<p>Today's Image of the Day from the European Space Agency features a satellite view of the fires burning in Southern California.</p>



<p>“Five wildfires - the biggest of which are the Palisades and the Eaton fires - are still currently burning (as of January 10, 2025) in areas of north Los Angeles. At least 10 people are known to have lost their lives and many more properties have been burnt to the ground,” said <a href="https://www.esa.int/ESA_Multimedia/Images/2025/01/Los_Angeles_struggles_to_contain_wildfires" target="_blank" rel="noreferrer noopener">ESA</a>.</p>



<p>“This image, captured by the Copernicus Sentinel-3 mission on January 9, 2025, shows the Palisades fire at lower left and the Eaton fire at upper right, with smoke seen reaching Catalina Island and the Santa Barbara reserve to the south of the fire.”&nbsp;</p>



<p>The fires have now burned more than 37,000 acres - an area bigger than San Francisco - according to Cal Fire. More than 12,000 structures have been destroyed.</p>



<h2 class="wp-block-heading" id="h-tens-of-thousands-of-residents-displaced-by-fires">Tens of thousands of residents displaced by fires</h2>



<p>The Palisades Fire is the largest at more than 21,000 acres, while the Eaton Fire has burned more than 14,000 acres. Those blazes are 11 percent and 15 percent contained, respectively.</p>



<p>Evacuation orders have displaced over 150,000 residents, with an additional 166,000 on alert. Temporary shelters are operating at full capacity, and widespread power outages have affected nearly 1.6 million homes.&nbsp;</p>



<h2 class="wp-block-heading" id="h-strong-winds-and-a-lack-of-resources-nbsp">Strong winds and a lack of resources&nbsp;</h2>



<p>Firefighting efforts are being hampered by strong <a href="https://www.earth.com/news/wildfire-smoke-is-more-toxic-than-other-sources-of-pollution/" target="_blank" rel="noreferrer noopener">winds</a>, with gusts reaching up to 100 miles per hour, and a lack of resources. Some fire hydrants have run dry, complicating containment efforts.&nbsp;</p>



<p>In response to the crisis, President Biden has approved federal disaster assistance, and additional firefighters from neighboring states are joining the efforts.&nbsp;</p>



<p>The California National Guard has been deployed, and the Department of Defense is providing personnel and equipment. Despite these measures, the fires continue to pose a significant threat to the region.&nbsp;</p>



<h2 class="wp-block-heading" id="h-new-threats-from-the-palisades-fire-nbsp">New threats from the Palisades Fire&nbsp;</h2>



<p>The Palisades Fire, which began near the Pacific Palisades neighborhood in Los Angeles, has rapidly expanded, prompting new evacuation orders for areas including Tarzana and Encino in the San Fernando Valley.&nbsp;</p>



<p>The fire's swift progression has been exacerbated by strong winds, causing it to grow by "three football fields of land per minute." This rapid expansion has led to mandatory evacuations along sections of the Pacific Coast Highway and surrounding areas.&nbsp;</p>



<p>The Los Angeles Fire Department reported that more than 10,000 houses and 13,000 buildings are under threat.&nbsp;</p>



<h2 class="wp-block-heading" id="h-unpredictable-behavior-of-the-fires">Unpredictable behavior of the fires</h2>



<p>In response to the advancing flames, evacuation orders were extended into Tarzana and Encino on January 10. Residents in these areas have been advised to evacuate promptly due to the fire's unpredictable behavior and the potential for further spread.&nbsp;</p>



<p>The situation remains critical, with firefighting efforts ongoing to contain the blaze and protect threatened communities.&nbsp;</p>



<p>Authorities continue to monitor the fire's progression and are urging residents to stay informed and adhere to evacuation orders for their safety.</p>



<h2 class="wp-block-heading" id="h-wildfires-in-southern-california-nbsp">Wildfires in Southern California&nbsp;</h2>



<p><a href="https://www.earth.com/news/dry-lightning-sparks-the-most-destructive-california-wildfires/" target="_blank" rel="noreferrer noopener">Wildfires</a> in Southern California are particularly severe due to a combination of factors. The region’s hot, dry climate creates ideal conditions for fires, especially during the summer and fall when vegetation is parched.&nbsp;</p>



<p>Seasonal Santa Ana winds exacerbate the problem by driving <a href="https://www.earth.com/news/canadian-wildfires-of-2023-were-a-global-environmental-setback/" target="_blank" rel="noreferrer noopener">flames</a> rapidly across the landscape, making fires difficult to contain. The area’s diverse and often dense vegetation, such as chaparral and grasslands, provides abundant fuel.&nbsp;</p>



