<p>Today's <strong>Image of the Day</strong> from the <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">European Space Agency</a> features the Columbia Glacier, a tidewater glacier located in Prince William Sound on the south coast of Alaska. It is one of the most rapidly changing <a href="https://www.earth.com/news/melting-glaciers-pose-great-threat-to-biodiversity-in-mountain-ranges/" target="_blank" rel="noreferrer noopener">glaciers</a> in the world and has been closely studied for the insights it provides into glacial mechanics and climate change impacts. </p>



<p>"Since the early 1980s, the Columbia Glacier has retreated more than 20 km and lost about half of its total volume. This one glacier accounts for nearly half of the ice lost in the Chugach Mountains," noted ESA.</p>



<p>"The changing climate is thought to have caused its retreat. Until 1980, when its rapid and constant retreat began, the glacier’s terminus was observed at the northern edge of Heather Island, which lies near the end of Columbia Bay, the inlet into which the glacier currently flows before draining into Prince William Sound."</p>



<p>"This satellite image, acquired in September 2023, shows instead the deep mostly ice-free Columbia Bay dotted with numerous icebergs and fragmented sea-ice."</p>



<h2 class="wp-block-heading" id="h-dramatic-calving-events">Dramatic calving events</h2>



<p>The Columbia Glacier is known for its dramatic calving events, where large chunks of ice break off from the glacier's terminus and fall into the sea, becoming icebergs. This process has been particularly active as the glacier has retreated, contributing to hazards for shipping in Prince William Sound.</p>



<p>The glacier has been the focus of extensive scientific research, serving as a case study for understanding the dynamics of tidewater glaciers and their responses to <a href="https://www.earth.com/news/preparing-for-ocean-acidification-a-silent-killer-of-climate-change/" target="_blank" rel="noreferrer noopener">climate change</a>. Studies have used satellite imagery, field observations, and modeling to track its changes over time.</p>



<h2 class="wp-block-heading" id="h-climate-impact-on-the-columbia-glacier">Climate impact on the Columbia Glacier</h2>



<p>"Columbia is just one of the many glaciers suffering from the effects of climate change. Most of the glaciers around the world are losing mass. However, before the advent of satellites, measuring their retreat and studying their vulnerability to climate change was difficult considering their size, remoteness and rugged terrain they occupy," said ESA.</p>



<p>"Different satellite instruments now can gather information systematically and over large areas, providing an effective means to monitor change, keep track of all calving stages and quantify the melting rate and their contribution to sea-level rise."</p>



<h2 class="wp-block-heading">More about Columbia Glacier&nbsp;</h2>



<p>Columbia Glacier flows from the Chugach Mountains into Columbia Bay. It was once one of the largest contributors to <a href="https://www.earth.com/news/sea-level-rise-will-cost-coastal-cities-over-1-trillion-in-damages/" target="_blank" rel="noreferrer noopener">sea level rise</a> due to its significant ice loss. </p>



<p>The glacier's dynamics are influenced by its interaction with water, where the terminus meets the ocean. As the glacier flows into the sea, large chunks of ice calve off the front, leading to dramatic scenes of ice crashing into the <a href="https://www.earth.com/news/shelf-sediment-ocean-composition/" target="_blank" rel="noreferrer noopener">ocean</a>. This process has been intensifying due to warmer temperatures and changes in water circulation, which undermine the ice from below.</p>



<p>Columbia Glacier's retreat has significant implications for marine navigation and local ecosystems. The increase in icebergs calving into the bay poses hazards to ships, while the fresh meltwater impacts local water temperatures and salinity, affecting the habitat of fish and other marine life.</p>



<h2 class="wp-block-heading">Melting glaciers and ocean composition&nbsp;</h2>



<p>Glaciers, which are large masses of accumulated snow and ice, store about 69 percent of the world's fresh water. As the climate warms, these glaciers increasingly melt and release freshwater into nearby seas and the ocean at large.</p>



<h3 class="wp-block-heading">Influx of freshwater</h3>



<p>This influx of freshwater from <a href="https://www.earth.com/news/melting-glaciers-pose-great-threat-to-biodiversity-in-mountain-ranges/" target="_blank" rel="noreferrer noopener">melting glaciers</a> alters the salinity (salt concentration) of the ocean water. Since freshwater is less dense than saltwater, its addition can lead to stratification in which lighter, less salty water layers on top of denser, saltier water. </p>



<p>This stratification can disrupt ocean currents, which are driven in part by differences in water density and temperature. These currents are crucial for regulating global climate by distributing heat and nutrients around the planet.</p>



<h3 class="wp-block-heading">Changes in salinity&nbsp;</h3>



<p>Furthermore, changes in <a href="https://www.earth.com/news/human-induced-changes-in-ocean-salinity-threaten-biodiversity-and-marine-ecosystems/" target="_blank" rel="noreferrer noopener">salinity</a> can affect marine life, which often has narrow salinity tolerance ranges. For example, shifts in salinity can impact breeding cycles, migration patterns, and the availability of nutrients. </p>



<h3 class="wp-block-heading">Global carbon cycle</h3>



<p>As the ocean's composition changes, its capacity to absorb carbon dioxide from the atmosphere could also be altered, affecting the global carbon cycle and, by extension, climate change feedback mechanisms.</p>



<p>The melting of glaciers contributes to more pronounced changes in ocean conditions, impacting everything from global climate systems to local ecosystems in marine environments.</p>



<p>Image Credit: ESA&nbsp;</p>



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Columbia Glacier on the south coast of Alaska

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

<p>Today's Image of the Day from <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA Earth Observatory</a> features a 9.5-mile section of Pangong Lake on the western end of the <a href="https://www.earth.com/news/temperatures-are-rising-unexpectedly-fast-on-the-tibetan-plateau/" target="_blank" rel="noreferrer noopener">Tibetan Plateau</a>. The image was captured on January 25, 2024 by a crew member aboard the International Space Station. </p>



<p>“In this winter scene, a sheet of cracked ice tops part of the lake,” noted NASA. “On the left side, open water appears blue. Shallow water offshore of a delta, formed by a small, winding river, appears green.</p>



<p>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.”</p>



<p>“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;</p>



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



<p>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.</p>



<p>“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.</p>



<p>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.</p>



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



<p>Pangong Lake is a stunning high-altitude lake situated in the Himalayas, 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.</p>



<p>This saline water lake is approximately 134 kilometers long and 5 kilometers wide at its broadest point, despite its considerable size, it's relatively shallow.&nbsp;</p>



<p>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.</p>



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



<p>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.</p>



<p>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.</p>



<p>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.</p>



<p>These lakes 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.</p>



<p>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.</p>



<p>Image Credit: NASA Earth Observatory&nbsp;</p>



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Pangong Lake in the Himalayas

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

<p>Today's <strong>Image of the Day</strong> from the <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">European Space Agency</a> features Messier 82, a starburst galaxy located in the constellation Ursa Major. This <a href="https://www.earth.com/news/ceers-2112-ancient-galaxy-looks-strikingly-similar-to-ours/" target="_blank" rel="noreferrer noopener">galaxy</a> is actively forming new stars at a rate ten times that of the Milky Way.</p>



<p>In a groundbreaking study using the <a href="https://webb.nasa.gov/" target="_blank" rel="noreferrer noopener">James Webb Space Telescope</a> (JWST), an international team of astronomers has taken an unprecedented look at Messier 82 (M82), revealing intricate details about its frenzied star formation. </p>



<h2 class="wp-block-heading" id="h-the-power-of-nircam-and-infrared-observations">The power of NIRCam and infrared observations</h2>



<p>The study, led by Alberto Bolatto, utilized Webb’s Near-Infrared Camera (NIRCam) to penetrate the thick dust and gas veiling the galaxy's core, a region critical to understanding <a href="https://www.earth.com/news/baby-stars-release-sneezes-of-gas-and-dust-as-they-develop/" target="_blank" rel="noreferrer noopener">star formation</a>. </p>



<p>"M82 has garnered a variety of observations over the years because it can be considered as the prototypical starburst galaxy," noted Bolatto. “With Webb’s size and resolution, we can look at this star-forming galaxy and see all of this beautiful new detail.”</p>



<p>Webb's NIRCam has proven crucial for observing areas like M82’s center, where layers of dust typically obscure the view in other wavelengths. The camera's ability to capture infrared light allows it to reveal the galaxy's core and its dynamic processes.&nbsp;</p>



<h2 class="wp-block-heading" id="h-messier-82-image-shows-the-power-of-webb-nbsp">Messier 82 image shows the power of Webb&nbsp;</h2>



