Today's Image of the Day from the European Space Agency features the barred spiral galaxy NGC 1559, located around 35 million light-years away in the southern constellation Reticulum. The image was captured by the James Webb Space Telescope. 



<h2 class="wp-block-heading" id="h-fuel-for-star-formation">Fuel for star formation </h2>



"The data featured in this portrait make use of two of Webb’s instruments: the Mid-InfraRed Instrument (MIRI) and Near-InfraRed Camera (NIRCam)," noted <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">ESA</a>.



"Here MIRI captures the glow of interstellar dust grains, which trace out the interstellar medium, the fuel for future star formation. NIRCam shows the light from stars, even young stars hidden behind prodigious amounts of dust. NIRCam also captures emission from ionised nebulae around young stars."



<h2 class="wp-block-heading" id="h-webb-reveals-galaxies-in-new-light">Webb reveals galaxies in new light</h2>



According to ESA, the data was collected by the <a href="https://sites.google.com/view/phangs/home">PHANGS team</a> as part of a program in which Webb will observe 55 <a href="https://www.earth.com/news/james-webb-captures-galaxies-that-are-too-old-to-exist/">galaxies</a> that have also been mapped by the Atacama Large Millimeter/submillimeter Array (ALMA) radio telescope, the Hubble Space Telescope, and more.&nbsp;



"By combining Webb’s unprecedented view of the dust and stars with data from these other facilities, the team aims to obtain a new, highly detailed view of how stars are born, live, and die in galaxies across the Universe."



<h2 class="wp-block-heading" id="h-ngc-1559-a-loner-in-space">NGC 1559: A loner in space</h2>



Although NGC 1559 appears to sit close to one of our nearest neighbors in the sky - the Large Magellanic Cloud (LMC) - this is just a trick of perspective, noted ESA.



While it is part of the Reticulum constellation, NGC 1559 is not part of the Local Group of galaxies but instead resides in a more distant region of space.



"In reality, NGC 1559 is physically nowhere near the LMC in space; in fact it truly is a loner, lacking the company of any nearby galaxies or membership of any galaxy cluster."



<h2 class="wp-block-heading" id="h-star-formation-in-ngc-1559">Star formation in NGC 1559</h2>



NGC 1559 is notable for its active star formation and strong magnetic fields. It has also been the site of several <a href="https://www.earth.com/news/supernova-explosions-could-damage-distant-planets/" target="_blank" rel="noreferrer noopener">supernovae</a>, making it of particular interest to astronomers studying stellar evolution and the lifecycle of stars.



The structure of NGC 1559 includes well-defined spiral arms that are rich in young, hot stars and regions of ionized gas, indicative of ongoing <a href="https://www.earth.com/news/black-hole-is-starving-its-host-galaxy-of-star-forming-fuel/" target="_blank" rel="noreferrer noopener">star formation</a>.



The galaxy’s central bar is believed to play a role in driving gas towards the core, fueling both the star formation and the activity around its nucleus.



<h2 class="wp-block-heading" id="h-an-extragalactic-wonder">An extragalactic wonder</h2>



Despite being relatively small compared to larger galaxies like the Milky Way, NGC 1559 is an important object for understanding how barred spiral galaxies evolve and the processes that trigger supernovae.



The galaxy’s remote location and active nature make it a fascinating subject of study in the field of extragalactic astronomy. The isolation of NGC 1559 allows for a clearer view of its structure without much interference from neighboring galaxies.



<h2 class="wp-block-heading" id="h-barred-spiral-galaxies">Barred spiral galaxies</h2>



Barred spiral galaxies are a type of spiral galaxy characterized by a central bar-shaped structure composed of stars. This bar extends out from the core and connects to the galaxy's spiral arms, which swirl outward in a graceful pattern.



Scientists believe that the bar plays a crucial role in the evolution of the galaxy, funneling gas towards the core and potentially triggering star formation or feeding a central black hole. 



The <a href="https://www.earth.com/news/newly-discovered-stars-milky-way-are-old-as-universe/" target="_blank" rel="noreferrer noopener">Milky Way</a>, our own galaxy, is an example of a barred spiral. These galaxies are quite common in the universe, making up about two-thirds of all observed spiral galaxies.



The bar itself is thought to be a temporary feature, developing as the galaxy matures and possibly disappearing over time as the dynamics of the stars change. 



<h2 class="wp-block-heading" id="h-the-reticulum-constellation">The Reticulum constellation</h2>



The Reticulum constellation is a small, faint constellation in the southern sky. Its name means "the reticle" in Latin, which refers to the crosshairs in an eyepiece of a telescope. 



The constellation was named in the 18th century by the French astronomer Nicolas Louis de Lacaille to honor the reticle he used in his scientific instruments. It is one of the 88 modern constellations recognized by the International Astronomical Union.



Image Credit: ESA/Webb, NASA &amp; CSA, A. Leroy, J. Lee and the PHANGS Team



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Spiral galaxy NGC 1559 is a loner in outer space

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

Today's Image of the Day from the European Space Agency features the barred spiral galaxy NGC 3783, which is located about 130 million light-years away in the constellation Centaurus. 



NGC 3783 is also the most prominent of a galaxy group (by the same name) that contains 47 galaxies. 



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



“Like galaxy clusters, galaxy groups are aggregates of gravitationally bound galaxies. Galaxy groups, however, are less massive and contain fewer members than <a href="https://www.earth.com/news/titanic-galaxy-cluster-collision-defies-all-current-understanding-of-the-universe/" target="_blank" rel="noreferrer noopener">galaxy clusters</a> do: where galaxy clusters can contain hundreds or even thousands of constituent galaxies, galaxy groups do not typically include more than 50,” noted <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">ESA</a>.



“The Milky Way is actually part of a galaxy group, known as the Local Group, which contains two other large galaxies (Andromeda and the Triangulum galaxy), as well as several dozen satellite and dwarf galaxies.”



<h2 class="wp-block-heading" id="h-hd-101274-a-blue-giant-star">HD 101274: A blue giant star</h2>



The bright object that appears to the right of the galaxy is the star HD 101274. “The perspective in this image makes the star and the galaxy look like close companions, but this is an illusion. HD 101274 lies only about 1,530 light-years from Earth, meaning it is about 85 thousand times closer than NGC 3783,” explained ESA.&nbsp;



The star is part of the NGC 3766 cluster, which is sometimes referred to as the Pearl Cluster, an open cluster known for its richness in bright stars and its relatively young age.



HD 101274 is categorized as a blue giant star, characterized by its high temperature and luminosity. 



Blue giants are massive stars that have left the main sequence phase of stellar evolution and are burning helium or heavier elements in their cores. These stars are known for their short lifespans relative to smaller stars due to their rapid consumption of nuclear fuel.



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



<a href="https://www.earth.com/news/dark-stars-scientists-discover-a-new-type-of-star-powered-by-dark-matter/" target="_blank" rel="noreferrer noopener">Stars</a> like HD 101274 are important for astronomers because they help in studying the properties of stellar populations in clusters and the dynamics of stellar evolution in different environments. 



The spectral and photometric observations of such stars can provide valuable insights into the characteristics of their atmospheres, internal structures, and the processes occurring within and around them.



<h2 class="wp-block-heading" id="h-bright-central-region-of-ngc-3783">Bright central region of NGC 3783</h2>



One of the most interesting aspects of NGC 3783 is that it harbors an active galactic nucleus, meaning its central region is exceptionally luminous, likely due to the presence of a supermassive black hole. This black hole is actively accreting material, which emits a substantial amount of radiation as it spirals inward and heats up.



The galaxy is particularly known for its bright central region and has been studied extensively in the ultraviolet and X-ray light spectra to understand better the properties of the accretion disk around the black hole and the complex dynamics of the material surrounding it. These studies are crucial for understanding the physics of active galactic nuclei and the role they play in <a href="https://www.earth.com/news/galaxies-like-our-own-milky-way-are-not-unique/" target="_blank" rel="noreferrer noopener">galaxy evolution</a>.



According to ESA, NGC 3783 is a&nbsp;Type I Seyfert galaxy. “In this image it is recorded by Hubble in incredible detail, from its glowing central bar to its narrow, winding arms and the dust threaded through them, thanks to five separate images taken in different wavelengths of light," noted ESA.



“In fact, the galactic center is bright enough to Hubble that it exhibits diffraction spikes, normally only seen on stars such as HD 101274.”



<h2 class="wp-block-heading" id="h-more-about-the-ngc-3783-galaxy-group">More about the NGC 3783 galaxy group</h2>



The NGC 3783 group is part of the larger Hydra-Centaurus Supercluster, which itself is a massive collection of <a href="https://www.earth.com/news/shapes-of-one-million-galaxies-hint-at-the-universes-origins/" target="_blank" rel="noreferrer noopener">galaxies</a> and galaxy clusters located primarily in the constellations of Hydra and Centaurus.



The NGC 3783 group consists of several galaxies that are gravitationally bound and interact with each other. These interactions can influence the galaxies' evolution through mechanisms like tidal forces and merger events, which can trigger star formation, fuel central black holes, and reshape the galaxies' structures.



Studying groups like the NGC 3783 group helps astronomers understand how <a href="https://www.earth.com/news/ceers-2112-ancient-galaxy-looks-strikingly-similar-to-ours/" target="_blank" rel="noreferrer noopener">galaxies</a> evolve together in a common gravitational environment, offering insights into the dynamics and evolution of structures on cosmic scales. 



Image Credit: ESA/Hubble &amp; NASA



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Luminous galaxy NGC 3783 and a blue giant star

Today's Image of the Day from NASA Earth Observatory features Cyclone Chido, an intense tropical cyclone that caused unprecedented devastation across Southeast Africa in December 2024.



