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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



Image Credit: NASA Earth Observatory



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Retreating glaciers and expanding meltwater lakes in Alaska

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

Today's Image of the Day from NASA Earth Observatory features the Gobi Altai Mountains and neighboring plains covered in snow and illuminated by sunlight. 



The photograph was captured on January 25, 2024 as the International Space Station (ISS) passed over central Mongolia.



<h2 class="wp-block-heading" id="h-mountain-peaks-and-plains">Mountain peaks and plains</h2>



“Late-afternoon sunlight casts long shadows of mountain peaks onto the plains below. Numerous steep gullies cut into the massif, or mass of mountains, whose rugged appearance contrasts with the flat plains stretching along the top of the image,” said <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA</a>. “The plains are a semidesert grassland, or steppe, which provides pasture for livestock herders in the region.”



“The grassland surrounding the massif is classified by scientists as a cold semidesert. At an elevation of about 1,250 meters, annual temperatures are much lower there than in the mountains. The highest peak in the massif, Ikh Bogd (also known as Tergun Bogd), reaches nearly 4,000 meters.”&nbsp;



According to NASA, the climate on the peaks is classified as a polar tundra because the average annual temperature is below freezing. "Asia’s main tundra zone is located in Siberia, along the coast of the Arctic Ocean, 2,800 kilometers (1,750 miles) to the north.”



<h2 class="wp-block-heading" id="h-harsh-winters-and-livestock-in-mongolia">Harsh winters and livestock in Mongolia</h2>



Harsh <a href="https://www.earth.com/news/why-winters-are-getting-colder-while-world-is-getting-warmer/" target="_blank" rel="noreferrer noopener">winters</a> in Mongolia, locally known as "dzud," pose significant challenges for livestock and the herders who depend on them for their livelihood. These winters can be particularly severe, characterized by extreme cold, heavy snowfall, and ice, which can block access to grazing grounds, leaving animals without enough food.&nbsp;



The cold temperatures and nutritional shortages result in high mortality rates among livestock, which are crucial to the Mongolian economy and the nomadic lifestyle of many of its people.



The impact of these harsh winters extends beyond immediate animal welfare. As <a href="https://www.earth.com/news/bacteria-in-livestock-are-major-drivers-of-antibiotic-resistance/" target="_blank" rel="noreferrer noopener">livestock</a> numbers dwindle, herders face financial hardships, and the ripple effects can be felt throughout the entire community.&nbsp;



To combat these challenges, various strategies have been employed, including the development of better forecasting and early warning systems, the stockpiling of fodder, and improved veterinary care. These measures aim to strengthen the resilience of herding communities and ensure the survival of their livestock during Mongolia's most challenging seasons.



<h2 class="wp-block-heading" id="h-diverse-wildlife-of-mongolia">Diverse wildlife of Mongolia</h2>



Mongolia is renowned for its diverse wildlife, adapted to its unique landscapes ranging from vast steppes to rugged <a href="https://www.earth.com/news/mountains-both-carbon-sinks-and-carbon-sources/" target="_blank" rel="noreferrer noopener">mountains</a> and arid deserts. Among the most iconic species is the Bactrian camel, native to the region and crucial to nomadic herders.&nbsp;



The resilient Mongolian horse, integral to local culture, is celebrated for its endurance across the vast, open landscapes. Predators such as the snow leopard roam the high altitudes, playing a key role in the ecosystem, while the elusive Gobi bear survives in the sparse vegetation of the Gobi Desert.



The steppes are home to the fast-moving Mongolian gazelle and the critically endangered saiga antelope, known for its distinctive nose. The mountains support populations of argali sheep, the world's largest wild sheep, and the ibex, which has mastered the art of navigating rocky terrains. 



<h2 class="wp-block-heading" id="h-valley-of-lakes">Valley of Lakes</h2>



“Part of a small dry lake appears in the top left of the image. In wetter years, water from this lake feeds Orog Lake (also photographed by astronauts), out of frame to the upper right. This and other nearby lakes are part of the Valley of Lakes waterfowl conservation habitat, protected as a Ramsar site,” noted NASA.