<p>“This image shows the power of Webb. Every single white dot in this image is either a star or a star cluster. We can start to distinguish all of these tiny point sources, which enables us to acquire an accurate count of all the star clusters in this galaxy,” noted study second author Rebecca Levy from the University of Arizona.</p>



<p>One of the NIRCam's innovative features is its mode that prevents bright sources from overwhelming the detector, which was particularly useful in studying the intensely active center of Messier 82.&nbsp;</p>



<p>In the image, the dark brown tendrils of dust weave through the galaxy's glowing white core, interspersed with small green specks that represent concentrated areas of iron from <a href="https://www.earth.com/news/supernova-explosions-could-damage-distant-planets/" target="_blank" rel="noreferrer noopener">supernova</a> remnants. Red patches highlight regions where molecular hydrogen is illuminated by the radiation from nearby young stars.</p>



<h2 class="wp-block-heading" id="h-insights-into-galactic-winds">Insights into galactic winds</h2>



<p>The study also focused on understanding how the <a href="https://www.earth.com/news/spin-of-a-new-black-hole-is-unlocking-galactic-mysteries/" target="_blank" rel="noreferrer noopener">galactic wind</a>, driven by the rapid rate of star formation and subsequent supernovae, influences M82’s environment. The NIRCam images showed clumpy tendrils of gas, appearing in red, which extend above and below the galaxy's plane, marking the path of this wind rushing out from the starburst's core.</p>



<p>A key revelation came from the NIRCam’s tracing of polycyclic aromatic hydrocarbons (PAHs), sooty chemical molecules that map out the structure of the galactic wind. To the surprise of researchers, the PAH emissions closely resembled the patterns of the hot, ionized gas, suggesting a more complex interaction within the wind than previously understood.&nbsp;</p>



<p>"It was unexpected to see the PAH emission resemble ionised gas," said Bolatto. "PAHs are not supposed to live very long when exposed to such a strong radiation field, so perhaps they are being replenished all the time. It challenges our theories and shows us that further investigation is required."</p>



<h3 class="wp-block-heading" id="h-future-observations-of-messier-82">Future observations of Messier 82</h3>



<p>The findings from Webb are just the beginning. The team plans to further analyze Messier 82 with additional data, including spectroscopic observations, to determine the ages of the <a href="https://www.earth.com/news/galaxy-collisions-hubble-spots-a-string-of-pearls-star-cluster/" target="_blank" rel="noreferrer noopener">star clusters</a> and the duration of each star formation phase within the starburst environment. </p>



<p>These observations will also assist in a broader understanding of similar processes in early galaxies, which were common in the young universe.</p>



<h2 class="wp-block-heading" id="h-broader-implications-of-the-study">Broader implications of the study</h2>



<p>Study co-author Torsten Böker of the European Space Agency (ESA) emphasized the broader implications of these findings.&nbsp;</p>



<p>“With these amazing Webb images, and our upcoming spectra, we can study how exactly the strong winds and shock fronts from young stars and supernovae can remove the very gas and dust from which new stars are forming,” explained Böker.&nbsp;</p>



<p>“A detailed understanding of this ‘feedback’ cycle is important for theories of how the early universe evolved, because compact starbursts such as the one in M82 were very common at high redshift.”</p>



<p>The study not only illuminates the specific mechanics of star formation in M82 but also enhances our general understanding of galactic evolution and the lifecycle of galaxies.&nbsp;</p>



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



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Messier 82: Unlocking the mysteries of star formation

<p>Today's <strong>Image of the Day</strong> from the <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">European Space Agency</a> features the spiral galaxy IC 5332, which is located over 29 million light-years away from Earth and spans approximately 66,000 light-years in diameter. This makes it notably smaller than our <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</a>, which is about a third larger.&nbsp;</p>



<h2 class="wp-block-heading" id="h-unprecedented-look-at-ic-5332">Unprecedented look at IC 5332</h2>



<p>In a stunning photo release by NASA and ESA in 2022, the spiral galaxy IC 5332 was presented in an unprecedented level of detail in images captured by the <a href="https://www.earth.com/news/james-webb-captures-incredible-new-image-of-uranus/" target="_blank" rel="noreferrer noopener">James Webb Space Telescope</a>.</p>



<p>This feat was made possible through the use of the Mid-InfraRed Instrument (MIRI), which captures images in the mid-infrared spectrum.</p>



<h2 class="wp-block-heading" id="h-unique-perspective-from-earth">Unique perspective from Earth</h2>



<p>One of the most striking features of IC 5332, as revealed by these observations, is its almost perfect face-on orientation relative to Earth. </p>



<p>This unique perspective allows astronomers to clearly observe and admire the symmetrical arrangement of its spiral arms.</p>



<h2 class="wp-block-heading" id="h-webb-unveils-ic-5332-in-new-light">Webb unveils IC 5332 in new light</h2>



<p>The clarity of these images represents a significant advancement over previous observations made by the Hubble Space Telescope, which imaged IC 5332 in ultraviolet and visible light.&nbsp;</p>



<p>While Hubble’s images revealed the galaxy’s symmetrical spiral arms, James Webb’s MIRI has unveiled these structures as a complex web of gas that emits infrared light at various temperatures.</p>



<h2 class="wp-block-heading" id="h-the-miri-instrument-on-james-webb-nbsp">The MIRI instrument on James Webb&nbsp;</h2>



<p>Capturing this range of infrared light is no simple task. It requires highly specialized instruments that must be maintained at extremely cold temperatures.&nbsp;</p>



<p>The MIRI instrument on the James Webb Space Telescope is specifically designed for this purpose and performs exceptionally well. Its capabilities allow astronomers to see aspects of <a href="https://www.earth.com/news/james-webb-captures-galaxies-that-are-too-old-to-exist/" target="_blank" rel="noreferrer noopener">galaxies</a> that are otherwise hidden in other wavelengths.</p>



<p>The detailed images provided by MIRI offer more than just a visual spectacle; they provide valuable data about the composition and temperature of the gases that make up the spiral arms of IC 5332. This can help scientists understand the processes of star formation within the galaxy and how these processes compare to those in our own <a href="https://www.earth.com/news/stars-at-the-edge-of-our-milky-way-galaxy-travel-more-slowly/" target="_blank" rel="noreferrer noopener">Milky Way</a>.</p>



<h2 class="wp-block-heading" id="h-webb-finds-hidden-features-of-the-universe-nbsp">Webb finds hidden features of the universe&nbsp;</h2>



<p>Moreover, the images of IC 5332 serve as a critical test of the James Webb Space Telescope’s capabilities in observing the universe in infrared light. As astronomers continue to deploy Webb’s full suite of instruments to explore the cosmos, it is expected that many more hidden features of the universe will be revealed.</p>



<p>The information provided by the <a href="https://www.earth.com/news/webb-telescope-discovers-second-most-distant-galaxy-in-pandoras-cluster/" target="_blank" rel="noreferrer noopener">James Webb Space Telescope</a> not only expands our understanding of the cosmos but also enhances our appreciation for the complex and beautiful structures that exist in our universe.&nbsp;</p>



<p>We can anticipate many more insights from Webb that will deepen our understanding of the fundamental processes governing galaxies and the broader universe.</p>



<h2 class="wp-block-heading" id="h-more-about-spiral-galaxies-like-ic-5332">More about spiral galaxies like IC 5332</h2>



<p>Spiral galaxies are some of the most visually striking objects in the universe, characterized by their rotating arms that extend from a central nucleus, giving them a distinct spiral appearance.&nbsp;</p>



<p>These galaxies are primarily made up of a flat, rotating disk containing stars, gas, and dust, and a central concentration of stars known as the bulge. These are often surrounded by a much fainter halo of stars, many of which reside in globular clusters.</p>



<p>Spiral galaxies differ from other galaxy types, such as elliptical and irregular galaxies, in their structure and content. The spiral arms are sites of ongoing star formation and are brighter than the rest of the disk because of the young, hot stars that are typically found there. The arms appear distinct because of their density waves, which compress the gas and dust, leading to star formation.</p>



<p>The rotation of the spiral arms also contributes to the galaxy's flat shape due to the centrifugal forces acting on the disk. The central bulge can vary in size and often contains older, red stars.&nbsp;</p>



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



<p>Some spiral galaxies have a bar-shaped structure that extends from the central bulge, making them barred spirals. This bar affects the motion of stars and gas within the galaxy and can influence star formation activity.</p>



<p>The Milky Way, where our solar system resides, is an example of a barred spiral galaxy. Spiral galaxies are an important focus of study because they contain a significant amount of visible matter and play a crucial role in understanding the formation and evolution of galaxies.&nbsp;</p>



<p>Their distinct features also make them particularly useful for studying the laws of physics under extreme conditions, such as high densities and velocities.</p>