<p>Furthermore, Southern California’s growing urban footprint increases the risk of fires igniting due to human activity, while also placing more people and infrastructure in harm’s way.&nbsp;</p>



<p>Climate change intensifies these challenges by extending fire seasons and increasing the frequency of extreme heat and drought events, creating a feedback loop that makes wildfires increasingly <a href="https://www.earth.com/news/californias-forests-are-losing-their-ability-to-recover/" target="_blank" rel="noreferrer noopener">destructive</a>.</p>



<h2 class="wp-block-heading" id="h-impacts-of-the-california-fires">Impacts of the California fires</h2>



<p>The Palisades and Eaton Fires are among the most destructive wildfires in California's history, both in terms of structures destroyed and economic impact. Fortunately, however, they have not surpassed the Camp Fire in terms of human fatalities.</p>



<p>The Camp Fire of 2018 remains the deadliest wildfire in the state of California, with 85 fatalities. </p>



<p>The financial impact of the current fires is unprecedented. Estimates suggest that the damages could reach between $135 billion and $150 billion, potentially making these wildfires the costliest in U.S. history.</p>



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



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Satellite captures devastating fires in Southern California

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

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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



<p>Its last major eruption occurred around 1441 AD, which indicates that it's not currently active but is considered dormant.</p>



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



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



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



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



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



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



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



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



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



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



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



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



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



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Mount Nemrut: Ancient mysteries and natural marvels 

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

<p>Today's <strong>Image of the Day</strong> from the European Space Agency features the galaxy I Zwicky 18, which was captured in remarkable detail by the James Webb Space Telescope.</p>



<p>I Zwicky 18 is a blue compact dwarf <a href="https://www.earth.com/news/newly-discovered-stars-milky-way-are-old-as-universe/" target="_blank" rel="noreferrer noopener">galaxy</a> located approximately 59 million light-years away in the constellation Ursa Major.&nbsp;</p>



<h2 class="wp-block-heading" id="h-star-formation-in-i-zwicky-18">Star formation in I Zwicky 18</h2>



<p>The galaxy is notable for its relatively young appearance and the fact that it contains very few heavy elements. These characteristics indicate that it has experienced little <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> compared to other galaxies of similar age.</p>



<p>“The galaxy was first identified by Swiss astronomer Fritz Zwicky in the 1930’s and resides roughly 59 million light-years from Earth,” noted <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">ESA</a>. “This galaxy has gone through several sudden bursts of star formation.”&nbsp;</p>



<p>According to ESA, I Zwicky 18 is typical of the kinds of galaxies that inhabited the early universe and is much smaller than our <a href="https://www.earth.com/news/runaway-star-j1249-36-spotted-trying-to-escape-our-milky-way-galaxy/" target="_blank" rel="noreferrer noopener">Milky Way</a>.</p>



<h2 class="wp-block-heading" id="h-webb-telescope-image-of-the-galaxy">Webb telescope image of the galaxy</h2>



<p>“Two major starburst regions are embedded in the heart of the galaxy. The wispy brown filaments surrounding the central starburst region are bubbles of gas that have been heated by stellar winds and intense ultraviolet radiation unleashed by hot, young stars,” said ESA.</p>



<p>“A companion galaxy resides nearby to the dwarf galaxy, which can be seen at the bottom of the wider-field image. The companion may be interacting with the dwarf galaxy and may have triggered that galaxy's recent star formation.”&nbsp;</p>



<p>ESA explained that the “orange blobs” surrounding the galaxy are the dim glow from ancient fully formed galaxies at much larger distances.</p>



<h2 class="wp-block-heading" id="h-key-characteristics-of-i-zwicky-18">Key characteristics of I Zwicky 18</h2>



<p>As previously mentioned, the galaxy has a very low abundance of elements heavier than hydrogen and helium, suggesting that it has not undergone significant stellar processing.</p>



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



<p>Despite its old age, I Zwicky 18 contains many young, hot stars. This suggests that it might have experienced a burst of <a href="https://www.earth.com/news/hubble-detects-awe-inspiring-newborn-star/" target="_blank" rel="noreferrer noopener">star formation</a> relatively recently in its history.</p>



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



<p>The galaxy has a high density of gas, which is a prime ingredient for star formation. This gas is mostly in the form of hydrogen.</p>



<h3 class="wp-block-heading" id="h-unusual-characteristics">Unusual characteristics</h3>