The Valley of Lakes is known for its expansive <a href="https://www.earth.com/news/the-potential-of-tidal-wetlands-as-blue-carbon-ecosystems/" target="_blank" rel="noreferrer noopener">wetlands</a> and diverse ecosystems that support a variety of bird species, especially migratory waterfowl. This area serves as a crucial stopover for birds during their migration periods, providing them with essential resources such as food and shelter.&nbsp;



The conservation efforts in the Valley of Lakes focus on maintaining and restoring these <a href="https://www.earth.com/news/coastal-wetlands-are-inching-closer-to-extinction-as-the-world-heats-up/" target="_blank" rel="noreferrer noopener">wetlands</a> to ensure they continue to offer a safe haven for waterfowl. These efforts include controlling invasive plant species that threaten the natural vegetation and managing water levels to create optimal conditions for bird populations.&nbsp;



Education and community involvement are also key components of the conservation strategy, aiming to raise awareness about the importance of these habitats and encourage sustainable practices that help protect the local wildlife.



Image Credit: NASA Earth Observatory&nbsp;



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Mountain peaks and plains of central Mongolia 

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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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Spiral galaxy NGC 1559 is a loner in outer space

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

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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



Image Credit: ESA/Hubble &amp; NASA



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Luminous galaxy NGC 3783 and a blue giant star

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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



Image Credit: NASA Earth Observatory&nbsp;



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

Tea,Bag,Pulled,From,Hot,Tea,Cup

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



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



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



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



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



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



The researchers discovered alarming levels of contamination:



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



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



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



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



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



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



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



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



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



For starters, <a href="https://www.earth.com/news/drinking-tea-every-day-proven-to-delay-biological-aging-in-humans/" target="_blank" rel="noreferrer noopener">tea is packed with antioxidants</a>, which help your body fight off harmful free radicals. These antioxidants can reduce the risk of chronic diseases like heart disease and certain cancers. 



Plus, different types of tea, like green, black, and oolong, have unique compounds that support brain health, potentially improving focus and reducing the chances of developing <a href="https://www.earth.com/news/alzheimers-may-not-be-a-brain-disease/" target="_blank" rel="noreferrer noopener">conditions like Alzheimer's</a>. 



Sipping on a cup of tea can be a simple way to boost your overall health and keep your mind sharp.



Another great perk of drinking tea is that it can help with relaxation and stress relief. Herbal teas like chamomile and peppermint are well-known for their calming effects, making them perfect for unwinding after a long day. 



Even caffeinated teas, when enjoyed in moderation, can provide a gentle energy boost without the jitters that coffee might cause. 



Additionally, tea can aid in digestion and promote a healthy metabolism, which is beneficial if you're looking to maintain or lose weight. 



<h2 class="wp-block-heading" id="h-human-risks-from-plastics-in-tea">Human risks from plastics in tea</h2>



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



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



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



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



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



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



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



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



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



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



This research on contamination in tea bags highlights the pressing need to prioritize food safety in the face of rising plastic use. 



By understanding and addressing microplastic and nanoplastic contamination, we can work toward protecting public health and the environment.



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



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



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



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



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



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Tea bags release millions of plastic particles during brewing

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

Plastic waste continues to stress communities worldwide. Many people watch the steady build-up of plastic litter and worry about what the future may hold. 



Scientists are now looking at advanced materials that may turn this problems into opportunities.



Recent research, published in the Chemical Engineering Journal, highlights a special catalyst that helps transform plastic into useful products and releases hydrogen as a bonus.



<h2 class="wp-block-heading" id="h-refining-the-catalyst-material">Refining the catalyst material</h2>



<a href="https://www.earth.com/news/ocean-plastic-pollution-has-become-a-global-crisis/">Plastic pollution</a> is a stubborn challenge that refuses to go away. Transforming waste plastic into hydrogen and other useful things may seem out of reach, but a group of researchers has now shown that it does not have to be this way.



They have worked on a cadmium sulfide (CdS) photocatalyst that, through a careful process, can break down plastic and also boost hydrogen production. These findings come from research led by <a href="https://scholar.google.com/citations?user=R_L1j9MAAAAJ&amp;hl=en" target="_blank" rel="noreferrer noopener">Dr. Kaveh Edalati</a> at <a href="https://www.kyushu-u.ac.jp/en/" target="_blank" rel="noreferrer noopener">Kyushu University</a> in Japan.



