel="noreferrer noopener">alpine glaciers</a> of Switzerland have lost more than half of their volume since the 1930s.



<h2 class="wp-block-heading" id="h-natural-archives-of-past-climate">Natural archives of past climate </h2>



"Glaciers are natural archives of past climate. In their frozen layers lies evidence of Earth’s changing temperature and atmospheric composition. But as the climate warms, some of the longest records of our changing planet are melting away," said <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA</a>.



"In just over two decades, Corbassière has shrunk in area and surface mass. The glacier was darker in 2023 due to lack of snow, and the glacier’s tongue had retreated."



<h2 class="wp-block-heading" id="h-ice-cores-from-the-corbassiere-glacier">Ice cores from the Corbassière glacier</h2>



To reconstruct past concentrations of atmospheric <a href="https://www.earth.com/news/how-do-aerosols-impact-the-climate/" target="_blank" rel="noreferrer noopener">aerosols</a>, a team of scientists analyzed ice cores that were collected from the Corbassière glacier in 2018 and 2020.&nbsp;



Aerosols are tiny airborne particles that are deposited in the ice. "Such information from glaciers around the world can provide clues about past environmental conditions thousands of years ago," noted NASA.



"Ice cores contain ammonium, nitrate, and sulfate ions - signatures of aerosols lacing the snow that’s deposited on glaciers year after year. Ion concentrations are lower in winter than in summer because less polluted air can rise from the valley when the air is cold."



When the researchers analyzed the ice core from 2018, they found seasonal fluctuations in the amount of ion deposits - which is what they expected to find.&nbsp;



"But when we went to core the glacier in 2020, we noticed melting on the surface right away,” said Margit Schwikowski, an environmental chemist at <a href="https://www.psi.ch/en" target="_blank" rel="noreferrer noopener">Paul Scherrer Institute</a> in Switzerland.&nbsp;



<h2 class="wp-block-heading" id="h-rapid-surface-melting-on-corbassiere-glacier">Rapid surface melting on Corbassière glacier</h2>



The experts determined that melting on the glacier's surface likely penetrated the glacier layers below and carried away the aerosol ions. 



"This melting rendered the core unusable in the team’s research, and other attempts to core the glacier had the same result. The valuable information stored in the ice was destroyed," explained NASA.



Schwikowski has joined a team of other experts in an effort to preserve cores from the last remaining glaciers. Led by the <a href="https://www.ice-memory.org/" target="_blank" rel="noreferrer noopener">Ice Memory Foundation</a>, the goal of the project is to obtain ice cores from 20 endangered glaciers around the world in 20 years and collect them in a global <a href="https://www.earth.com/news/antarcticas-ice-has-a-history-of-rapid-and-unexpected-changes/" target="_blank" rel="noreferrer noopener">climate archive</a>.



“Glaciers are retreating worldwide, and we may find similar issues at other sites,” said Schwikowski. She added that even at the highest altitudes in the Alps, "glaciers are on the verge of becoming unsuitable as natural paleo-archives."



<h2 class="wp-block-heading" id="h-features-of-the-corbassiere-glacier">Features of the Corbassière Glacier</h2>



The Corbassière Glacier is a captivating natural feature located in the Swiss Alps, part of the canton of Valais. 



The glacier stretches over approximately 9 kilometers, making it one of the significant glaciers in the region. It originates from the Grand Combin, an imposing mountain massif that reaches heights of over 4,300 meters, contributing greatly to the glacier's nourishment through snow and ice accumulation.



A distinct feature of the Corbassière Glacier is its accessibility and the dramatic scenery it offers, which attracts many hikers and nature enthusiasts. 



One of the most notable attractions near the <a href="https://www.earth.com/news/doomsday-glacier-seems-to-have-lost-its-ability-to-recover/" target="_blank" rel="noreferrer noopener">glacier</a> is the Corbassière footbridge, a 210-meter long suspension bridge that provides stunning views of the glacier and the surrounding peaks. 



This bridge not only enhances the experience for visitors but also serves as a crucial observation point for scientists studying glacier dynamics and the effects of climate change.



<h2 class="wp-block-heading">The Swiss Alps&nbsp;</h2>



The Swiss <a href="https://www.earth.com/news/snow-cover-in-the-alps-could-soon-be-cut-in-half/" target="_blank" rel="noreferrer noopener">Alps</a> are a majestic and expansive mountain range that stretches across the southern part of Switzerland, forming a part of the greater Alpine region that spreads across several countries in Europe.&nbsp;



Renowned for their stunning beauty and formidable peaks, the Swiss Alps are not just a geographical landmark but also a cultural symbol of Switzerland, epitomizing its identity as a nation of scenic landscapes and outdoor adventure.



The region is famous for its dramatic scenery, including towering mountains, pristine lakes, and picturesque valleys. Among these peaks are some of the highest in Europe, such as the Dufourspitze, part of the Monte Rosa massif, which is the highest point in Switzerland. 



The Matterhorn, perhaps the most iconic of all Swiss mountains, is celebrated for its unique, pyramid-like shape and is a magnet for climbers and tourists alike.



Image Credit: NASA Earth Observatory



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The Corbassière glacier in the Swiss Alps

Today's Image of the Day from NASA Earth Observatory features thick haze over Thailand during the fire season. The photograph was captured on March 16, 2024 by the Visible Infrared Imaging Radiometer Suite (VIIRS) on the Suomi NPP satellite.



<h2 class="wp-block-heading" id="h-waves-of-smoke-and-haze">Waves of smoke and haze</h2>



"Each year in January and February, satellites begin to detect waves of smoke and fire in Southeast Asia, particularly in highland forests in Cambodia, Laos, Myanmar, and Thailand. <a href="https://www.earth.com/image/intense-fire-season-in-mexico-is-part-of-a-worldwide-trend/" target="_blank" rel="noreferrer noopener">Fire activity</a> continues to increase through March and April, reaches a peak during the height of the dry season, and then fades in May with the start of the rainy season," noted <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA</a>.



"Individual fires are usually small and short-lived. But they are often so numerous that smoke, along with air pollution from rural and urban areas, mixes to produce thick layers of haze that blanket the landscape." 



According to NASA, the haze contains mixtures of small airborne particles called aerosols and gaseous pollutants such as nitrogen dioxide, sulfur dioxide, carbon monoxide, and ozone that degrade air quality.



<h2 class="wp-block-heading" id="h-haze-in-thailand-nbsp">Haze in Thailand&nbsp;</h2>



An international field campaign - the Airborne and Satellite Investigation of Asian Air Quality (ASIA-AQ) - was launched to investigate the haze in Thailand.



"During the last two weeks of March 2024, NASA’s DC-8 and Gulfstream III aircraft flew several flights over Chiang Mai, Bangkok, and rural areas surrounding the cities to sample air quality with several sensors. At the same time, satellites observed the haze from above," said NASA.



James Crawford, ASIA-AQ’s principal investigator, said the team is collaborating closely with national and local government entities in Thailand.



“The goal is to take as many simultaneous measurements of pollutants as possible from the ground, air, and space,” said Crawford. The team will use the data to gain a better understanding of how the haze forms, evolves chemically over time, and moves throughout the region.



<h2 class="wp-block-heading" id="h-haze-and-public-health-in-thailand">Haze and public health in Thailand </h2>



According to media reports, nearly 200,000 people have been hospitalized this year due to air quality in the region, with over 1.3 million people falling ill since January.&nbsp;



<h3 class="wp-block-heading" id="h-causes-of-the-haze">Causes of the haze</h3>



The root causes of the haze include agricultural burning, particularly of corn fields, as part of slash-and-burn practices to prepare land for the next planting cycle. This is exacerbated by the dry season when there's little rain to wash the pollutants away. 



The situation is worsened by industrial emissions and vehicle fumes, particularly in urban areas like Bangkok​.



<h3 class="wp-block-heading" id="h-sustainable-solutions-are-needed">Sustainable solutions are needed</h3>



Efforts to address the crisis have been complex, involving local and transboundary issues. Much of the agricultural burning occurs not only within Thailand but also in neighboring countries like Myanmar and Laos, contributing to the transboundary nature of the haze. 



Activists and local communities have called for sustainable solutions that do not exacerbate the poverty of smallholder farmers, emphasizing the need for affordable and realistic alternatives to burning​.



<h3 class="wp-block-heading" id="h-mitigation-measures-nbsp">Mitigation measures&nbsp;</h3>



The Thai government has implemented a no-burning rule until the end of April to combat wildfires and haze, but enforcement and effectiveness remain challenges​​. 



Some measures taken to mitigate the immediate effects of pollution in urban areas include spraying water and seeding clouds to encourage rain, although these have had limited success​​.



This ongoing environmental crisis has sparked widespread concern among citizens, who are increasingly using public interest litigation to hold companies and the government accountable for environmental commitments. 



With recent political changes, there is hope that the new administration will take more decisive action against the haze, possibly through more stringent regulations and international cooperation​​.



<h2 class="wp-block-heading" id="h-health-impacts-of-haze">Health impacts of haze</h2>



Haze poses several health hazards for those exposed to it, particularly when it contains fine particulate matter (PM2.5). Here are some of the main health risks associated with exposure to haze:



<h3 class="wp-block-heading" id="h-respiratory-problems">Respiratory problems</h3>



Haze can aggravate conditions such as asthma, bronchitis, and other chronic obstructive pulmonary diseases (COPD). The fine <a href="https://www.earth.com/news/heatwaves-and-air-pollution-may-double-fatal-heart-attack-risk/">particles</a> can penetrate deep into the lungs, causing inflammation and reducing lung function.



<h3 class="wp-block-heading" id="h-cardiovascular-issues-and-haze">Cardiovascular issues and haze</h3>



Exposure to fine particulate matter can also affect the cardiovascular system, leading to increased risk of heart attacks, strokes, and high blood pressure. Particles can affect blood vessel function and promote the formation of blood clots.



