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. 



“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>.&nbsp;



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.&nbsp;Some glaciers are retreating at unprecedented rates, indicating accelerating climate impacts.



The image was captured on August 4, 2024 by the Landsat 8 satellite.



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 NASA Earth Observatory features the Costa Atlántica Reserve stretching along the Atlantic coast in Argentina.



“At the far southern reaches of South America, a stretch of tidal flats, shoals, and beaches serves as a refuge for migratory shorebirds and copious aquatic life,” said <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA</a>.



“The Costa Atlántica Reserve in Argentina extends for 220 kilometers (140 miles) along the eastern shore of Tierra del Fuego. The area was designated a Ramsar site in 1995 and a provincial nature reserve in 1998." 



According to NASA, the reserve is the southernmost site both on the Ramsar list and in the Western Hemisphere Shorebird Reserve Network.



<h2 class="wp-block-heading" id="h-significance-of-the-costa-atlantica-reserve">Significance of the Costa Atlántica Reserve</h2>



The Costa Atlántica Reserve is an important conservation site that signifies Argentina's commitment to preserving its rich <a href="https://www.earth.com/news/human-induced-changes-in-ocean-salinity-threaten-biodiversity-and-marine-ecosystems/" target="_blank" rel="noreferrer noopener">coastal biodiversity</a>.&nbsp;



This vast expanse of protected area serves as a sanctuary for many species, ranging from migratory birds to marine mammals and diverse plant life.



“Tidal habitats along the coast support some 135 species of birds, while crustaceans, mollusks, fish, and cetaceans feed in the productive coastal waters,” said NASA.&nbsp;



“The topography inland of Costa Atlántica, stretching into Chile to the west, is blanketed in shrubs and grassland vegetation adapted to dry conditions - part of a semiarid ecosystem known as the Fuegian steppe.”



<h2 class="wp-block-heading" id="h-maintaining-ecological-balance-nbsp">Maintaining ecological balance&nbsp;</h2>



Established to safeguard the delicate ecosystems of dunes, estuaries, and <a href="https://www.earth.com/news/coastal-lagoons-have-high-loads-of-microplastics/" target="_blank" rel="noreferrer noopener">coastal lagoons</a>, the reserve plays a crucial role in maintaining ecological balance.&nbsp;



The Costa Atlántica Reserve provides critical habitats for numerous threatened species, including the <a href="https://www.earth.com/news/southern-right-whales-have-shifted-their-foraging-grounds/">Southern Right Whale</a>, which finds refuge in these waters during its breeding season. 



The reserve’s sheltered bays and nutrient-rich waters create an ideal environment for mothers to nurse their calves before embarking on long migrations. 



In addition to whales, the reserve supports populations of sea lions and Magellanic penguins. Its protection is vital for the long-term survival of these species in the face of climate change and human activity.



<h2 class="wp-block-heading" id="h-costa-atlantica-reserve-a-living-laboratory-nbsp">Costa Atlántica Reserve: A living laboratory&nbsp;</h2>



The Costa Atlántica Reserve is not only a refuge for wildlife but also a living laboratory for scientific research. 



Conservationists and researchers work within its bounds to monitor ecosystems, study species behaviors, and develop strategies for sustainable management. 



This ongoing research is pivotal in understanding the impacts of climate change on <a href="https://www.earth.com/news/coastal-river-deltas-face-major-threats-beyond-climate-change/" target="_blank" rel="noreferrer noopener">coastal environments</a> and in devising measures to mitigate these effects.



Furthermore, the reserve illustrates the importance of community involvement in conservation efforts. Local communities are engaged in sustainable tourism and educational programs.&nbsp;



Through <a href="https://www.earth.com/news/how-bird-photographers-improve-nesting-success/" target="_blank" rel="noreferrer noopener">eco-tourism</a> initiatives, visitors can experience the natural beauty of the reserve while contributing to its preservation.



<h2 class="wp-block-heading" id="h-tierra-del-fuego-archipelago">Tierra del Fuego archipelago</h2>



According to NASA, the broader landscape of the Tierra del Fuego archipelago was shaped by glaciers.&nbsp;



“Ice advanced over the mountains and lowlands during cold climatic periods between the mid-Pleistocene, about 1 million years ago, and the Last Glacial Maximum, about 20,000 years ago. San Sebastián Bay formed in a tectonic depression that was deepened by glacial erosion," noted NASA.&nbsp;



“Further evidence of glaciation, including hummocky moraines and fields of glacial erratics, appears around the bay, though it is too small to be visible in this image.”



“Partially enclosed by a long, sandy peninsula, San Sebastián Bay attracts copious migratory birds, some of which shuttle seasonally between the Northern and Southern Hemispheres.”



“Large populations of the Hudsonian godwit, white-rumped sandpiper, and other long-distance flyers congregate in the vast intertidal zones. This part of the reserve, however, is vulnerable to the impact of oil and gas extraction from onshore and offshore deposits.”



The image was captured on February 20, 2024 by the <a href="https://landsat.gsfc.nasa.gov/satellites/landsat-9/landsat-9-instruments/oli-2-design/" target="_blank" rel="noreferrer noopener">OLI-2</a> (Operational Land Imager-2) on Landsat 9.



Image Credit: NASA Earth Observatory&nbsp;



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Costa Atlántica Reserve in Argentina

Today's Image of the Day from NASA Earth Observatory features an explosive eruption of Mount Etna, the most active volcano in Europe. The photo was captured on February 13 by the OLI (Operational Land Imager) on the Landsat 8 satellite.



<a href="https://earthobservatory.nasa.gov/images/153962/river-of-fire-on-mount-etna" target="_blank" rel="noreferrer noopener">NASA</a> noted that the natural-color scene is overlaid with an infrared signal to distinguish the lava’s heat signature on the mountain's snowy slopes.



<h2 class="wp-block-heading" id="h-signs-of-unrest">Signs of unrest</h2>



“On February 8, 2025, Italy’s National Institute of Geophysics and Volcanology (INGV) reported that Mount Etna had begun exhibiting ‘signs of unrest above its background level,’”&nbsp;said NASA.



“That’s unsurprising for the frequently unruly Sicilian peak, one of the most active stratovolcanoes in the world. But the fiery explosions, disruptive ash clouds, and long lava flows that ensued stood out as being unusually spectacular to many Etna watchers.”



<h2 class="wp-block-heading" id="h-intensifying-eruptions-on-mount-etna">Intensifying eruptions on Mount Etna </h2>



The activity intensified on February 10th, with lava flowing from the Bocca Nuova crater at an altitude of approximately 3,000 meters above sea level.&nbsp;



According to news reports, the eruption created a striking visual as molten lava traversed the snow-covered slopes, producing rivers of lava up to 3 kilometers long and emitting ash plumes visible from several kilometers away.



The <a href="https://www.earth.com/news/new-research-enhances-predictions-on-volcanic-eruptions/" target="_blank" rel="noreferrer noopener">volcanic activity</a> attracted thousands of tourists eager to witness the spectacle. However, the influx of visitors led to traffic congestion, obstructing emergency services and prompting warnings from local authorities about the potential dangers of approaching the active volcano.



<h2 class="wp-block-heading" id="h-impacts-of-mount-etna-eruptions">Impacts of Mount Etna eruptions </h2>



Despite the dramatic displays, there were no reports of injuries or significant property damage, though experts continue to closely monitor the situation.



Satellite imagery has provided detailed views of the active lava flow cutting through the snow-covered slopes, with ash plumes dispersing from the summit.



“The presence of ash prompted authorities to raise the aviation color code to orange on February 13. On other days during this eruption, it was elevated to red, the highest level of concern. The airport in nearby Catania diverted flights amid hazardous conditions, according to news reports,” said NASA.



“Since Etna stirred to life this time around, crowds of hikers and even some skiers flocked to its slopes to witness the fiery displays and lava flows melting through snow. The eruption was ongoing as of February 18, with weak ash emissions and decreasing explosive activity.”



<h2 class="wp-block-heading" id="h-a-volcano-with-a-long-history">A volcano with a long history </h2>



Mount Etna has a history stretching back hundreds of thousands of years. Located on the east coast of Sicily, near Catania, the volcano has shaped the landscape and influenced human civilization.



The volcano’s activity dates back at least 500,000 years, with its earliest eruptions occurring beneath the sea before the landmass emerged. Over time, lava flows, <a href="https://www.earth.com/news/yellowstone-supervolcano-eruption-study-sparks-new-debate-on-where-and-when-it-will-erupt/" target="_blank" rel="noreferrer noopener">eruptions</a>, and collapses have sculpted the towering stratovolcano seen today.