<h2 class="wp-block-heading" id="h-shaping-cadmium-sulfide-for-bigger-results">Shaping cadmium sulfide for bigger results</h2>



The CdS photocatalyst in this study is an important new invention. The team introduced sulfur vacancies, small gaps that serve as active sites, and guided the CdS structure into a stable hexagonal phase. This led to a strong increase in hydrogen output.



According to the authors, <a href="https://www.earth.com/news/green-hydrogen-energy-production-just-got-a-lot-easier/">hydrogen production</a> increased 23 fold when compared with what is seen using standard CdS. 



By managing these sulfur vacancies, the catalyst gains more places where reactions can occur. This makes it work harder and produce more hydrogen without the need for other chemical helpers.



<h2 class="wp-block-heading" id="h-from-trash-to-treasure">From trash to treasure</h2>



The idea of turning plastic bottles or other everyday plastic items into a source of hydrogen might seem odd, but these researchers have now shown that it can be done. 



This new CdS catalyst not only encourages hydrogen production, it can also break down polyethylene terephthalate (PET), a common plastic, into something more valuable.



PET is found in countless bottles and containers, and getting rid of it responsibly has proved difficult. Now, there is a sense that <a href="https://www.earth.com/news/microplastics-pose-a-greater-threat-to-some-ocean-animals/">unwanted plastic</a> can become a resource instead of ending up in landfills or oceans.



By building on this understanding, researchers hint at the power of materials science to affect broader environmental issues. 



They show that small changes in a catalyst’s design can mean big changes in its performance. This might inspire other ideas, including materials that make recycling more productive and less complicated.



<h2 class="wp-block-heading" id="h-facing-global-plastic-pollution-head-on">Facing global plastic pollution head-on</h2>



Plastic production has increased at a staggering rate over the past several decades. 



<a href="https://www.science.org/doi/10.1126/sciadv.1700782" target="_blank" rel="noreferrer noopener">Studies</a> show that more than 8 billion metric tons of plastic have been produced since large-scale manufacturing took off in the mid-20th century, and most of it still lingers in our environment.



Vast amounts of waste float in the oceans, wash up on shorelines, and break down into microplastics that can enter food chains. 



This accumulation threatens wildlife, contaminates ecosystems, and undermines the health of communities worldwide.



<h2 class="wp-block-heading" id="h-the-human-side-of-the-plastic-problem">The human side of the plastic problem</h2>



People sometimes think that plastic pollution is just about large pieces of litter. Yet microplastics, tiny fragments that form when plastic breaks down, have been found nearly everywhere.



Researchers have identified them in Arctic ice, in remote mountain ranges, and even <a href="https://www.aamc.org/news/microplastics-are-inside-us-all-what-does-mean-our-health" target="_blank" rel="noreferrer noopener">in the human body</a>. 



Their presence stirs unease because their effects on human health remain unclear, and no one wants to find out the hard way. The sheer scale of plastic contamination makes this a truly global concern.



<h2 class="wp-block-heading" id="h-who-is-cleaning-up-the-mess">Who is cleaning up the mess?</h2>



Many organizations have stepped in to address plastic pollution. One well-known example is <a href="https://theoceancleanup.com" target="_blank" rel="noreferrer noopener">The Ocean Cleanup</a>, which aims to rid the oceans of floating plastic using large-scale cleaning systems.



Others, like the <a href="https://www.plasticpollutioncoalition.org/" target="_blank" rel="noreferrer noopener">Plastic Pollution Coalition</a>, bring together nonprofits, businesses, and individuals to push for systemic change. 



Local groups organize beach cleanups and recycling drives, raising awareness and inspiring positive action. These efforts underscore that people are not powerless, even though the problem is vast.



<h2 class="wp-block-heading" id="h-policy-and-responsibility-on-a-global-scale">Policy and responsibility on a global scale</h2>



Not all countries respond to <a href="https://www.earth.com/news/coastal-plants-endangered-by-plastic-pollution-and-flooding/">plastic pollution</a> in the same way. Some lead the charge by banning single-use plastics, encouraging circular economies, or imposing hefty fees for plastic bags.