<p>Its characteristics are more typical of primordial galaxies found in the early universe, making it a valuable object of study for understanding galaxy formation and evolution.</p>



<p>Ultimately, I Zwicky 18 provides insights into the conditions and processes that might have been prevalent in the early universe.</p>



<h3 class="wp-block-heading" id="h-life-cycles-of-stars-and-dust">Life cycles of stars and dust</h3>



<p>The image was captured as part of a Webb program to study the life cycle of dust in I Zw 18.&nbsp;</p>



<p>“Scientists are now building off of previous research with Hubble obtained at optical wavelengths, studying individual dusty stars in detail with Webb’s equivalent spatial resolution and sensitivity at infrared wavelengths.”&nbsp;</p>



<p>ESA noted that this galaxy is of particular interest as its content of elements heavier than helium is one of the lowest of all known <a href="https://www.earth.com/news/early-galaxy-formation-occurred-much-faster-than-we-thought/" target="_blank" rel="noreferrer noopener">galaxies</a> in the local universe.&nbsp;</p>



<p>“Such conditions are thought to be similar to those in some of the first star-forming galaxies at high redshift, so the Webb study of I Zw 18 should shed light on the life-cycle of stars and dust in the early universe.”</p>



<h2 class="wp-block-heading" id="h-the-constellation-ursa-major">The constellation Ursa Major </h2>



<p>Ursa Major, also known as the Great Bear, is one of the most prominent and easily recognizable constellations in the northern sky. </p>



<p>Its name, "Ursa Major," means "Great Bear" in Latin, and it has been a significant part of various mythologies and star lore across cultures for thousands of years. </p>



<p>One of the most famous asterisms within Ursa Major is the Big Dipper, a group of seven bright stars that form a shape resembling a ladle or dipper. The Big Dipper is often used as a navigation tool because it points to Polaris, the North Star, located in the nearby constellation Ursa Minor.</p>



<p>Ursa Major is best viewed in the northern hemisphere and is circumpolar, meaning it is visible year-round for much of the Northern Hemisphere. Its position changes with the seasons, rotating around Polaris, the North Star.</p>



<p>Image Credit: NASA/ESA/CSA James Webb Space Telescope</p>



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Dwarf galaxy provides a window into the early universe

<p>Today's Image of the Day from the European Space Agency features massive amounts of smoke rising from multiple wildfires in Southern California&nbsp;</p>



<p>The largest blaze is the Palisades Fire, which ignited near the Pacific Palisades neighborhood in Los Angeles on January 7, 2025.&nbsp;</p>



<h2 class="wp-block-heading" id="h-explosive-wildfire-conditions">Explosive wildfire conditions</h2>



<p>The Palisades Fire spread rapidly due to severe drought conditions and strong Santa Ana winds, with gusts reaching up to 100 miles per hour.&nbsp;</p>



<p>Within hours, the fire expanded from 200 acres to over 2,900 acres, threatening thousands of structures and prompting mandatory evacuations for thousands of residents.</p>



<h2 class="wp-block-heading" id="h-most-ferocious-winds-in-years">Most ferocious winds in years</h2>



<p>A report from Fox Weather noted: “More than 260,000 people are under some sort of evacuation statement as multiple uncontained wildfires consume everything in their path.”</p>



<p>The news agency said that the fires are fueled by the “most ferocious Santa Ana winds in over 14 years.” The report further noted that “the level of destruction extends both north and south along the coast, with hurricane-force winds that are incredibly strong, dry, and unpredictable.”&nbsp;</p>



<p>As of January 8, the Palisades Fire had rapidly exploded to over 5,000 acres and remained uncontained. The cause of the fire is currently under investigation.&nbsp;</p>



<p>“This image captured by the Copernicus Sentinel-2 mission vividly depicts the smoke billowing from the fire near Santa Monica at 10:36 local time on January 7, 2025, not long after the fire broke out. The blaze has since caused widespread damage and concern,” noted <a href="https://www.esa.int/ESA_Multimedia/Images/2025/01/Los_Angeles_ablaze" target="_blank" rel="noreferrer noopener">ESA</a>.</p>



<h2 class="wp-block-heading" id="h-widespread-damage-and-concern">Widespread damage and concern</h2>



<p>The Los Angeles Fire Department (LAFD) has deployed over 1,400 firefighters to combat the blaze. However, the intense winds have hindered aerial firefighting efforts, as aircraft were grounded for safety reasons.&nbsp;</p>