<h3 class="wp-block-heading" id="h-eye-irritation">Eye irritation</h3>



Haze can cause eye irritation, leading to conditions such as conjunctivitis (pink eye) or exacerbated symptoms in people with existing eye conditions.



<h3 class="wp-block-heading" id="h-skin-problems">Skin problems</h3>



For some people, exposure to <a href="https://www.earth.com/news/air-pollution-will-increase-dramatically-in-a-hotter-climate/">polluted air</a> can cause skin irritation or exacerbate skin conditions like eczema or psoriasis.



<h3 class="wp-block-heading" id="h-reduced-immune-function">Reduced immune function</h3>



There is evidence to suggest that prolonged exposure to polluted air can weaken the immune system, making individuals more susceptible to infections.



<h3 class="wp-block-heading" id="h-impact-on-mental-health">Impact on mental health</h3>



There are growing concerns about the impact of air pollution on <a href="https://www.earth.com/news/air-pollution-linked-to-multiple-chronic-health-conditions/">mental health</a>, with studies suggesting a link between exposure to polluted air and an increased risk of depression and anxiety.



<h3 class="wp-block-heading" id="h-pregnant-women-and-children">Pregnant women and children</h3>



Pregnant women, children, and the elderly are particularly vulnerable to the effects of haze. There may be increased risks of preterm birth and low birth weight in babies, and children may experience delayed development and reduced lung function.



The health impacts of haze can be mitigated by staying indoors on days when <a href="https://www.earth.com/news/twenty-years-of-air-quality-improvement-erased-by-wildfires/" target="_blank" rel="noreferrer noopener">air quality</a> is particularly poor, using air purifiers, wearing masks designed to filter out fine particles, and following local health advisories.



Image Credit: NASA Earth Observatory



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<h3 class="wp-block-heading" id="h-nbsp">&nbsp;</h3>

Haze pollution is an environmental crisis in Thailand

Today's Image of the Day from NASA Webb Images features an extraordinary view of Uranus, the seventh planet from the sun in our solar system.&nbsp;



The photo reveals the rings, moons, and extreme seasons of the ice giant Uranus in unprecedented detail.&nbsp;



<h2 class="wp-block-heading" id="h-dynamic-north-polar-cap-nbsp">Dynamic north polar cap&nbsp;</h2>



“The Webb image exquisitely captures Uranus’s seasonal north polar cap, including the bright, white, inner cap and the dark lane in the bottom of the polar cap,” noted NASA.



Unlike Earth, where polar ice caps are formed by the freezing of water, Uranus's polar caps are thought to be primarily composed of a dense concentration of haze in the atmosphere.&nbsp;



The polar cap's haze is likely composed of methane particles. Methane in Uranus's atmosphere condenses into ice particles, which then create a thick haze that scatters sunlight, giving the polar cap its distinct bright appearance in visible and infrared light.



The polar cap is dynamic and changes over time. It becomes more prominent during the summer season of each pole. 



As Uranus moves along its orbit, the cap's appearance transforms, with the haze becoming thicker and brighter when the pole is in continuous sunlight.



<h2 class="wp-block-heading" id="h-the-zeta-ring-nbsp">The Zeta ring&nbsp;</h2>



The inner and outer rings of Uranus are visible in the image, including Zeta - the innermost ring which is the faintest and most difficult to observe.



The <a href="https://www.earth.com/news/stunning-photo-of-uranus-and-its-rings-and-moons-captured-by-the-webb-telescope/" target="_blank" rel="noreferrer noopener">rings of Uranus</a> are primarily composed of narrow bands of particles, likely made of water ice mixed with a dark material. These rings are distinct from those of Saturn in that they are much darker and narrower.



The faintness and characteristics of the Zeta ring make it a subject of interest in studies related to the dynamics and composition of planetary ring systems.



<h2 class="wp-block-heading" id="h-moons-of-uranus-nbsp">Moons of Uranus&nbsp;</h2>



The <a href="https://science.nasa.gov/mission/webb/multimedia/images/" target="_blank" rel="noreferrer noopener">Webb</a> photo also features nine of the planet’s <a href="https://www.earth.com/news/nasa-four-uranus-moons-may-have-oceans-that-are-miles-deep/" target="_blank" rel="noreferrer noopener">moons</a>, which appear as blue dots surrounding the rings.&nbsp;



“Clockwise starting at 2 o’clock, they are: Rosalind, Puck, Belinda, Desdemona, Cressida, Bianca, Portia, Juliet, and Perdita. The orbits of these moons share the 98-degree tilt of their parent planet relative to the plane of the solar system,” noted NASA.



Uranus has 27 known moons, and they are divided into three main groups based on their orbits: the inner moons, the major moons, and the irregular moons.



The <a href="https://www.earth.com/news/uranus-moon-ariel-may-have-a-hidden-ocean/" target="_blank" rel="noreferrer noopener">moons</a> of Uranus are unique because they are named after characters from the works of William Shakespeare and Alexander Pope, rather than being named after figures from classical mythology, as is common for the moons of other planets.



<h2 class="wp-block-heading" id="h-the-ice-giant-uranus-nbsp">The ice giant Uranus&nbsp;</h2>



Uranus is classified as an "ice giant" because, unlike the gas giants Jupiter and Saturn, which are primarily composed of hydrogen and helium, Uranus has a significant proportion of "ices" in its composition.&nbsp;



In astronomical terms, ices refer to volatile substances like water, ammonia, and methane, which exist in solid or liquid forms at the low temperatures found in the outer solar system.



Uranus has a thick atmosphere of hydrogen and helium, but beneath that, it contains a large, dense mantle composed of these ices, along with rock and other heavier elements.&nbsp;



The term <a href="https://www.earth.com/news/diamond-rain-may-be-common-on-giant-icy-planets/" target="_blank" rel="noreferrer noopener">ice giant</a> differentiates Uranus (and Neptune, the other ice giant) from the larger gas giants, emphasizing the different chemical compositions and internal structures of these planets.



<h2 class="wp-block-heading" id="h-climate-of-uranus-nbsp">Climate of Uranus&nbsp;</h2>



Uranus has a unique and extreme climate, largely influenced by its unusual tilt, which causes the planet to rotate almost on its side. This tilt leads to extreme seasonal variations, with each pole experiencing 42 years of continuous sunlight followed by 42 years of darkness.&nbsp;



Even though it is closer to the sun than Neptune, Uranus is the coldest planet in the solar system, with temperatures plunging to as low as -224°C (-371°F). The reason for this is not fully understood, but it might be due to an internal heat distribution anomaly.



Despite these frigid conditions, Uranus experiences intense weather patterns, including powerful storms and winds that can reach speeds of up to 900 kilometers per hour. These winds blow in the same direction as the planet’s rotation and are some of the fastest in the solar system.



Storms on Uranus are driven by its internal heat and the interaction of its <a href="https://www.earth.com/news/uranus-is-more-gassy-less-icy-than-we-ever-imagined/" target="_blank" rel="noreferrer noopener">atmospheric gases</a>. Observations have shown that these storms can be quite large, sometimes comparable in size to the Earth, and can last for several years.&nbsp;



The planet’s extreme axial tilt also means that the storms and weather patterns are highly variable, depending on the season. During equinoxes, when the Sun is directly over the equator, Uranus exhibits more storm activity compared to when the poles are pointed towards the Sun or away from it.



<h2 class="wp-block-heading" id="h-observations-of-uranus">Observations of Uranus</h2>



“One day on Uranus is about 17 hours, so the planet’s rotation is relatively quick. This makes it supremely difficult for observatories with a sharp eye like Webb to capture one simple image of the entire planet - storms and other atmospheric features, and the planet’s moons, move visibly within minutes,” explained NASA.



“This image combines several longer and shorter exposures of this dynamic system to correct for those slight changes throughout the observing time.”



The first recorded observations of Uranus were made by John Flamsteed on December 13, 1690. However, Flamsteed mistakenly identified the planet as a star, which he named “34 Tauri."&nbsp;



It wasn't until March 13, 1781, that Uranus was officially identified as a planet by William Herschel. He initially thought he had discovered a comet, but further observations and calculations by other astronomers confirmed that it was a new planet, making Uranus the first planet discovered in modern history with the aid of a telescope.



Image Credit: NASA, ESA, CSA, STScI



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The ice giant Uranus in stunning detail

Today's Image of the Day from NASA Webb Images features...

The MODIS instrument, short for Moderate Resolution Imaging Spectroradiometer, is a key instrument aboard the Terra and Aqua satellites. MODIS is playing a vital role in the development of Earth ecosystem models, able to predict global changes, which then assist policy makers in making informed decisions about the protection of the global environment.

Heavy snow and cloud cover in the Alps are seen in this Image of the day&nbsp;from the <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> and features a look at heavy snow and low clouds in the Alps. Wildlife such as ibex live in the higher peaks to elevations of 3,400 m (11,155 ft), and plants such as Edelweiss grow in rocky areas in lower elevations as well as in higher elevations.

Heavy snow and cloud cover in the Alps

Monitoring Earth Changes with MODIS

Aqua is a NASA scientific research satellite that studies precipitation, evaporation, and water cycles. Terra and Aura make up the Earth Observing System. It's the second component of the system.