Nations like Kenya enforce strict bans on the use of plastic bags, significantly reducing pollution on their streets and in their fields.



Meanwhile, some other regions lag behind, with weak regulations or poor waste management systems that allow plastic trash to accumulate. Different approaches highlight that change is possible, but not everyone pulls their weight.



<h2 class="wp-block-heading" id="h-examples-of-positive-moves">Examples of positive moves</h2>



The European Union has introduced policies to cut plastic waste by banning certain single-use plastics and setting ambitious recycling targets.



In Southeast Asia, countries like Vietnam and Thailand are exploring new laws to cut back on the use of plastic bags and containers. 



Such steps reflect a growing acknowledgment that the world needs to move away from the throwaway culture and toward more sustainable, long-term solutions.



<h2 class="wp-block-heading" id="h-challenges-and-missed-opportunities">Challenges and missed opportunities</h2>



In some places, lack of enforcement, corruption, or limited infrastructure frustrates progress. Even where good laws exist, poor implementation can leave them toothless.



A few global economic powers continue to export their plastic waste to developing countries that are ill-equipped to handle it, thereby shifting the burden rather than dealing with the problem. 



This approach can worsen pollution in vulnerable areas and breed resentment among communities struggling to protect their environment.



<h2 class="wp-block-heading" id="h-looking-toward-a-cleaner-future">Looking toward a cleaner future</h2>



Solving plastic pollution will likely require a combination of smarter product design, better <a href="https://www.earth.com/news/tidal-wave-of-trash-waste-leakage-is-an-environmental-disaster/">waste management</a>, and more responsible consumer behavior. 



Innovations like the CdS catalyst can help nudge societies in a productive direction, turning plastic into something more useful.



People can support organizations working on the ground, encourage their leaders to adopt stricter policies, and pressure companies to use greener materials.



“We’re basically living in a plastic world,” said <a href="https://engineering.uga.edu/jenna-jambeck-named-2024-sec-professor-of-the-year/" target="_blank" rel="noreferrer noopener">Dr. Jenna Jambeck</a>, an environmental engineer at the University of Georgia and co-author of a widely-cited study on plastic waste. If that world is going to clean itself up, everyone has to play a part.



The full study is published in the <a href="https://www.sciencedirect.com/science/article/abs/pii/S1385894724102215" target="_blank" rel="noreferrer noopener">Chemical Engineering Journal</a>.



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Could this breakthrough finally solve the plastic crisis?

Plastic waste continues to stress communities worldwide. Many people watch...

Think about the energy involved each time you turn a doorknob, open your fridge, or flip a light switch each day.



What if these simple actions could do more than just open doors or turn on lights? What if they could help power your home and reduce your reliance on traditional energy sources?



Dr. Jeeeun Kim, an assistant professor in the Department of Computer Science and Engineering at <a href="https://www.tamu.edu/index.html" target="_blank" rel="noreferrer noopener">Texas A&amp;M University</a>, is working on this idea.



Supported by the National Science Foundation's Faculty Early Career Development award, Dr. Kim is looking at innovative ways to capture and reuse energy from our everyday movements.



In particular, the research is focused on transforming passive household objects into smart, <a href="https://www.earth.com/news/bronze-age-technology-is-a-modern-solution-for-clean-energy/" target="_blank" rel="noreferrer noopener">sustainable tools</a>.



<h2 class="wp-block-heading" id="h-unlocking-hidden-energy-in-the-home">Unlocking hidden energy in the home</h2>



The traditional objects in our homes - like doorknobs and window slides - are what scientists call "passive interfaces." They store energy, but that energy typically goes nowhere.



Dr. Kim's research aims to change this by adding smart features to these everyday items.



"Daily design issues are hard to attend if prior experiences are used as a baseline," explained Dr. Kim.



"Even to those with known personal goals, like reducing utility bills, adopting the latest scientific advances in real life demands expertise because tools to support end-users, like you and me, are lacking."