On December 14, Chido struck the islands of Mayotte with wind speeds exceeding 200 km/h (124 mph) and gusts over 225 km/h (140 mph), marking it as the most powerful storm to hit the French territory in at least 90 years.&nbsp;



The <a href="https://www.earth.com/news/fast-moving-tropical-cyclones-are-becoming-more-powerful/" target="_blank" rel="noreferrer noopener">cyclone</a> ultimately made three landfalls - all with winds equivalent to those of a Category 4 tropical cyclone. According to media reports, authorities in Mayotte fear that hundreds and possibly thousands of people have died.



<h2 class="wp-block-heading" id="h-rapid-intensification-of-chido">Rapid intensification of Chido</h2>



“Chido formed in the southeastern Indian Ocean on December 5, 2024. The disturbance rapidly intensified before hitting the Mauritian islands of Agaléga on December 11. The next day, the cyclone peaked in intensity, with sustained winds of about 250 kilometers (155 miles) per hour - equivalent to a strong Category 4 hurricane on the Saffir-Simpson wind scale,” noted <a href="https://earthobservatory.nasa.gov/images/153708/cyclone-chido-pummels-mayotte" target="_blank" rel="noreferrer noopener">NASA</a>.&nbsp;&nbsp;



“According to the Joint Typhoon Warning Center, Cyclone Chido continued to move west in an environment favorable for sustaining storms. That included warm <a href="https://www.earth.com/news/ocean-warming-has-nearly-doubled-in-the-last-decade/" target="_blank" rel="noreferrer noopener">sea surface temperatures</a> of up to 29 degrees Celsius (84 degrees Fahrenheit) and low vertical wind shear.



<h2 class="wp-block-heading" id="h-devastation-of-cyclone-chido-nbsp">Devastation of Cyclone Chido&nbsp;</h2>



The cyclone obliterated entire neighborhoods, particularly in hillside shantytowns inhabited by undocumented migrants. Official reports confirm at least 31 fatalities and thousands of injuries - though the actual death toll may be significantly higher.&nbsp;



The destruction in Mayotte's capital, Mamoudzou, has left approximately 100,000 people homeless. The aftermath has been characterized by a lack of visible assistance from authorities, with residents relying on community support amid concerns over hunger, disease outbreaks, and lawlessness.&nbsp;



<h2 class="wp-block-heading" id="h-landfall-in-mozambique-nbsp">Landfall in Mozambique&nbsp;</h2>



Following its impact on Mayotte, Chido continued westward, making landfall in Mozambique on December 15 near the city of Pemba as a strong Category 4-equivalent intense tropical cyclone.&nbsp;



The storm resulted in at least 34 deaths and 43 injuries across three northern provinces. In neighboring Malawi, Chido claimed two lives.&nbsp;



The cyclone's ferocity, fueled by warmer ocean temperatures attributed to climate change, has raised concerns about the increasing frequency and <a href="https://www.earth.com/news/coastal-hurricanes-are-intensifying-faster-due-to-climate-change/" target="_blank" rel="noreferrer noopener">intensity</a> of such storms in the region.&nbsp;



<h2 class="wp-block-heading" id="h-recovery-efforts-and-vulnerable-communities-nbsp">Recovery efforts and vulnerable communities&nbsp;</h2>



The crisis has highlighted the vulnerabilities of affected regions, particularly Mayotte, which faces challenges of poverty, overcrowding, and inadequate infrastructure.&nbsp;



The lack of preparedness and insufficient emergency response have drawn criticism, highlighting the need for improved disaster management and investment in resilient infrastructure to mitigate the impacts of future climate-induced disasters.&nbsp;



In response to the disaster, French President Emmanuel Macron is scheduled to visit Mayotte, and relief efforts are underway, including the arrival of a ship carrying 180 tons of aid.&nbsp;



However, the scale of destruction and ongoing challenges in delivering assistance to remote and inaccessible areas continue to impede recovery efforts.&nbsp;



<h2 class="wp-block-heading" id="h-climate-fueled-intensification-of-cyclones-nbsp">Climate-fueled intensification of cyclones&nbsp;</h2>



The <a href="https://www.earth.com/news/the-rising-impact-of-tropical-cyclones-in-a-warming-world/" target="_blank" rel="noreferrer noopener">intensification of cyclones</a> due to climate change is a significant and concerning phenomenon. As global temperatures rise, warmer ocean waters provide the energy that fuels tropical cyclones, making them stronger and more destructive.&nbsp;



Higher <a href="https://www.earth.com/news/pacific-ocean-temperatures-highest-in-650-years-greatly-harming-coral-reefs/" target="_blank" rel="noreferrer noopener">sea surface temperatures</a> lead to increased evaporation, which adds more moisture to the atmosphere. This moisture can enhance the rainfall associated with cyclones, increasing the risk of flooding.&nbsp;



Additionally, rising sea levels, driven by the melting of polar ice caps and thermal expansion of seawater, exacerbate storm surge impacts, causing more extensive and severe coastal flooding during cyclonic events.



Changes in atmospheric conditions also play a role. While climate change may not increase the overall frequency of cyclones, it is likely to shift the distribution and intensity of these storms. For instance, studies suggest that a larger proportion of cyclones are reaching the most intense categories.&nbsp;



Furthermore, slower-moving cyclones, a trend linked to weakened steering currents, can linger longer over vulnerable areas, compounding the damage with prolonged heavy rainfall and strong winds.



These changes in cyclone behavior present challenges for disaster preparedness and response. Coastal communities, particularly in low-lying regions, are becoming increasingly vulnerable to the compounded impacts of more powerful storms, highlighting the urgent need for climate mitigation and adaptation strategies.



The image was captured by the VIIRS (Visible Infrared Imaging Radiometer Suite) on the NOAA-20 satellite, about three hours after the storm made landfall.



Image Credit: NASA Earth Observatory&nbsp;



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Cyclone Chido’s path of destruction: A climate wake-up call

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

Today's Image of the Day from NASA Earth Observatory features a 9.5-mile section of Pangong Lake on the western end of the Tibetan Plateau. The image was captured by a crew member onboard the International Space Station. 



“In this winter scene, a sheet of cracked ice tops part of the lake,” noted <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA</a>. “On the left side, open water appears blue. Shallow water offshore of a delta, formed by a small, winding river, appears green."



"Parallel lines along the coastlines of bays are visible in the high-resolution version of this image. These lines indicate raised beaches, which formed in the past when lake levels were higher.”



NASA pointed out that several roads cut across the landscape, including one with switchbacks that ascends a steep slope. "These roads facilitate tourist travel from both India and China.”&nbsp;



<h2 class="wp-block-heading" id="h-migratory-birds-at-pangong-lake-nbsp">Migratory birds at Pangong Lake&nbsp;</h2>



Pangong Lake and its surroundings are home to numerous bird species, particularly <a href="https://www.earth.com/news/migratory-birds-burn-unexpected-amounts-of-protein/" target="_blank" rel="noreferrer noopener">migratory birds</a>. Visitors can spot various waterfowl and waders that are rarely seen elsewhere.



“During the summer, species such as bar-headed geese and Brahminy ducks attract bird watchers to the lake, which is a major breeding ground for migrating birds,” said NASA.



Pangong Lake is one of the few places in India where the endangered black-necked crane is found during its breeding season. 



Ruddy shelduck and brown-headed <a href="https://www.earth.com/news/gulls-are-shifting-their-habitats-to-urban-areas/" target="_blank" rel="noreferrer noopener">gulls</a> are also frequently spotted around the lake. The ruddy shelduck is known for its striking orange-brown body and creamy white head, while the brown-headed gulls are often seen flying or swimming in the lake.



<h2 class="wp-block-heading" id="h-pangong-lake-nbsp">Pangong Lake&nbsp;</h2>



Pangong Lake is a stunning high-altitude lake situated in the <a href="https://www.earth.com/news/temperatures-are-rising-unexpectedly-fast-on-the-tibetan-plateau/" target="_blank" rel="noreferrer noopener">Himalayas</a>, extending from India to the Tibetan Autonomous Region of China. It is renowned for its mesmerizing beauty and dramatic setting, with the lake lying at an elevation of about 4,350 meters.



One of the most distinctive features of Pangong Lake is its changing colors, ranging from shades of blue to green and even red, influenced by the sky's reflection and the lake's mineral content.



This saline water lake is approximately 134 kilometers long and 5 kilometers wide at its broadest point. Despite its considerable size, Pangong Lake is relatively shallow.&nbsp;



The lake gained additional popularity after being featured in several Indian films - most notably the Bollywood hit "3 Idiots." Its remote location requires a permit for visitors, especially due to its proximity to the Line of Actual Control between India and China.



Despite the geopolitical sensitivities surrounding its location, Pangong Lake remains a favorite among tourists for its unparalleled natural beauty and serene environment.



<h2 class="wp-block-heading" id="h-high-altitude-lakes">High-altitude lakes</h2>



High-altitude lakes are unique bodies of water found at elevations typically above 3,000 meters (about 10,000 feet) in mountain ranges like the <a href="https://www.earth.com/news/himalayan-glaciers-retreating-threat-is-much-worse-than-previously-believed/" target="_blank" rel="noreferrer noopener">Himalayas</a>, Andes, and Rockies. 



These lakes are formed either by glacial activity, where glaciers erode the earth to create depressions that fill with melted snow and rainwater, or when natural dams created by landslides or moraines trap water in valleys.