A frozen Lake Erie in February Today’s Image of the Day comes from the <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> and features a look at a frozen <a href="https://www.earth.com/image/icy-lake-erie/">Lake Erie</a>, which is currently 93.3 percent iced over. A frozen Lake Erie in February
This false-color image was created using data from the Moderate Resolution Imaging Spectroradiometer (MODIS) on board the Aqua satellite to differentiate between snow, ice, and clouds.
Lake Erie /ˈɪəri/ (French: Lac Érié) is the fourth-largest lake (by surface area) of the five Great Lakes in North America, and the eleventh-largest globally if measured in terms of surface area.It is the southernmost, shallowest, and smallest by volume of the Great Lakes and therefore also has the shortest average water residence time. At its deepest point Lake Erie is 210 feet (64 metres) deep. 
Situated on the International Boundary between Canada and the United States, Lake Erie&#8217;s northern shore is the Canadian province of Ontario, specifically the Ontario Peninsula, with the U.S. states of Michigan, Ohio, Pennsylvania, and New York on its western, southern, and eastern shores. These jurisdictions divide the surface area of the lake with water boundaries. 
The lake was named by the Erie people, a Native American people who lived along its southern shore. The tribal name &#8220;erie&#8221; is a shortened form of the Iroquoian word erielhonan, meaning long tail
&#8212;
By <a href="mailto:rarnold@earth.com">Rory Arnold</a>, <a href="https://www.earth.com/staff">Earth.com</a> Staff Writer
Image Credit: <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a>

A frozen Lake Erie in February

Aqua Earth Observing Satellite

This beautiful photo gallery contains 50 incredible images of Earth from Space. These images were taken by astronauts onboard the International Space Station, as well as by a multitude of NASA satellites orbiting the earth.

Today’s Image of the Day comes thanks to the <a href="https://earthobservatory.nasa.gov/IOTD/view.php?id=90654&amp;eocn=home&amp;eoci=iotd_readmore">NASA Earth Observatory</a> and features a look at Super Typhoon Noru in the Pacific Ocean just south of <a href="https://www.earth.com/news/first-blue-chrysanthemums-created/">Japan</a>.
This image was captured by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite on July 31, 2017. 
At the time the photo was taken, Typhoon Noru was located just 250 kilometers south of Iwo Jima. Maximum sustained winds hit 150 miles per hour.
The storm briefly became a category 5 on July 30, before being downgraded to a category 4 one day later.
&#8211;
By <a href="mailto:rarnold@earth.com">Rory Arnold</a>, <a href="https://www.earth.com/staff">Earth.com</a> Staff Writer
Source: <a href="https://earthobservatory.nasa.gov/IOTD/view.php?id=90654&amp;eocn=home&amp;eoci=iotd_readmore">NASA Earth Observatory</a>

Super Typhoon Noru in the Pacific Ocean

Incredible Images of Earth from Space

Photos from the International Space Station are found in this awesome Earth.com image gallery. Flat-earthers won't agree, but these incredible photos of the Earth were taken by astronauts onboard the International Space Station. The International Space Station is a modular space station in low Earth orbit.

Northern Italy from the space station is seen here in this Image of the Day from the <a href="http://www.esa.int/">European Space Agency</a> (ESA). The view includes the top half of the Italian Peninsula, along with <a href="https://www.earth.com/image/wildfires-burn-northern-corsica/">Corsica</a> and Sardinia off the coast. This image was captured by ESA astronaut Paolo Nespoli on his third and final mission to the Space Station.

Northern Italy from the Space Station

Photos from the International Space Station

Have you ever heard the saying, "an elephant never forgets?" Unfortunately, 2020 will be a year that African elephants will remember with sorrow.



The story is one of environmental reckoning - the result of a devastating interaction between elephants and toxic algae blooms.



<h2 class="wp-block-heading" id="h-deadly-footprint-of-climate-change">Deadly footprint of climate change </h2>



In 2020, a shocking event unfolded in Botswana, a country home to one-third of all African elephants. Approximately 350 of these <a href="https://www.earth.com/news/world-elephant-day-2024-saving-the-gentle-giants/" target="_blank" rel="noreferrer noopener">majestic creatures</a> met a tragically premature end, with their carcasses scattered across the Okavango Delta.



The deaths were no ordinary occurrence. They ignited global concern and sparked an intense investigation.&nbsp;



A new study led by King's College London offers an alarming revelation. The unexplained deaths of 350 elephants in 2020 were caused by lethal blankets of toxic algae in watering holes - a deadly byproduct of <a href="https://search.app?link=https%3A%2F%2Fwww.earth.com%2Fnews%2Fclimate-change-earth-energy-imbalance-temperature-rise%2F&amp;utm_campaign=aga&amp;utm_source=agsadl2%2Csh%2Fx%2Fgs%2Fm2%2F4" target="_blank" rel="noreferrer noopener">climate change</a>.



<h2 class="wp-block-heading" id="h-mystery-of-the-mass-elephant-die-off">Mystery of the mass elephant die-off </h2>



The initial discovery of elephant carcasses scattered in the northeastern sector of Botswana's Okavango Delta triggered global concern.



With no evidence of poaching, the mystery of sudden mass elephant deaths deepened. As the death toll rose to an alarming 350, a theory started to surface. Could <a href="https://search.app?link=https%3A%2F%2Fwww.earth.com%2Fnews%2Fhumans-have-caused-toxic-algae-blooms-since-the-bronze-age%2F&amp;utm_campaign=aga&amp;utm_source=agsadl2%2Csh%2Fx%2Fgs%2Fm2%2F4" target="_blank" rel="noreferrer noopener">toxic algae</a> blooming in the elephants' watering holes be responsible?



The study was led by PhD student Davide Lomeo at <a href="https://www.kcl.ac.uk" target="_blank" rel="noreferrer noopener">King's College London</a>. He was co-supervised by Plymouth Marine Laboratory (<a href="https://pml.ac.uk" target="_blank" rel="noreferrer noopener">PML</a>) and the Natural History Museum.



“Botswana is home to a third of all <a href="https://www.earth.com/news/african-elephants-have-drastically-declined-in-the-last-50-years/" target="_blank" rel="noreferrer noopener">African elephants</a>, and this unprecedented die-off within their largest remaining population underlines the escalating concerns surrounding the impact of drought and climate change on the Okavango Delta, one of the most important ecosystems in the world,” explained Lomeo.



<h2 class="wp-block-heading" id="h-toxic-algae-linked-to-elephant-deaths">Toxic algae linked to elephant deaths</h2>



The investigators turned to a combination of sophisticated satellite data and spatial analysis. They scrutinized the relationships between approximately 3,000 watering holes and the locations where the deceased elephants had been found.



The analysis revealed that waterholes near the carcasses showed a dramatic uptick in algal levels and frequent bloom events in 2020 compared to the previous years - notably during the mass mortality event.



“We identified 20 waterholes near fresh carcasses that experienced increased algal bloom events in 2020 compared to the previous three years combined. These waterholes also exhibited the highest average algal biomass of the period 2015 – 2023,” noted Lomeo.



<h2 class="wp-block-heading" id="h-calling-out-climate-change">Calling out climate change</h2>



The researchers pointed out the events that led to this catastrophe. A grueling dry year in 2019, the driest in decades, was abruptly followed by an extraordinarily wet year in 2020.



The sudden shift stirred up substantial amounts of sediments and nutrients from the ground, providing ideal conditions for toxic algal growth.



“Southern Africa is projected to become drier and hotter under climate changes, and as a result waterholes across this region will likely be drier for more months of the year," said Lomeo.



"Our findings point to the potential negative effects on water quantity and quality, and catastrophic repercussions this could have on animals."



<h2 class="wp-block-heading" id="h-solutions-for-water-quality-monitoring">Solutions for water quality monitoring</h2>



To combat the threat posed by toxic algal growth, innovative technological solutions are emerging to aid in comprehensive water quality monitoring. 



Earth observation applications, such as satellite imagery and remote sensing techniques, offer the potential to detect and monitor diverse sources of contamination swiftly. 



By leveraging these advanced tools, scientists and authorities can gain valuable insights into water quality, enabling timely interventions and preventive measures.



<h2 class="wp-block-heading" id="h-urgent-need-for-swift-intervention">Urgent need for swift intervention </h2>



Tackling the environmental impact of toxic algae blooms requires collaboration among researchers, local authorities, and communities.



By sharing knowledge and using sustainable methods, we can protect our valuable water resources. With scientific expertise, technology, and public awareness, we can ensure clean water for future generations.



The case of Botswana's elephants sheds light on the severe ecological consequences of toxic algae proliferation. 



The findings highlight the urgent need for comprehensive water quality surveillance across all water bodies.



This issue is a wake-up call for Botswana and the world, pointing to the urgent need to tackle climate change and its effects on ecosystems.



The study is published in the journal <a href="https://www.sciencedirect.com/science/article/pii/S0048969724076824?via%3Dihub" target="_blank" rel="noreferrer noopener">Science of The Total Environment</a>.



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Poisoning deaths of 350 elephants linked to climate change

Have you ever heard the saying, "an elephant never forgets?"...

The Phlegraean Fields, now considered one massive supervolcano, are beginning to stir, making the scientific community uneasy. 



These volcanic fields, nestled just west of Naples, Italy, are among the top eight emitters of volcanic carbon dioxide worldwide. 



Since 2005, one spot in particular -- the Solfatara crater -- has been releasing increased volumes of gas, catching the attention of researchers and locals alike.



<h2 class="wp-block-heading" id="h-gas-emissions-at-solfatara-crater">Gas emissions at Solfatara crater</h2>



Gianmarco Buono, a volcanologist at the Italian National Institute of Geophysics and Volcanology (<a href="https://www.ingv.it/en/home" target="_blank" rel="noreferrer noopener">INGV</a>), is leading a study to understand what's behind this surge in gas emissions. 



"Estimating the source of the carbon dioxide is important to properly reconstruct what is happening in the magmatic system and the <a href="https://www.earth.com/news/knipovich-ridge-new-hydrothermal-field-arctic-intense-geological-activity/" target="_blank" rel="noreferrer noopener">hydrothermal system</a>," says Buono. 



His team aims to provide a tool that can distinguish between carbon dioxide coming from magma and that released by other processes, a method that could be useful in volcanic regions around the world.