<p>Image Credit: ESA/Webb, NASA &amp; CSA, J. Lee and the PHANGS-JWST and PHANGS-HST Teams</p>



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Webb unveiled spiral galaxy IC 5332 in new light

<p>Today's <strong>Image of the Day</strong> from <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA Earth Observatory</a> features the Corbassière glacier, a high-altitude glacier in Switzerland. The glacier originates on the northern slope of the Grand Combin, which is one of the highest peaks in the Pennine Alps.</p>



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



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



<p>"Glaciers are natural archives of past climate. In their frozen layers lies evidence of Earth’s changing temperature and atmospheric composition. But as the climate warms, some of the longest records of our changing planet are melting away," said NASA.</p>



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



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



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



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



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



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



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



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



<p>The experts determined that melting on the glacier's surface likely penetrated the glacier layers below and carried away the aerosol ions. "This melting rendered the core unusable in the team’s research, and other attempts to core the glacier had the same result. The valuable information stored in the ice was destroyed," explained NASA.</p>



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



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



<h2 class="wp-block-heading">More about the Corbassière Glacier</h2>



<p>The Corbassière Glacier is a captivating natural feature located in the Swiss Alps, part of the canton of Valais. This glacier stretches over approximately 9 kilometers, making it one of the significant glaciers in the region. It originates from the Grand Combin, an imposing mountain massif that reaches heights of over 4,300 meters, contributing greatly to the glacier's nourishment through snow and ice accumulation.</p>



<p>A distinct feature of the Corbassière Glacier is its accessibility and the dramatic scenery it offers, which attracts many hikers and nature enthusiasts. One of the most notable attractions near the <a href="https://www.earth.com/news/doomsday-glacier-seems-to-have-lost-its-ability-to-recover/" target="_blank" rel="noreferrer noopener">glacier</a> is the Corbassière footbridge, a 210-meter long suspension bridge that provides stunning views of the glacier and the surrounding peaks. </p>



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



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



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



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



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



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



<p>Image Credit: NASA Earth Observatory</p>



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Corbassière glacier: Earth's climate archives are melting away

<p>Today's <strong>Image of the Day</strong> from <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA Earth Observatory</a> features dust streaming from Lago Colhué Huapi, a shallow endorheic lake located in the Chubut Province in southern Argentina.</p>



<p>"Strong northwesterly winds often race down the eastern side of the Andes Mountains and whip across the central Patagonian Desert. In the process, they sometimes lift dust from Argentina’s drying Lago Colhué Huapi, fueling intense dust storms," said NASA.</p>



<p>"Lago Colhué Huapi is a particularly rich source of dust because the shallow lake regularly grows and shrinks with variations in the flow of the Senguer River and the pace of evaporation. When lake water levels are low, as they were when MODIS captured this image, fine-grained, lightweight particles are easily transported by the wind."</p>



<h2 class="wp-block-heading" id="h-dust-activity-from-lago-colhue-huapi">Dust activity from Lago Colhué Huapi</h2>



<p><a href="https://www.earth.com/news/dust-storms-in-the-gulf-of-alaska-help-shape-the-global-climate/" target="_blank" rel="noreferrer noopener">Dust storms</a> in this region are most common during the summer months from December to March. There are 15 to 30 dust storms in a typical year. </p>



<p>"Dust storms are frequent and persistent enough in this area that they have exposed an open-air archaeological site along the lake’s edge," said NASA.</p>



<p>"The Puesto Roberts 1 site, located in an old floodplain on the southeast side of Lago Colhué Huapi, was first identified in 2019 when archaeologists noticed that winds had exposed a five-centimeter layer of sandy loam soil littered with stone tools and the bones of a wild species of llama called guanaco."</p>



<p>"Archaeologists identified 427 artifacts at the site - including stone cutting blades, milling tools, scrapers, and egg-shaped bola stones used for hunting - spread across 15 square meters, according to a 2022 study led by Heidi Hammond, an archaeologist at the National University of the Patagonia San Juan Bosco."</p>



<h2 class="wp-block-heading" id="h-more-about-lago-colhue-huapi">More about Lago Colhué Huapi</h2>



<p>This lake is an interesting geographical feature primarily because it acts as a seasonal sink for the Senguerr River, which in turn gathers waters from various smaller streams in the region.&nbsp;</p>



<h3 class="wp-block-heading" id="h-size">Size</h3>



<p>Due to its shallow nature, the size of Lago Colhué Huapi can vary significantly with the seasons and the amount of water it receives from its sources. During times of drought or reduced rainfall, the <a href="https://www.earth.com/news/climate-change-is-pushing-lakes-to-their-boiling-point/" target="_blank" rel="noreferrer noopener">lake</a> can shrink considerably, affecting the local ecosystem and the wildlife that depends on it.</p>



<h3 class="wp-block-heading" id="h-climate">Climate</h3>



<p>The lake's surroundings are characterized by a semi-arid climate, which influences the type of vegetation and animal life that can thrive in the area. Despite the harsh conditions, the region around Lago Colhué Huapi supports a variety of bird species, making it a site of interest for birdwatchers and naturalists.</p>



<h3 class="wp-block-heading" id="h-environmental-challenges">Environmental challenges </h3>



<p>In recent years, Lago Colhué Huapi has faced environmental challenges, including the impact of <a href="https://www.earth.com/news/alarming-study-most-of-the-worlds-largest-lakes-are-quickly-losing-water/" target="_blank" rel="noreferrer noopener">climate change</a>, which has led to lower water levels and increased salinity. These changes pose threats to the lake's ecological balance and the species that inhabit its waters and shores. The situation at Lago Colhué Huapi serves as a reminder of the broader environmental issues facing water bodies in arid and semi-arid regions around the world.</p>



<p>The image was captured on March 29, 2024 by the MODIS (Moderate Resolution Imaging Spectroradiometer) on NASA’s Aqua satellite.</p>



<p>Image Credit: NASA Earth Observatory</p>



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<p>-----</p>

Dust streams from Lago Colhué Huapi in Argentina 

<p>A team of researchers led by the <a href="https://www.colorado.edu/" target="_blank" rel="noreferrer noopener">University of Colorado Boulder</a> (CU Boulder) has found why <a href="https://www.earth.com/news/how-the-hellish-planet-venus-can-help-us-find-alien-life/">Venus</a>, Earth's nearest planetary neighbor, is so devoid of moisture. The experts delved deep into what they term “the water story on Venus,” revealing that Venus loses about twice as much water into space each day than previously thought.</p>



<p>The phenomenon occurs through a process known as “dissociative recombination,” in which hydrogen atoms from Venus’s atmosphere are lost to space.&nbsp;</p>



<h2 class="wp-block-heading" id="h-water-retention-and-loss-across-planets">Water retention and loss across planets</h2>



<p>By using computer simulations, the experts hope to shed light on water retention and loss across many planets in the galaxy, enhancing our understanding of planetary climates and their capability to support life.</p>



<p>“<a href="https://www.earth.com/news/hubble-finds-a-water-rich-planet-with-a-steamy-atmosphere-named-gj-9827d/" target="_blank" rel="noreferrer noopener">Water</a> is really important for life,” said co-lead author Eryn Cangi, a research scientist at the <a href="https://lasp.colorado.edu/" target="_blank" rel="noreferrer noopener">Laboratory for Atmospheric and Space Physics</a> (LASP) at CU Boulder. “We need to understand the conditions that support liquid water in the universe, and that may have produced the very dry state of Venus today.” </p>



<h2 class="wp-block-heading" id="h-earth-versus-venus">Earth versus Venus</h2>



<p>Contrasting Venus with Earth highlights the stark differences in water abundance. “Venus has 100,000 times less water than the Earth, even though it’s basically the same size and mass,” explained co-lead author Michael Chaffin, a research scientist at LASP.&nbsp;</p>



<p>If Earth's water were evenly distributed across its surface, it would form a layer about three kilometers deep. In contrast, Venus would have a shallow pool of just three centimeters deep.</p>



<h2 class="wp-block-heading" id="h-rapid-water-loss-from-venus-nbsp">Rapid water loss from Venus&nbsp;</h2>



<p>The team utilized advanced computer models to simulate the complex chemical processes occurring in Venus's dense and turbulent <a href="https://www.earth.com/news/earths-atmosphere-is-expanding-due-to-climate-change/" target="_blank" rel="noreferrer noopener">atmosphere</a>. </p>



<p>The research pointed to a molecule known as HCO+, an ion consisting of hydrogen, carbon, and oxygen, as a key player in the rapid loss of water from Venus. This molecule forms high in the atmosphere and facilitates the escape of hydrogen atoms into space.</p>