<h3 class="wp-block-heading" id="h-extreme-environments">Extreme environments</h3>



The conditions at high altitudes make these lakes distinct in several ways. The climate is typically colder and harsher, with significant temperature variations between day and night. 



This extreme environment affects both the physical characteristics of 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">lakes</a> and the types of ecosystems they support. For example, due to lower atmospheric pressure, the boiling point of water is reduced, which can affect the type of life that can survive in these regions.



<h3 class="wp-block-heading" id="h-critical-habitats">Critical habitats</h3>



Biologically, high-altitude lakes often have limited biodiversity because only certain types of plants and animals can tolerate the cold temperatures and lower oxygen levels in the water. 



Despite this, these lakes are crucial habitats for some unique species of fish, birds, and other wildlife. They also serve as important indicators of climate change, as variations in their water levels and temperatures can reflect environmental shifts.



<h3 class="wp-block-heading" id="h-significance-of-high-altitude-lakes">Significance of high-altitude lakes </h3>



Lakes at high altitudes are often clear and pristine, due to the low density of human populations in these areas and minimal industrial activity, making them significant for ecological studies and attractive for tourism. 



However, they are sensitive ecosystems, and increased tourist activity brings challenges like pollution and habitat disruption.



High-altitude lakes are not only beautiful and scientifically significant but also hold cultural importance for local communities, often considered sacred and associated with historical and spiritual significance.



Image Credit: NASA Earth Observatory&nbsp;



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Pangong Lake on the Tibetan Plateau

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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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Young, massive stars in the Triangulum Galaxy

Today's Image of the Day from NASA Earth Observatory features the Fedchenko Glacier in the Pamir Mountains of Tajikistan. It is one of the world's longest glaciers outside of the polar regions.&nbsp;



“An astronaut aboard the International Space Station took this photo of glaciers in the high-elevation valleys of the Pamir Mountains of Central Asia. The upper portion of Fedchenko Glacier crosses the center of the scene.”



NASA noted that most of the larger glaciers in the image show a prominent pattern of light- and dark-brown parallel lines.&nbsp;



“The darker ‘streamlines,’ known as medial moraines, give a sense of the direction of flow of the ice down the valleys. These are concentrations of debris that has been eroded by the glacier from the adjacent mountainsides or a rocky outcrop,” said NASA.



<h2 class="wp-block-heading" id="h-fedchenko-a-high-altitude-glacier">Fedchenko: A high-altitude glacier</h2>



Fedchenko Glacier stretches for approximately 48 miles and covers an area of around 270 square miles. This massive glacier is a critical source of <a href="https://www.earth.com/news/satellites-reveal-a-sudden-drop-in-global-freshwater-levels/" target="_blank" rel="noreferrer noopener">freshwater</a>, feeding several rivers and influencing the region's hydrology.



Fedchenko Glacier lies at high altitudes, with its origins in the high peaks of the Pamirs, where snow accumulates heavily. Despite being situated in a relatively arid region, the glacier's significant size and volume are maintained by substantial snowfall.&nbsp;



Named after Alexei Pavlovich Fedchenko, a Russian explorer and naturalist, the glacier was first surveyed in 1928 during Soviet-era expeditions. It plays a crucial role in climate studies, as changes in its length and mass provide insights into the effects of global warming in Central Asia.&nbsp;



The glacier is also part of a spectacular and remote landscape, surrounded by towering <a href="https://www.earth.com/news/early-humans-preferred-the-mountains-and-it-changed-our-evolution/" target="_blank" rel="noreferrer noopener">mountains</a> and rugged terrain, making it a key feature of the Pamirs' natural beauty.&nbsp;



<h2 class="wp-block-heading" id="h-threats-to-glaciers-worldwide">Threats to glaciers worldwide</h2>



Like many glaciers worldwide, Fedchenko faces the threat of retreat due to <a href="https://www.earth.com/news/peru-has-lost-over-half-of-its-glaciers-in-six-decades/" target="_blank" rel="noreferrer noopener">global warming</a>, raising concerns about water availability and ecosystem changes in the region.



Rising global temperatures caused by greenhouse gas emissions are the primary driver of glacier melting. Warmer temperatures not only melt glacier surfaces but also increase the flow of meltwater beneath them, accelerating their disintegration.



<h3 class="wp-block-heading" id="h-human-activities-and-pollution-nbsp">Human activities and pollution&nbsp;</h3>



Deforestation and urbanization exacerbate these effects by reducing reflective snow cover and increasing heat absorption in nearby areas.&nbsp;



Airborne pollutants like soot and black carbon darken glacier surfaces, reducing their ability to reflect sunlight and speeding up the rate of melting. 



Industrial activities and tourism in glacier regions add physical stress and pollution, further degrading these fragile ecosystems.



<h3 class="wp-block-heading" id="h-water-supplies">Water supplies</h3>



The loss of glaciers has far-reaching consequences. It disrupts freshwater supplies for millions of people who depend on glacial runoff for drinking water, agriculture, and hydropower.&nbsp;



<h3 class="wp-block-heading" id="h-rising-sea-levels">Rising sea levels</h3>



<a href="https://www.earth.com/news/melting-glaciers-unleash-invasive-species-into-unexpected-areas/" target="_blank" rel="noreferrer noopener">Melting glaciers</a> contribute to rising sea levels, threatening coastal communities and ecosystems worldwide. Additionally, the loss of glaciers impacts biodiversity, as many species rely on cold, glacial habitats for survival.



<h3 class="wp-block-heading" id="h-protecting-glaciers">Protecting glaciers</h3>



Efforts to mitigate these threats focus on reducing <a href="https://www.earth.com/news/melting-glaciers-are-hidden-sources-of-greenhouse-gases/" target="_blank" rel="noreferrer noopener">greenhouse gas</a> emissions, protecting glacier regions from industrial exploitation, and promoting sustainable tourism practices.&nbsp;



However, without urgent action, the continued decline of glaciers will have profound implications for the planet's climate, water systems, and ecosystems.



<h2 class="wp-block-heading" id="h-the-pamir-mountains-nbsp">The Pamir Mountains&nbsp;</h2>



The Pamir Mountains, often called the "Roof of the World," are a vast and rugged mountain range located in Central Asia.&nbsp;



They span across Tajikistan, Afghanistan, China, and Kyrgyzstan, forming a vital part of the junction where the Himalayas, the Tian Shan, the Karakoram, the Kunlun, and the Hindu Kush converge.&nbsp;



With peaks soaring over 7,000 meters, including Ismoil Somoni Peak, the range is home to some of the highest altitudes on Earth.



The Pamir Mountains have been central to trade and cultural exchange for centuries, serving as a critical segment of the ancient Silk Road.&nbsp;



Today, the mountains are a popular destination for trekkers and explorers drawn by their breathtaking beauty and challenging terrain.



The Pamirs are not only a natural wonder but also a biological treasure trove, supporting unique wildlife that is adapted to extreme altitudes.&nbsp;



Culturally, the mountains are home to diverse communities, each with its unique traditions and ways of life, shaped by the harsh but majestic environment.



Image Credit: NASA Earth Observatory



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Fedchenko Glacier in the Pamir Mountains

Today's Image of the Day from <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA Earth Observatory</a> features a false-color image of Hurricane Otis on October 24, 2023. The following day, the storm slammed into Acapulco in the state of Guerrero as a category 5 storm. 



At the time this photo was captured by the VIIRS (Visible Infrared Imaging Radiometer Suite) sensor on the NOAA-20 satellite, Otis was still a tropical storm with sustained winds of 65 miles per hour, and was located about 210 miles south of Acapulco.&nbsp;



"Otis remained a tropical storm until the afternoon of October 24. Then, in a matter of hours, it rapidly intensified into a major hurricane. By 06:25 Universal Time (12:25 a.m. in Acapulco) on October 25, Otis made landfall near the beach resort town with sustained winds of 165 miles per hour," said NASA.



"According to news reports, Otis was the strongest hurricane on record to hit Mexico’s Pacific Coast, and the fastest-strengthening storm on record in the northeast Pacific."



Major damage to infrastructure, flooding, and mudslides have been reported in the state of Guerrero, and the extent of the destruction is still not clear. The government is scrambling to provide relief to those affected, deploying 8,400 members of Mexico's army, air force and national guard to help in the cleanup efforts.&nbsp;



Scott Braun, a research meteorologist at NASA’s Goddard Space Flight Center, said that Otis had “all the right ingredients” for rapid intensification.&nbsp;



“Conditions were present for rapid intensification, but it is hard to say at this time why the rate and magnitude of intensification were so great,” said Braun.



Image Credit: NASA Earth Observatory



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Hurricane Otis slammed into Acapulco as a category 5 storm

Patience is often regarded as a noble virtue, but its true essence may stem from how we handle life's relentless challenges and frustrations.



Kate Sweeny, a psychology scientist at <a href="https://www.ucr.edu/" target="_blank" rel="noreferrer noopener">UC Riverside</a>, suggests that patience might be less about our moral standing and more about how we handle the everyday irritations that life throws at us.



"Philosophers and religious scholars call patience a virtue, yet most people claim to be impatient," said Sweeny. "That made me wonder if maybe patience is less about being a good person and more about how we deal with day-to-day frustrations."



Sweeny conducted a study that was focused on defining what encompasses patience and impatience, and the factors that contribute to them.



<h2 class="wp-block-heading" id="h-interpreting-patience-and-impatience">Interpreting patience and impatience</h2>



<a href="https://www.earth.com/news/why-humans-hate-to-wait-and-what-our-impatience-says-about-us/" target="_blank" rel="noreferrer noopener">Impatience</a>, according to Sweeny, is the emotion experienced when encountering delays that seem unfair, unreasonable, or inappropriate - like heavy traffic during off-peak hours or a meeting dragging on well past its scheduled time.