<h2 class="wp-block-heading" id="h-what-exactly-is-a-supervolcano">What exactly is a supervolcano?</h2>



In the simplest of terms, a supervolcano is essentially a volcano on steroids. It's a <a href="https://www.earth.com/news/how-early-humans-survived-the-eruption-of-toba-supervolcano/" target="_blank" rel="noreferrer noopener">massive volcanic system</a> capable of producing eruptions thousands of times more powerful than a regular volcano. 



These eruptions can eject more than 1,000 cubic kilometers of material into the atmosphere, which can have catastrophic effects on the global climate and environment.



You've probably heard of places like <a href="https://www.earth.com/news/yellowstone-tourism-generates-over-1-megaton-carbon-annually/" target="_blank" rel="noreferrer noopener">Yellowstone National Park</a> in the United States -- that's one of the most famous supervolcanoes. 



When a supervolcano erupts it can form a giant caldera, which is a huge crater that can span dozens of miles. 



The sheer scale of these eruptions makes them rare, but they're definitely something scientists keep an eye on due to their potential impact on <a href="https://www.earth.com/news/yellowstones-supervolcano-holds-a-surprising-amount-of-magma/" target="_blank" rel="noreferrer noopener">life across the planet</a>.



<h2 class="wp-block-heading" id="h-numbers-speak-volumes">Numbers speak volumes</h2>



Today, the Solfatara crater emits between 4,000 and 5,000 tons of carbon dioxide each day. To put that into perspective, that's equivalent to the emissions from burning about 500,000 gallons of gasoline daily. 



In their recent paper published in Geology, Buono and his colleagues estimate that 20% to 40% of this carbon dioxide comes from the dissolution of calcite in the surrounding rocks. The remaining 60% to 80% is traced back to <a href="https://www.earth.com/news/the-sun-affects-magma-formation-deep-within-the-earth/" target="_blank" rel="noreferrer noopener">underground magma</a>.



<h2 class="wp-block-heading" id="h-science-behind-the-solfatara-crater-gas">Science behind the Solfatara crater gas</h2>



When magma moves <a href="https://www.earth.com/news/volcanic-magma-traced-to-melting-in-earths-crust/" target="_blank" rel="noreferrer noopener">closer to the Earth's surface</a>, the pressure decreases, causing gases that were trapped inside to escape. These gases include water vapor, carbon dioxide, and sulfur dioxide. 



Scientists keep a close eye on volcanoes by monitoring earthquakes, measuring ground deformation, and analyzing gases emitted from fumaroles -- openings in the Earth's crust that release steam and gases.



An uptick in gas emissions can be a sign of potential volcanic activity. However, not every increase leads to an eruption. 



Sometimes, carbon dioxide is released when hot underground fluids interact with the rocks above, rather than from magma itself.



<h2 class="wp-block-heading" id="h-monitoring-changes-over-decades">Monitoring changes over decades</h2>



Since 1983, the Italian National Institute of Geophysics and Volcanology has been keeping tabs on the gas emissions from the Solfatara crater. 



By studying the ratios of nitrogen, helium, and carbon dioxide, researchers had initially concluded that the gases were primarily from <a href="https://www.earth.com/news/the-sun-affects-magma-formation-deep-within-the-earth/" target="_blank" rel="noreferrer noopener">deep magma sources</a>. 



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2024/11/Phlegraean-fields_supervolcano_caldera_satellite-view_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2024/11/Phlegraean-fields_supervolcano_caldera_satellite-view_1s.webp" alt="Satellite view of Phlegraean Fields and Solfatara crater showing a large caldera supervolcano west of Naples, Italy. It is part of the Campanian volcanic arc, which includes Mount Vesuvius." class="wp-image-1951186"/></a><figcaption class="wp-element-caption">Satellite view of Phlegraean Fields and Solfatara crater showing a large caldera supervolcano west of Naples, Italy. It is part of the Campanian volcanic arc, which includes Mount Vesuvius.</figcaption></figure>



"We focused mainly on geochemical variation, especially for carbon dioxide, helium, and nitrogen, because they are non-reactive species. They contain information about what is happening in the magma," Buono explains.



But things started to change in 2005. The data began to deviate from the typical chemical signatures of magma-derived gases. This shift continued over time, accompanied by rising temperatures in the shallow hydrothermal system. 



By 2012, the alert level for the region was raised from green to yellow, signaling heightened activity but not an immediate threat of eruption.



<h2 class="wp-block-heading" id="h-clues-from-the-earth-s-movements">Clues from the Earth's movements</h2>



The area didn't just experience changes underground. Small earthquakes and noticeable ground deformation were also observed. 



These signs pointed toward the circulation of hot fluids <a href="https://www.earth.com/news/new-research-enhances-predictions-on-volcanic-eruptions/" target="_blank" rel="noreferrer noopener">beneath the surface</a>. When these hot, acidic fluids interact with calcite in the rocks, they can release additional carbon dioxide.



Previous studies involving drill cores of the local rocks revealed that the calcite present has a composition similar to the gases being emitted. 



Based on this information, Buono's team estimated that 20% to 40% of the carbon dioxide at the Solfatara crater comes from the breakdown of calcite in the host rocks.



The Phlegraean Fields have a long volcanic history, with activity dating back approximately 40,000 years. The most recent eruption occurred in 1538. 



Since the 1950s, the region has experienced several phases of unrest, reminding us that <a href="https://www.earth.com/news/volcanic-super-eruptions-build-up-for-millions-of-years/" target="_blank" rel="noreferrer noopener">Earth's geology is always in motion</a>.



<h2 class="wp-block-heading" id="h-why-does-this-matter">Why does this matter?</h2>



Understanding the source of carbon dioxide emissions in volcanic regions is crucial for public safety and environmental monitoring. 



By distinguishing between gases released from magma and those from other processes, scientists can better predict <a href="https://www.earth.com/news/underwater-volcanic-eruptions-are-more-harmful-than-previously-believed/" target="_blank" rel="noreferrer noopener">volcanic activity</a> and assess potential risks.



Buono's research not only sheds light on the complex interactions beneath the Phlegraean Fields but also provides tools that could be applied to other volcanic areas. 



As he notes, "Our aim is to provide a tool to better discriminate the contribution of magmatic and non-magmatic carbon dioxide that can also be applied to other systems."



<h2 class="wp-block-heading" id="h-solfatara-crater-and-the-future">Solfatara crater and the future</h2>



To sum it all up, figuring out what's really going on beneath the Phlegraean Fields and Solfatara crater is a big deal -- not just for the science buffs but for everyone living on Earth.



Buono's team has shown that the spike in carbon dioxide emissions isn't just magma pushing its way up. A good chunk of that gas is actually coming from hot fluids interacting with calcite-rich rocks underground. 



This kind of info is gold because it helps us keep a closer eye on volcanic activity and, more importantly, keeps people safe.



Looking ahead, keeping tabs on these emissions and understanding their sources is key. By knowing whether the carbon dioxide is from magma or from rock interactions, scientists can better predict what's coming next. 



The Phlegraean Fields are a vivid reminder that our planet is always on the move. Scientists like Buono will keep unraveling the mysteries beneath our feet, helping us understand the dynamic planet we call home.



The full study was published in the journal <a href="https://pubs.geoscienceworld.org/gsa/geology/article/51/4/397/620796/Discriminating-carbon-dioxide-sources-during" target="_blank" rel="noreferrer noopener">Geology</a>.



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Supervolcano is waking up, which would plunge the world into chaos

The Phlegraean Fields, now considered one massive supervolcano, are beginning...

About 6 million years ago, an extraordinary event occurred that restructured the Mediterranean and its water. This phenomenon, known as the Messinian Salinity Crisis, transformed the sea into a massive salt basin.



But how did a million cubic kilometers of salt come to rest in such a short time on the Mediterranean seabed? Until now, that remained a mystery.



Now, scientists have made a significant breakthrough. By analyzing chlorine isotopes found in the salt on the Mediterranean seabed, they've unveiled the two distinct phases of this intense evaporation event.



<h2 class="wp-block-heading" id="h-phases-of-desiccation-and-salt-accumulation">Phases of desiccation and salt accumulation</h2>



The first desiccation phase lasted approximately 35,000 years. During this time, salt deposition occurred exclusively in the eastern <a href="https://www.earth.com/image/corsica-sardinia-mediterranean-sea/" target="_blank" rel="noreferrer noopener">Mediterranean</a>. This was due to a restriction of the Mediterranean outflow into the Atlantic, resulting in a brine-filled basin in the east.



The second phase, however, was a different story altogether. Over less than 10,000 years, salt accumulation took place throughout the entire Mediterranean.



An expeditious evaporative event caused such a sharp decline in sea-level - 1.7-2.1 kilometers in the east, and approximately 0.85 kilometers in the west - that the Mediterranean basin lost up to 70% of its total water volume.



Moreover, change on such a monumental scale didn't occur without <a href="https://www.earth.com/news/distress-signals-earths-water-cycle-is-becoming-more-erratic/" target="_blank" rel="noreferrer noopener">repercussions</a>. The effects of the spectacular fall in sea level were far-reaching and not just limited to the marine environment itself.



<h2 class="wp-block-heading" id="h-factors-linked-to-mediterranean-water-loss">Factors linked to Mediterranean water loss</h2>



Local volcanic eruptions may have been triggered due to the release of pressure on Earth's crust. These eruptions could be thought of as Earth's reactions to the rapid loss of such a substantial amount of water weight.



Moreover, this large scale evaporative event also might have influenced global climate patterns. The drastic depression caused by the sea-level drawdown rippled outwards, affecting weather systems far and wide.



These results point towards a better understanding of not just the Messinian Salinity Crisis, but also of the ways extreme desiccation events can drastically alter ecosystems and climates on a global scale.