Ancient civilizations were well aware of Etna’s power. Greek mythology depicted it as the forge of Hephaestus, the god of fire, while the poet Pindar described its violent eruptions. The philosopher Empedocles was even said to have perished in its fiery depths.&nbsp;



Etna’s eruptions were documented throughout Roman history, including a major event in 122 BC that devastated Catania.



During the Middle Ages and Renaissance periods, Etna continued its eruptions, frequently altering its landscape and affecting nearby settlements.&nbsp;



<h2 class="wp-block-heading" id="h-monitoring-the-activity-of-mount-etna">Monitoring the activity of Mount Etna </h2>



One of the most devastating eruptions occurred in 1669, when lava flows destroyed several villages and overwhelmed parts of Catania’s city walls. Despite these dangers, people continued to live and farm on Etna’s fertile slopes, taking advantage of its rich volcanic soil.



Scientific study of Mount Etna began in the 19th and 20th centuries, as researchers sought to understand its behavior and mitigate its risks. Advances in monitoring technology have since helped track its activity, though eruptions remain unpredictable.&nbsp;



In modern times, Etna continues to be one of the most closely watched <a href="https://www.earth.com/news/axial-seamount-large-underwater-volcano-off-us-coast-will-likely-erupt-in-2025/" target="_blank" rel="noreferrer noopener">volcanoes</a> in the world, with frequent eruptions, ash clouds, and lava flows affecting air travel and local communities.



Mount Etna was designated a UNESCO World Heritage Site in 2013 due to its geological significance and cultural history.&nbsp;



Today, the <a href="https://www.earth.com/news/earths-next-big-volcano-eruption-will-cause-global-chaos-climate-impact/" target="_blank" rel="noreferrer noopener">volcano</a> attracts tourists, scientists, and locals alike, serving as both a reminder of nature’s power and a source of economic and scientific interest.



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Fiery eruption of Mount Etna captured from space

Today's Image of the Day from the European Space Agency features NGC 1333, a reflection nebula located in the Perseus molecular cloud about 960 light-years away from Earth. The photo is a mosaic of images captured by the James Webb Space Telescope.



<h2 class="wp-block-heading" id="h-the-power-of-webb-nbsp-nbsp">The power of Webb&nbsp;&nbsp;</h2>



“Webb’s superb sensitivity allows astronomers to investigate young objects with extremely low masses. Some of the faintest ‘stars’ in the picture are in fact newly born free-floating brown dwarfs with masses comparable to those of giant planets,” noted <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">ESA</a>.



The same cluster was featured as the 33rd anniversary image of the Hubble Space Telescope in April 2023.&nbsp;



According to ESA, Hubble’s image just scratched the surface of this region, because clouds of dust obscure much of the star formation process. 



"Observing with larger aperture and in the infrared part of the spectrum, Webb is capable of peering through the dusty veil to reveal newborn stars, brown dwarfs and planetary mass objects."



<h2 class="wp-block-heading" id="h-webb-s-view-of-ngc-1333">Webb’s view of NGC 1333</h2>



ESA noted that the center of the image presents a deep peek into the heart of the NGC 1333 cloud. 



“Across the image we see large patches of orange, which represent gas glowing in the infrared. These so-called Herbig-Haro objects form when ionized material ejected from young stars collides with the surrounding cloud. They are hallmarks of a very active site of star formation."



The disks of gas and dust that surround the <a href="https://www.earth.com/news/newly-discovered-stars-milky-way-are-old-as-universe/" target="_blank" rel="noreferrer noopener">stars</a> in this image may eventually produce planetary systems.&nbsp;



<h2 class="wp-block-heading" id="h-formation-of-the-sun">Formation of the Sun</h2>



“Similar to the young stars in this mosaic, our own Sun and planets formed inside a dusty molecular cloud, 4.6 billion years ago. Our Sun did not form in isolation but as part of a cluster, which was perhaps even more massive than NGC 1333,” explained ESA.



Over time, the stars in the Sun's birth cluster would have drifted apart due to gravitational interactions and the dispersion of gas in the region.



Astronomers have been studying certain clues, such as isotopic signatures in meteorites, that hint the Sun may have formed near massive stars. These stars likely produced supernovae, which could have influenced the early <a href="https://www.earth.com/news/mysterious-objects-spotted-in-the-outer-solar-system-beyond-pluto/" target="_blank" rel="noreferrer noopener">solar system</a> by injecting heavy elements like iron-60.



<h2 class="wp-block-heading" id="h-star-formation-in-ngc-1333">Star formation in NGC 1333</h2>



NGC 1333 is a vibrant example of a stellar nursery, where active <a href="https://www.earth.com/news/baby-stars-release-sneezes-of-gas-and-dust-as-they-develop/" target="_blank" rel="noreferrer noopener">star formation</a> is ongoing. It is known for its chaotic appearance, shaped by the interactions between newborn stars and the surrounding material.



Within NGC 1333, astronomers have observed a high level of turbulence, which makes the region dynamic and complex. 



These disturbances are caused by the outflows of young stars as they eject material into their surroundings, creating shock waves and influencing further star formation.&nbsp;



These outflows are often seen as jets, which are visible in multiple wavelengths of light, especially infrared, as the surrounding dust absorbs visible light.



<h2 class="wp-block-heading" id="h-significance-of-ngc-1333">Significance of NGC 1333</h2>



NGC 1333 is also an area of interest for studying the early stages of star and <a href="https://www.earth.com/news/planet-formation-new-insights-mechanics-physics/" target="_blank" rel="noreferrer noopener">planet formation</a>, as many of the stars within the cluster are in their infancy, still in the process of gathering material and developing protoplanetary disks.&nbsp;



In images, NGC 1333 is marked by bright patches of blue and red, representing reflection <a href="https://www.earth.com/news/six-rogue-worlds-discovered-inside-a-young-star-forming-nebula/" target="_blank" rel="noreferrer noopener">nebulae</a> and the ionized gas created by energetic young stars.&nbsp;



<h2 class="wp-block-heading" id="h-the-perseus-molecular-cloud-nbsp">The Perseus molecular cloud&nbsp;</h2>



The Perseus molecular cloud is a vast region of cold gas and dust located about 600 light-years away from Earth in the constellation <a href="https://www.earth.com/news/1500-billion-orphan-stars-discovered-in-the-perseus-galaxy-cluster/" target="_blank" rel="noreferrer noopener">Perseus</a>.&nbsp;



It is one of the most studied star-forming regions in our galaxy due to its relative proximity and the diversity of its young stellar objects. This cloud spans several hundred light-years and contains dense pockets of gas where new stars are actively forming.&nbsp;



These areas are often enshrouded in thick dust, which obscures them in visible light but allows astronomers to study them using infrared and radio wavelengths.



The Perseus molecular cloud is particularly interesting because of the chemistry taking place within it, including the formation of complex organic molecules that could be precursors to life.&nbsp;



Image Credit: ESA/Webb, NASA &amp; CSA



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Stellar nursery shines in the Perseus cloud

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

Today's Image of the Day from NASA Earth Observatory features smoke streaming from Tasmania, where bushfires were ignited by dry lightning strikes earlier this month.&nbsp;



By February 5, more than a dozen fires were burning in the state's remote central and western regions.



<h2 class="wp-block-heading" id="h-bushfires-fueled-by-challenging-conditions">Bushfires fueled by challenging conditions </h2>



Communities such as Zeehan, Corinna, and Pieman Heads have been threatened, leading to evacuations and significant disruptions during the peak tourism season.



“In early February 2025, bushfires ignited in northwestern Tasmania, where they have continued to burn on the island for more than a week amid windy, warm, and dry conditions,” said <a href="https://earthobservatory.nasa.gov/images/153933/smoke-billows-from-bushfires-in-tasmania" target="_blank" rel="noreferrer noopener">NASA</a>.



“Smoke from the fires is visible in this image, acquired at about 4 p.m. local time on February 12, 2025, by the MODIS (Moderate Resolution Imaging Spectroradiometer) instrument on NASA’s Aqua satellite.”



<h2 class="wp-block-heading" id="h-impacts-of-the-tasmania-bushfires">Impacts of the Tasmania bushfires</h2>



The <a href="https://www.earth.com/news/wildfires-threaten-the-recovery-of-the-ozone-layer/" target="_blank" rel="noreferrer noopener">fires</a> have burned over 90,000 hectares, with a combined perimeter exceeding 1,200 kilometers.