<h2 class="wp-block-heading" id="h-3d-printing-the-key-to-smart-updates">3D printing: The key to smart updates</h2>



Instead of replacing everything in your home with expensive <a href="https://www.earth.com/news/are-smart-home-devices-spying-on-us-a-new-study-says-yes/" target="_blank" rel="noreferrer noopener">smart devices</a>, Dr. Kim's team is using 3D printing to create attachments for existing objects.



Picture this: a small device attached to your fridge's hinges could capture the energy from opening the door and use it to power a display showing what's inside.



The possibilities don't stop there. This same idea could turn a doorknob's rotation into power for a security system.



<h2 class="wp-block-heading" id="h-looking-beyond-what-computers-can-see">Looking beyond what computers can see</h2>



<a href="https://www.earth.com/news/new-technology-can-visually-depict-what-we-are-imagining/" target="_blank" rel="noreferrer noopener">Current technology</a> has its limits, according to Dr. Kim.



"Unfortunately, recent advances in AI research of today only focuses on object, instance level detection from millions of images and videos such as a toilet, microwave, not the human interactions, lifting a toilet lid and tapping on microwave's button panels, where all human-centered computing challenges actually occur."



To address this gap, Dr. Kim developed new tools. One is a system that helps describe how humans interact with <a href="https://www.earth.com/news/new-robots-can-help-you-find-objects-that-youve-lost-or-misplaced/" target="_blank" rel="noreferrer noopener">everyday objects</a>. Another is a smartphone app that uses augmented reality to spot accessibility issues in buildings.



<h2 class="wp-block-heading" id="h-making-buildings-smarter-one-step-at-a-time">Making buildings smarter, one step at a time</h2>



This research isn't just about making homes more high-tech. It's about making them work better for everyone.



"My research is not limited to accessibility solely," said Dr. Kim. "I hope my toolkit for end-users can scan the multi-residential buildings and interactions at multiple dimensions, so residents also can notice how inaccessible their common physical environments are, how much energy is being wasted and how they can make changes toward smart, sustainable buildings by themselves."



<h2 class="wp-block-heading" id="h-a-path-forward-for-energy-smart-homes">A path forward for energy-smart homes</h2>



Replacing every device in our homes with smart versions isn't realistic - it would be expensive and create unnecessary <a href="https://www.earth.com/news/electronic-waste-is-growing-five-times-faster-than-recycling/" target="_blank" rel="noreferrer noopener">electronic waste</a>. 



Instead, Dr. Kim's approach offers a middle ground: adding smart features to existing objects through simple attachments.



"By tackling multifaceted, interdisciplinary approaches across digital fabrication, end-user programming, deep learning, robotics, and design, this project lays the foundation for a future where every individual creates daily innovations in assistive computing devices, smart homes, and green buildings," Dr. Kim explained.



These small changes could add up to make our homes more energy-efficient, easier to use, and better suited to everyone's needs.



<h2 class="wp-block-heading" id="h-home-energy-usage-and-a-greener-planet">Home energy usage and a greener planet</h2>



Dr. Kim’s research not only focuses on making homes smarter but also emphasizes sustainability. By leveraging energy captured from everyday movements, this approach could significantly reduce reliance on traditional power sources.



Imagine a world where the simple act of opening a fridge or closing a door contributes to a greener planet. This method also minimizes waste by retrofitting existing objects instead of discarding them, aligning with global efforts to promote circular economies.



These advances have the potential to redefine how we think about energy usage in our daily lives, and can bridge the gap between innovation and sustainability.



Details of this research were published by <a href="https://engineering.tamu.edu/news/2024/11/smart-as-a-doorknob-augmenting-passive-interfaces-into-adaptive-interfaces.html">Texas A&amp;M University.</a> 



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Smart energy: How everyday objects could power your home

Think about the energy involved each time you turn a...

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Today&#8217;s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features an agricultural project in the Western Desert of Egypt. 
A series of over 150 images captured by the Landsat and Copernicus Sentinel-2 missions show how the project has changed in the last 21 years from 1998 to 2019.
Long-term satellite data is critical for monitoring changes in land cover over time. 
 &#8212;
By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer 

Video Credit: European Space Agency

The Egyptian desert from space