In the last moments of this salinity crisis, the sea-level of the Mediterranean was almost a kilometer below that of the Atlantic Ocean. This extreme difference lead to the eventual collapse of the Strait of Gibraltar.



<h2 class="wp-block-heading" id="h-mediterranean-water-loss-and-marine-life">Mediterranean water loss and marine life</h2>



The Messinian Salinity Crisis also posed significant challenges for marine life in the Mediterranean basin. 



The extreme hypersaline conditions would have been inhospitable for most marine organisms, leading to mass extinctions of species that could not adapt. 



However, evidence suggests that some extremophilic organisms (organisms capable of surviving in highly saline environments) managed to persist during this period. 



Fossil records indicate that isolated pockets of less saline water, or refugia, may have existed, providing temporary habitats for certain species. These pockets paint a picture of resilience amidst an environment of extreme ecological stress.



<h2 class="wp-block-heading" id="h-restoration-of-the-mediterranean-water">Restoration of the Mediterranean water</h2>



The collapse of the Strait of Gibraltar acted as a gateway for the Atlantic Ocean to flow back into the Mediterranean. This sudden influx of water ended the prolonged desiccation, refilling the Mediterranean basin and restoring its water levels. 



As a result, the Mediterranean transitioned from a nearly dry, hypersaline basin dominated by thick salt deposits into a thriving open sea once again, with normal marine conditions and ecosystems returning over time. 



This event marked the resolution of the Messinian Salinity Crisis, reshaping the region's geography and ecological dynamics permanently.



<h2 class="wp-block-heading" id="h-modern-climate-challenges">Modern climate challenges</h2>



The insights gained from studying the Messinian Salinity Crisis carry valuable lessons for our understanding of current and future <a href="https://www.earth.com/news/global-drought-has-caused-crisis-levels-of-food-and-water-scarcity/" target="_blank" rel="noreferrer noopener">environmental changes</a>. 



This event showcases how rapid geological and hydrological transformations can trigger cascading effects on the climate, ecosystems, and even tectonic activity. 



Contemporary concerns about rising temperatures, altering precipitation patterns, and water scarcity echo some of the climate disruptions that may have been felt during the crisis. 



By learning from this historic event, scientists emphasize the importance of global collaboration and sustainable resource management to mitigate the impacts of looming environmental challenges on both natural systems and human societies.



<h2 class="wp-block-heading" id="h-significance-of-the-study">Significance of the study</h2>



This research on the history of Mediterranean water has provided fresh insights into historical geological events, enhancing our comprehension of these past occurrences.



By examining these findings, scientists and researchers have the opportunity to improve their predictions about future geological phenomena. 



Understanding the patterns and causes of past events allows for better preparation and response strategies, potentially reducing the adverse impacts of similar events that may occur in the future. 



<h2 class="wp-block-heading" id="h-learning-from-geological-history">Learning from geological history</h2>



The study emphasizes the importance of learning from past geological activities to make informed decisions that safeguard communities and environments against natural disasters. It raises a critical question: will we apply the lessons learned to protect our future? 



The findings from the study serve as a call to action, urging society to integrate historical lessons into future planning and preparedness efforts.



The study was led by G. Aloisi, a scientist at the French National Centre for Scientific Research (<a href="https://www.cnrs.fr/en" target="_blank" rel="noreferrer noopener">CNRS</a>), which is one of the largest governmental research organizations in France.



The study is published in the journal <a href="https://www.nature.com/articles/s41467-024-53781-6" target="_blank" rel="noreferrer noopener">Nature Communications</a>.



Image Credit: Pibernat &amp; Garcia-Castellanos



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Mediterranean Sea lost almost all of its water, triggering a global crisis

About 6 million years ago, an extraordinary event occurred that...

Quantum states, such as quantum superposition "cat states," are notorious for their fragility, often disappearing in the blink of an eye. But imagine keeping such a delicate state stable not just for seconds, but for nearly half an hour. 



That's exactly what a team of scientists has achieved, maintaining a quantum superposition -- known as a "cat state" -- for an astonishing 23 minutes.



<h2 class="wp-block-heading" id="h-quantum-cat-states-and-superposition">Quantum "cat states" and superposition</h2>



Quantum superposition is the idea that tiny particles can be in <a href="https://www.earth.com/news/quantum-entanglement-a-simple-way-to-grasp-this-impossible-concept-carl-kocher/" target="_blank" rel="noreferrer noopener">multiple states at the same time</a>. A great way to understand this is through Schrödinger's cat, a famous thought experiment.



Imagine you have a cat in a closed box with a device that has a 50% chance of releasing poison based on something random happening at the quantum level, like an atom decaying. 



According to superposition, until you open the box to check, the cat is both alive and dead at the same time. 



This strange scenario shows just how weird and mind-bending quantum mechanics can be, challenging our everyday ideas about how things work.



The "cat state" takes this superposition idea and applies it to something bigger and more familiar, like a cat, to highlight <a href="https://www.earth.com/news/quantum-entanglement-a-simple-way-to-grasp-this-impossible-concept-carl-kocher/" target="_blank" rel="noreferrer noopener">how bizarre quantum theory really is</a>. 



By imagining the cat being both alive and dead, we can better understand the tricky parts of <a href="https://www.earth.com/news/quantum-entanglement-speed-measured-for-first-time-too-fast-to-comprehend/" target="_blank" rel="noreferrer noopener">quantum mechanics</a> and why simply observing something can change its state. 



This example is still a key part of conversations about what reality is really like and the mysterious behaviors of the quantum world.



<h2 class="wp-block-heading" id="h-maintaining-cat-state-stability">Maintaining cat state stability</h2>



Leading the charge is Zheng-Tian Lu, a researcher at the <a href="https://en.ustc.edu.cn/" target="_blank" rel="noreferrer noopener">University of Science and Technology</a> of China. 



His team's record-shattering achievement completely disrupts our understanding of quantum mechanics and opens up exciting possibilities for future technologies.



Creating such states isn't new, but keeping them stable has been a monumental challenge. 



Usually, these superpositions collapse into a single state almost as soon as they form. Lu and his colleagues decided to tackle this problem head-on.



<h2 class="wp-block-heading" id="h-how-did-they-pull-this-off">How did they pull this off?</h2>



They took about 10,000 atoms of ytterbium -- a <a href="https://www.earth.com/news/u-s-coal-ash-holds-tons-of-rare-earth-elements-worth-8-4-billion/" target="_blank" rel="noreferrer noopener">rare earth element</a> -- and cooled them down to a few thousandths of a degree above absolute zero. 



Then, they used lasers to trap the atoms with electromagnetic forces. 



Under these ultra-cold conditions, they could control the atoms' quantum states with incredible precision. Each atom was placed into a superposition of two states with very different spins.



Now, you'd expect environmental disturbances to ruin the party pretty quickly, causing the atoms to settle into a single spin state in milliseconds or seconds. But here's where the magic happens. 



The researchers fine-tuned their lasers just right, allowing the cat states to last an unprecedented 1,400 seconds -- that's 23 minutes, or about the time it takes to watch your favorite sitcom without commercials.



Barry Sanders from the <a href="https://www.ucalgary.ca/" target="_blank" rel="noreferrer noopener">University of Calgary</a> was impressed by the feat. He told New Scientist, “It's a big deal because they're making this beautiful cat state in an atomic system and it's stable.”



<h2 class="wp-block-heading" id="h-why-quantum-cat-states-matter">Why quantum cat states matter</h2>



Why should you care about this? For starters, these long-lasting cat states are incredibly sensitive to their environment. 



Think of them like ultra-sensitive probes that can detect the slightest changes around them. 



Sanders explained, “A probe gets jiggled and pushed and nudged and prodded, and then by seeing what happens, you learn about the things that interact with it.”



The researchers showed that their cat state's sensitivity for measuring magnetic fields is already nearing the fundamental limits set by <a href="https://www.earth.com/news/quantum-impossibility-made-possible-using-exotic-mathematics/" target="_blank" rel="noreferrer noopener">quantum mechanics</a>. 



Because it sticks around for so long, the cat state isn't just a one-trick pony; it can gather data over extended periods, capturing both quick blips and slow changes.



<h2 class="wp-block-heading" id="h-real-world-applications">Real world applications</h2>



This could have big implications for studying subtle magnetic forces or even uncovering exotic effects in fundamental physics. 



Imagine being able to detect minute changes in <a href="https://www.earth.com/news/plasma-can-bend-magnetic-fields-into-unique-shapes/" target="_blank" rel="noreferrer noopener">magnetic fields</a> that were previously beyond our reach.



Looking to the future, these cat states might find a home in quantum information processing. 



They could act as super-stable memory units, <a href="https://www.earth.com/news/transmitting-quantum-information-using-electron-spin/" target="_blank" rel="noreferrer noopener">storing extra information</a> and helping devices like quantum computers correct errors on the fly.



It's not every day that we see such a leap in quantum stability. This achievement <a href="https://www.earth.com/news/impossibility-paradox-calculating-incalculable-quantum-realm-particles/" target="_blank" rel="noreferrer noopener">pushes the boundaries of what's possible</a> and brings us closer to practical quantum technologies. It's like unlocking a new level in a game we thought we had figured out.



<h2 class="wp-block-heading" id="h-what-happens-next">What happens next?</h2>



To sum it all up, this achievement by Zheng-Tian Lu and his team is a game-changer in quantum physics. 



By keeping a quantum "cat state" alive for 23 minutes, they've shattered previous records and opened up a <a href="https://www.earth.com/news/how-quantum-revolution-will-impact-all-aspects-of-society/" target="_blank" rel="noreferrer noopener">whole new world of possibilities</a>. 



Their clever use of ytterbium atoms and precise laser tuning demonstrates incredible control over quantum states.