The fires are expected to continue burning for several more weeks. Due to the region's remote and challenging terrain, authorities report that significant effort is still needed to gain control over the blazes.



“According to a heatwave warning from Australia’s Bureau of Meteorology (BoM), much of the state’s west coast saw severe heatwave conditions on several days during the week of February 10,” noted NASA.



“The region has also been exceptionally dry. For example, the past 12-month period has been the driest on record (since 1900) along the coastal areas near Sandy Cape.”



<h2 class="wp-block-heading" id="h-cultural-and-heritage-sites">Cultural and heritage sites</h2>



One significant area under threat is the takayna/Tarkine region in northwest Tasmania. This region is home to a grove of ancient Huon pine trees, including one estimated to be between 2,500 and 3,000 years old, making it the oldest known Huon pine.&nbsp;



The Yellowband Plain fire has burned perilously close to this grove, coming within meters of these irreplaceable trees.



Firefighters from Tasmania, interstate, and New Zealand are collaborating to control the blazes and help protect the Huon pine trees, as well as Indigenous heritage sites. 



Efforts to assess and mitigate the damage have been hampered by challenging weather conditions, including low cloud cover that restricts aerial surveys. Strong winds of up to 50 miles per hour have also complicated efforts to contain the bushfires.&nbsp;



<h2 class="wp-block-heading" id="h-climate-change-is-intensifying-bushfires-nbsp">Climate change is intensifying bushfires&nbsp;</h2>



Climate change and bushfires are deeply interconnected, with rising global temperatures intensifying the frequency and severity of wildfires in many regions.&nbsp;



Warmer temperatures lead to drier conditions, reducing moisture in vegetation and making it more susceptible to ignition. Prolonged droughts - which are becoming more common due to climate change - further dry out forests and grasslands, creating an abundance of flammable material.



Extreme heat waves increase the likelihood of fires starting and spreading rapidly. Higher temperatures also contribute to stronger winds, which can fan flames and carry embers over long distances, igniting new fires. 



Additionally, shifting <a href="https://www.earth.com/news/ultrafine-particles-in-wildfire-smoke-change-weather-patterns/" target="_blank" rel="noreferrer noopener">weather patterns</a> are altering fire seasons, making them longer and more unpredictable. Some areas that previously had clear fire seasons are now experiencing fires year-round.



<h2 class="wp-block-heading" id="h-shifting-behavior-of-wildfires-nbsp">Shifting behavior of wildfires&nbsp;</h2>



Climate change is also affecting the way bushfires behave. Many recent wildfires have been more intense, burning hotter and <a href="https://www.earth.com/news/fast-wildfires-are-gaining-even-more-speed/" target="_blank" rel="noreferrer noopener">spreading faster</a> than historical fires. This makes them harder to control and increases their impact on communities, ecosystems, and wildlife. 



The destruction of forests not only contributes to immediate carbon emissions but also reduces the planet’s ability to absorb carbon dioxide, creating a feedback loop that worsens climate change.



<h2 class="wp-block-heading" id="h-consequences-of-increased-fire-activity">Consequences of increased fire activity</h2>



Beyond the direct effects on landscapes and air quality, increased bushfire activity has severe consequences for <a href="https://www.earth.com/news/wildfire-smoke-is-an-underestimated-threat-to-public-health/" target="_blank" rel="noreferrer noopener">human health</a>, economies, and biodiversity. 



Smoke from large wildfires contains fine particles that can cause respiratory problems and other health issues, even for people far from the fire zones.&nbsp;



Wildlife struggles to escape or recover from habitat destruction, sometimes pushing species closer to extinction.



<h2 class="wp-block-heading" id="h-mitigating-the-risks">Mitigating the risks</h2>



Efforts to mitigate these risks include better fire management strategies, improved early <a href="https://www.earth.com/news/bushfires-are-detected-500-times-faster-with-ai-satellites/" target="_blank" rel="noreferrer noopener">warning systems</a>, and sustainable land-use practices. 



However, long-term solutions require addressing the root cause - reducing greenhouse gas emissions to slow down global warming.&nbsp;



Without significant action, climate change will continue to fuel more extreme and destructive bushfires, with devastating consequences for both nature and society.



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Tasmania bushfires: A growing crisis in an era of climate change

Today's Image of the Day from NASA Earth Observatory features an astronaut view of Mount Nemrut, a volcano located in eastern Turkey near Lake Van.



Mount Nemrut is notable for its immense caldera, which was formed through a series of <a href="https://www.earth.com/news/volcanic-eruptions-play-an-overlooked-role-in-earths-climate/" target="_blank" rel="noreferrer noopener">eruptions</a>. The caldera, one of the largest in the world, now contains several lakes such as Lake Nemrut.&nbsp;



"The eastern half of the caldera is partially filled by solidified lava flows from past eruptions. Snow cover present at the time of this photo accentuates pressure ridges that formed as the lava was flowing and cooling," noted <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA</a>.



"These pressure ridges vary in size, thickness, and orientation due to the varying viscosity and flow direction of the lavas during eruptions."



<h2 class="wp-block-heading" id="h-formation-of-lake-nemrut">Formation of Lake Nemrut</h2>



"Lake Nemrut (Nemrut Gölü) occupies the western half of the caldera, creating a rough crescent shape that partially submerges the old lava flows," said NASA.



"This freshwater lake, reaching up to 176 meters deep, is accompanied by a smaller lake at the upper-center of the caldera."



The lake was formed after the collapse of the Nemrut volcano's summit. This collapse created a massive crater, which gradually filled with water over time, forming the <a href="https://www.earth.com/news/alarming-study-most-of-the-worlds-largest-lakes-are-quickly-losing-water/" target="_blank" rel="noreferrer noopener">lake</a>.



<h2 class="wp-block-heading" id="h-unesco-world-heritage-site">UNESCO World Heritage Site </h2>



Mount Nemrut and its surroundings are part of a protected UNESCO World Heritage Site due to their ecological and geological significance.



The site is home to diverse wildlife, including various bird species that use the lake as a stopover during migration. The caldera also contains smaller lakes and wetlands, adding to the area's biodiversity.



Lake Nemrut is a popular destination for tourists, hikers, and nature enthusiasts, offering stunning views of the volcanic landscape.



Despite its popularity, the lake remains relatively remote and unspoiled, contributing to its appeal as a natural wonder.



<h2 class="wp-block-heading" id="h-mount-nemrut-has-shaped-the-landscape">Mount Nemrut has shaped the landscape</h2>



Geologically, Mount Nemrut is interesting because its <a href="https://www.earth.com/news/new-research-enhances-predictions-on-volcanic-eruptions/" target="_blank" rel="noreferrer noopener">eruptions</a> have played a key role in shaping the local landscape. 



Its last major eruption occurred around 1441 AD, which indicates that it's not currently active.



The area around Nemrut is known for its geothermal activity, including hot springs and fumaroles, suggesting that there is still significant heat beneath the surface.



<h2 class="wp-block-heading" id="h-tribute-to-a-king">Tribute to a king</h2>



Over thousands of years, various civilizations have inhabited the region around Nemrut, leaving behind a wealth of archaeological sites.



The summit of Mount Nemrut is dominated by a vast funerary mound constructed by King Antiochus I Theos, who ruled the Kingdom of Commagene in the 1st century BCE. 



The site was intended to serve as his tomb sanctuary and a place to commemorate the king's vision of divine kingship and unity between Eastern and Western cultures.



The mound, made of loose crushed stones, measures about 50 meters (164 feet) in height and spans a diameter of 150 meters (492 feet), creating an imposing feature visible from afar.



Surrounding the mound are terraces on the eastern, western, and northern sides, each adorned with colossal statues and reliefs. The statues, ranging in height from 8 to 10 meters (26 to 33 feet), represent various deities, including Zeus, Apollo, Hercules, and the goddess Tyche, alongside King Antiochus himself. 



The heads of the statues, many of which have toppled over due to <a href="https://www.earth.com/news/new-map-shows-75-percent-of-the-u-s-at-risk-of-damaging-earthquakes/" target="_blank" rel="noreferrer noopener">earthquakes</a> and erosion, lie scattered around the site.



<h2 class="wp-block-heading" id="h-spiritual-and-religious-practices">Spiritual and religious practices</h2>



In addition to the statues, inscriptions at Mount Nemrut provide valuable historical information about the kingdom, the king's lineage, and the religious practices of the time.