<h2 class="wp-block-heading" id="h-planetary-changes-and-their-outcomes-nbsp">Planetary changes and their outcomes&nbsp;</h2>



<p>For Cangi, who completed her doctorate in astrophysical and planetary sciences at CU Boulder in 2023, the study not only fills a significant gap in our understanding of Venus's climate history but also illustrates how minor planetary changes can lead to dramatic environmental outcomes.&nbsp;</p>



<p>“We’re trying to figure out what little changes occurred on each planet to drive them into these vastly different states,” she said.</p>



<h2 class="wp-block-heading" id="h-ancient-water-loss-on-venus">Ancient water loss on Venus</h2>



<p>Reflecting on Venus’s past, the researchers suggest that it once harbored as much water as Earth. However, a catastrophic escalation in <a href="https://www.earth.com/news/runaway-greenhouse-effect-could-turn-earth-into-an-uninhabitable-hell/" target="_blank" rel="noreferrer noopener">greenhouse gasses</a> led to runaway temperatures, vaporizing all its water, which then was lost to space. </p>



<p>This ancient water loss does not fully account for Venus's current dryness, which led the scientists to explore ongoing atmospheric processes.</p>



<p>“As an analogy, say I dumped out the water in my water bottle. There would still be a few droplets left,” Chaffin said. On Venus, even those residual droplets have disappeared, a mystery that the study attributes to the elusive HCO+ molecule.</p>



<p>Chaffin and Cangi pointed out that while many missions have explored Mars, Venus has seen fewer scientific visitors, which has limited our understanding of its atmospheric composition.&nbsp;</p>



<p>“One of the surprising conclusions of this work is that HCO+ should actually be among the most abundant ions in the Venus atmosphere,” Chaffin remarked.</p>



<h2 class="wp-block-heading" id="h-future-missions-to-venus">Future missions to Venus</h2>



<p>Looking ahead, the researchers are enthusiastic about upcoming missions to Venus, such as <a href="https://ssed.gsfc.nasa.gov/davinci/" target="_blank" rel="noreferrer noopener">NASA's Deep Atmosphere Venus Investigation of Noble gasses, Chemistry, and Imaging</a> (DAVINCI) mission, which will probe the planet's atmosphere down to the surface. Although DAVINCI won't detect HCO+ directly, it represents a step forward in collecting data that could confirm their findings and enhance our understanding of Venus.</p>



<p>“There haven’t been many missions to Venus. But newly planned missions will leverage decades of collective experience and a flourishing interest in Venus to explore the extremes of planetary atmospheres, evolution, and <a href="https://www.earth.com/news/the-habitability-of-a-planet-is-affected-by-the-location-of-its-land/" target="_blank" rel="noreferrer noopener">habitability</a>,” Cangi concluded.</p>



<p>The study is published in the journal <a href="http://dx.doi.org/10.1038/s41586-024-07261-y" target="_blank" rel="noreferrer noopener"><em>Nature</em></a><em>.</em></p>



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Venus has lost almost all of its water, but why did it disappear?

A team of researchers led by the University of Colorado...

<p>In the mid-20th century, the ocean off the Los Angeles coast became a disposal site for significant quantities of the pesticide Dichlorodiphenyltrichloroethane (DDT), due to the activities of the largest DDT manufacturer in the nation.&nbsp;</p>



<p>This chemical, notorious for its persistent toxicity, continues to impact the marine environment of L.A. more than 50 years later. Although legal at the time, the full scale of this pollution at an offshore dump site near Catalina Island, 15 miles offshore, only came to broader public attention in 2020, raising substantial concern among scientists and the public alike.</p>



<h2 class="wp-block-heading" id="h-ddt-chemicals-in-deep-sea-fish">DDT chemicals in deep-sea fish</h2>



<p>Recent findings from researchers at UC San Diego’s <a href="https://scripps.ucsd.edu/" target="_blank" rel="noreferrer noopener">Scripps Institution of Oceanography</a> and <a href="https://www.sdsu.edu/" target="_blank" rel="noreferrer noopener">San Diego State University</a> (SDSU) have shown that deep-sea fish and sediments near the Catalina Island dump site are still laden with DDT-related chemicals, indicating that DDT-related chemicals discarded into the ocean decades ago continue to influence <a href="https://www.earth.com/news/climate-change-restructures-marine-food-webs-in-unexpected-ways/" target="_blank" rel="noreferrer noopener">marine food webs</a>.</p>



<p>Since the rediscovery of this dump site near Catalina Island, scientists have endeavored to determine the current scope and severity of the contamination. It remains a critical concern whether these old chemicals, now settled on the ocean floor, are confined to the seabed or are circulating through marine ecosystems, potentially endangering wildlife and human health.</p>



<h2 class="wp-block-heading" id="h-ddt-contamination-in-marine-food-webs">DDT contamination in marine food webs</h2>



<p>“These are deep-sea organisms that don’t spend much time at the surface and they are contaminated with these DDT-related chemicals,” said co-author Lihini Aluwihare, a professor of ocean chemistry at Scripps.&nbsp;</p>



<p>“Establishing the current distribution of DDT contamination in deep-sea food webs lays the groundwork for thinking about whether those contaminants are also moving up through deep-ocean food webs into species that might be consumed by people.”</p>



<h2 class="wp-block-heading" id="h-montrose-chemical-corporation">Montrose Chemical Corporation</h2>



<p>From 1948 to at least 1961, barges hired by Montrose Chemical Corporation would journey from the Port of Los Angeles towards Catalina, discharging waste containing sulfuric acid and up to 2% pure DDT directly into the Pacific.&nbsp;</p>



<p>This practice, which was legal until 1972, largely went unnoticed, overshadowed by another disposal method used by Montrose: discharging a more dilute acidic slurry that also contained DDT into the ocean off Palos Verdes through L.A. County sewers.&nbsp;</p>



<p>The Palos Verdes Shelf, where an estimated 100 tons of DDT accumulated in sediments, was declared an underwater Superfund Site by the <a href="https://www.epa.gov/" target="_blank" rel="noreferrer noopener">Environmental Protection Agency</a> in 1996, and in 2000, Montrose was ordered to pay $140 million for environmental restoration.&nbsp;</p>



<p>Research has linked DDT pollution in this area to health issues in local sea lions, dolphins, bottom-feeding fish, and even coastal California <a href="https://www.earth.com/news/california-condors-are-threatened-by-organic-contaminants/" target="_blank" rel="noreferrer noopener">condors</a>, likely affected by consuming contaminated marine animals.</p>



<h2 class="wp-block-heading" id="h-toxic-legacy-of-offshore-dumping-nbsp">Toxic legacy of offshore dumping&nbsp;</h2>



<p>The rediscovery of Montrose’s offshore dumping near Catalina, now known as Dumpsite 2, was made by <a href="https://www.ucsb.edu/" target="_blank" rel="noreferrer noopener">UC Santa Barbara</a> researcher David Valentine using an undersea robot. This discovery gained significant public exposure in 2020 through a series of investigative reports by the Los Angeles Times, highlighting the toxic legacy of offshore dumping in the region.</p>



<p>Valentine and Scripps researchers have since mapped extensive DDT contamination across an area of the seafloor larger than San Francisco. The ongoing challenge is to determine whether this <a href="https://www.earth.com/news/ocean-pollution-threatens-the-health-of-more-than-three-billion-people/" target="_blank" rel="noreferrer noopener">pollution</a> remains localized or if it is migrating through the marine environment in ways that could harm aquatic life or humans.</p>



<h2 class="wp-block-heading" id="h-extent-of-the-ddt-contamination-nbsp">Extent of the DDT contamination&nbsp;</h2>



<p>In 2021, Aluwihare, SDSU’s Eunha Hoh, and their team began addressing two crucial questions: Are the DDT-related chemicals on the seafloor near Dumpsite 2 entering the food chain? Can they develop a unique chemical fingerprint for the contamination from Dumpsite 2 to distinguish it from pollution emanating from the Palos Verdes Shelf?</p>



<p>Sediment and deep-sea animal samples collected near Dumpsite 2 revealed the presence of an extensive array of DDT-related chemicals, previously identified in the blubber of dolphins off Southern California’s coast. This broader spectrum of DDT compounds, known as DDT+, is critical for understanding the full extent of contamination.</p>



<h2 class="wp-block-heading" id="h-ddt-related-compounds-in-fish">DDT-related compounds in fish</h2>



<p>Analysis of these samples showed that 215 fish across three species near Dumpsite 2 contained 10 DDT-related compounds, all present in the sediment samples.&nbsp;</p>