In contrast, patience is how individuals cope with these feelings of impatience. Psychologists often refer to "<a href="https://www.earth.com/news/study-pinpoints-the-brain-regions-that-regulate-emotions/" target="_blank" rel="noreferrer noopener">emotion regulation</a>" as the range of strategies people use to adjust the intensity of their emotions.



In a companion theoretical paper, Sweeny emphasizes that patience represents a specific subset of these strategies, focusing on managing feelings of impatience.



<h2 class="wp-block-heading" id="h-the-perfect-storm-for-impatience">The "perfect storm" for impatience</h2>



The researchers identified three scenarios that form the ideal recipe for impatience: a critical situation (like a traffic jam on the way to a favorite band's concert), an uncomfortable waiting state (like a packed waiting room at the DMV), and when there's an obvious person to blame for the delay (such as the lab forgetting to process your medical tests).



People felt more impatient when a delay lasted longer than expected, although the actual length of the delay did not significantly impact their feelings of impatience.



To explore these frustrations, participants were asked to imagine their reactions to everyday aggravations, such as being stuck in traffic, enduring a tedious meeting, or waiting in a crowded room.



The individuals assessed how impatient these situations would make them feel and identified strategies to temper their impatience, including distraction techniques, deep <a href="https://www.earth.com/news/breathing-exercises-improve-focus-in-children-with-adhd/" target="_blank" rel="noreferrer noopener">breathing exercises</a>, or finding a silver lining in the situation.



<h2 class="wp-block-heading" id="h-the-spectrum-of-patience">The spectrum of patience</h2>



Interestingly, not everyone responded to these irritation-causing situations in the same way. Some were more patient than others. For instance, individuals who were more adaptable to open-ended situations and more emotionally stable displayed less impatience.



Moreover, those who had higher <a href="https://www.earth.com/news/emotional-intelligence-may-be-secret-to-academic-success/" target="_blank" rel="noreferrer noopener">emotional intelligence</a> and were better at self-regulation were also more patient, even if they initially felt impatient.



"Our initial findings support many of our ideas about patience and impatience. We have a lot still to learn, but our approach is quite promising in terms of helping people to manage feelings of impatience and ultimately become more patient in their daily lives," noted Sweeny.



These findings present a fresh perspective on patience and impatience - not as intrinsic qualities of a person, but as responses and <a href="https://www.earth.com/news/people-who-are-connected-with-nature-have-better-coping-skills/" target="_blank" rel="noreferrer noopener">coping</a> strategies we embrace when faced with the inevitable irritations of life.



<h2 class="wp-block-heading" id="h-patience-and-personality-traits">Patience and personality traits</h2>



The research sheds light on how personality traits influence an individual's ability to remain patient. People who demonstrate greater emotional stability and adaptability in uncertain situations are less likely to feel overwhelmed by impatience.



Additionally, individuals with high emotional intelligence, who excel in self-regulation and empathy, tend to manage feelings of impatience more effectively. 



Traits like agreeableness also play a crucial role in encouraging patience, as such individuals often approach frustrating scenarios with a calm and understanding mindset.



These findings highlight that patience is not just situational but also deeply rooted in personal characteristics, offering a promising avenue for developing interventions to cultivate patience in daily life.



<h2 class="wp-block-heading" id="h-implications-for-modern-life">Implications for modern life</h2>



In an increasingly fast-paced world, the study’s findings have significant applications.



The ability to manage impatience effectively is crucial in both personal and professional settings. For instance, workplaces can benefit from training programs focused on emotion regulation techniques, helping employees cope with stress and maintain productivity during challenging times.



Moreover, understanding the psychology of patience can aid in conflict resolution by promoting empathy and cooperation. 



On an individual level, strategies like mindfulness, reframing negative situations, and practicing gratitude can be integrated into daily routines to enhance emotional well-being and cultivate a more patient approach to life.



The full study was published in the journal <a href="https://journals.sagepub.com/doi/10.1177/01461672241284028" target="_blank" rel="noreferrer noopener">Personality and Social Psychology Bulletin</a>.



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Patience isn’t a virtue - it’s a coping strategy

Patience is often regarded as a noble virtue, but its...

Humans have a knack for getting around on two legs. Many of us take a long run for granted, trotting along city streets or forest trails without giving it much thought.



Unlike ancient human ancestors like Lucy, modern bodies power us forward at impressive speeds, with our muscles and tendons playing a crucial role.



But there was a time in our deep past when the earliest members of our family tree were nowhere near as quick. 



A new study published in the journal <a href="https://www.cell.com/current-biology/fulltext/S0960-9822(24)01566-5?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS0960982224015665%3Fshowall%3Dtrue" target="_blank" rel="noreferrer noopener">Current Biology</a> takes a careful look at the locomotive ability of one particular human ancestor, and the results are eye-opening.



The research was led by a team of natural scientists, musculoskeletal specialists, and evolutionary biologists affiliated with several institutions in the UK, in collaboration with a colleague from the Netherlands.



<h2 class="wp-block-heading" id="h-lucy-s-bones-reveal-her-running-skills">Lucy's bones reveal her running skills</h2>



Roughly 3.2 million years ago, a <a href="https://www.earth.com/news/human-evolution-was-shaped-by-competition-not-just-climate-change/" target="_blank" rel="noreferrer noopener">hominin</a> known as <a href="https://humanorigins.si.edu/evidence/human-fossils/species/australopithecus-afarensis" target="_blank" rel="noreferrer noopener">Australopithecus afarensis</a> lived in East Africa. Fossils of one of its most famous members, Lucy, were found in 1974 in <a href="https://asu.elsevierpure.com/en/publications/new-discoveries-of-pliocene-hominids-and-artifacts-in-hadar-inter" target="_blank" rel="noreferrer noopener">Ethiopia</a>, shedding light on how early human relatives stood and moved. Lucy’s skeleton showed that her species could walk upright on two legs, but her proportions and muscular arrangement were very different from what we see in humans today. After studying her frame using 3D computer simulations, the researchers concluded that Lucy could run on two legs, yet she never matched the speeds that come so naturally to modern humans.



<div class="wp-block-sendtonews-playerselector">[sendtonews key="zR3gqZFNZC-4149532-12187" type="single"]</div>



<h2 class="wp-block-heading" id="h-putting-lucy-s-running-speed-to-the-test">Putting Lucy’s running speed to the test</h2>



A digital model, shaped from Lucy’s <a href="https://www.earth.com/news/fossil-hotspots-may-skew-our-view-of-human-evolution/" target="_blank" rel="noreferrer noopener">fossil</a> bones and data from modern apes, allowed the experts to study how her leg muscles might have worked.



The team plugged these details into a computer program that tried countless ways of activating muscles, then picked the best way to run as fast and efficiently as possible. The results showed that even under ideal conditions, Lucy’s top speed was around 16 feet per second, much slower than a typical modern human who can easily push beyond 26 feet per second. “It’s a very thorough approach,” explained Herman Pontzer, an evolutionary anthropologist at Duke University.



<h2 class="wp-block-heading" id="h-searching-for-the-hidden-secret-in-muscles">Searching for the hidden secret in muscles</h2>



Modern humans have a special setup in the lower leg. Compared to an ancient hominin, we carry a more elastic Achilles tendon linked to shorter muscle fibers. 



This arrangement helps store and release energy during running, reducing the effort it takes to move forward. In Lucy’s time, these spring-like running features had not yet <a href="https://www.earth.com/news/early-humans-preferred-the-mountains-and-it-changed-our-evolution/" target="_blank" rel="noreferrer noopener">evolved</a>. Without them, even adding human-like muscles to her frame could not bring her speed up to modern standards. “This tells us that the body shape of A. afarensis is significantly limiting its running speed compared to that of modern humans,” said Karl Bates, an evolutionary biomechanics researcher at the <a href="https://www.liverpool.ac.uk/" target="_blank" rel="noreferrer noopener">University of Liverpool</a>.



<h2 class="wp-block-heading" id="h-what-speed-can-say-about-survival">What speed can say about survival</h2>



<a href="https://www.nature.com/articles/nature03052" target="_blank" rel="noreferrer noopener">Running</a> isn’t just about setting personal records. It plays a crucial role in how a species competes for food and escapes predators.



Modern humans, for example, can run long distances at a steady pace. By covering more ground, we found better opportunities to gather resources and cooperate. Lucy’s species - with smaller frames and without the muscular tricks of modern legs - might not have covered long distances very well.



<h2 class="wp-block-heading" id="h-how-body-shape-changed-over-time">How body shape changed over time</h2>



Long legs, a defined Achilles tendon, and specific muscle structures did not just appear overnight. Early hominins began with a body design that was good for standing and walking upright. Over generations, certain features shaped up, allowing humans to pick up the pace. As the genus Homo emerged, new body proportions offered better running ability, along with <a href="https://www.earth.com/news/humans-are-natural-born-endurance-runners/" target="_blank" rel="noreferrer noopener">improved endurance</a>. This shift provided real-world advantages to our ancestors. By moving faster and more efficiently, they could reach distant places, follow game animals, and expand into new environments.



<h2 class="wp-block-heading" id="h-features-that-help-humans-run">Features that help humans run </h2>



Walking upright and running well are not automatically the same thing. Lucy’s skeleton shows that even though her species walked on two legs, they did not run like we do. The skills and features that help humans run came along later. Instead of simply walking better and somehow becoming speedy runners, our ancestors had to accumulate changes one step at a time. Running was not just a byproduct of standing tall; it demanded its own unique tweaks to muscles and bones.