The site is not only a marvel of ancient engineering but also a spiritual and astronomical center. Scholars believe the terraces were aligned with celestial events, serving as an observatory for solstices and equinoxes.



In addition to its natural and historical significance, the Nemrut volcano has been the subject of scientific study, as researchers aim to understand more about <a href="https://www.earth.com/news/volcanic-eruptions-play-an-overlooked-role-in-earths-climate/" target="_blank" rel="noreferrer noopener">volcanic activity</a> in the region, the history of its eruptions, and the potential risks it may pose in the future.



Image Credit: NASA Earth Observatory



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Mount Nemrut: Ancient mysteries and natural marvels 

Tarantula hawks produce large quantities of venom and their stings produce immediate, intense, excruciating short term pain in envenomed humans. Although the instantaneous pain of a tarantula hawk sting is the greatest recorded for any stinging insect, the venom itself lacks meaningful vertebrate toxicity. Photo Credit: Sari ONeil

Tarantula Hawk Spider Wasp

The Universe contains many types of massive formations that shape our understanding of how stars and galaxies group together. Astronomers have long studied these sprawling patterns, which give valuable clues about where matter gathers and where it remains thinly spread. 



These features define how cosmic evolution unfolds and guide current theories of how the universe expands.



Recently, a team of experts announced a giant find. This collection of galaxy clusters surpasses previous giants by orders of magnitude.



This study adds fresh insights by demonstrating that our <a href="https://www.earth.com/news/interstellar-tunnel-found-that-connects-our-solar-system-to-other-stars/" target="_blank" rel="noreferrer noopener">cosmic neighborhood</a> can still surprise us with unexpected details about how matter arranges itself across unimaginable distances.



<h2 class="wp-block-heading" id="h-galaxy-clusters-distribution">Galaxy clusters distribution</h2>



Hans Böhringer from the Max Planck Institute for Extraterrestrial Physics (<a href="https://www.mpe.mpg.de/main" target="_blank" rel="noreferrer noopener">MPE</a>) coordinated the effort in collaboration with the Max Planck Institute for Physics (<a href="https://www.mpp.mpg.de/en/" target="_blank" rel="noreferrer noopener">MPP</a>) and teams in Spain and South Africa. 



Their work relied on the ROSAT X-ray satellite’s survey, which singled out clusters of galaxies by detecting the energetic radiation these huge clusters emit. 



These data allowed the researchers to build a three-dimensional map of our cosmic vicinity.



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/02/quipo_superstructure_3D-model_credit-MPE_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/02/quipo_superstructure_3D-model_credit-MPE_1s.webp" alt="Three-dimensional representation of the Quipu superstructure. Credit: MPE" class="wp-image-1960534"/></a><figcaption class="wp-element-caption">Three-dimensional representation of the Quipu superstructure. Credit: MPE</figcaption></figure>



“If you look at the distribution of the galaxy clusters in the sky in a spherical shell with a distance of 416 to 826 million light-years, you immediately notice a huge structure that stretches from high northern latitudes to almost the southern end of the sky,” explains Böhringer.



By tracing each cluster’s position in space, his team pinpointed how matter spreads out in swirling patterns of galaxies.



<h2 class="wp-block-heading" id="h-the-quipu-superstructure">The Quipu superstructure</h2>



The researchers named this discovery “Quipu,” taking inspiration from the knotted string recording system once used by the Incas. 



Observed as a long strand with smaller threads branching off, the Quipu superstructure contains 68 galaxy clusters with a combined mass of about 2.4 × 10^17 solar masses. 



Its size of roughly 1.4 billion light-years makes Quipu the largest superstructure ever accurately measured, surpassing the Sloan Great Wall’s 1.1 billion light-years.



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/02/quipo_superstructure_illustration_credit-MPE_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/02/quipo_superstructure_illustration_credit-MPE_1s.webp" alt="Distribution of galaxies (color coding) and galaxy clusters (black dots) in a spherical shell with a distance of 416 to 826 million light years surrounding us. The five superstructures are marked: 1 Quipu, 2 Shapley, 3 Serpens-Corona Borealis and Hercules (overlapping in the sky), 4 Sculptor-Pegasus. The area enclosed by white lines is shadowed by the disk of the Milky Way. Credit: MPE" class="wp-image-1960536"/></a><figcaption class="wp-element-caption">Distribution of galaxies (color coding) and galaxy clusters (black dots) in a spherical shell with a distance of 416 to 826 million light years surrounding us. The five superstructures are marked: 1 Quipu, 2 Shapley, 3 Serpens-Corona Borealis and Hercules (overlapping in the sky), 4 Sculptor-Pegasus. The area enclosed by white lines is shadowed by the disk of the Milky Way. Credit: MPE</figcaption></figure>



“This breaks the size record of all reliably measured cosmic structures,” note the researchers who compared the finding with other known formations. 



“The Quipu superstructure, end to end, is slightly longer than the <a href="https://www.researchgate.net/figure/SDSS-3D-Universe-Map-Credit-Sloan-Digital-Sky-Survey-Team-NASA-NSF-DOE_fig2_357328983" target="_blank" rel="noreferrer noopener">Sloan Great Wall</a>,” says J. Richard Gott III at Princeton University, who helped discover the Sloan Great Wall. “Congratulations to them for finding it.” 



The name also reflects a connection to Chile, where many distance measurements took place, and where ancient quipus are showcased in Santiago.



<h2 class="wp-block-heading" id="h-quipu-and-cosmological-principle">Quipu and cosmological principle</h2>



Across extremely large distances, matter is believed to spread out nearly evenly. At smaller scales of about a billion light-years, it collects in superclusters and leaves behind voids. 



This balance underpins the <a href="https://www.earth.com/news/cosmic-order-or-chaos-universe-expansion-may-follow-a-hidden-pattern/" target="_blank" rel="noreferrer noopener">cosmological principle</a>, which suggests that if we look far enough, the universe should appear uniform in every direction. 



Some experts argue these huge arrangements question that principle’s validity, with past findings triggering debates. 



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/02/great-sloan-wall_superstructure_SDSS_credit-MIT_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/02/great-sloan-wall_superstructure_SDSS_credit-MIT_1s.webp" alt="Sloan Great Wall of galaxies. SDSS 3D Universe Map Credit: Sloan Digital Sky Survey Team, NASA, NSF, DOE." class="wp-image-1960531"/></a><figcaption class="wp-element-caption">Sloan Great Wall of galaxies is 1.1 billion light years long. SDSS 3D Universe Map Credit: Sloan Digital Sky Survey Team, NASA, NSF, DOE.</figcaption></figure>



“Making observations in too small a part of the universe, which has been done earlier on, can be misleading,” says Böhringer. 



Another point comes from an ambiguous definition of the principle. “There is not yet one definition of the cosmological principle that every cosmologist agrees on,” says Alexia Lopez at the <a href="https://www.uclan.ac.uk/" target="_blank" rel="noreferrer noopener">University of Central Lancashire</a> in the UK. 



Meanwhile, Seshadri Nadathur at the <a href="https://www.port.ac.uk/" target="_blank" rel="noreferrer noopener">University of Portsmouth</a> notes that “some of those galaxies may drift apart from each other instead of collapsing in on themselves, in which case, according to some interpretations, it’s not really a bound structure.”



<h2 class="wp-block-heading" id="h-cosmic-measurements-and-consequences">Cosmic measurements and consequences</h2>



Quipu’s existence highlights how vast formations can shape calculations of cosmic expansion rates and the properties of primordial radiation left over from the early universe. 



Astronomers pay close attention to features like superclusters because they alter light paths and influence how we determine important parameters such as the <a href="https://www.earth.com/news/unknown-factors-are-accelerating-the-expansion-of-the-universe/" target="_blank" rel="noreferrer noopener">Hubble constant</a>. 



Small discrepancies can add up when researchers aim for precise numbers in modern cosmological studies.



“Even if these are only corrections of a few percent, they become increasingly important as the accuracy of cosmological observations increases,” emphasizes Gayoung Chon from the Max Planck Institute for Physics. 



This structure offers a reminder that the cosmos presents patterns on many scales. Those patterns appear to affect how we interpret data on the universe’s origin and shape the <a href="https://www.earth.com/news/massive-galactic-explosion-provides-clues-about-galaxy-evolution/" target="_blank" rel="noreferrer noopener">evolution of galaxies</a> in our vicinity and beyond.