<p>The fire has destroyed more than 1,000 structures, including several homes in Malibu, and has led to significant traffic congestion as residents evacuate the area.&nbsp;</p>



<h2 class="wp-block-heading" id="h-warning-for-extreme-fire-behavior-nbsp">Warning for extreme fire behavior&nbsp;</h2>



<p>On Monday, before the fires broke out, the weather service office in Los Angeles warned that wind gusts could reach 100 miles per hour in some areas this week - creating the potential for "extreme fire behavior.” </p>



<p>In addition to the Palisades Fire, three other significant blazes include the Eaton Fire in the Altadena region and the Hurst Fire in northern Sylmar. These fires have prompted further evacuations and continue to threaten numerous structures.&nbsp;</p>



<p>"L.A. County and all 29 fire departments in our county are not prepared for this type of widespread disaster," LA County Fire Chief Anthony C. Marrone said at a news conference. "There are not enough firefighters in L.A. County to address four separate fires of this magnitude."</p>



<h2 class="wp-block-heading" id="h-a-hurricane-of-fire">A hurricane of fire</h2>



<p>High wind warnings and red flag warnings in effect across the region indicate that the critical fire weather conditions are ongoing.&nbsp;</p>



<p>Residents are advised to remain vigilant, adhere to evacuation orders, and stay informed through official channels as the situation evolves.</p>



<p>"Winds will not die down much until noon on Wednesday around Los Angeles," said meteorologist Ryan Maue on X. "The worst is yet to come in next few hours with 80-105 mph gusts. This is a hurricane of fire."</p>



<h2 class="wp-block-heading" id="h-wildfires-in-southern-california-nbsp">Wildfires in Southern California&nbsp;</h2>



<p>Wildfires in Southern California are particularly severe due to a combination of factors. The region’s hot, dry climate creates ideal conditions for fires, especially during the summer and fall when vegetation is parched.&nbsp;</p>



<p>Seasonal Santa Ana winds exacerbate the problem by driving flames rapidly across the landscape, making fires difficult to contain. The area's diverse and often dense vegetation, such as chaparral and grasslands, provides abundant fuel.&nbsp;</p>



<p>Furthermore, Southern California’s growing urban footprint increases the risk of fires igniting due to human activity, while also placing more people and infrastructure in harm’s way.&nbsp;</p>



<p>Climate change intensifies these challenges by extending fire seasons and increasing the frequency of extreme heat and drought events, creating a feedback loop that makes wildfires increasingly destructive.</p>



<p>—----</p>



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



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



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

Explosive wildfires in California fueled by hurricane-force winds

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



<p>“In this winter scene, a sheet of cracked ice tops part of the lake,” noted <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA</a>. “On the left side, open water appears blue. Shallow water offshore of a delta, formed by a small, winding river, appears green."</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>NASA pointed out that several roads cut across the landscape, including one with switchbacks that ascends a steep slope. "These roads facilitate tourist travel from both India and China.”&nbsp;</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. </p>



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



<p>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, Pangong Lake is 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.</p>



<p>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. </p>



<p>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>



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



<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. </p>



<p>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>



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



<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. </p>



<p>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>



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



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



<p>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 on the Tibetan Plateau

Historical,House,With,Wind,Towers,In,Abarkuh,,Iran

<p>Our buildings usually remain comfortable during warm days because of constant air conditioning, sealed windows, and an assumption that power never fails. But as large parts of the country have learned, blackouts can hit at the worst possible moment. </p>



<p>When that happens, glass towers and sealed-off homes can quickly become stiflingly hot, showing why passive cooling methods are essential.</p>



<h2 class="wp-block-heading" id="h-ancient-builders-had-better-cooling-methods">Ancient builders had better cooling methods</h2>



<p>Ancient builders had no electricity, yet they made structures that protected people from the <a href="https://www.earth.com/news/2024-confirmed-as-earths-hottest-year-in-recorded-history/" target="_blank" rel="noreferrer noopener">worst heat</a>. Some devised thick walls that absorbed heat by day and released it at night.&nbsp;</p>



<p>Others planned entire neighborhoods to maximize shade. These time-tested ideas remain relevant for anyone who wants to stay cooler without cranking up the air conditioner.</p>



<p>This view is shared by Dr. Pablo La Roche, an architecture professor at <a href="https://www.cpp.edu/" target="_blank" rel="noreferrer noopener">California State Polytechnic University, Pomona</a>, and sustainable design director at <a href="https://www.arcadis.com/" target="_blank" rel="noreferrer noopener">Arcadis</a>.&nbsp;</p>