<p>Two fish species were collected from depths between 546 meters (1,791 feet) and 784 meters (2,572 feet), and a third species ranged from these depths up to the surface. <a href="https://www.earth.com/news/dietary-shift-to-forage-fish-could-prevent-millions-of-deaths/" target="_blank" rel="noreferrer noopener">Fish</a> from shallower waters had lower contaminant levels and lacked two of the DDT-related compounds found in deeper-dwelling fish.</p>



<h2 class="wp-block-heading" id="h-how-were-the-fish-exposed-to-ddt">How were the fish exposed to DDT?</h2>



<p>“None of these fish species are known to feed in the sediment of the seafloor. There must be another mechanism that is exposing them to these contaminants,” said co-author Anela Choy, a biological oceanographer at Scripps.&nbsp;</p>



<p>“One possibility is that physical or biological processes are resuspending sediments around Dumpsite 2 and allowing these contaminants to enter deeper water food webs.”</p>



<p>While it’s not yet possible to definitively exclude the Palos Verdes Superfund Site as a contamination source, the study’s findings - including the specific contaminants identified and their distribution across different species and depths - suggest that pollution from the seafloor could be infiltrating the marine food chain.</p>



<p>“This is evidence that DDT compounds are making their way into the deep ocean food web,” said lead author Margaret Stack, an environmental chemist at SDSU. “That is cause for concern because it’s not a big leap for it to end up in marine mammals or even humans.”</p>



<p>This “will help us figure out what to do as far as mitigation and what not to do in terms of offshore development that could make this problem worse by stirring up these contaminants,” Hoh added.</p>



<h2 class="wp-block-heading" id="h-further-research-is-needed">Further research is needed</h2>



<p>Aluwihare highlighted the need for further research to identify the source of the DDT contaminants found in the <a href="https://www.earth.com/news/plastic-deep-sea-fish/" target="_blank" rel="noreferrer noopener">deep-sea fish</a> and to determine whether similar contamination affects larger, open-ocean fish species consumed by people.</p>



<p>As the investigation continues, the researchers are analyzing samples from fish species targeted by recreational anglers and commercial fisheries, including basses and sanddabs. Comparing these findings with sediment samples from the Palos Verdes Shelf and Dumpsite 2 may help pinpoint the source of the toxins.</p>



<p>“We are still seeing this DDT contamination in deep-sea organisms and ocean sediments more than 50 years after they were dumped there. I’m not sure if that company expected the consequences of their pollution to last this long, but they have,” Hoh concluded.</p>



<p>The study is published in the journal <a href="https://pubs.acs.org/doi/full/10.1021/acs.estlett.4c00115" target="_blank" rel="noreferrer noopener"><em>Environmental Science &amp; Technology Letters</em></a><em>.</em></p>



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Toxic legacy: Decades-old DDT found in deep sea fish

In the mid-20th century, the ocean off the Los Angeles...

Algae,Research,In,Laboratories,,Biotechnology,Science,Concept

<p>Approximately 550 million years ago, the first terrestrial plants evolved from algae and began to transform the <a href="https://www.earth.com/news/terrestrial-plants-changed-how-earth-regulates-its-climate/" target="_blank" rel="noreferrer noopener">Earth's landscape</a>, drastically altering the planet's surface and atmosphere..</p>



<p>A significant breakthrough in understanding these origins has been achieved through the collaborative efforts of an international research team, which includes a computational biologist from the <a href="https://www.unl.edu/" target="_blank" rel="noreferrer noopener">University of Nebraska–Lincoln</a>. </p>



<p>This team has successfully decoded the genomic sequence of Zygnema algae, the closest living relatives to these pioneering <a href="https://www.earth.com/news/marine-algae-genes-chlorophyll-boost-crop-yields-land-plants/" target="_blank" rel="noreferrer noopener">land plants</a></p>



<h2 class="wp-block-heading" id="h-cracking-the-genomic-code">Cracking the genomic code</h2>



<p>The recent research published in <em>Nature Genetics</em> brought together approximately 50 scientists from eight different countries. This collaboration led to a significant achievement: the first complete genomic sequencing of four different strains of Zygnema algae. </p>



<p>By accomplishing this, the team has provided crucial insights into the evolutionary adaptations that enabled aquatic plants to transition and thrive on land, marking a pivotal development in our understanding of plant evolution.</p>



<p>“This is an evolutionary story,” explained Yanbin Yin, the lead researcher from Nebraska. “It answers the fundamental question of how the earliest land plants evolved from aquatic freshwater algae.”</p>



<h2 class="wp-block-heading" id="h-significance-of-zygnema-algae-in-plant-evolution">Significance of Zygnema algae in plant evolution</h2>



<p>Zygnema algae are not just another type of plant; they represent a crucial link between aquatic and terrestrial life. The four strains studied -- two from a culture collection in the United States and two from Germany -- have revealed significant insights into the genomic adaptations necessary for life on land.</p>



<p>Furthermore, advanced DNA sequencing technologies allowed the team to map out the entire genomes, achieving a level of detail previously unattainable for this group. A standout feature identified through this genomic research is the thick, sticky mucilage layer outside the cell walls of the algae.</p>



<p>"It is fascinating that the genetic building blocks, whose origins predate land plants by millions of years, duplicated and diversified in the ancestors of plants and algae, enabling the evolution of more specialized molecular machinery," noted Iker Irisarri, co-first author of the paper.</p>



<h2 class="wp-block-heading" id="h-plant-genome-insights-from-zygnema-algae">Plant genome insights from Zygnema algae</h2>



<p>The findings from this study do not just expand our understanding of plant <a href="https://www.earth.com/news/ancient-species-holds-valuable-evidence-of-plant-evolution/" target="_blank" rel="noreferrer noopener">evolution</a>; they also provide a robust resource for the scientific community at large. </p>



<p>Researchers can now delve into these genomic data to explore further connections between <a href="https://www.earth.com/news/these-plants-have-maintained-genetic-stability-for-350-million-years/" target="_blank" rel="noreferrer noopener">plant genetics</a> and environmental responses.</p>



<p>“The entire plant scientific community now has a valuable, high-quality resource to explore these genome data. Our analyses uncovered intricate connections between environmental responses,” said Jan de Vries, another co-leader of the research team.</p>



<h2 class="wp-block-heading" id="h-foundation-for-future-discoveries">Foundation for future discoveries</h2>



<p>The research aligns with the National Science Foundation’s "<a href="https://www.nsf.gov/news/special_reports/big_ideas/life.jsp" target="_blank" rel="noreferrer noopener">Understanding the Rules of Life</a>" initiative, which aims to tackle societal challenges such as climate resilience and clean water. </p>



<p>The gene network analyses from this study reveal that co-expression of genes related to cell wall synthesis and modifications played a crucial role in the evolutionary success of these organisms.</p>



<p>“Our gene network analyses reveal co-expression of genes, especially those for cell wall synthesis and remodifications that were expanded and gained in the last common ancestor of land plants and Zygnematophyceae,” Yin remarked. “We shed light on the deep evolutionary roots of the mechanism for balancing environmental responses and multicellular cell growth.”</p>



<h2 class="wp-block-heading" id="h-genomic-advances-propel-plant-science-forward">Genomic advances propel plant science forward</h2>



<p>This research on Zygnema algae marks a significant advance in our genomic understanding of plant life’s origins on land. </p>



<p>The collaborative effort underscores the importance of international cooperation in scientific research, uniting diverse expertise to unravel complex biological puzzles. </p>



<p>The genomic insights gained extend beyond academia, impacting fields such as bioenergy, water sustainability, and carbon sequestration. </p>



<p>This work not only deepens our comprehension of our planet's ecological history but also equips us with the knowledge to better tackle some of the most pressing environmental issues of our time.</p>



<p>The full study was published in the journal <em><a href="https://www.nature.com/articles/s41588-024-01737-3" target="_blank" rel="noreferrer noopener">Nature Genetics</a></em>.</p>



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Plants emerged from 'star algae' to conquer Earth's landmass

Approximately 550 million years ago, the first terrestrial plants evolved...