It's exciting to think about where this could lead us. From super-sensitive probes that can detect the tiniest magnetic forces to more stable <a href="https://www.earth.com/news/code-breaking-encryption-quantum-computers-takes-big-step-closer-to-becoming-reality/" target="_blank" rel="noreferrer noopener">quantum computers</a> that can fix their own errors, the implications are huge. 



While we might not see immediate changes in our daily lives, this kind of research pushes the boundaries of what's possible and gets us one step closer to the next big leap in technology



The full study was published in the journal <a href="https://arxiv.org/abs/2410.09331v1" target="_blank" rel="noreferrer noopener">arXiv</a>.



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"Quantum cat" survives in superposition for a record-shattering 23 minutes

Quantum states, such as quantum superposition "cat states," are notorious...

For decades, scientists have been grappling with what is considered to be the most fundamental question about the cosmos: How fast is our universe expanding? 



The rate of expansion influences everything from how galaxies form to how they might one day drift apart.



Determining the expansion rate of the universe, a number called the "Hubble constant," shapes our entire understanding of the cosmos, its age, and its ultimate fate.



<h2 class="wp-block-heading" id="h-hubble-tension-expansion-conundrum">"Hubble tension" expansion conundrum</h2>



Unfortunately, though many brilliant minds have dedicated their lives to finding the answer to this riddle, all who have tried thus far have failed, running repeatedly into a brick wall that has come to be known as the "Hubble tension."



Adam Riess, a physicist at <a href="https://www.jhu.edu/" target="_blank" rel="noreferrer noopener">Johns Hopkins University</a> in Baltimore, has been at the forefront of this debate. "With measurement errors negated, what remains is the real and exciting possibility that we have misunderstood the universe," Riess admitted.



Riess, who won a Nobel Prize for discovering that the universe's expansion is accelerating due to dark energy, has been working tirelessly to resolve what's known as the Hubble Tension.



<h2 class="wp-block-heading" id="h-why-the-hubble-constant-matters">Why the Hubble constant matters</h2>



But before diving deeper, let's consider why the expansion rate -- called the Hubble constant -- is so crucial. 



Named after Edwin Hubble, who first observed that galaxies are moving away from us, this constant helps us map out the history and future of everything we see in the night sky. 



Determining it with precision has been a major goal of astronomers for decades.



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2024/11/hubble-constant_3-steps_illustration_nasa_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2024/11/hubble-constant_3-steps_illustration_nasa_1s.webp" alt="This illustration shows the three basic steps astronomers use to calculate how fast the universe expands over time, a value called the Hubble constant. All the steps involve building a strong &quot;cosmic distance ladder,&quot; by starting with measuring accurate distances to nearby galaxies and then moving to galaxies farther and farther away. Credit: NASA" class="wp-image-1951709"/></a><figcaption class="wp-element-caption">This illustration shows the three basic steps astronomers use to calculate how fast the universe expands over time, a value called the Hubble constant. All the steps involve building a strong "cosmic distance ladder," by starting with measuring accurate distances to nearby galaxies and then moving to galaxies farther and farther away. Credit: NASA</figcaption></figure>



When the <a href="https://hubblesite.org/home" target="_blank" rel="noreferrer noopener">Hubble Space Telescope</a> was launched in 1990, one of its main objectives was to pin down the universe's expansion rate. 



Before Hubble, estimates of the universe's age ranged wildly from 10 to 20 billion years -- a huge uncertainty. 



Thanks to Hubble's observations of <a href="https://www.earth.com/news/expansion-rate-of-the-universe-confirmed-by-jwst/" target="_blank" rel="noreferrer noopener">Cepheid variable stars</a> -- stars that pulsate at regular intervals and serve as cosmic mileposts -- we now have a more precise age of about 13.8 billion years.



<h2 class="wp-block-heading" id="h-webb-telescope-to-the-rescue">Webb telescope to the rescue?</h2>



Some scientists wondered if the discrepancies in measurements were due to errors in Hubble's data. Maybe, they thought, the way Hubble measured distances had some hidden flaws. 



Then came the James Webb Space Telescope (<a href="https://science.nasa.gov/mission/webb/" target="_blank" rel="noreferrer noopener">Webb</a>), launched to great fanfare as the successor to Hubble. Webb's infrared observations of Cepheids matched Hubble's optical data perfectly. 



"Combining Webb and Hubble gives us the best of both worlds. We find that the Hubble measurements remain reliable as we climb farther along the cosmic distance ladder," Riess explained.



<h2 class="wp-block-heading" id="h-hubble-vs-webb-vs-expansion">Hubble vs. Webb vs. expansion</h2>



Despite the new data, the tension between measurements remains. The Hubble and Webb telescopes confirm one universe expansion rate, based on observations of the local universe.



Meanwhile, observations from the early universe, like those from the Planck satellite's mapping of the cosmic microwave background radiation, suggest another. 



This leaves cosmologists scratching their heads. Is there something about the <a href="https://www.earth.com/news/universe-expansion-rate-dark-energy-measured-11-billion-years-ago/" target="_blank" rel="noreferrer noopener">fabric of space</a> we don't yet understand? Does resolving this discrepancy require new physics, or is there another explanation?



<h2 class="wp-block-heading" id="h-brenda-frye-tackles-hubble-and-expansion">Brenda Frye tackles Hubble and expansion</h2>



In October 2024, <a href="https://blogs.nasa.gov/webb/2024/10/01/webb-researchers-discover-lensed-supernova-confirm-hubble-tension/" target="_blank" rel="noreferrer noopener">as reported by NASA</a>, Brenda Frye from the <a href="https://www.arizona.edu/" target="_blank" rel="noreferrer noopener">University of Arizona</a> and an international team took a different approach. 



They used <a href="https://www.earth.com/news/webb-telescope-finds-a-second-lensed-supernova-in-a-distant-galaxy/" target="_blank" rel="noreferrer noopener">gravitationally lensed supernovae</a> to measure the Hubble constant -- a method independent of previous techniques. 



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2024/11/hubble-constant_galaxy-cluster-G165_supernova-H0pe_gravitational-lensing_jwst_UArizona_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2024/11/hubble-constant_galaxy-cluster-G165_supernova-H0pe_gravitational-lensing_jwst_UArizona_1s.webp" alt="NASA’s James Webb Space Telescope’s NIRCam (Near-Infrared Camera) image of the galaxy cluster PLCK G165.7+67.0, also known as G165, on the left shows the magnifying effect a foreground cluster can have on the distant universe beyond. The foreground cluster is 3.6 billion light-years away from Earth. The zoomed region on the right shows supernova H0pe triply imaged (labeled with white dashed circles) due to gravitational lensing. Credit: NASA, ESA, CSA, STScI, B. Frye (University of Arizona)" class="wp-image-1951711"/></a><figcaption class="wp-element-caption">NASA’s James Webb Space Telescope’s NIRCam (Near-Infrared Camera) image of the galaxy cluster PLCK G165.7+67.0, also known as G165, on the left shows the magnifying effect a foreground cluster can have on the distant universe beyond. The foreground cluster is 3.6 billion light-years away from Earth. The zoomed region on the right shows supernova H0pe triply imaged (labeled with white dashed circles) due to gravitational lensing. Credit: NASA, ESA, CSA, STScI, B. Frye (University of Arizona)</figcaption></figure>



While observing a densely populated cluster of galaxies, they noticed something unusual. "What are those three dots that weren’t there before? Could that be a supernova?" the team wondered. 



It turned out to be a <a href="https://www.earth.com/news/webb-travels-back-in-time-to-better-understand-supernovae-science/" target="_blank" rel="noreferrer noopener">Type Ia supernova</a>, an explosion of a <a href="https://www.earth.com/news/white-dwarf-stars-may-be-billions-of-years-older-than-estimated/" target="_blank" rel="noreferrer noopener">white dwarf star</a>, magnified and split into multiple images by the gravitational lensing effect of the intervening galaxy cluster.



<h2 class="wp-block-heading" id="h-what-is-gravitational-lensing">What is gravitational lensing?</h2>



<a href="https://www.earth.com/news/rare-carousel-lens-galaxy-alignment-reveals-dark-matter-secrets/" target="_blank" rel="noreferrer noopener">Gravitational lensing</a> is important to this experiment. The lens, consisting of a cluster of galaxies situated between the supernova and us, bends the supernova's light into multiple images. 



This effect not only magnifies the supernova but also allows scientists to measure the time delays between the images, providing another way to calculate the Hubble constant.



Their analyses confirmed that these dots corresponded to an exploding star with rare qualities. 



The team's work provided a Hubble constant value of 75.4 kilometers per second per megaparsec, plus 8.1 or minus 5.5. For context, one megaparsec is about 3.26 million light-years. 



"Our team’s results are impactful: The Hubble constant value matches other measurements in the local universe, and is somewhat in tension with values obtained when the universe was young," Frye concluded.



Another strikeout... add Brenda Frye to the long list of brilliant minds still probing the universe for an answer to Hubble tension.



<h2 class="wp-block-heading" id="h-this-is-getting-sad-now-what">This is getting sad, now what?</h2>



So, where does this leave us? 



The Hubble Tension isn't going away. It might be telling us that there's new physics waiting to be discovered. 



Perhaps our understanding of <a href="https://www.earth.com/news/dark-energy-could-explain-the-rapid-expansion-of-the-early-universe/" target="_blank" rel="noreferrer noopener">dark energy</a>, dark matter, or other fundamental forces needs to be revised. 



"We need to find out if we are missing something on how to connect the beginning of the universe and the present day," Riess pointed out. 



It's possible that new theories or modifications to existing ones could bridge the gap.



<h2 class="wp-block-heading" id="h-shaking-things-up-with-new-theories">Shaking things up with new theories</h2>



Could the solution lie in something entirely unexpected? Perhaps there's a <a href="https://www.earth.com/news/dark-matter-may-consist-of-particles-that-travel-faster-than-light/" target="_blank" rel="noreferrer noopener">new particle or force</a> that affects the expansion rate. Or maybe the nature of dark energy changes over time. 