<p>With decades of research on passive cooling systems and low-energy architecture, his work highlights how historical construction techniques effectively addressed the <a href="https://www.earth.com/news/2024-shatters-heat-records-earths-hottest-year-is-here/" target="_blank" rel="noreferrer noopener">challenges of harsh climates</a> with intense summer heat.</p>



<h2 class="wp-block-heading" id="h-how-ancient-iraq-managed-scorching-heat">How ancient Iraq managed scorching heat</h2>



<p>Archaeologists have <a href="https://books.google.com/books?hl=en&amp;lr=&amp;id=xpTkEAAAQBAJ&amp;oi=fnd&amp;pg=PA3#v=onepage&amp;q&amp;f=false" target="_blank" rel="noreferrer noopener">documented</a> the Sumerians’ buildings in what is now southern Iraq. Walls made of mud brick or adobe were thick and had only small windows. This design helped reduce heat inside during the sun’s intense hours. </p>



<p>In some places, homes were built side by side, so fewer walls were directly hit by sunlight. The neighborhoods also included narrow streets that created cooling shade as people walked through the city.</p>



<p>That compact arrangement worked when indoor temperatures had to stay tolerable. Families gathered in inner courtyards where light and breezes could get in but the scorching rays had trouble reaching the seating areas.</p>



<p>Some of these principles might still be practical in hot, urban environments today.</p>



<h2 class="wp-block-heading" id="h-modern-cities-can-learn-from-passive-cooling">Modern cities can learn from passive cooling</h2>



<p>Major power failures can be disastrous during a heat wave. In <a href="https://www.insurancejournal.com/news/southcentral/2024/07/22/784992.htm" target="_blank" rel="noreferrer noopener">July 2024</a>, the Houston area lost electricity for several days. When air conditioning shut off, many high-rises became uncomfortable in a hurry.&nbsp;</p>



<p>Some designers suggest that reintroducing features like operable windows, thicker walls, or rooftop shade structures might help with indoor temperature control and lower energy consumption at the same time.</p>



<p>Studies indicate that extremely hot summers are occurring more <a href="https://jamanetwork.com/journals/jama/article-abstract/2822854" target="_blank" rel="noreferrer noopener">frequently</a>. Placing more emphasis on passive cooling could reduce the stress on power grids and keep people safer when the grid goes down.</p>



<h2 class="wp-block-heading" id="h-egypt-s-simple-but-clever-wind-catchers">Egypt’s simple but clever wind catchers</h2>



<p>In ancient Egypt, builders knew that porous materials such as mud brick would block intense sunlight and slow the movement of <a href="https://www.earth.com/news/mapping-2024s-record-heat-unveiling-earths-climate-danger-zones/" target="_blank" rel="noreferrer noopener">heat</a> indoors. Residents also slept outdoors on rooftops at night, taking advantage of the cooler air.&nbsp;</p>



<p>One striking invention was the <a href="https://www.egyptianarch.com/post/mulqaf-origin-language-design-and-development" target="_blank" rel="noreferrer noopener">mulqaf</a>, which used a tall opening to catch breezes and push them downward into a building. </p>



<p>That airflow let hot indoor air escape through other vents. This system is still used in parts of the Middle East, where tall <a href="https://www.archdaily.com/971216/what-is-a-traditional-windcatcher" target="_blank" rel="noreferrer noopener">wind catchers</a> provide fresh air without the need for electricity.</p>



<h2 class="wp-block-heading" id="h-secrets-from-the-ancient-puebloans">Secrets from the ancient Puebloans</h2>



<p>In the U.S. Southwest, the ancestral <a href="https://blog.nativehope.org/pueblo-native-americans-their-history-culture-and-traditions" target="_blank" rel="noreferrer noopener">Puebloans</a> built with mud brick and stone for many centuries. They placed dwellings close together and used smaller windows to limit excessive heat. Cliffs provided natural shade in places like <a href="https://greenpassivesolar.com/2010/04/mesa-verde-cliff-dwellings/" target="_blank" rel="noreferrer noopener">Mesa Verde</a>.&nbsp;</p>



<p>The layout took advantage of the sun’s angle to block the harsh summer rays and let in lower winter sunlight that warmed the interior.</p>



<p>These older methods still guide some modern builders who adopt adobe for its ability to moderate indoor temperatures.</p>



<h2 class="wp-block-heading" id="h-preserving-water-for-passive-cooling">Preserving water for passive cooling</h2>



<p>Many cities today send rainwater away as quickly as possible through storm drains. Old societies in arid regions did the opposite. </p>