Ai,Ethics,And,Legal,Concepts,Artificial,Intelligence,Law,And,Online

<p>We all crave a little validation now and then. A sincere "great job" can boost our spirits and even motivate us to try harder. But what if those well-intentioned compliments are actually getting in the way of our growth? A new study from the University of Portsmouth suggests that sometimes a sprinkle of praise, part of self-serving bias, can lead to some serious <a href="https://www.earth.com/news/social-perception-bias/" target="_blank" rel="noreferrer noopener">self-deception</a>.</p>



<h2 class="wp-block-heading" id="h-decoding-self-serving-bias">Decoding self-serving bias</h2>



<p>Let's be honest – we all have a tendency to give ourselves a bit more credit than we might deserve. Psychologists call this "self-serving bias." This means we instinctively emphasize our strengths and positive contributions, while minimizing our shortcomings. </p>



<p>When things go well, we're likely to see it as proof of our own talents and efforts. On the flip side, when we stumble, it's tempting to chalk it up to bad luck, unfair circumstances, or factors beyond our control. This tendency helps us maintain a positive self-image and protect our feelings of self-worth. </p>



<p>However, the Portsmouth study demonstrates the potential downside of self-serving <a href="https://www.earth.com/news/human-perception-we-see-the-world-based-on-what-we-expect-to-see/" target="_blank" rel="noreferrer noopener">bias</a>: it can seriously cloud our judgment of others. We might overestimate the abilities of colleagues or teammates, making us overlook opportunities to work with people who could bring greater skills to the table.</p>



<h2 class="wp-block-heading" id="h-self-serving-bias-in-robots-and-humans">Self-serving bias in robots and humans</h2>



<p>The <a href="https://www.port.ac.uk/" target="_blank" rel="noreferrer noopener">Portsmouth</a> researchers designed an insightful experiment to explore this self-serving bias. Students first took an online quiz. Then, they were assigned a partner for subsequent tasks -- either a fellow human student or a robot partner. </p>



<p>When participants were paired with a real person, a pattern of overconfidence emerged. They tended to inflate both their own abilities and their partner's skills within their assessment. </p>



<p>This <a href="https://www.earth.com/news/bias-against-women-business/" target="_blank" rel="noreferrer noopener">skewed perception</a> led to less-than-ideal decision-making, with participants often choosing to continue working with underperforming teammates rather than potentially seeking a more skilled partner.</p>



<p>The fascinating twist lies in the trials where students were paired with a robot. Suddenly, their <a href="https://www.earth.com/news/how-do-dreams-influence-our-perceptions/" target="_blank" rel="noreferrer noopener">judgment</a> became significantly more accurate. </p>



<p>They were better able to evaluate their own performance more objectively, minimizing the self-serving bias that had previously influenced their views of their human partners.</p>



<h2 class="wp-block-heading" id="h-why-do-we-bend-our-beliefs">Why do we bend our beliefs?</h2>



<p>"You might find yourself overestimating a colleague's proficiency to justify delegating tasks, thereby avoiding the stress of extra work and the potential revelation of your own shortcomings," explains Dr. Zahra Murad, co-author of the study.</p>



<p>Essentially, by overestimating the skills of those around us, we create an environment where our own shortcomings feel less significant by comparison. It's a subtle, subconscious protective mechanism -- we shield our egos from potential discomfort. </p>



<p>This might provide a temporary boost of confidence, but it ultimately leads to missed opportunities for growth and improvement. By settling for the <a href="https://www.earth.com/news/belief-god-human-cooperation-evolve/" target="_blank" rel="noreferrer noopener">illusion</a> of being surrounded by competent individuals, we risk overlooking chances to learn from those who could truly challenge and elevate us.</p>



<h2 class="wp-block-heading" id="h-compliments-gone-wrong">Compliments gone wrong</h2>



<p>"Overconfident employees are in a way too content with their teammates and have little inclination to change teams," states co-author, Dr. Leonie Gerhards. </p>



<p>When a self-serving bias becomes widespread, it creates a stagnant environment for teams. The exaggerated perception of everyone's abilities hinders the team's willingness to change, adapt, and seek out fresh perspectives. </p>



<p>In this setting, individuals are likely to miss valuable opportunities to collaborate with people possessing different skills, new ideas, or a drive to push them beyond their comfort zones. </p>



<p>Without those challenges and external influences, we essentially relegate ourselves to a place of limited growth, even if the current situation feels comfortable and safe. Our true potential may never be realized due to a reluctance to venture beyond what is familiar.</p>



<p>The strangest takeaway from this study is that a robot, devoid of the need for self-esteem, might actually make us better judges of our own abilities. Since we know a machine won't inflate its skills and can provide objective feedback, it seems to snap us out of our biased thinking. </p>



<p>Who knows, maybe AI could play a role in delivering fairer, more effective feedback in workplaces and training programs?</p>



<h2 class="wp-block-heading" id="h-tips-to-break-free-of-the-self-serving-bias">Tips to break free of the self-serving bias</h2>



<p>So how do we make sure compliments boost us, not blind us? Here are a few strategies:</p>



<h3 class="wp-block-heading" id="h-develop-critical-self-awareness">Develop critical self-awareness</h3>



<p>While it may feel counterintuitive, it's crucial to approach both praise and self-assessment with a healthy dose of skepticism. Before fully accepting a compliment, take a moment to consider if it aligns with your own evaluation. Were there external circumstances that contributed to the success, or was it truly down to your own individual effort?</p>



<h3 class="wp-block-heading" id="h-prioritize-specific-feedback">Prioritize specific feedback</h3>



<p>Don't settle for generic praise or criticism. Actively seek detailed feedback that pinpoints your strengths and areas for improvement. Ask focused questions like, "Could you identify specific things I did well in this presentation?" or "What aspects of my proposal could be made stronger?"</p>



<h3 class="wp-block-heading" id="h-embrace-mistakes-as-learning-tools">Embrace mistakes as learning tools</h3>



<p>It's natural to want to avoid failure, but mistakes can be transformative if viewed with the right mindset. Instead of attributing failures to outside factors, take ownership and see them as opportunities to identify where you can improve and refine your approach.</p>



<h3 class="wp-block-heading" id="h-openness-to-change">Openness to change</h3>



<p>Actively seek out new challenges and collaborations. New partners and teams bring different perspectives, which can challenge your assumptions and expose you to different ways of working. Breaking out of your comfort zone allows for continuous growth and prevents stagnation.</p>



<p> "Consider a scenario where you want to see yourself as the key player in a team project. The simple solution for ensuring success might seem to be monopolizing the workload," notes Dr. Alexander Coutts from <a href="https://schulich.yorku.ca" target="_blank" rel="noreferrer noopener">Schulich School of Business</a>, York University.</p>



<p>"However, this approach comes with its risks -- overburdening yourself or facing the uncomfortable truth that you might not be the infallible expert you thought. Instead, our minds seek a simpler solution by reevaluating our partner's capabilities."</p>



<p>"Our findings suggest that overconfident employees are in a way too content with their teammates and have little inclination to change teams," added co-author, Dr. Leonie Gerhards from King's Business School at <a href="https://www.kcl.ac.uk" target="_blank" rel="noreferrer noopener">King's College London</a>.</p>



<p>"That means, where possible, organizations should deliberately re-shuffle their work teams from time to time, thereby allowing their employees to learn about their true strengths and weaknesses."</p>



<p>Let's not let fear of inadequacy trick us into settling for less. By learning to accept constructive feedback, even when it stings a little, we unlock the door to real improvement.</p>



<p>The study is published in <em><a href="https://academic.oup.com/ej/advance-article/doi/10.1093/ej/ueae005/7619130?login=false" target="_blank" rel="noreferrer noopener">The Economic Journal</a></em>.</p>



<p>-----</p>



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Self-serving bias: How we distort our beliefs about others to feel better

We all crave a little validation now and then. A...

<p>In many American homes, the familiar hiss of a gas stove ignites more than just family meals - it sparks a series of health concerns due to the emission of <a href="https://www.earth.com/video/tracking-nitrogen-dioxide-across-the-globe/" target="_blank" rel="noreferrer noopener">nitrogen dioxide</a> (NO2).</p>



<p>Recent research highlights the significant impact this gas can have on indoor air quality, revealing that even bedrooms can become saturated with harmful levels of pollutants shortly after cooking, and these levels can linger for hours.</p>



<p>"I didn’t expect to see pollutant concentrations breach health benchmarks in bedrooms within an hour of gas stove use, and stay there for hours after the stove is turned off," noted Professor Rob Jackson, a senior researcher at the <a href="https://sustainability.stanford.edu/" target="_blank" rel="noreferrer noopener">Stanford Doerr School of Sustainability</a>. </p>



<p>This revelation confirms that the issue extends beyond the kitchen, affecting the air quality throughout the entire home.</p>



<h2 class="wp-block-heading" id="h-health-risks-of-gas-stoves-and-nitrogen-dioxide-exposure">Health risks of gas stoves and nitrogen dioxide exposure</h2>



<p>The health implications of prolonged exposure to nitrogen dioxide from gas stoves are severe and multifaceted. Consistent inhalation of NO2 can exacerbate asthma symptoms, hinder lung development in children, and even contribute to premature mortality. </p>