<h2 class="wp-block-heading" id="h-the-evolutionary-story-of-running">The evolutionary story of running </h2>



Studies that model ancient skeletons like Lucy offer a peek at how our <a href="https://www.earth.com/news/476000-year-old-ancient-woodworking-discovery-rewrites-early-human-history/" target="_blank" rel="noreferrer noopener">capabilities evolved</a>. By combining insights from fossils, simulations, and knowledge of modern muscle mechanics, scientists can understand how each piece of the puzzle fits together. The findings not only confirm that Lucy’s species lacked the running power of modern humans, they also highlight where in our evolutionary story those extra boosts emerged. 



The research reminds us that our ability to run long and hard is not an accident - it is the product of millions of years of subtle, meaningful changes. While Lucy’s top running speed and endurance might seem modest, she represents an <a href="https://www.earth.com/news/timeline-early-humans-great-migration-reached-america-challenged-again/" target="_blank" rel="noreferrer noopener">earlier chapter</a> in a long series of refinements.



By the time we arrived on the scene, we had the legs and lungs for distance. Though our modern world no longer requires daily runs to survive, the natural gift is still built into our bodies, waiting to be used.



The study is published in the journal <a href="https://www.cell.com/current-biology/fulltext/S0960-9822(24)01566-5" target="_blank" rel="noreferrer noopener">Current Biology</a>.



Video Credit: Current Biology (2024)



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Lucy could barely run - what does that say about our ancestors?

Humans have a knack for getting around on two legs....

Bright,,Red-dark,Quasar,In,Deep,Space.,Elements,Of,This,Image

Astronomers have identified a remarkable water reservoir hidden in a corner of the cosmos, circling a quasar more than 12 billion light-years away.



At that distance, the light we see today began its journey not too long after the universe itself formed. 



The water supply in this distant place is huge, containing the equivalent of about 140 trillion times all the water in Earth’s oceans combined.



This supply is sitting near a supermassive black hole that is about 20 billion times more massive than our sun. 



<a href="https://www.earth.com/news/oldest-black-hole-ever-discovered-dates-back-to-the-dawn-of-time/" target="_blank" rel="noreferrer noopener">The black hole</a> is surrounded by a quasar named APM 08279+5255, which pumps out as much energy as a thousand trillion suns. 



This quasar, according to astronomers, holds the farthest and largest known reservoir of water anywhere in the universe.



<h2 class="wp-block-heading" id="h-quasar-apm-08279-5255-and-its-water">Quasar APM 08279+5255 and its water</h2>



Matt Bradford, a scientist at NASA’s <a href="https://www.jpl.nasa.gov/" target="_blank" rel="noreferrer noopener">Jet Propulsion Laboratory</a> in Pasadena, Calif., leads one of the teams involved in the observations.



“The environment around this quasar is very unique in that it’s producing this huge mass of water,” said Matt Bradford. “It’s another demonstration that water is pervasive throughout the universe, even at the very earliest times.”



Both Bradford’s group and a separate team of astronomers studied APM 08279+5255 and its <a href="https://www.earth.com/news/massive-black-hole-is-seen-taking-a-nap-after-eating-too-much/" target="_blank" rel="noreferrer noopener">black hole</a>, which sits at the center and draws matter inward. 



As it does, it warms the surrounding gas and dust, forming an area filled with molecules that have never before been detected at such an immense distance.



<h2 class="wp-block-heading" id="h-understanding-quasars-the-basics">Understanding quasars -- the basics</h2>



Quasars were first noticed more than half a century ago when telescopes revealed puzzling sources of intense brightness in <a href="https://www.earth.com/news/hubble-took-the-closest-ever-image-of-a-quasar-and-captured-some-weird-things/" target="_blank" rel="noreferrer noopener">distant areas of space</a>. 



These objects are unlike any ordinary star. They shine brightly from the center of distant galaxies, outshining all their galaxy’s stars combined.



At their heart sit supermassive black holes, millions or billions of times heavier than our sun. As gas and dust spiral in toward one of these black holes, the swirling material heats up and <a href="https://www.earth.com/news/black-hole-jet-crashes-into-an-unidentified-object/" target="_blank" rel="noreferrer noopener">releases energy</a>. 



This energy blasts out across all kinds of wavelengths, making quasars some of the brightest, most energetic phenomena ever seen.



Observing quasars helps astronomers understand what the universe looked like long ago, since the light we see now began its journey billions of years in the past. 



Quasars can show how galaxies formed, how matter spread out, and how the earliest structures in the cosmos came together.



They can even help map the distribution of matter between galaxies, shining light on the regions that would otherwise remain unseen. 



Some quasars also launch <a href="https://www.earth.com/news/black-hole-jets-are-like-million-light-year-long-jedi-lightsabers/" target="_blank" rel="noreferrer noopener">huge jets of high-speed particles</a> that stretch across enormous distances. These jets can affect how stars form, influencing entire neighborhoods of cosmic material.



<h2 class="wp-block-heading" id="h-strange-place-to-find-water">Strange place to find water</h2>



Astronomers observed that water vapor is present in this quasar’s environment. It occupies a region spanning hundreds of light-years, with one light-year at around six trillion miles. 



Although the gas is thin by Earth standards, it is surprisingly warm and dense compared to what is typical in places like our <a href="https://www.earth.com/news/milky-ways-black-hole-formed-through-a-merger/" target="_blank" rel="noreferrer noopener">Milky Way</a>.



The temperature hovers around minus 63 degrees Fahrenheit, and the gas is roughly 300 trillion times less dense than Earth’s atmosphere. 



Still, it is about five times hotter and tens to hundreds of times denser than the gas seen in normal galaxies. With its unusual conditions, this region stands out as an unexpected find.



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



<a href="https://www.earth.com/news/oceans-of-water-vapor-may-be-involved-in-planet-formation/" target="_blank" rel="noreferrer noopener">Water vapor</a> is not just a molecule. Its presence here suggests that the quasar is bathing its environment in radiation that keeps the gas relatively warm. 



Astronomers also spotted other molecules, like carbon monoxide, hinting that there is an abundance of raw material that can feed the black hole as it continues to grow.



They estimate that there is enough gas for the <a href="https://www.earth.com/news/largest-map-of-supermassive-black-holes-unveiled/" target="_blank" rel="noreferrer noopener">black hole</a> to increase in size by about six times, although what actually happens next is not certain. 



Some of this gas may form new stars, while some might be thrown out into space instead. Either way, these measurements open a window into what conditions were like when the universe was still young.



<h2 class="wp-block-heading" id="h-quasars-water-and-life-s-building-blocks">Quasars, water, and life's building blocks</h2>



Detecting water vapor in such a distant quasar expands our knowledge of how <a href="https://www.earth.com/news/did-the-building-blocks-of-life-replicate-on-their-own/" target="_blank" rel="noreferrer noopener">building blocks</a> appear across vast stretches of time and space. 



Water is essential for life as we know it, and its presence billions of years ago suggests that the elements needed for life have been around for a very long time.



Beyond that, water plays a key role in shaping how stars and galaxies evolve. When gas clouds cool, water helps by allowing those clouds to collapse more easily, leading to star birth. 



By spotting it this far back, astronomers get new clues about how galaxies changed as the universe aged and matured.



<h2 class="wp-block-heading" id="h-how-they-found-the-water-quasar">How they found the water quasar</h2>



Bradford’s team began collecting data in 2008 with an instrument called Z-Spec at the California Institute of Technology’s Submillimeter Observatory (<a href="https://www.cso.caltech.edu/" target="_blank" rel="noreferrer noopener">CSO</a>). 



This 33-foot telescope sits near the summit of Mauna Kea in Hawaii. They later confirmed their findings using the Combined Array for Research in Millimeter-Wave Astronomy (<a href="https://www.mmarray.org/" target="_blank" rel="noreferrer noopener">CARMA</a>), a set of radio dishes located high in the Inyo Mountains of Southern California.



Meanwhile, another group led by Dariusz Lis, senior research associate in physics at Caltech and deputy director of the Caltech Submillimeter Observatory, used the Plateau de Bure Interferometer in the French Alps. 



In 2010, Lis’s team found hints of water in this quasar by detecting a single signature, while Bradford’s team uncovered multiple signals that revealed the massive amount of water present.



<h2 class="wp-block-heading" id="h-where-do-we-go-from-here">Where do we go from here?</h2>



To sum it all up, this discovery shows that even at a time when the universe was young, water formed and gathered in places we never would have guessed. 



Instead of seeing just cold, empty darkness out there, astronomers have spotted a real treasure -- an enormous reservoir of water swirling around a quasar more than 12 billion light-years away. 



This water vapor, along with the intense radiation from the black hole at the quasar’s center, paints a picture of an environment that is far denser, warmer, and more active than ordinary parts of the cosmos.



By studying this distant quasar, scientists can learn how the earliest galaxies came together and evolved. They can see how matter spread out, how black holes grew, and how even tiny molecules like water played a role in shaping the universe. 



Every new detail uncovered by these long-ago signals traveling through time and space helps make sense of the vast cosmic story we are all a part of.



***



Other authors on the Bradford paper, "The water vapor spectrum of APM 08279+5255," include Hien Nguyen, Jamie Bock, Jonas Zmuidzinas and Bret Naylor of JPL; Alberto Bolatto of the University of Maryland, College Park; Phillip Maloney, Jason Glenn and Julia Kamenetzky of the University of Colorado, Boulder; James Aguirre, Roxana Lupu and Kimberly Scott of the University of Pennsylvania, Philadelphia; Hideo Matsuhara of the Institute of Space and Astronautical Science in Japan; and Eric Murphy of the Carnegie Institute of Science, Pasadena. Funding for Z-Spec was provided by the <a href="https://www.nsf.gov" target="_blank" rel="noreferrer noopener">National Science Foundation</a>, <a href="https://www.nasa.gov" target="_blank" rel="noreferrer noopener">NASA</a>, the Research Corporation and the partner institutions.