<p>During the eighth century, the Muslim caliphates in northern Africa and southern Spain put a high value on every drop of rain. Their structures often had <a href="https://www.doi.org/10.1007/978-3-031-38028-0" target="_blank" rel="noreferrer noopener">systems</a> that channeled water from rooftops and courtyards into underground cisterns. That water cooled patios and irrigated gardens during scorching months.</p>



<p>In other parts of the world, societies like the Mayans in Mexico built huge <a href="https://link.springer.com/book/9783031577307" target="_blank" rel="noreferrer noopener">reservoirs</a> to store the wet-season rainfall. Modern <a href="https://www.sciencedirect.com/science/article/abs/pii/S0301479721002851?via%3Dihub" target="_blank" rel="noreferrer noopener">researchers</a> are exploring ways to adopt or improve rainwater harvesting, especially in places threatened by droughts or limited water supplies.</p>



<h2 class="wp-block-heading" id="h-adapting-passive-cooling-ideas-today">Adapting passive cooling ideas today</h2>



<p>Some architects believe that new designs should rely more on passive cooling and water collection. Orienting buildings in the northern hemisphere to take advantage of south-facing windows can help regulate <a href="https://www.earth.com/news/scorching-summer-of-2024-could-make-it-the-hottest-year-on-record/" target="_blank" rel="noreferrer noopener">heat</a> gain and loss (International Association of Certified Home Inspectors). </p>



<p>Rainwater captured onsite can be <a href="https://www.energy.gov/femp/rainwater-harvesting-systems-technology-review" target="_blank" rel="noreferrer noopener">reused</a> for landscape needs, thus reducing the burden on public water supplies.</p>



<p>Larger cities that hope to reduce their energy usage and keep people safe during emergencies could integrate these techniques into upcoming developments. Some methods might look old-fashioned compared to modern high-rises.&nbsp;</p>



<p>Yet people who live in the world’s driest and hottest places have been testing these approaches for a long time, and their successes can offer strong guidance.</p>



<h2 class="wp-block-heading" id="h-moving-forward-with-less-power-dependence">Moving forward with less power dependence</h2>



<p>There is a growing call to learn from strategies that rely on local resources. Converting entire cities will take effort, but these ideas do not belong in the distant past.&nbsp;</p>



<p>There is a need to reconsider glassy towers and single-purpose rooftops, especially as blackouts become an increasing risk in regions experiencing more frequent <a href="https://www.earth.com/news/climate-change-added-41-extra-days-of-dangerous-heat-in-2024/" target="_blank" rel="noreferrer noopener">heat waves</a>. </p>



<p>Historical knowledge of staying cool in extreme heat could provide valuable solutions for maintaining comfort when air conditioning is not an option.</p>



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



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Ancient buildings used passive cooling methods to reduce heat with out air conditioning

Our buildings usually remain comfortable during warm days because of...

Creatures,Of,The,Cambrian,Period,,Underwater,Scene,With,Anomalocaris,,Opabinia,

<p>A new investigation of tiny Cambrian shells has sparked excitement among experts who study how life changed when animals, both predators and prey, first expanded in number and variety. </p>



<p>The research, published in&nbsp;<em>Current Biology</em>, focuses on shell fragments from a small animal related to brachiopods.</p>



<p>These ancient remnants come from the ocean covering what is now South Australia. The shells are dotted with tiny perforations that some unknown marine creature must have made about 517 million years ago.</p>



<h2 class="wp-block-heading" id="h-cambrian-waters-and-shells-of-prey">Cambrian waters and shells of prey</h2>



<p>The <a href="https://news.stanford.edu/stories/2024/07/revisiting-the-cambrian-explosion-s-spark" target="_blank" rel="noreferrer noopener">Cambrian Explosion</a> was a phase in Earth’s history when many animal groups appeared in the fossil record in a short span of time. </p>



<p>It began roughly 541 million years ago, and it introduced an incredible diversity of organisms that possessed shells, spines, and other protective structures. Yet specialists have questioned how these defense features developed so quickly.&nbsp;</p>



<p>Did <a href="https://www.earth.com/news/largest-predator-prey-feast-ever-seen-in-the-ocean-enormous-quickly-altered-food-chain/" target="_blank" rel="noreferrer noopener">predators force prey</a> to reinforce their shells and adapt? Or did environmental changes spark widespread new traits in ocean life? </p>



<p>After puzzling over these questions for decades, experts are now pointing to new shell damage as possible proof of a rapid back-and-forth struggle between attackers and the creatures they targeted.</p>