<p>The study, which also included insights from researchers at the Central California Asthma Collaborative, PSE Healthy Energy, and the Harvard T.H. Chan School of Public Health, estimates that up to 200,000 cases of <a href="https://www.earth.com/news/child-asthma-air-pollution/" target="_blank" rel="noreferrer noopener">childhood asthma</a> may be linked to gas stove emissions. A significant portion of these asthma cases are directly attributable to nitrogen dioxide.</p>



<h2 class="wp-block-heading">Quantifying nitrogen dioxide exposure levels</h2>



<p>Study lead author Yannai Kashtan, a PhD student specializing in Earth System Science, pointed out that the quantity of <a href="https://www.earth.com/news/gas-stoves-release-more-harmful-nanoparticles-than-vehicle-exhaust/" target="_blank" rel="noreferrer noopener">gas</a> used during cooking is the predominant factor influencing NO2 exposure levels in homes.</p>



<p>Kashtan noted that the effectiveness and usage of range hoods play crucial roles in mitigating exposure. "We found that just how much gas you burn in your stove is by far the biggest factor affecting how much you’re exposed. And then, after that, do you have an effective range hood – and do you use it?" </p>



<h2 class="wp-block-heading" id="h-mortality-rates-associated-with-no2-exposure">Mortality rates associated with NO2 exposure </h2>



<p>The research team employed advanced sensors and modeling techniques to measure and analyze NO2 levels in over 100 <a href="https://www.earth.com/news/exposure-to-gas-stoves-in-homes-is-worse-for-your-health-than-secondhand-smoke/" target="_blank" rel="noreferrer noopener">homes</a> of varying sizes and layouts. </p>



<p>The findings indicate that long-term exposure to nitrogen dioxide in homes with gas stoves may cause thousands of deaths each year - comparable to the mortality rates associated with secondhand smoke.</p>



<p>“Assuming that meta-analyses of outdoor NO<sub>2</sub> and all-cause adult mortality may be applied to long-term exposure to indoor NO<sub>2</sub>, our analysis suggests that long-term NO<sub>2</sub> exposure from gas and propane stoves in the United States may be responsible for up to 19,000 deaths annually,” wrote the researchers.</p>



<h2 class="wp-block-heading" id="h-nationwide-consequences-of-indoor-air-pollution">Nationwide consequences of indoor air pollution</h2>



<p>On a broader scale, the typical use of propane or gas stoves in the U.S. is likely to increase household NO2 levels significantly, nearly reaching unsafe limits set by the World Health Organization for outdoor air. </p>



<p>"That’s excluding all outdoor sources combined, so it makes it much more likely you’re going to exceed the limit," said Kashtan, highlighting the gravity of <a href="https://www.earth.com/video/gas-stoves-create-dangerous-levels-of-indoor-pollution/" target="_blank" rel="noreferrer noopener">indoor pollution</a>.</p>



<h2 class="wp-block-heading" id="h-socioeconomic-and-demographic-disparities">Socioeconomic and demographic disparities</h2>



<p>The study also sheds light on disparities in NO2 exposure based on household size and demographic factors. Smaller homes, often less than 800 square feet, and those in poorer or minority communities face disproportionately higher levels of indoor pollution. </p>



<p>"People in poorer communities can't always afford to change their appliances, or perhaps they rent and can't replace appliances because they don't own them," noted Jackson. This issue is compounded in smaller homes, where residents breathe in more pollution for the same amount of stove use.</p>



<h2 class="wp-block-heading" id="h-cleaner-home-energy-solutions">Cleaner home energy solutions</h2>



<p>This research not only advances our understanding of indoor air pollution from gas stoves but also emphasizes the need for effective ventilation and perhaps a reconsideration of fuel sources in homes. </p>



<p>Electric stoves, for instance, offer a cleaner alternative, emitting no NO2 or other harmful pollutants like benzene. </p>



<p>"It’s the fuel, not the food. Electric stoves emit no nitrogen dioxide or benzene. If you own a gas or propane stove, you need to reduce pollutant exposures using ventilation," said Jackson.</p>



<p>The findings from this comprehensive study illustrate the critical need for awareness and action in addressing indoor air pollution. They also call for a reassessment of household energy choices to safeguard public health, particularly among vulnerable populations.</p>



<p>The research is published in the journal <em><a href="https://www.science.org/doi/10.1126/sciadv.adm8680" target="_blank" rel="noreferrer noopener">Science Advances</a></em>. </p>



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Gas stoves emit unsafe levels of nitrogen dioxide

In many American homes, the familiar hiss of a gas...

<p>In the ever-evolving landscape of personalized medicine, there is an increasing demand for advanced <a href="https://www.earth.com/news/many-blood-pressure-devices-for-home-monitoring-are-not-validated/" target="_blank" rel="noreferrer noopener">wearable devices</a> that can monitor everything from heartbeats to glucose levels. </p>



<p>Despite this progress, there remains a significant challenge in creating devices that seamlessly integrate with the human body, particularly for long-term and invasive monitoring. Scientists at USC have turned their attention to a new prospect for health monitoring: microneedles inspired by sea slugs. </p>



<h2 class="wp-block-heading" id="h-innovative-solutions-from-the-deep-sea">Innovative solutions from the deep sea </h2>



<p><a href="https://www.usc.edu/" target="_blank" rel="noreferrer noopener">USC</a> researcher Hangbo Zhao, an expert in advanced manufacturing and flexible electronics, is helping close a significant gap in health monitoring. </p>



<p>Zhao's research is dedicated to developing more adaptable and less invasive health monitoring technologies. His latest innovation is a revolutionary type of <a href="https://www.earth.com/news/molecular-surgery-no-incision/" target="_blank" rel="noreferrer noopener">microneedle electrode</a>. This new development promises to transform the way we monitor <a href="https://www.earth.com/news/ai-can-predict-health-deterioration-in-hospital-patients/" target="_blank" rel="noreferrer noopener">health</a> metrics.</p>



<p>The microneedle electrodes are crafted to be "soft" and highly flexible, making them perfect for use with muscle and skin tissues that often change shape. </p>



<p>Unlike traditional microneedle electrodes that are rigid and can be uncomfortable, Zhao’s design is flexible, allowing these electrodes to adapt to movements and changes in the tissue. This ensures better contact and reduces the risk of tissue damage.</p>



<h2 class="wp-block-heading" id="h-hybrid-fabrication-method">Hybrid fabrication method</h2>



<p>Central to this innovation is a hybrid fabrication method developed in the researcher's lab. This method blends laser micromachining, microfabrication, and transfer printing to produce microelectrode arrays that can stretch by 60 to 90 percent - the highest ever reported in the field. </p>



<p>This process not only enhances the flexibility of the microneedles but also allows for the customization of their geometric and functional properties.</p>



<h2 class="wp-block-heading" id="h-from-sea-slugs-to-microneedles">From sea slugs to microneedles </h2>



<p>The idea for these microneedle electrodes was inspired by research on sea slugs. The initial tests involved recording electrical activities in the muscles of sea slugs, proving the feasibility of the electrodes for dynamic and moving tissues.</p>



<p>The research carries far-reaching implications that go well beyond basic health monitoring. The technology crafted by Zhao and his USC team is also adept for applications such as analyzing brain and nerve activity, sensing skin interstitial fluids, diagnosing neuromuscular disorders, and facilitating targeted drug delivery.</p>



<h2 class="wp-block-heading" id="h-innovative-health-monitoring">Innovative health monitoring</h2>



<p>As the medical community seeks more precise and less intrusive health monitoring tools, the development of these soft microneedles represents a significant step forward. </p>



<p>For patients apprehensive about traditional microneedle use, this <a href="https://www.earth.com/news/new-technology-uses-eye-scanner-to-measure-biological-aging/" target="_blank" rel="noreferrer noopener">new technology</a> could provide a much-needed alternative that offers high fidelity sensing with minimal discomfort.</p>



<p>The research conducted by the USC team is not just a technological achievement but a potential game-changer for healthcare professionals, biotechnology firms, and anyone interested in a healthier, longer life. </p>



<h2 class="wp-block-heading">More about sea slugs&nbsp;</h2>



<p>Sea slugs, also known as nudibranchs, are fascinating marine creatures belonging to the mollusk class Gastropoda. These animals are noted for their extraordinary colors and striking forms, which make them a favorite among underwater photographers and marine enthusiasts.&nbsp;</p>



<h3 class="wp-block-heading">Appearance&nbsp;of sea slugs </h3>



<p>Unlike their terrestrial relatives, the snails, sea slugs do not have a visible shell. This lack of a shell contributes to their varied and often flamboyant appearances, which are believed to serve as a deterrent to predators through aposematic coloration, signaling their potential toxicity.</p>



<h3 class="wp-block-heading">Distribution and diet</h3>



<p>Sea slugs are found in oceans all over the world, from shallow reefs to deep ocean floors. They feed on a variety of food sources, including algae, sponges, and even other sea slugs.&nbsp;</p>



<h3 class="wp-block-heading">Unique adaptations</h3>



<p>Some species have developed remarkable adaptations, such as the ability to incorporate the photosynthetic capabilities of the algae they eat, allowing them to derive energy directly from sunlight, a process known as kleptoplasty.</p>



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



<p>The reproduction of sea slugs also presents interesting aspects; they are hermaphrodites, meaning each individual possesses both male and female reproductive organs. After mating, both partners can lay eggs, increasing their chances of reproductive success.</p>



<h3 class="wp-block-heading">Defense mechanisms</h3>



<p>One of the most striking features of sea slugs is their defense mechanisms. Besides their bright colors, some species can produce toxins or incorporate toxins from the prey they consume into their own bodies, making them unpalatable or dangerous to predators. Additionally, some can even shed parts of their body to escape from threats.</p>



<p>The study is published in the journal <em><a href="https://www.science.org/doi/10.1126/sciadv.adn7202" target="_blank" rel="noreferrer noopener">Science Advances</a></em>.</p>



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Inspired by sea slugs: Microneedles could transform health monitoring

In the ever-evolving landscape of personalized medicine, there is an...