The full study was published in the <a href="https://iopscience.iop.org/article/10.1088/2041-8205/738/1/L6/meta" target="_blank" rel="noreferrer noopener">Astrophysical Journal Letters</a>.



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Enough water to fill trillions of Earth's oceans found in deep space circling a quasar

Astronomers have identified a remarkable water reservoir hidden in a...

When we push ourselves on the soccer field or at the gym, a pulled muscle or two often feels like a minor inconvenience. With some rest, our muscles heal, thanks to the incredible process of regeneration. But what if our hearts - the powerhouse of our bodies - had the same ability to repair and regenerate?



A remarkable study by a collaborative research team has revealed that some patients with artificial hearts can regenerate heart muscle. 



This discovery could pave the way for revolutionary treatments for heart failure, a condition that affects nearly 7 million U.S. adults and contributes to 14% of annual deaths, according to the Centers for Disease Control and Prevention.



<h2 class="wp-block-heading" id="h-heart-failure-current-challenges">Heart failure: Current challenges</h2>



Heart failure remains an incurable condition. While medications can slow its progression, the only options for advanced cases are heart transplants or mechanical support through left ventricular assist devices (LVADs). 



These devices act as artificial hearts, helping the heart pump blood but offering no cure.



Dr. Hesham Sadek is the director of the Sarver Heart Center and chief of the Division of Cardiology at the University of Arizona <a href="https://medicine.arizona.edu" target="_blank" rel="noreferrer noopener">College of Medicine</a>.



“Skeletal muscle has a significant <a href="https://www.earth.com/news/secrets-of-zebrafish-heart-regeneration-could-transform-human-cardiac-care/" target="_blank" rel="noreferrer noopener">ability to regenerate</a> after injury. If you’re playing soccer and you tear a muscle, you need to rest it, and it heals,” said Dr. Sadek. "When a heart muscle is injured, it doesn’t grow back. We have nothing to reverse heart muscle loss.”



Dr. Sadek co-led the study alongside international experts, investigating whether heart muscles possess any regenerative potential. 



The project was funded by the <a href="https://www.fondationleducq.org" target="_blank" rel="noreferrer noopener">Leducq Foundation</a> Transatlantic Networks of Excellence Program, a collaborative initiative uniting American and European researchers.



<h2 class="wp-block-heading" id="h-regeneration-potential-of-heart">Regeneration potential of heart</h2>



The research began with tissue samples from artificial heart patients. These samples were provided by Dr. Stavros Drakos and colleagues at the University of Utah Health and <a href="https://medicine.utah.edu" target="_blank" rel="noreferrer noopener">School of Medicine</a>.



Teams from the <a href="https://ki.se/en" target="_blank" rel="noreferrer noopener">Karolinska Institute</a> in Stockholm, led by Dr. Jonas Frisén and Dr. Olaf Bergmann, used innovative carbon-dating methods to determine if these tissues contained newly generated cells.



The findings were remarkable: patients with artificial hearts regenerated muscle cells at over six times the rate observed in healthy hearts.



“This is the strongest evidence we have, so far, that human heart muscle cells can actually regenerate, which really is exciting, because it solidifies the notion that there is an intrinsic capacity of the human heart to regenerate,” noted Dr. Sadek.



“It also strongly supports the hypothesis that the inability of the heart muscle to ‘rest’ is a major driver of the heart’s lost ability to <a href="https://www.earth.com/news/python-gut-regeneration-offers-clues-for-treating-human-diseases/" target="_blank" rel="noreferrer noopener">regenerate</a> shortly after birth.”



<h2 class="wp-block-heading" id="h-role-of-rest-in-regeneration">Role of “rest” in regeneration</h2>



Heart muscle cells actively divide in utero but stop shortly after birth, focusing solely on pumping blood without pause. 



In 2011, Dr. Sadek published a study in&nbsp;<a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC3099478/" target="_blank" rel="noreferrer noopener">Science</a>&nbsp;that highlighted this shift. Later, in <a href="https://www.jacc.org/doi/abs/10.1016/j.jacc.2014.12.027" target="_blank" rel="noreferrer noopener">2014</a>, he presented evidence suggesting that patients with artificial hearts might experience some level of heart muscle regeneration. 



These findings raised a critical question: does the mechanical support provided by LVADs mimic the “bedrest” needed for muscle recovery?



“The pump pushes blood into the aorta, bypassing the heart,” said Dr. Sadek. “The heart is essentially resting.”



The current study provided direct evidence that resting the heart through artificial support could enable muscle regeneration, marking the first time such irrefutable evidence has been shown in humans.



<h2 class="wp-block-heading" id="h-variability-in-heart-regeneration">Variability in heart regeneration</h2>



Interestingly, only about 25% of artificial heart patients experience significant muscle regeneration. Dr. Sadek aims to uncover why some patients respond while others do not.



“It’s not clear why some patients respond and some don’t, but it’s very clear that the ones who respond have the ability to <a href="https://www.earth.com/news/secrets-of-killifish-regeneration-may-help-us-heal-humans/" target="_blank" rel="noreferrer noopener">regenerate</a> heart muscle,” he noted. 



“The exciting part now is to determine how we can make everyone a responder, because if you can, you can essentially cure heart failure.”



<h2 class="wp-block-heading" id="h-implications-for-the-future">Implications for the future</h2>



The potential to enhance heart muscle <a href="https://www.earth.com/news/axolotls-regeneration-powers-critically-endangered/" target="_blank" rel="noreferrer noopener">regeneration</a> through targeted molecular pathways could transform heart failure treatment. 



“The beauty of this is that a mechanical heart is not a therapy we hope to deliver to our patients in the future – these devices are tried and true, and we’ve been using them for years,” said Dr. Sadek.



This study builds on years of research and collaboration, offering renewed hope for millions of heart failure patients worldwide. With further investigation, the dream of curing heart failure could become a reality.



The study is published in the journal <a href="https://www.ahajournals.org/doi/10.1161/CIRCULATIONAHA.123.067156" target="_blank" rel="noreferrer noopener">Circulation</a>.



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Heart muscles may soon be able to regenerate like other muscles

When we push ourselves on the soccer field or at...

A new sensor can detect tiny traces of <a href="https://www.earth.com/news/antimicrobial-resistance-projected-to-kill-10-million-people-each-year/">harmful antibiotics</a> in food, such as milk and honey. This tool uses advanced technology to make food safety checks faster and more accurate. It could help make sure our food is safer to eat.



<h2 class="wp-block-heading" id="h-finding-antibiotics-in-food">Finding antibiotics in food</h2>



There is growing concern about antibiotics that show up in everyday foods. Sometimes it’s in milk or honey, and sometimes in other products.



Scientists have now created a new sensor that can detect very small amounts of two antibiotics that are banned by the <a href="https://www.earth.com/news/controversial-soda-additive-has-been-banned-by-the-fda/">FDA</a>: chloramphenicol (CP) and furazolidone (FZ). Researchers behind this effort aim to address these food safety issues effectively.



<h2 class="wp-block-heading" id="h-how-the-sensor-works">How the sensor works</h2>



The key to the sensor's operation is a special compound called Fmoc-Pro-Phe-OMe. This compound is added to a carbon paste electrode, creating what’s called an FPPO/MCPE sensor.



Scientists used advanced tests, like <a href="https://chem.libretexts.org/Bookshelves/Organic_Chemistry/Map%3A_Organic_Chemistry_(Wade)_Complete_and_Semesters_I_and_II/Map%3A_Organic_Chemistry_I_(Wade)/11%3A_Infrared_Spectroscopy_and_Mass_Spectrometry" target="_blank" rel="noreferrer noopener">mass spectroscopy and infrared spectroscopy</a>, to make sure the compound was correct. When this compound is used, the sensor can detect CP and FZ more easily and reliably.



<h2 class="wp-block-heading" id="h-why-it-s-better">Why it’s better</h2>



Older methods of detecting antibiotics in food are often slow or not sensitive enough. <a href="https://www.tandfonline.com/doi/full/10.1080/03601234.2024.2437925" target="_blank" rel="noreferrer noopener">The FPPO/MCPE sensor</a> is much more accurate. 



It can detect chloramphenicol and furazolidone at extremely low levels, making it a powerful tool for ensuring food safety.



<h2 class="wp-block-heading" id="h-the-science-behind-the-sensor">The science behind the sensor</h2>



Oxidation helps the sensor detect antibiotics because it generates measurable electrical signals. 



Here’s how it works: when antibiotics like chloramphenicol and furazolidone come into contact with the sensor's surface, they undergo a chemical reaction called oxidation, where the compounds lose electrons.



The sensor's electrode captures these released electrons, creating an electrical current. The strength of this current corresponds to the concentration of the antibiotics present in the sample, with higher concentrations producing stronger signals.



The modified surface of the sensor, enhanced by the Fmoc-Pro-Phe-OMe compound, improves the oxidation process by making it more efficient and selective. This modification allows the sensor to differentiate CP and FZ from other substances, which reduces the chance of false readings.



By monitoring these electrical signals, the sensor can accurately detect even tiny amounts of <a href="https://www.earth.com/news/nanoplastics-can-alter-the-course-of-antibiotics-within-our-body/">antibiotics</a>, making it a reliable tool for food safety testing.