<h2 class="wp-block-heading" id="h-quipu-and-the-incas">Quipu and the Incas</h2>



The Incas once managed vast territories using quipus, a system of knotted strings that helped track resources and information. 



Each knot arrangement acted like a code, revealing essential data in a form that required no written script.



Quipu’s naming borrowed that image of intertwined threads. 



Researchers see it as a nod to humanity’s long history of gathering knowledge, whether through knotted strings or advanced telescopes that trace the distribution of galaxies across cosmic depths.



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



The discovery underscores how ongoing surveys might uncover more structures. 



Scientists are keen to see if similar patterns exist in parts of the sky that remain less charted, which could either confirm current theories or reveal new gaps in our understanding.



Future maps will rely on technology to gather clearer data from remote regions. 



These efforts reflect a human wish to capture our place in the universe, searching for the patterns that connect everything from particles to vast congregations of galaxies.



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Featured image: The open cluster Westerlund 1 is located roughly 12,000 light-years away in the southern constellation Ara (the Altar) where it resides behind a huge interstellar cloud of gas and dust. Credit: <a href="https://www.esa.int" target="_blank" rel="noreferrer noopener">ESA</a>



The full study was published in the journal <a href="https://arxiv.org/abs/2501.19236" target="_blank" rel="noreferrer noopener">Astronomy and Astrophysics</a>.



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Largest structure ever found in the universe is 1.4 billion light years long

The Universe contains many types of massive formations that shape...

The ability of robots to navigate aquatic environments is crucial for a variety of applications, such as mapping pollution levels and monitoring the health of coral reefs. However, challenges remain.



The commotion from the noisy propellers of these underwater devices can cause unnecessary disturbances, and even harm wildlife.



The natural obstacles in these aquatic settings - like plants, underwater animals, and floating debris - further test the navigation abilities of these robotic swimmers.



<h2 class="wp-block-heading" id="h-tiny-robot-with-big-potential">Tiny robot with big potential</h2>



A team of experts has introduced a novel solution to these issues. They have developed a compact, nimble robot that is capable of navigating tight corners and carrying payloads much heavier than itself. 



Remarkably, the aquatic robot is smaller than the size of a credit card and weighs only 6 grams (0.2 ounces).



This tiny device is designed to work in confined environments, making it perfect for tasks like inspecting waterborne machines and studying the <a href="https://www.earth.com/news/pesticides-travel-far-and-wide-endangering-aquatic-ecosystems/" target="_blank" rel="noreferrer noopener">aquatic ecosystem</a> of compact spaces, like rice fields.



Herbert Shea, head of <a href="https://sti.epfl.ch/" target="_blank" rel="noreferrer noopener">EPFL</a>'s Soft Transducers Lab, elaborated on the challenges of developing aquatic robots.



“In 2020, our team demonstrated autonomous insect-scale crawling robots, but making untethered ultra-thin robots for aquatic environments is a whole new challenge. We had to start from scratch, developing more powerful soft actuators, new undulating locomotion strategies, and compact high-voltage electronics,” said Shea.



<h2 class="wp-block-heading" id="h-movements-of-marine-flatworms">Movements of marine flatworms</h2>



Breaking away from traditional propeller-based systems, this new robot propels forward with silently undulating fins that are inspired by the movements of marine flatworms.



This novel design, coupled with its feather-weight structure, allows the robot to float on the water’s surface and blend into its natural surroundings without causing a stir.



Florian Hartmann, a former EPFL researcher who is now a research group leader at the Max Planck Institute for Intelligent Systems, in Stuttgart, Germany, offered an interesting perspective.



“Our design doesn’t simply replicate nature; it goes beyond what natural organisms can achieve," he said.



By oscillating its fins up to 10 times faster than marine flatworms undulate, this new <a href="https://www.earth.com/news/tiny-robotic-fish-developed-to-collect-microplastics/" target="_blank" rel="noreferrer noopener">robotic swimmer</a> achieves impressive speeds of 12 centimeters (4.7 inches) per second, which is equivalent to 2.6 body lengths per second.



With four artificial muscles driving the fins, the robot exhibits unprecedented maneuverability, which allows controlled backward and sideways swimming.



<h2 class="wp-block-heading" id="h-potential-applications-of-aquatic-robots">Potential applications of aquatic robots</h2>



The researchers developed a compact control system that charges the robot’s actuators with up to 500 volts at a power of 500 milliwatts - four times less than that of an electric toothbrush.



Despite using a high voltage, the tiny robot's low currents and shielded circuitry make it perfectly safe for its environment.



The light sensors on the robot act as its eyes, enabling it to detect and follow underwater light sources autonomously .



The potential applications of this swimming robot include <a href="https://www.earth.com/news/ocean-of-things-tech-will-transform-ocean-data-collection/" target="_blank" rel="noreferrer noopener">ecological studies</a>, pollution tracking, and precision agriculture. However, the researchers are not finished with the robot just yet.



“We aim to extend operating times and enhance autonomy. The fundamental insights gained from this project will not only advance the science of <a href="https://www.earth.com/news/hummingbird-wings-the-future-of-robotic-flight/" target="_blank" rel="noreferrer noopener">bioinspired robotics</a> but also lay the foundation for practical, lifelike robotic systems that harmonize with nature,” said Hartmann.



<h2 class="wp-block-heading" id="h-the-future-of-bioinspired-robotics">The future of bioinspired robotics</h2>



The team now plans to focus on expanding this miniature aquatic robot’s capabilities. They wish to integrate more advanced sensors, improve battery life, and refine autonomous decision-making.



Future iterations could feature enhanced <a href="https://www.earth.com/news/ai-can-design-and-build-walking-robots-in-seconds/" target="_blank" rel="noreferrer noopener">AI-driven</a> navigation, which would allow these tiny swimmers to collaborate in groups (much like schools of fish) for large-scale environmental assessments.



In the realm of precision agriculture, such robots could assist in monitoring irrigation systems and identifying nutrient imbalances in flooded crops. 



They may also play a role in underwater infrastructure inspections, assisting in detecting pipeline leaks or assessing the condition of offshore wind farms.



By combining cutting-edge robotics with insights from nature, researchers are not only overcoming long-standing challenges in aquatic exploration but also paving the way for a new generation of intelligent, adaptable, and environmentally harmonious robotic systems.



The full study was published in the journal <a href="https://www.science.org/doi/10.1126/scirobotics.adr0721" target="_blank" rel="noreferrer noopener">Science Robotics</a>.



Image Credit: © EPFL-LMTS



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Aquatic robot inspired by flatworms can swim in harmony with nature

The ability of robots to navigate aquatic environments is crucial...

Water is essential to life, driving our economies and supporting the foundation of ecosystems. Yet, despite its critical role, many regions are facing severe water shortages.



Add to this the plight of a warming planet, and the result is an urgent global crisis that needs effective water management strategies.



Research conducted by Lorenzo Rosa of <a href="https://carnegiescience.edu" target="_blank" rel="noreferrer noopener">Carnegie Science</a> and Matteo Sangiorgio of the <a href="https://www.polimi.it" target="_blank" rel="noreferrer noopener">Polytechnic University of Milan</a> sheds light on the growing water crisis under various climate scenarios.



The experts emphasize a critical need for robust <a href="https://www.earth.com/news/fog-harvesting-could-ease-water-shortages-in-the-worlds-driest-places/" target="_blank" rel="noreferrer noopener">water</a> policies, with insights that could prove instrumental in future preparations.



<h2 class="wp-block-heading" id="h-the-water-gap-issue">The water gap issue</h2>



A "water gap" happens when people need more water than what is available. This problem affects billions of people around the world.



The amount of water needed for drinking, farming, and industry is often more than what nature can provide. When people use too much water without allowing time for it to be replenished, natural sources like rivers, lakes, and aquifers start to dry up.



Over time, this continuous overuse creates a serious water shortage, making it harder for communities, farms, and businesses to get the water they need.



"Water scarcity is one of the greatest challenges facing humanity this century. About 4 billion people reside and about half the world's irrigated agriculture is in regions that experience <a href="https://www.earth.com/news/global-drought-has-caused-crisis-levels-of-food-and-water-scarcity/" target="_blank" rel="noreferrer noopener">water</a> scarcity for at least one month each year," said Rosa.