Some theories even propose the existence of extra dimensions or modifications to gravity at large scales. It's also worth considering that the universe might not be uniform in all directions. 



If there are variations in the density of matter and energy across vast distances, this could affect expansion rates in ways we haven't fully accounted for. 



Maybe everyone is completely off base and <a href="https://www.earth.com/news/study-dark-matter-does-not-exist-and-the-universe-is-27-billion-years-old/" target="_blank" rel="noreferrer noopener">dark matter doesn't even exist</a>? Or maybe we're looking in the wrong place -- what if the answers can be found by looking for <a href="https://www.earth.com/news/scientists-are-now-searching-for-dark-matter-inside-old-earth-rocks-minerals-crystals/" target="_blank" rel="noreferrer noopener">dark matter in rocks on Earth</a>?



One thing's for sure: the cosmos isn't giving up its secrets easily. But that's part of the thrill of science. Every answer leads to new questions.



<h2 class="wp-block-heading" id="h-hubble-constant-hubble-tension-mysterious-universe">Hubble constant, Hubble tension, mysterious universe</h2>



In the end, the universe is reminding us that there's still so much we don't know. The quest to figure out how fast our universe is expanding has led to some fascinating discoveries and even more intriguing questions. 



Scientists like Adam Riess and Brenda Frye have used powerful tools like the Hubble and James Webb Space Telescopes to measure the Hubble constant with increasing precision. 



Their efforts confirm that the local universe is expanding at a certain rate, but this doesn't quite line up with measurements from the early universe.



This mismatch, known as the Hubble Tension, suggests there might be something we’re missing in our understanding of the cosmos. Maybe there are new physics to uncover, or perhaps our current models need some tweaking. 



What's clear is that the universe isn't giving up its secrets easily, and that keeps things exciting for astronomers and physicists alike.



As we look ahead, upcoming missions like NASA's <a href="https://roman.gsfc.nasa.gov/" target="_blank" rel="noreferrer noopener">Nancy Grace Roman Space Telescope</a> and ESA's <a href="https://www.esa.int/Science_Exploration/Space_Science/Euclid" target="_blank" rel="noreferrer noopener">Euclid mission</a> offer hope for new insights. Until then, we can marvel at the fact that we're part of an ever-expanding universe that's still full of surprises.



The full study was published in the <a href="https://iopscience.iop.org/article/10.3847/2041-8213/ad1ddd" target="_blank" rel="noreferrer noopener">Astrophysical Journal Letters</a>.



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Discovery: What we think we know about the universe is very wrong

For decades, scientists have been grappling with what is considered...

We often associate wealth with a higher level of biodiversity. This notion, referred to as the "luxury effect," seems to suggest that only affluent communities can enjoy diverse ecosystems.



However, a new study offers a more nuanced view, empowering all communities to work towards cultivating biodiversity, regardless of their financial status.



<h2 class="wp-block-heading" id="h-connection-between-biodiversity-and-wealth">Connection between biodiversity and wealth</h2>



"A positive correlation between wealth and biodiversity within cities is a commonly documented phenomenon in urban ecology that has come to be labeled as the 'luxury effect,'" wrote the study authors.



"We contend that both this language and this framing restrict our understanding of how sociopolitical power dynamics influence biodiversity within and across cities."



The researchers explained that the connection between biodiversity and wealth extends beyond just their correlation.



Madhusudan Katti, an associate professor at <a href="https://www.ncsu.edu/" target="_blank" rel="noreferrer noopener">North Carolina State University</a> (NC State), noted that biodiversity is not a luxury - it is something we can work to nurture in cities



"Rather than just rely on the correlation of wealth and biodiversity, we wanted to understand the many ways that biodiversity intersects with different social pressures and systems," explained Professor Katti.



<h2 class="wp-block-heading" id="h-understanding-the-role-of-cities">Understanding the role of cities</h2>



To unravel this relationship, the researchers started with a meticulous analysis of <a href="https://www.earth.com/news/landscapes-with-a-mix-of-habitats-are-biodiversity-hotspots/" target="_blank" rel="noreferrer noopener">biodiverse landscapes</a>. The goal was to identify the common characteristics of these areas and decipher the social structures that enabled them.



The team utilized a unique approach called the social-ecological framework, outlining how <a href="https://www.earth.com/news/humans-have-shaped-plant-biodiversity-for-thousands-of-years/" target="_blank" rel="noreferrer noopener">human actions shape nature</a> within a social context.



This framework acknowledges that societal actors play a significant role in land use and management decisions. 



"Someone decides how land will be used, whether it’s a city deciding where a park is going to go or zoning for industry," said Professor Katti.



"Then you also have individuals in their backyards deciding what they want to do with it, whether they want a lawn, a pollinator-friendly garden, or something else.”



<h2 class="wp-block-heading" id="h-urban-biodiversity-and-the-luxury-effect">Urban biodiversity and the luxury effect </h2>



As part of their research, the scientists introduced a new framework, the POSE approach. This model focuses on four factors - power, objectives, social/ecological context, and effort (POSE) - which together shape what is termed the "luxury effect."



For instance, homeowners with higher income may have greater control over landscape use compared to apartment dwellers. 



However, the POSE framework empowers communities with fewer resources to prioritize things within their control, such as collective organizing to boost effort.



Professor Katti is optimistic about the impact of the POSE framework. He believes that it will inspire collective action towards healthier landscapes.



The insightful research is a reminder that everyone has a part to play in <a href="https://www.earth.com/news/international-day-for-biological-diversity-from-agreement-to-action/" target="_blank" rel="noreferrer noopener">nurturing biodiversity</a>.



“We want people to understand that they can influence the landscape around them even without a lot of money. This is what community groups have been doing for a long time: they organize to overcome the handicap of wealth through effort," said Professor Katti.



"Our paper is a call to action. Biodiversity is achievable, and people have the power to create it together.”



<h2 class="wp-block-heading" id="h-empowering-communities-with-collective-action">Empowering communities with collective action</h2>



The study reveals that biodiversity can thrive in any community when collective action and creative solutions are prioritized.



Individuals and neighborhoods can take small but impactful steps, such as <a href="https://www.earth.com/news/urban-forests-benefit-from-diverse-native-tree-species/" target="_blank" rel="noreferrer noopener">planting native species</a>, reducing pesticide use, or advocating for shared green spaces.



These actions, when coordinated, create a ripple effect that enhances biodiversity on a larger scale.



Collaboration within communities amplifies these efforts, demonstrating that collective action can overcome economic limitations.



By working together, people can reclaim urban spaces for nature, transforming vacant lots, rooftops, and backyards into thriving habitats that support local wildlife and enrich the quality of life for residents.



<h2 class="wp-block-heading" id="h-biodiversity-in-urban-landscapes">Biodiversity in urban landscapes</h2>



Urban planning has a critical role in the shaping of ecosystems and provides an opportunity to bring biodiversity into the fabric of cities.



Simple yet effective design strategies, such as green walls, urban forests, and pollinator pathways, can <a href="https://www.earth.com/news/restoring-wildlife-habitats-may-prevent-the-next-pandemic/" target="_blank" rel="noreferrer noopener">restore habitats</a> and reconnect fragmented ecosystems.



The POSE framework provides&nbsp;a practical approach for&nbsp;city planners and policymakers to&nbsp;evaluate&nbsp;the impact of their decisions&nbsp;on&nbsp;biodiversity.



This&nbsp;vision&nbsp;is one of&nbsp;aligning land use policies with ecological goals and engaging community stakeholders, which will help&nbsp;cities&nbsp;to&nbsp;balance development with conservation.



The full study was published in the journal <a href="https://esajournals.onlinelibrary.wiley.com/doi/10.1002/ecs2.70049" target="_blank" rel="noreferrer noopener">Ecosystems</a>.



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Urban biodiversity is not a luxury - it is attainable for everyone

We often associate wealth with a higher level of biodiversity....

Thousands of years ago, a roar echoed through the Highland caves of Scotland. It was the roar of bears. But, were these the average brown bears or something more "polar" in nature? 



Using advanced methods to analyze Scottish bear fossils, researchers from the University of Aberdeen and National Museums Scotland have made a fascinating discovery. 



<h2 class="wp-block-heading" id="h-analyzing-the-bear-fossils">Analyzing the bear fossils </h2>



The study was led by Professor Kate Britton, an expert known for her insightful approach to ancient fauna.



The experts reevaluated <a href="https://www.earth.com/news/water-bear-tardigrade-fossils-reveal-how-they-survived-several-mass-extinction-events/" target="_blank" rel="noreferrer noopener">fossils</a> collected from the Inchnadamph "Bone Caves" in Sutherland. What they found was evidence of fish in the diet of bears that had been identified as brown bears.



Working closely with masters student Holland Taekema from the <a href="https://www.ed.ac.uk" target="_blank" rel="noreferrer noopener">University of Edinburgh</a>, the team used a technique known as "stable isotope data" to dig deeper into the diets of the fossilized bears.



The evidence they unearthed pointed to a marine diet dating back to 30,000 to 50,000 years ago. This means that the bears were feasting heavily on seafood long before human footprints graced Scottish lands.



<h2 class="wp-block-heading" id="h-could-the-fossils-belong-to-polar-bears">Could the fossils belong to polar bears?</h2>



As exciting as it sounds, this revelation required a fair bit of head-scratching. After all, it's a hard shift from the grisly diet of modern brown bears.



The research suggests an intriguing possibility - could these have been polar bears frolicking in Scottish terrain amidst the Last Ice Age?