<h2 class="wp-block-heading" id="h-shell-holes-reveal-predator-prey-interactions">Shell holes reveal predator-prey interactions</h2>



<p>This fresh look at the shells was spearheaded by <a href="https://www.researchgate.net/profile/Russell-Bicknell" target="_blank" rel="noreferrer noopener">Russell Bicknell</a> of the American Museum of Natural History. </p>



<p>Bicknell joined forces with colleagues from the <a href="https://www.une.edu/" target="_blank" rel="noreferrer noopener">University of New England</a> and <a href="https://www.mq.edu.au/" target="_blank" rel="noreferrer noopener">Macquarie University</a> to study the tiny armor of a Cambrian species called <a href="https://www.researchgate.net/publication/288292290_New_data_on_the_sclerite_morphology_of_the_tommotiid_species_Lapworthella_fasciculata" target="_blank" rel="noreferrer noopener"><em>Lapworthella fasciculata</em></a>.&nbsp;</p>



<p>The shell fragments ranged from a little larger than a grain of sand to something about the size of an apple seed. Researchers spotted more than 200 pieces with punctures that look as if a worm-like or snail-like <a href="https://www.earth.com/news/danger-zones-climate-change-is-altering-predator-prey-dynamics/" target="_blank" rel="noreferrer noopener">predator</a> produced them. </p>



<p>Over time, the shells appear to have become thicker and stronger, which suggests a quick answer by <em>L. fasciculata</em> to defend itself.</p>



<h2 class="wp-block-heading" id="h-evidence-reveals-attacks-on-shelled-prey">Evidence reveals attacks on shelled prey</h2>



<p>The team examined the fossil remains across different points in <a href="https://www.nationalgeographic.com/science/article/cambrian" target="_blank" rel="noreferrer noopener">Cambrian</a> history. They found that holes in the shells gradually rose in frequency while the shell walls became tougher in a short window.</p>



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/01/fossil-shells_Lapworthella-fasciculata_Cambrian_credit-Bicknell_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/01/fossil-shells_Lapworthella-fasciculata_Cambrian_credit-Bicknell_1s.webp" alt="Examples of Lapworthella fasciculata shells (under scanning electron microscope) from the Mernmerna Formation, Flinders Ranges, South Australia, showing holes made by a perforating predator. Scale bars represent 200 micrometers. Credit: R. Bicknell, et al (2025) Current Biology" class="wp-image-1956329"/></a><figcaption class="wp-element-caption"><em>Examples of Lapworthella fasciculata shells (under scanning electron microscope) from the Mernmerna Formation, Flinders Ranges, South Australia, showing holes made by a perforating predator. Scale bars represent 200 micrometers. Credit: R. Bicknell, et al (2025) Current Biology</em></figcaption></figure>



<p>“Predator-prey interactions are often touted as a major driver of the Cambrian explosion, especially with regard to the rapid increase in diversity and abundance of biomineralizing organisms at this time. Yet, there has been a paucity of empirical evidence showing that prey directly responded to predation, and vice versa,” said Bicknell.</p>



<h2 class="wp-block-heading" id="h-unexpected-speed-of-adaptation">Unexpected speed of adaptation</h2>



<p>Scientists have long suspected that early animals developed new defenses to keep up with evolving <a href="https://www.earth.com/news/frogfish-lure-their-prey-with-a-built-in-fishing-rod-and-bait/" target="_blank" rel="noreferrer noopener">predators</a>. This shift is frequently described as an arms race because each improvement from one side pushes the other side to respond.&nbsp;</p>



<p>The remarkable part is how swiftly <em>L. fasciculata</em> managed to boost its shell thickness. In a few generations, the predator must have increased its ability to break through stronger shells.&nbsp;</p>



<p>According to <a href="https://www.britannica.com/science/Paleozoic-Era" target="_blank" rel="noreferrer noopener">research</a> from 1987, early <a href="https://www.britannica.com/science/Paleozoic-Era">Paleozoic</a> life underwent several bursts of diversification, partly driven by escalating attacks in marine environments.</p>



<h2 class="wp-block-heading" id="h-tiny-shells-big-implications">Tiny shells, big implications</h2>



<p>The tiny shells open a window into the daily struggles of creatures that once lived in shallow seas filled with new forms of life. </p>



<p>These findings add weight to the idea that confrontation between small <a href="https://www.earth.com/news/the-octopus-has-mastered-the-art-of-multispecies-hunting/" target="_blank" rel="noreferrer noopener">predators</a> and their prey influenced the rapid spread of protective traits, such as tougher shells, in the early Cambrian.&nbsp;</p>