<h2 class="wp-block-heading" id="h-climate-change-and-water-shortages">Climate change and water shortages</h2>



The water <a href="https://www.earth.com/news/climate-change-is-now-the-driving-force-behind-droughts/" target="_blank" rel="noreferrer noopener">scarcity</a> issue is further complicated by climate change. Rising temperatures destabilize rainfall patterns, shift water cycles, and deplete natural freshwater sources. 



This adds substantial strain to already fragile water systems, elevating the risk of shortages in urban and rural areas.



According to Rosa, higher temperatures accelerating evaporation rates can deplete water supplies, even in regions that have historically been stable. Unpredictable weather patterns causing droughts and floods further complicate water management.



<h2 class="wp-block-heading" id="h-water-demand-amidst-population-growth">Water demand amidst population growth</h2>



Population explosion further strains water resources with expanding cities requiring greater quantities for drinking, sanitation, and industrial usage. 



Agricultural production must also increase to feed the growing population, making water conservation and management even more critical.



"We must be able to balance environmental resilience and the growing need for water in a warming world with a burgeoning population," noted Rosa.



<h2 class="wp-block-heading" id="h-rising-temperatures-and-water-shortages">Rising temperatures and water shortages</h2>



The research paints a troubling picture. The baseline global water gap stands at nearly 458 billion cubic meters (121 trillion gallons) annually.



The water gap is expected to increase by 6% under 1.5°C (2.7°F) warming and by 15% under 3°C (5.4°F) warming.



"Even relatively modest increases in the water gap can put pressure on ecosystems and lead to severe shortages for agricultural use, resulting in food insecurity," said Rosa.



Water resource management needs quick action and future planning. Building better systems to store and share water can help solve the problem. Advances in technology present possibilities like desalination of seawater and wastewater treatment and reuse.



Agriculture, a major consumer of <a href="https://www.earth.com/news/distress-signals-earths-water-cycle-is-becoming-more-erratic/" target="_blank" rel="noreferrer noopener">global water</a>, must adapt by shifting to crops that require less water or employing advanced irrigation techniques.



<h2 class="wp-block-heading" id="h-finding-solutions-for-water-shortages">Finding solutions for water shortages </h2>



Rosa's research plays an important role in finding solutions for water shortages. He is exploring ways to make irrigation more efficient so that less water is wasted.



Rosa also investigates how to keep soil moist for longer, which helps crops grow with less water. Another part of his work focuses on improving how water is stored, making sure it is available when needed.



In addition to water management, Rosa also examines how to reduce the harmful effects of fertilizer production on the environment. The goal is to make farming more sustainable, ensuring that future generations can grow food without harming natural resources.



As climate change intensifies, water shortages will continue to be a significant issue across the globe. It is essential for policymakers, researchers, and communities to collaborate on finding effective solutions.



By understanding water scarcity and exploring innovative approaches, we can work toward ensuring a sustainable water future.



The study is published in the journal <a href="https://www.nature.com/articles/s41467-025-56517-2" target="_blank" rel="noreferrer noopener">Nature Communications</a>.&nbsp;



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Climate change is fueling a global water crisis

Water is essential to life, driving our economies and supporting...

For centuries, humans have explored the potential of mushrooms. Valued not only for their unique flavors, mushrooms have also been revered for their medicinal properties, including their ability to enhance immunity and promote overall health.



These ancient perceptions are now being confirmed by <a href="https://www.earth.com/news/soil-bacteria-help-plants-balance-growth-and-immunity/" target="_blank" rel="noreferrer noopener">science</a>, which has found that mushrooms have more than gastronomic value.



<h2 class="wp-block-heading" id="h-the-role-of-beta-glucan">The role of beta-glucan</h2>



One small yet remarkably significant component found in all mushrooms - beta-glucan - has recently gained the attention of scientists, thanks to its potential role in combating the flu. 



While mushrooms are often celebrated for their nutritional value, this particular compound has been highlighted for its ability to bolster the immune system. 



Beta-glucan is a naturally occurring polysaccharide that enhances the body's defense mechanisms, making it a promising ally in the battle against various viral infections, including the flu. 



Though it may seem surprising at first, this unassuming fungal ingredient could play a pivotal role in helping to prevent or mitigate the severity of flu infections, offering a new avenue for research into natural immune support.



<h2 class="wp-block-heading" id="h-mushrooms-and-wellness">Mushrooms and wellness</h2>



In the food and health industry, mushrooms have achieved superfood status due to their nutrient-dense structure of vitamins, minerals, and bioactive compounds. Their application in diets worldwide has been shifted from being flavor-based to <a href="https://www.earth.com/news/how-tiny-bacteria-outsmart-the-human-immune-system/" target="_blank" rel="noreferrer noopener">health-based</a>.



Mushrooms are linked to improved brain health, as evidence shows that they may help protect against cognitive decline. Mushrooms also contribute to better digestive health with their fiber content.



A new study sheds light on a special role of mushrooms in health maintenance beyond what was previously recognized. 



According to the research, mushrooms might assist the body in keeping infections at bay and preventing harmful inflammation. The experts report that mushrooms might render flu infections less damaging. 



<h2 class="wp-block-heading" id="h-how-mushrooms-fight-the-flu">How mushrooms fight the flu</h2>



Researchers at <a href="https://www.mcgill.ca" target="_blank" rel="noreferrer noopener">McGill University</a> in Canada investigated the intriguing effect of beta-glucan on the immune system response to flu. 



The findings indicate that the natural fiber can help people manage flu infections by inhibiting the out-of-control inflammation that usually leads to complications.



"It is tempting to hypothesize that the levels and composition of fungi in an individual could influence how their immune system responds to infections, in part because of beta-glucan," noted study co-author and immunologist Maziar Divangahi.



This is an optimistic departure from conventional flu <a href="https://www.earth.com/news/temperatures-impact-the-immune-system-of-wild-monkeys/" target="_blank" rel="noreferrer noopener">treatment</a> protocols.



<h2 class="wp-block-heading" id="h-keeping-immunity-in-check">Keeping immunity in check</h2>



Beta-glucan, present in fungi cell walls, has been shown to possess immune-stimulating activity. But the study identifies a significant role - it maintains immune balance.



Instead of provoking an out-of-control immune reaction, beta-glucan provokes a controlled reaction within the body, restricting uncontrolled inflammation, which is typically the main threat in extreme cases of the flu.



The researchers tested beta-glucan on mice, infecting some with the flu virus after <a href="https://www.earth.com/news/covid-19-lockdowns-weakened-our-immune-systems/" target="_blank" rel="noreferrer noopener">treatment</a> with beta-glucan.



What they found was remarkable. The treated mice had very little lung inflammation, improved lung function, and a very low probability of becoming seriously ill or dying, even though the mice received no beta-glucan.



Another fascinating finding of the study is the impact of beta-glucan on neutrophils, a type of immune cell. 



Normally, neutrophils induce inflammation, which has the consequence of exacerbating flu infections. Beta-glucan alters their function and makes them resistant to inducing over-inflammation.



<h2 class="wp-block-heading" id="h-future-of-flu-prevention-with-mushrooms">Future of flu prevention with mushrooms</h2>



For years, conventional flu medications have targeted antiviral drugs that directly assault the virus. Antiviral drugs, though, have limitations. Certain strains of the flu develop resistance, and not every patient responds to antivirals.



The study proposes another approach that centers on enhancing the body's immunity against infection, thus opening a new chapter in the treatment of flu.



The study reinforces the idea that edibles can have medicinal benefits. While further research is needed, mushrooms may soon shift from a nutritious ingredient to a vital component for enhancing immunity and protecting against severe respiratory diseases.



As scientific research continues to uncover the immune-boosting benefits of mushrooms, they may soon become a vital component of flu prevention <a href="https://www.earth.com/news/reprogramming-the-immune-system-to-attack-cancer-cells/" target="_blank" rel="noreferrer noopener">protocols</a>. 



Ultimately, mushrooms are more than just a nutritious food - they are a powerful ally in strengthening the immune system.



The study is published in the journal <a href="https://www.nature.com/articles/s41590-024-02041-2" target="_blank" rel="noreferrer noopener">Nature Immunology</a>.



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How mushrooms help the body fight off the flu

For centuries, humans have explored the potential of mushrooms. Valued...

Global warming has already contributed to an alarming decline in plant species. By some estimates, around 600 plant species have vanished since 1750, which is twice the number of animal species lost in the same period.&nbsp;



Yet, questions persist: which plant species are most vulnerable to climate change, and how does changing biodiversity influence interactions between plants?&nbsp;



A research team from the <a href="https://www.awi.de/en/" target="_blank" rel="noreferrer noopener">Alfred Wegener Institute</a> (AWI) tackled these issues by analyzing centuries of plant genetic material preserved in lake sediments.