"We have identified several samples which stick out like a sore thumb both from the diets of other <a href="https://www.earth.com/news/coelacanth-ngamugawi-wirngarri-new-species-living-fossil-fish-survived-over-400-million-years/" target="_blank" rel="noreferrer noopener">bears</a> living in Scotland thousands of years ago and from what we'd expect of today's brown bears. These bears appear to have lived almost exclusively on seafood," said Professor Britton.



<h2 class="wp-block-heading" id="h-a-polar-perspective">A polar perspective</h2>



Indeed, the frosty north is the only homeland we associate with polar bears today, but our researchers remind us that the Last Glacial Maximum brought down the seasonal sea ice limit in the North Atlantic, allowing these majestic creatures to roam further south than their current <a href="https://www.earth.com/news/how-life-and-environment-co-evolved-over-500-million-years/" target="_blank" rel="noreferrer noopener">territories</a>.



A similar theory was hinted at in the 1990s, revolving around a bear skull with polar bear-like features. However, lack of further evidence and questions about the skull's radiocarbon dating have put a pause on accepting this interesting possibility.



Dr. Andrew Kitchener is the Principal Curator of Vertebrates at National Museums Scotland. 



"As we know that polar bears and brown bears can successfully interbreed today where their ranges overlap, it presents interesting questions about the ancestry of bears that later roamed our islands," noted Dr. Kitchener.



<h2 class="wp-block-heading" id="h-the-ice-age-connection">The Ice Age connection</h2>



To shed light on the intriguing genetic links between modern polar bears and Ice Age European brown bears, the research team is embarking on an ambitious journey. 



By analyzing the DNA of brown bears from different regions and comparing it to the genetic makeup of present-day polar bears, they aim to uncover the ancestral ties that bind these species together. 



This comprehensive genetic analysis, coupled with the isotopic evidence from the bone caves, may hold the key to unraveling the mysteries surrounding the enigmatic fossil bears.



<h2 class="wp-block-heading" id="h-preserving-the-past">Preserving the past</h2>



The bears fossils, now meticulously curated by the experts at National Museums Scotland, will continue to serve as invaluable resources for ongoing research.



The team plans to go deeper into the fossil record, exploring additional bone caves and collecting further samples for analysis. 



By employing state-of-the-art techniques and collaborating with multidisciplinary experts, they hope to unlock new insights and unveil more secrets about the ancient bears that once roamed our lands. 



<h2 class="wp-block-heading" id="h-future-research-directions">Future research directions </h2>



The plot only thickens as the team sets out to further explore the mystery. 



The researchers plan to unearth the connections between brown bear DNA in modern polar bears and polar bear DNA in Ice Age European brown bears. 



The challenge is to understand how this genetic data links to the isotopic evidence from the bone caves.



The <a href="https://www.earth.com/news/gordonia-traquairi-pig-like-creature-discovered-roamed-earth-250-million-years-ago/" target="_blank" rel="noreferrer noopener">fossil</a> bears will be the subject of ongoing research by a newly-appointed research fellow, Dr. Alicia Sanz Royo, at the <a href="https://www.abdn.ac.uk" target="_blank" rel="noreferrer noopener">University of Aberdeen</a> in 2025.



The study is published in the journal <a href="https://bioone.org/journals/annales-zoologici-fennici/volume-61/issue-1/086.061.0124/The-bears-of-Scotland/10.5735/086.061.0124.short" target="_blank" rel="noreferrer noopener">Annales Zoologici Fennici</a>.



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Were polar bears feasting on fish in Scotland 30,000 years ago?

Thousands of years ago, a roar echoed through the Highland...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Nushagak Bay, a large estuary in southwest Alaska. Nushagak runs mainly north to south and exits in Bristol Bay, a large body of water in the Bering Sea.



"The bay is primarily fed by the Nushagak River, which begins in the Alaska Range and flows southwest approximately 450 km. The bay is also fed by several additional rivers including the Wood, Igushik, Snake and Weary rivers," says ESA.



"The dark colors of the Nushagak River are most likely due to tannins or lignins (chemical substances found in plants). Tannins and lignins from roots, leaves, seeds, bark and soil can leach into the water and give it a brown or even black colour. The sediments then flow southwards where it is mixed with the bluer waters of the bay."



Video/ Image Credit: ESA



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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Nushagak Bay in southwest Alaska

[sendtonews key="0ynNMYkMKa-2340414-12187" type="single"] Today’s Video of the Day from the...

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Today's Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> (ACS) reveals that proteins on flu viruses are actually flexible, tilting and waving in a “breath-like” motion. According to the experts, these proteins could be used to better defend against the flu.



"The main antigenic targets of influenza virus are two surface glycoproteins, hemagglutinin (HA) and neuraminidase (NA). Whereas the structural and dynamical properties of both glycoproteins have been studied previously, the understanding of their plasticity in the whole-virion context is fragmented," wrote the researchers.



To investigate, the team conducted detailed simulations of the influenza A H1N1 virion, or the swine flu. The experts concluded that the visualizations show many new vulnerable states of flu viruses, which could improve future vaccines and antiviral drugs.



Video/ Image Credit: American Chemical Society&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Flu viruses are more flexible than expected

[sendtonews key="G9bUoxcjr4-2511624-12187" type="single"] Today's Video of the Day from the...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Lake Trasimeno, which is located west of Perugia in central Italy. It is the fourth largest lake in the country. While Trasimeno’s water level varies, it has a maximum depth of approximately six meters.&nbsp;



"In this Copernicus Sentinel-2 image, captured on 6 August 2022, the lake’s emerald green colour is likely due to the presence of phytoplankton. Streaks in the water, particularly visible in the west, indicate the presence of soil and sediments which have been stirred up by winds. Dark colored waters in the southern part of the lake indicate a presence of submerged and floating macrophytes (aquatic plants) as well as algae," says ESA.



"Surrounded by hills on three sides, Trasimeno is subject to heavy storms created by winds, especially from the north and west. There are three islets in the lake: Maggiore, Minore and Polvese (the largest). The lake’s shores are sparsely inhabited with only two popular villages: Castiglione del Lago and Passignano sul Trasimeno."



"Italy is experiencing its worst drought in 70 years which has affected drinking water supplies, hydroelectric power and agricultural production. High temperatures, hot winds and lack of rainfall are the main causes of drought in the Umbrian region which saw Lake Trasimeno’s drop 1.3 m, reaching the limit of the hydrometric zero in July 2022."



Video/Image Credit: ESA&nbsp;



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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Lake Trasimeno in Central Italy

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Today's Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> describes a new self-powered nanosensor that can instantly detect mercury contamination with the tap of a finger.&nbsp;



The oxidized form of mercury can be harmful when it is ingested through contaminated water or food. This makes it necessary for experts to develop sensors that can quickly and accurately detect the presence of mercury.&nbsp;



Zong-Hong Lin and colleagues have now created a triboelectric nanosensor (TENS) that can detect mercury by simply by touching a sample. According to the researchers, their TENS could serve as the basis for similar devices to safely and remotely monitor other pollutants.



Video Credit: American Chemical Society&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Detecting mercury contamination with the tap of a finger

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Kainji Lake, a reservoir on the Niger River.



In 1968, Kainji Lake was created by the construction of the Kainji Dam. The Niger River, the third longest in Africa, enters the lake in the north.&nbsp;



According to <a href="https://www.earth.com/news/rivers-in-the-american-west-are-a-lifesaving-resource-for-birds/">ESA</a>, the creation of the lake submerged Foge Island and the town of Bussa and permanently flooded other riverine settlements, leaving around 50,000 people displaced.&nbsp;



Large parts of Foge Island are temporarily exposed during low water tides, and the land is often used by migrating fishermen. Kainji Dam is a dam across the Niger River in Niger State of Central Nigeria. 



Wild mammals occur at relatively low densities due to illegal hunting. Lake Kainji has suffered a dramatic decline as a fishery due to the high numbers of artisanal and subsistence fisherfolk using the lake. It has been suggested that a period of closure, together with controlled fishing rights may help improve fish stocks.



Kainji Lake National Park is the oldest of its kind in Nigeria. The park contains three distinct areas: a part of the Kainji Lake, the Borgu Game Reserve to the west of the lake, and the Zugurma Game Reserve to the southeast. The park is home to around 65 mammal species, 350 bird species, and 30 species of reptiles and amphibians. 



Video/ Image Credit: European Space Agency&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Kainji Lake in north central Nigeria

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Today’s Video of the Day from <a href="https://www.igb.illinois.edu/">Carl R. Woese Institute for Genomic Biology</a> reveals how scientists can modify common crops like soybean, rice, and wheat to protect them from heat stress.



“We need to double crop production by 2050 to feed a growing global population, and not only are we not on track to do that, but climate change is further complicating things,” said Amanda Cavanagh, a lecturer at the University of Essex. 



The study is part of Realizing Increased Photosynthetic Efficiency (RIPE), an international research project that aims to develop food crops that turn the sun’s energy into food more efficiently.



“Using an engineering approach we designed multiple alternative metabolic pathways to photorespiration. Testing them in the field showed increases in productivity which led Amanda to significantly move the project forward by showing our engineered plants can withstand pretty extreme temperature stress,” said study co-author and RIPE researcher Paul South.&nbsp;



“As the climate changes and temperature stresses increase the pressure on our global food supply, farmers will need every tool available including engineering approaches like the synthetic biology used here to maintain safe and productive harvests.”



The experts tested plants modified to have more efficient photorespiration to see if they were better adapted to warmer temperatures.&nbsp;



The team found that the engineered plants produced 26 percent more biomass than the wild-type plants exposed to the same temperatures, and had 15 percent less yield loss under the higher temperatures.



Video Credit: Amanda Nguyen/University of Illinois



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Designing crops that can beat the heat

[sendtonews key="QGPzYnXEtN-1712599-12187" type="single"] Today’s Video of the Day from Carl...