<p>A recent study has unveiled a concerning trend in the traditionally damp landscapes of Africa. Over an 18-year span, the number of <a href="https://www.earth.com/news/twenty-years-of-air-quality-improvement-erased-by-wildfires/" target="_blank" rel="noreferrer noopener">wildfires</a> has alarmingly doubled in Africa's wet forests, especially in the vast Congo Basin. </p>



<p>The uptick in fire activity in these regions mirrors similar increases observed in other wet forests globally, including the U.S. Pacific Northwest and the Amazon. </p>



<p>This pattern indicates a shift in the ecological dynamics of these areas, underscoring the urgent need to reevaluate the susceptibility of wet forests to fires.</p>



<h2 class="wp-block-heading" id="h-fire-trends-in-africa-s-wet-forests">Fire trends in Africa’s wet forests</h2>



<p>The study represents the first extensive examination of fire incidents in West and Central Africa’s lush, tropical forests. </p>



<p>Utilizing satellite imagery, the researchers tracked active <a href="https://www.earth.com/news/historic-fires-impact-planet/" target="_blank" rel="noreferrer noopener">fires</a> from 2003 to 2021, discovering a clear rise in fire frequency, particularly in the Northwest Congolian Lowland Forests. By 2021, the number of fires per 10,000 square kilometers surged by 400 annually.</p>



<p>"There were several areas with strong trends of increasing fire, mainly in the Congo Basin. In contrast, there were almost no locations where fire was decreasing," wrote the researchers.</p>



<h2 class="wp-block-heading" id="h-impact-of-human-activity-on-wet-forest-fires">Impact of human activity on wet forest fires</h2>



<p>Traditionally, fires in Africa's wet forests were thought to be minor, especially when compared to those in drier woodlands and savannas. The lack of comprehensive research left many questions about the characteristics and drivers of these fires unanswered.</p>



<p>The escalation of fires in wet forests is deeply connected to human activities, such as <a href="https://www.earth.com/news/global-deforestation-crisis-how-can-we-stop-massive-forest-losses/" target="_blank" rel="noreferrer noopener">deforestation</a>. This not only reduces forest cover but also fragments the remaining forested areas, increasing their susceptibility to fires. </p>



<p>Consequently, these human-driven changes foster drier conditions particularly at the forest edges, where the majority of fires tend to ignite. </p>



<h2 class="wp-block-heading" id="h-weather-patterns-and-wet-forest-fires">Weather patterns and wet forest fires</h2>



<p>Furthermore, the experts identified a pronounced correlation between the occurrence of fires in these wet forests and weather patterns, particularly high temperatures and vapor pressure deficits, which are indicative of elevated plant water stress levels.</p>



<p>A particularly compelling discovery was the impact of the 2015-2016 "super El Niño" event, which intensified heat and drought conditions in these regions, subsequently leading to a noticeable increase in fires. </p>



<p>"I was surprised at how strong and clear the climate signal was," said Michael Wimberly, an ecologist at the University of Oklahoma who led the study.</p>



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



<p>The implications of these findings are profound. As global climate patterns continue to evolve, <a href="https://www.earth.com/news/tropical-forest-land-sometimes-gets-cleared-for-nothing/" target="_blank" rel="noreferrer noopener">tropical forest</a> fires are likely to increase in frequency and intensity, posing significant challenges to conservation efforts and biodiversity. </p>



<p>Wimberly emphasized the necessity of rethinking how we view the relationship between climate change and fire in tropical forests. "Tropical forest fires have been long overlooked, but they're only going to become more important in the future. We can't ignore them any longer."</p>



<p>This pivotal study calls for an integrated approach to managing fire risks, particularly by controlling fires at the edges of <a href="https://www.earth.com/news/one-third-of-global-forest-loss-has-been-caused-by-wildfires/" target="_blank" rel="noreferrer noopener">forests</a> to prevent the destructive feedback loops that increase vulnerability to further fires. </p>



<h2 class="wp-block-heading" id="h-broader-implications-of-the-study">Broader implications of the study</h2>



<p>The research underscores the need for enhanced monitoring and intervention strategies that can mitigate the impact of fires on some of the world’s most critical wet forest ecosystems.</p>



<p>The findings from the study not only expand our understanding of the ecological dynamics of wet forests but also serve as a call to action for policymakers, researchers, and conservationists worldwide to address the emerging threats posed by climate change and human influence on these vital habitats.</p>



<p>“Fires are likely to continue increasing as temperatures become hotter and human populations grow and expand, and they will have negative impacts on carbon storage as well as biodiversity and human livelihoods derived from forest resources,” wrote the study authors.</p>



<p>“To date there has been limited research on fire in African forests, and more work is needed to understand how ENSO and other climate modes influence regional patterns of fire risk; assess the impacts of increasing fire on carbon dynamics, biodiversity, and forest resources; and develop more effective strategies for predicting fire danger and preventing destructive wildfires.”</p>



<p>The study is published in the journal <em><a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023GL106240" target="_blank" rel="noreferrer noopener">Geophysical Research Letters</a></em>.</p>



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Africa's wet forests have seen an alarming rise in wildfires

A recent study has unveiled a concerning trend in the...

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<p>Today’s <strong>Video of the Day</strong> 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.</p>



<p>"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.</p>



<p>"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."</p>



<p><em>Video/ Image Credit: ESA</em></p>



<p><em>-</em><em>--</em></p>



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

Nushagak Bay in southwest Alaska

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

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<p>Today's <strong>Video of the Day</strong> 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.</p>



<p>"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.</p>



<p>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.</p>



<p><em>Video/ Image Credit: American Chemical Society&nbsp;</em></p>



<p><em>-</em><em>--</em></p>



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



<p>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.</p>

Flu viruses are more flexible than expected

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<p>Today’s <strong>Video of the Day</strong> 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;</p>



<p>"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.</p>



<p>"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."</p>



<p>"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."</p>



<p><em>Video/Image Credit: ESA&nbsp;</em></p>



<p><em>-</em><em>--</em></p>



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

Lake Trasimeno in Central Italy

[sendtonews key="3upvlAaHgO-2256633-12187" type="single"] Today’s Video of the Day from the...

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<p>Today's <strong>Video of the Day</strong> 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;</p>



<p>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;</p>



<p>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.</p>



<p><em>Video Credit: American Chemical Society&nbsp;</em></p>



<p><em>-</em><em>--</em></p>



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



<p>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.</p>

Detecting mercury contamination with the tap of a finger

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



<p>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;</p>



<p>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;</p>



<p>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. </p>



<p>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.</p>



<p>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. </p>



<p><em>Video/ Image Credit: European Space Agency&nbsp;</em></p>



<p><em>-</em><em>--</em></p>



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



<p>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.</p>

Kainji Lake in north central Nigeria

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<p>Today’s <strong>Video of the Day</strong> 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.</p>



<p>“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. </p>



<p>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.</p>



<p>“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;</p>



<p>“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.”</p>



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



<p>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.</p>



<p><em>Video Credit: Amanda Nguyen/University of Illinois</em></p>



<p><em>-</em><em>--</em></p>



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



<p>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.</p>

Designing crops that can beat the heat

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


<p>Suzie Quintal’s husband, Nathan Reeves, discovered &#8211; to his horror &#8211; that his wedding band was missing when they came back to shore. The couple returned home after Christmas, thinking the ring was lost for good. However, in May the next year, a woman who was snorkeling saw something unlike anything she’d ever seen before.</p>


Gone For Good?