By focusing on the dramatic warming at the end of the last ice age - approximately 15,000 to 11,000 years ago - the experts gained novel insights into how flora reorganized during what they consider the last major mass extinction event prior to today. 



The findings, published in the journal <a href="http://dx.doi.org/10.1038/s41467-025-56176-3" target="_blank" rel="noreferrer noopener">Nature Communications</a>, may help us gauge what could lie ahead in our current era of rapid climate change.



<h2 class="wp-block-heading" id="h-climate-clues-from-ancient-plant-dna">Climate clues from ancient plant DNA</h2>



“Everyone knows that the woolly mammoth went extinct, but virtually no-one mentions the <a href="https://www.earth.com/news/saving-earths-most-endangered-plants-from-extinction-proving-difficult-botanic-gardens/" target="_blank" rel="noreferrer noopener">plants</a> that were lost at the end of the last ice age,” said Ulrike Herzschuh, a scientist at AWI. “Until recently, we lacked suitable methods for investigating the extinction of plant species in detail.”



Traditionally, scientists studied fossil pollen to learn about past vegetation, but pollen cannot reliably reveal extinct species or pinpoint which ones died out.



The AWI team employed advanced methods to scrutinize old DNA fragments deposited in lake sediments taken from Alaska and Siberia.&nbsp;



“Using cutting-edge methods, we analysed old DNA from sediment cores taken from lakes in Alaska and Siberia, which allowed us to reconstruct the changes in vegetation in these regions,” Herzschuh explained.&nbsp;



Those cores, containing up to 30,000-year-old plant DNA, were enriched, sequenced, and matched with existing genetic databases in specialized labs.



<h2 class="wp-block-heading" id="h-plant-interactions-changed-with-the-climate">Plant interactions changed with the climate</h2>



The scientists used their data to chart where and when plant species emerged or disappeared across Siberia and Alaska, unlocking details about how plant communities evolved toward the end of the last ice age.&nbsp;



“We’ve now been able to determine in detail when and where species appeared and disappeared in Alaska and Siberia,” said Herzschuh. 



“Our research shows that the composition of plant species changed substantially at the end of the last ice age, and that this was accompanied by fundamental changes in the ecological conditions.”



Crucially, they found a link between temperature shifts and <a href="https://www.earth.com/news/warming-climates-force-plants-to-compete-with-each-other/" target="_blank" rel="noreferrer noopener">plant-to-plant interactions</a>. During colder periods, plant species often supported one another, while in warmer periods, they primarily competed. 



“In the DNA from the lake sediments, we found e.g. many cushion plants, which most likely supported the expansion of other species by forming sheltered habitats,” Herzschuh noted.&nbsp;



In the modern Arctic, however, this helpful role might speed the cushion plants’ own decline.&nbsp;



“Since the warming of the Arctic has already progressed quite far, woody plants can survive even in the high latitudes. The cushion plants could facilitate their spreading, hastening their own extinction in the process,” explained Herzschuh.



<h2 class="wp-block-heading" id="h-the-disappearance-of-entire-vegetation-types">The disappearance of entire vegetation types</h2>



The end of the last ice age triggered the loss of key types of vegetation, as the researchers confirmed using their new method. For instance, the mammoth steppe - a vast, grassy biome widespread during the ice age - vanished during the Earth’s transition to the current warm phase.&nbsp;



Identifying which species ceased to exist posed a particular challenge since modern DNA databases only catalog living plants.



“To identify the species that no longer existed, we had to use a trick,” Herzschuh said. They sifted through all DNA fragments in the sediment cores and systematically ruled out those resembling any species still alive. What remained were sequences likely belonging to extinct plants.&nbsp;



From this analysis, the experts concluded that <a href="https://www.earth.com/news/growing-perennial-grasses-could-help-curb-climate-change/" target="_blank" rel="noreferrer noopener">grasses</a> and shrubs are among those most at risk in a warming climate, while woody plants typically expand under warmer conditions. A surprising discovery was the time lag. 



“That means the full impacts of today’s human activities might not become apparent until the distant future,” Herzschuh added.



<h2 class="wp-block-heading" id="h-implications-for-today-s-arctic">Implications for today’s Arctic</h2>



The researchers emphasize that their findings offer essential reference data for assessing ongoing Arctic shifts, where the climate is changing more rapidly than almost anywhere else on Earth.&nbsp;



Their two new studies illustrate how warming influences not only individual species but also their ecological interactions - and how these changes may lead to permanent shifts in <a href="https://www.earth.com/news/arctic-biodiversity-will-get-a-boost-from-rising-temperatures/" target="_blank" rel="noreferrer noopener">biodiversity</a>.



“Our studies show how important it is to understand biodiversity and ecological interactions, also in the long term, in order to better predict the impacts of climate change,” Herzschuh said. “Using the information locked in old DNA from sediments, we can gain the fundamental knowledge needed to do so.”



By establishing extinction rates for ancient plants and examining how temperature-induced stressors remolded their communities, the research provides a valuable lens through which to view future risks.&nbsp;



The team hopes that comparing past extinctions with current conditions can guide policymakers and conservationists in predicting - and possibly mitigating - the fate of today’s Arctic and global ecosystems, which face many of the same pressures that once toppled the woolly mammoth and its lesser-known plant neighbors.



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Lessons from the ice age: How climate change reshapes plant life

Global warming has already contributed to an alarming decline in...

The Arabian Peninsula, known for its severe and arid climatic conditions, might have had a drastically different climate in the past.



A new study reveals that Arabia historically received higher levels of rainfall, shattering notions about the region’s long-term arid climate stability.



The research was conducted by experts from the University of Miami Rosenstiel School of Marine, Atmospheric, and Earth Science. 



The findings hold significant implications for urbanization trends in the Middle East, signaling a need for comprehensive planning to combat possible extreme <a href="https://www.earth.com/news/extreme-rainfall-increases-as-a-direct-result-of-global-warming/" target="_blank" rel="noreferrer noopener">weather risks</a>. 



The research emphasizes the importance of harnessing past data for predicting and preparing for the future.



<h2 class="wp-block-heading" id="h-arabia-once-had-abundant-rainfall">Arabia once had abundant rainfall</h2>



Contrary to the present barren desert, Arabia boasted of lush greenery thousands of years ago, sustained by consistent rainfall. 



The region, home to a diverse array of wildlife, including lions, leopards, and wolves, was far wetter than it is now in the last 2,000 years.



The researchers investigated the region's historical rainfall patterns. They found that rainfall was twice as much as it is today 200 years ago, and five times higher 400 years ago.



The results of the study indicate that the region has always been subjected to extreme <a href="https://www.earth.com/news/extreme-summer-rainfall-events-have-increased-in-the-u-s/" target="_blank" rel="noreferrer noopener">weather</a> fluctuations.



<h2 class="wp-block-heading" id="h-consequences-of-climate-variations">Consequences of climate variations</h2>



The swift pace of urbanization in the Middle East raises concerns about the potential aftermath of unexpected alterations in rainfall patterns. The infrastructure, shaped with the assumption of a stable climate, might not be equipped to withstand sudden <a href="https://www.earth.com/news/rainfall-is-increasingly-unpredictable-due-to-climate-change/" target="_blank" rel="noreferrer noopener">climatic changes</a>.



Sam Purkis, the study’s lead author, is a professor at the <a href="https://welcome.miami.edu" target="_blank" rel="noreferrer noopener">University of Miami</a> Rosenstiel School.



"As major development projects like <a href="https://www.neom.com/en-us" target="_blank" rel="noreferrer noopener">NEOM</a> in Saudi Arabia continue to reshape the landscape, these findings underscore the critical need for enhanced climate resilience and disaster preparedness to address the growing threat of extreme weather events in the region,” noted Professor Purkis.



<h2 class="wp-block-heading" id="h-deep-sea-sediments-reveal-arabia-s-rainfall-history">Deep-sea sediments reveal Arabia’s rainfall history</h2>



The researchers used deep-sea sediment from a brine pool in the Gulf of Aqaba, part of the northern Red Sea, to reconstruct past rainfall patterns. 



The unique chemistry of the brine splendidly preserved the sediment layers for centuries. These layers offer precise records of past rainfall patterns, enabling a more accurate understanding of long-term climate trends.