<h2 class="wp-block-heading" id="h-testing-real-food-samples">Testing real food samples</h2>



To see how well the sensor works, scientists tested it on milk and honey, two foods where antibiotic residues are sometimes found. 



The World Health Organization states that antibiotic residues in food can cause allergic reactions and may lead to bacteria becoming <a href="https://www.who.int/news-room/fact-sheets/detail/antimicrobial-resistance" target="_blank" rel="noreferrer noopener">resistant to antibiotics</a>. This is why it’s crucial to identify these residues before food products reach consumers.



The sensor proved effective, finding even very small amounts of these antibiotics. This makes it a valuable tool for food safety inspectors, producers, and laboratories.



<h2 class="wp-block-heading" id="h-why-it-matters">Why it matters</h2>



Chloramphenicol is banned in many places because it can cause serious health problems, like <a href="https://www.fda.gov/animal-veterinary/regulated-products/chloramphenicol-cvm-updates" target="_blank" rel="noreferrer noopener">aplastic anemia</a>, and other <a href="https://tropmedhealth.biomedcentral.com/articles/10.1186/s41182-023-00496-x" target="_blank" rel="noreferrer noopener">serious illnesses</a> such as acute leukemia, contact dermatitis, and anaphylaxis.



Furazolidone is also linked to <a href="https://www.efsa.europa.eu/en/topics/topic/veterinary-drug-residues" target="_blank" rel="noreferrer noopener">health risks</a> and isn’t allowed in food. The antibiotic was ordered to be removed by the FDA and is not permitted for use, <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC2670425/" target="_blank" rel="noreferrer noopener">even in animals</a> .



Even the smallest traces of these harmful antibiotics can pose risks to health. This sensor plays a vital role in keeping contaminated products out of the food supply, and ensuring that foods are safe to consume.



<h2 class="wp-block-heading" id="h-addressing-antibiotic-misuse">Addressing antibiotic misuse</h2>



Antibiotics have been used extensively in agriculture to prevent diseases and promote growth in animals. While this has boosted food production, it has also increased the chances of <a href="https://www.earth.com/news/nano-sensors-can-quickly-detect-pesticides-on-fruits/">antibiotic residues</a> ending up in food. This poses risks to consumers and contributes to the growing issue of antibiotic resistance. 



By ensuring that residues can be detected even at minimal levels, tools like this sensor encourage producers to adopt safer practices. They also reinforce regulations aimed at reducing the misuse of antibiotics in food production.



<h2 class="wp-block-heading" id="h-a-step-toward-safer-food">A step toward safer food</h2>



This sensor could make food testing faster, cheaper, and more reliable. It would make it harder for <a href="https://www.earth.com/news/contamination-crisis-microplastics-found-in-88-of-protein-sources/">contaminated food</a> to slip through inspections and encourage farmers and producers to follow the rules when using antibiotics. 



In the end, this sensor helps make sure the food on our plates is as safe as it should be.



<h2 class="wp-block-heading" id="h-what-this-means-for-everyone">What this means for everyone</h2>



The goal is to protect people by keeping harmful substances out of the food supply. Whether it’s a spoonful of honey or a glass of milk, no one wants hidden antibiotics in their food.



Tools like this sensor make it easier to spot problems and fix them before the food reaches consumers. By improving food safety measures, we can move closer to a healthier and more secure food system for everyone.



The research was published in the <a href="https://www.tandfonline.com/doi/full/10.1080/03601234.2024.2437925">Journal of Environmental Science and Health</a>, Part B.



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Innovative sensor detects hidden antibiotic residues in milk and honey

A new sensor can detect tiny traces of harmful antibiotics...

The Winter Solstice, often referred to as “the shortest day of the year,” is an astronomical event that marks the beginning of winter in the Northern Hemisphere.



In this region of the world, the solstice also marks the turning point when days gradually grow longer.



While the solstice represents the start of <a href="https://www.earth.com/news/why-winters-are-getting-colder-while-world-is-getting-warmer/" target="_blank" rel="noreferrer noopener">winter</a>, the coldest temperatures often occur weeks later due to the “seasonal lag,” as the Earth continues losing heat.



Beyond its scientific significance, the winter solstice has profound cultural, spiritual, and historical importance across the globe.



<h2 class="wp-block-heading" id="h-what-is-the-winter-solstice">What is the Winter Solstice?</h2>



The Winter Solstice occurs when one of Earth’s poles is tilted farthest away from the Sun, resulting in the least amount of <a href="https://www.earth.com/news/do-we-actually-benefit-from-daylight-saving-time/" target="_blank" rel="noreferrer noopener">daylight</a>.



This happens because Earth's axis is tilted at approximately 23.5 degrees relative to its orbit around the Sun.&nbsp;



“Earth’s axis may be imagined as an imaginary pole going right through the center of our planet from ‘top’ to ‘bottom.’ Earth spins around this pole, making one complete turn each day. That is why we have day and night,” explained <a href="https://blogs.nasa.gov/Watch_the_Skies/tag/solstice/" target="_blank" rel="noreferrer noopener">NASA</a>.



In the Northern Hemisphere, the Winter Solstice typically occurs between December 20 and 23, with December 21 being the most common date.



On this day, the Sun appears to travel its shortest path across the sky. For those at the Arctic Circle, the Sun may not rise at all, creating 24 hours of darkness. 



Conversely, the Antarctic Circle experiences 24 hours of daylight.



<h2 class="wp-block-heading" id="h-winter-solstice-and-daylight-savings-time-dst">Winter solstice and Daylight Savings Time (DST)</h2>



With all of the talk recently about permanently ending <a href="https://www.earth.com/news/do-we-actually-benefit-from-daylight-saving-time/" target="_blank" rel="noreferrer noopener">Daylight Saving Time (DST)</a>, let's spend a minute discussing how DST can change how we experience the Winter Solstice.



When clocks shift back in the fall to end DST, our mornings get darker earlier because sunrise happens before we wake up. So, on those early winter mornings, it might feel like it’s still night when you roll out of bed. 



On the flip side, the evenings stay a bit lighter longer, giving us a little extra daylight after work or school. This shift can make the dark mornings a bit tougher, especially when the sun barely peeks over the horizon.



However, the impact of DST during the winter solstice also means that our evenings aren’t as dark as they would be if we stayed on standard time year-round. 



This extra evening light can be a nice boost, making it easier to enjoy outdoor activities or simply have more daylight while winding down your day. 



Overall, DST alters the natural daylight patterns around the winter solstice, changing how we perceive and use the limited daylight we get during those chilly winter months.



<h2 class="wp-block-heading" id="h-cultural-significance-of-the-winter-solstice">Cultural significance of the Winter Solstice </h2>



The Winter Solstice has been celebrated across cultures for thousands of years. Early humans observed the solstice as a critical marker of <a href="https://www.earth.com/news/peoples-moral-values-literally-change-with-the-weather/" target="_blank" rel="noreferrer noopener">seasonal change</a>, signifying the gradual return of longer daylight hours and the promise of spring.



<h3 class="wp-block-heading" id="h-stonehenge">Stonehenge</h3>



This ancient monument in England aligns with the solstices, suggesting its builders may have used it as a calendar to track astronomical events.



Constructed in several phases between roughly 3000 BCE and 2000 BCE, <a href="https://www.earth.com/news/stonehenges-famous-altar-stone-has-surprising-origins/" target="_blank" rel="noreferrer noopener">Stonehenge</a> remains a mystery regarding its exact purpose. It may have served as a burial ground or a ceremonial site.



<h3 class="wp-block-heading" id="h-yule-in-norse-tradition">Yule in Norse tradition</h3>



The Norse people celebrated Yule, lighting fires to symbolize the Sun's rebirth and feasting to mark the turning of the season.



Yule coincided with the darkest days of the year. The festival celebrated the return of the Sun and the lengthening of days, symbolizing hope and renewal.



Yule was dedicated to the gods, particularly Odin, who was associated with wisdom, magic, and the Wild Hunt - a ghostly procession believed to occur during this time. Offerings, feasts, and sacrifices were made to gain their favor.



<h3 class="wp-block-heading" id="h-saturnalia-in-ancient-rome-nbsp">Saturnalia in ancient Rome&nbsp;</h3>



Saturnalia was one of the most popular festivals in ancient Rome, held in honor of Saturn, the god of agriculture, wealth, and time.&nbsp;



Celebrated annually in mid-December, the festival originally lasted for a single day (December 17) but eventually expanded to a week. 



The celebration involved feasting, gift-giving, and a temporary social reversal where traditional roles were upended.



<h3 class="wp-block-heading" id="h-dongzhi-in-east-asia-nbsp">Dongzhi in East Asia&nbsp;</h3>



Dongzhi (冬至), meaning "Winter Solstice" in Chinese, is an important festival in East Asia.&nbsp;



Rooted in the philosophy of Yin and Yang, Dongzhi symbolizes the balance and transformation of natural energies as the days begin to lengthen, bringing more light and warmth.



Modern celebrations like Christmas and Hanukkah incorporate elements of these ancient traditions, emphasizing light and hope during the darkest days of the year.



<h2 class="wp-block-heading" id="h-a-universal-reminder">A universal reminder</h2>



The Winter Solstice is more than just an astronomical event; it serves as a reminder of nature’s rhythms and humanity’s enduring connection to the <a href="https://www.earth.com/news/anthropic-principle-we-live-in-a-universe-fine-tuned-to-support-life/" target="_blank" rel="noreferrer noopener">universe</a>. It symbolizes resilience, as the darkest day paves the way for the return of light.&nbsp;



Across millennia, it has inspired wonder, reflection, and celebration - a testament to the timeless bond between Earth, its inhabitants, and the heavens.



<h2 class="wp-block-heading" id="h-a-spiritual-turning-point">A spiritual turning point</h2>



The solstice encourages people to look inward, reflect on the past year, and set intentions for the year ahead, aligning with the natural pause of winter.



This occasion represents the balance and cycles of life, urging us to embrace both light and shadow in our personal journeys.



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Winter Solstice: The shortest day of the year has arrived

The Winter Solstice, often referred to as “the shortest day...

You might think of tea as a comforting, soothing ritual. But, scientists at Universitat Autònoma de Barcelona (UAB) have made a startling discovery - infusing tea through commercial tea bags might be releasing billions of nanoplastics and microplastics into your cup.



Recent research from the Mutagenesis Group in the UAB Department of Genetics and Microbiology highlights how polymer-based tea bags release microplastics and nanoplastics (MNPLs) during brewing.



For the first time, the study has shown that these particles can be absorbed by human intestinal cells, potentially entering the bloodstream and spreading throughout the body.



<h2 class="wp-block-heading" id="h-source-of-plastic-contamination-in-tea-bags">Source of plastic contamination in tea bags</h2>



Food packaging is a leading contributor to <a href="https://www.earth.com/news/microplastics-are-steadily-increasing-in-freshwater-environments/" target="_blank" rel="noreferrer noopener">micro and nanoplastic pollution</a>. Humans are primarily exposed to these particles through inhalation and ingestion. 



This new study focuses on the significant release of MNPLs from commercially available tea bags when used to prepare an infusion.



The researchers discovered alarming levels of contamination:



<ul class="wp-block-list">
<li>Polypropylene&nbsp;released around&nbsp;1.2 billion particles per milliliter, with an average size of 136.7 nanometers.</li>



<li>Cellulose&nbsp;released&nbsp;135 million particles per milliliter, averaging 244 nanometers.</li>



<li>Nylon-6&nbsp;released&nbsp;8.18 million particles per milliliter, averaging 138.4 nanometers.</li>
</ul>



These findings underline the importance of identifying and reducing plastic exposure through everyday items, like tea bags.



<h2 class="wp-block-heading" id="h-analyzing-plastic-particles-in-tea-bags">Analyzing plastic particles in tea bags</h2>



To characterize these particles, the researchers employed advanced analytical techniques, including scanning electron microscopy (SEM), transmission electron microscopy (TEM), and <a href="https://www.earth.com/news/how-nanotechnology-is-fighting-microplastic-pollution/" target="_blank" rel="noreferrer noopener">nanoparticle</a> tracking analysis (NTA).



These methods allowed the team to examine the structure, size, and behavior of the particles in detail.



"We have managed to innovatively characterize these pollutants with a set of cutting-edge techniques, which is a very important tool to advance research on their possible impacts on human health," explained <a href="https://www.uab.cat" target="_blank" rel="noreferrer noopener">UAB</a> researcher Alba Garcia.



<h2 class="wp-block-heading" id="h-human-health-at-risk">Human health at risk</h2>



For the first time, the team explored how <a href="https://www.earth.com/news/microplastics-are-infiltrating-the-human-body-even-the-brain/" target="_blank" rel="noreferrer noopener">MNPLs</a> interact with human intestinal cells. To achieve this, they stained the particles to track their movement and exposed them to various types of intestinal cells in the lab. 



The study revealed that mucus-producing intestinal cells absorbed the highest amount of these plastic particles from tea bags.



This was a significant finding because these cells play a protective role in the gut. Even more alarming was the observation that some particles managed to penetrate the cell nucleus, the part of the cell where genetic material is stored and regulated.



This discovery raises serious concerns about the long-term health effects of MNPL exposure. If these particles can reach the nucleus, they may interfere with cellular functions or genetic processes, potentially causing harmful outcomes over time.



The researchers also noted that intestinal mucus played a key role in helping the particles enter the cells. This finding suggests that individuals with frequent <a href="https://www.earth.com/news/microplastics-trigger-cloud-formation-and-alter-weather-patterns/" target="_blank" rel="noreferrer noopener">exposure to MNPLs</a> - such as those from food or drink packaging - could face cumulative risks.



Chronic exposure might lead to widespread impacts on health, emphasizing the need for further research and preventive measures.



<h2 class="wp-block-heading" id="h-calls-for-regulation-and-policy-changes">Calls for regulation and policy changes</h2>



The findings emphasize the urgent need for regulatory measures to minimize <a href="https://www.earth.com/news/microplastic-pollution-is-everywhere-even-in-newborns-and-getting-worse/" target="_blank" rel="noreferrer noopener">MNPL contamination</a> in food packaging. 



"It is critical to develop standardized test methods to assess MNPLs contamination released from plastic food contact materials and to formulate regulatory policies to effectively mitigate and minimize this <a href="https://www.earth.com/news/microplastics-found-in-the-tissue-and-skeletons-of-corals/" target="_blank" rel="noreferrer noopener">contamination</a>," noted Alba Garcia and her team.



"As the use of plastic in food packaging continues to increase, it is vital to address MNPLs contamination to ensure food safety and protect public health."



This research on contamination in tea bags highlights the pressing need to prioritize food safety in the face of rising plastic use. By understanding and addressing microplastic and nanoplastic contamination, we can work toward protecting public health and the environment.



<h2 class="wp-block-heading" id="h-making-informed-choices-about-products">Making informed choices about products</h2>



This study sheds light on a hidden source of plastic pollution that affects <a href="https://www.earth.com/news/hotspots-of-microplastic-pollution-found-in-the-north-sea/" target="_blank" rel="noreferrer noopener">everyday life</a>. As tea drinkers worldwide sip from polymer-based tea bags, they may unknowingly expose themselves to billions of plastic particles.



The implications for human health are alarming, but this research offers a critical foundation for future studies and regulations.



Making informed choices about the products we use and supporting policies aimed at reducing plastic pollution are essential steps toward ensuring a safer, healthier future.



The study is published in the journal <a href="https://www.sciencedirect.com/science/article/pii/S0045653524026377?via%3Dihub" target="_blank" rel="noreferrer noopener">Chemosphere</a>.



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Tea bags release millions of plastic particles during brewing

You might think of tea as a comforting, soothing ritual....

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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

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



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



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



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



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



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



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



Video Credit: Amanda Nguyen/University of Illinois



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



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

Designing crops that can beat the heat

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Today&#8217;s Image of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features the galaxy ESO 300-16, which is located 28.7 million light-years from Earth in the constellation Eridanus



According to ESA, the galaxy is a ghostly assemblage of stars which resembles a sparkling cloud.&nbsp;



&#8220;A rogue’s gallery of distant galaxies and foreground stars complete this astronomical portrait, which was captured by the Advanced Camera for Surveys,&#8221; said ESA.



&#8220;This observation is one of a series which aims to get to know our galactic neighbors; around three quarters of the known galaxies suspected to lie within 10 megaparsecs of Earth have been observed by Hubble in enough detail to resolve their brightest stars and establish the distances to these galaxies.&#8221;



&#8220;A team of astronomers proposed using small gaps in Hubble’s observing schedule to acquaint ourselves with the remaining quarter of the nearby galaxies.&#8221;



ESO 300-16 is a relatively small and remote dwarf galaxy. It is sometimes known as a &#8220;compact blue dwarf galaxy&#8221; because of its size and the intense blue colors indicating active star formation.&nbsp;



These galaxies are typically small, but they have high star-forming rates for their size. This kind of galaxy can provide insights into the process of star formation as well as galaxy evolution in general.



Dwarf galaxies are of particular interest to astronomers because they can help to provide understanding about the formation and evolution of galaxies in the early universe. They&#8217;re also thought to play a role in the assembly of larger galaxies over cosmic time.



By studying galaxies like ESO 300-16, astronomers can hope to better understand how galaxies grow, evolve, and interact over time.&nbsp;



Image Credit: ESA



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A ghostly assemblage of stars make up the galaxy ESO 300-16

Today's Image of the Day from <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA Earth Observatory</a> features what appears to be a ghostly face peering out of Trou au Natron, a deep volcanic pit in northern Chad.&nbsp;



Trou au Natron is a volcanic crater (or maar) located in the Sahara desert. It's part of the Tibesti Mountains, a chain of volcanic formations.&nbsp;



The crater is filled with natron, a naturally occurring mixture of sodium carbonate decahydrate (Na2CO3·10H2O) and around 17% sodium bicarbonate (also called baking soda) along with small quantities of sodium chloride (salt) and sodium sulfate.&nbsp;



This mixture gives the crater its name, as "natron" refers to this type of salt, which was historically used in a variety of ways, including mummification by the ancient Egyptians.&nbsp;



Trou au Natron is noteworthy for its stark and impressive landscape, with steep crater walls surrounding the salt flat inside. The photo was captured by an astronaut on the International Space Station on February 12, 2023.



"The edge of the 'face' is partly formed by shadows cast by the rim of a caldera - a type of volcanic crater formed after an explosive eruption or the collapse of the surface into a partially-emptied magma chamber," said NASA.



"The 'eyes' and 'nose' are cinder cones - steep conical hills built around volcanic vents. The cinder cones are thought to be relatively young in geological terms, likely forming within the past few million years and possibly as recently as the past few thousand years."



"The white area around the 'mouth' is a mineral crust made of a salt known as natron - a mixture of sodium carbonate, sodium bicarbonate, sodium chloride, and sodium sulfate. It forms as hot spring water pools on the surface and evaporates, and mineral-rich steam rises from the surface of the geothermally active area."



Image Credit: NASA Earth Observatory&nbsp;



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