Recent trends have shown a rise in extreme <a href="https://www.earth.com/news/forecasting-the-floods-new-clues-about-extreme-rainfall/" target="_blank" rel="noreferrer noopener">weather</a> events in the Middle East, heightening the region's vulnerability to climate change. 



The winter of 2024 saw disastrous flooding across the Arabian Peninsula, emphasizing the need for climate adaptation to be prioritized by policymakers, urban planners, and scientists.



“This is a key record to fill in the history of the Middle Eastern climate. What it tells us is that the climate, both the average and the extremes, can change dramatically in this region, and the assumption of long-term climate stability in future development is not a good one,” noted Amy Clement, a professor at the University of Miami Rosenstiel School.



<h2 class="wp-block-heading" id="h-equipping-for-a-unpredictable-future">Equipping for a unpredictable future</h2>



The study accentuates the need for improved planning and adaptation, as human development in the region becomes increasingly exposed to extreme weather consequences. 



It also highlights the criticality of considering long-term climate patterns while designing new infrastructure and cities.



Scientific advancements have significantly bolstered climate research, permitting a more accurate understanding of historical climate patterns. 



“Utilizing the technology on OceanXplorer in combination with multidisciplinary experts in ocean and climate science we can further our understanding of the linkages between ocean systems and long-term weather and climate trends, to help at-risk areas be ready for the future,” noted Mattie Rodrigue, science program director at <a href="https://oceanx.org" target="_blank" rel="noreferrer noopener">OceanX</a>.



<h2 class="wp-block-heading" id="h-learning-from-arabia-s-rainfall-history">Learning from Arabia's rainfall history</h2>



The study, A 1,600-Year Record of Extreme Rainfall in Northern Arabia, is pivotal in understanding how the climate of the Arabian Peninsula has evolved over the centuries. 



While we might not have the power to control natural climate <a href="https://www.earth.com/news/astonishing-global-heat-in-january-2025-defied-climate-expectations/" target="_blank" rel="noreferrer noopener">changes</a>, it is within our capacity to determine how effectively we adapt to these variations.



Therefore, it is imperative for governments, researchers, and urban planners to collaboratively create a future that effectively navigates the challenges posed by a rapidly changing climate, drawing valuable lessons from the past.



The study is published in the journal <a href="https://www.science.org/doi/10.1126/sciadv.adq3173" target="_blank" rel="noreferrer noopener">Science Advances</a>.



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Arabia’s surprising rainfall history: Clues buried in the deep sea

The Arabian Peninsula, known for its severe and arid climatic...

Improvements in human life expectancy throughout Europe have slowed significantly since 2011, with England experiencing the largest slowdown, according to a new study. 



The research, led by the <a href="https://www.uea.ac.uk/" target="_blank" rel="noreferrer noopener">University of East Anglia</a> (UEA), identifies poor diets, physical inactivity, obesity, and the COVID-19 pandemic as major factors contributing to this shift. 



The experts warn that instead of living increasingly longer than older generations, many people now face the possibility of earlier mortality.



“Advances in public health and medicine in the 20th Century meant that <a href="https://www.earth.com/news/women-in-the-us-now-live-6-years-longer-than-men-as-life-expectancy-gap-widens/" target="_blank" rel="noreferrer noopener">life expectancy</a> in Europe improved year after year. But this is no longer the case,” said professor Nick Steel, from UEA’s Norwich Medical School.



<h2 class="wp-block-heading" id="h-decreases-in-life-expectancy">Decreases in life expectancy </h2>



From 1990 to 2011, lower death rates from <a href="https://www.earth.com/news/climate-change-worsens-cardiovascular-health-risks/" target="_blank" rel="noreferrer noopener">cardiovascular diseases</a> and cancers steadily increased average life expectancy across the continent. But the study found that between 2011 and 2019, progress stagnated as major risk factors like obesity, high blood pressure, and high cholesterol either rose or stopped improving in virtually all European nations.



“We found that deaths from cardiovascular diseases were the primary driver of the reduction in life expectancy improvements between 2011–19. Unsurprisingly, the <a href="https://www.earth.com/news/life-expectancy-fell-sharply-during-the-covid-19-pandemic/" target="_blank" rel="noreferrer noopener">Covid pandemic</a> was responsible for decreases in life expectancy seen between 2019–21,” explained Steel.



Researchers highlight that while improved treatments for high cholesterol and blood pressure have helped, they haven’t offset the harmful effects of increasingly unhealthy lifestyles.&nbsp;



As the pandemic further eroded longevity figures after 2019, the concern is that people may begin dying younger unless governments take robust action.



<h2 class="wp-block-heading" id="h-government-policies-targeting-health-risks">Government policies targeting health risks </h2>



Among 19 European countries studied, England showed the sharpest reduction in life expectancy growth following 2011, a trend mirrored to varying degrees in the rest of the UK.&nbsp;



In contrast, some nations, including Norway, Iceland, Sweden, Denmark, and Belgium, managed better resilience. They also had stronger policies targeting health risks and a more favorable record in controlling major cardiovascular threats.



“In contrast, England and the other UK nations fared worst after 2011 and also during the Covid pandemic, and experienced some of the highest risks for heart disease and <a href="https://www.earth.com/news/ai-is-the-next-frontier-in-cancer-treatment/" target="_blank" rel="noreferrer noopener">cancer</a>, including poor diets,” Steel said. 



“This suggests that stronger government policies are needed to reduce major health risks including obesity, poor diet, and low physical activity - to improve population health over the long term.”



<h2 class="wp-block-heading" id="h-can-human-life-expectancy-still-improve">Can human life expectancy still improve?</h2>



The study emphasizes that rising longevity is still possible. “Life expectancy for older people in many countries is still improving, showing that we have not yet reached a natural longevity ceiling,” Steel explained. By focusing on preventing early deaths - chiefly among younger adults - there is ample room to reduce mortality.



“These results are a cause for concern especially here in the UK, but also some hope,” said John Newton, a scientist at the European Center for Environment and Human Health at the <a href="https://www.exeter.ac.uk/" target="_blank" rel="noreferrer noopener">University of Exeter</a>.



“We should be concerned because many European countries including the UK are showing such poor progress but hopeful because addressing the underlying causes of major illnesses appears to be effective if only improvements in the key risks can be sustained.”&nbsp;



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



Sarah Price, National Director of Public Health at <a href="https://www.england.nhs.uk/" target="_blank" rel="noreferrer noopener">NHS England</a>, said the findings highlight a need for stronger measures to tackle cardiovascular disease and cancer at their roots.



“The slowdown in life expectancy improvements, particularly due to cardiovascular disease and cancer, highlights the urgent need for stronger action on the root causes - poor diet, physical inactivity, and obesity.”



Although the NHS offers weight management programs and widespread blood pressure checks to curb these conditions, Price emphasized that government intervention is crucial to address the broader societal drivers of obesity and unhealthy lifestyles. “We cannot treat our way out of the <a href="https://www.earth.com/news/childhood-obesity-rates-are-surging-worldwide/" target="_blank" rel="noreferrer noopener">obesity</a> crisis, and we need to stem it at source,” she said.



<h2 class="wp-block-heading" id="h-reversing-the-human-life-expectancy-trend">Reversing the human life expectancy trend</h2>



Overall, the study found that while the European public enjoyed steady life expectancy gains for decades, those gains have lately diminished - mostly due to unhealthy diets, lack of exercise, and the pandemic’s toll.&nbsp;



According to the researchers, reversing this trend depends on decisive actions, from healthier lifestyle promotion to better policy frameworks.



In short, a coordinated public health response that prioritizes dietary changes, physical activity, and tackling obesity may help restore the upward curve in life expectancy. Otherwise, Europe’s younger generations risk shorter lifespans than those who came before them.



The study is published in the journal <a href="http://dx.doi.org/10.1016/S2468-2667(25)00009-X" target="_blank" rel="noreferrer noopener">The Lancet Public Health</a>.



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Human life expectancy faces a triple threat 

Improvements in human life expectancy throughout Europe have slowed significantly...

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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

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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

[sendtonews key="LvS8v8bp9z-2564889-12187" 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 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

[sendtonews key="iuA5mpp3jv-1641775-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="QGPzYnXEtN-1712599-12187" type="single"]</div>



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...

Golden eagle (Aquila chrysaetos) Photo Credit: Denisa Mikesova

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A black-backed Jackal (Canis mesomelas) running, Kalahari desert, South Africa Photo Credit: ECO Print

Golden Eagle

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