<p>A thickened shell could have meant the difference between living and becoming a snack. Some scientists propose that these predator-prey interactions may have shaped early marine communities more than previously assumed.</p>



<h2 class="wp-block-heading" id="h-filling-gaps-in-the-fossil-record">Filling gaps in the fossil record</h2>



<p>Fossils from the Cambrian are not always easy to interpret. </p>



<p>Soft-bodied creatures rarely fossilize well, and skeletal fragments often appear in fragments scattered through sedimentary rock. Many experts have struggled to figure out exactly which predators might have roamed these waters.&nbsp;</p>



<p>The punctured shells from <em>L. fasciculata</em> provide valuable clues because they are preserved well enough to show unmistakable signs of drilling or piercing. </p>



<p>These marks are a real boost to understanding how shells and predatory tools advanced in lockstep.</p>



<h2 class="wp-block-heading" id="h-why-it-matters-for-today-s-shelled-preys">Why it matters for today’s shelled preys</h2>



<p>Shell protection still matters in modern oceans, from clams to snails. When researchers look at how Cambrian animals beefed up their shells, they see patterns that may match modern dynamics. </p>



<p>Crabs, for instance, often feed on shelled prey, and those prey can shift their own growth strategies in response.&nbsp;</p>



<p>Looking at these ancient shells confirms that this tug-of-war between attacker and defender is nothing new. While more discoveries are needed, the takeaway is that even half a billion years ago, survival hinged on how well an organism handled the never-ending threat of becoming someone else’s lunch.</p>



<h2 class="wp-block-heading" id="h-connections-to-broader-evolutionary-questions">Connections to broader evolutionary questions</h2>



<p>Fossil shells tell us that the Cambrian Explosion’s rapid spread of animal life involved a tense duel between those doing the hunting and those trying to avoid it. </p>



<p>This new research highlights that predation is more than a violent encounter; it is a potent force pushing creatures to adapt in surprising ways.&nbsp;</p>



<p>Scientists will likely hunt for similar evidence in other early animal groups. Future work may close gaps in our knowledge of who attacked whom in those ancient seas and how quickly the defenders responded.</p>



<p>The study is published in the journal <em><a href="https://www.sciencedirect.com/science/article/abs/pii/S0960982224016476" target="_blank" rel="noreferrer noopener">Current Biology</a>.</em></p>



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



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Shell fossils reveal ancient predator-prey battle 517 million years ago

A new investigation of tiny Cambrian shells has sparked excitement...

<p>The ocean, which covers 70% of Earth’s surface, is reaching unprecedented high temperatures - not just at the surface but throughout the upper 2,000 meters (6,561 feet).</p>



<p>A new study led by Lijing Cheng, a professor in the <a href="http://english.iap.cas.cn/" target="_blank" rel="noreferrer noopener">Institute of Atmospheric Physics</a> at the Chinese Academy of Sciences, brings this alarming fact into sharp focus.</p>



<p>“The broken records in the ocean have become a broken record,”&nbsp;said Professor Cheng, who led a research team of 54 scientists from seven countries.</p>



<p>The research highlights the critical role ocean warming plays in shaping life on Earth and the climate’s future trajectory.</p>



<h2 class="wp-block-heading" id="h-ocean-s-role-in-climate-change">Ocean's role in climate change </h2>



<p>The ocean plays a critical role in Earth's climate system by acting as its primary heat reservoir. It absorbs 90% of the <a href="https://www.earth.com/news/2024-confirmed-as-earths-hottest-year-in-recorded-history/" target="_blank" rel="noreferrer noopener">excess heat generated by global warming</a>, helping to regulate global weather patterns. </p>



<p>This regulation occurs as the ocean transfers heat and moisture into the atmosphere, influencing everything from rainfall to storm intensity.</p>



<p>“To know what is happening to the climate, the answer is in the ocean,”&nbsp;explained Professor John Abraham from the <a href="https://www.stthomas.edu" target="_blank" rel="noreferrer noopener">University of St. Thomas</a>, emphasizing the ocean's central role in understanding climate changes.</p>



<h2 class="wp-block-heading" id="h-troubling-trend-in-the-ocean">Troubling trend in the ocean</h2>



<p>Research from three international teams confirmed a troubling trend: ocean heat content (OHC) reached record levels in 2024. The data shows that the upper layers of the ocean continue to absorb unprecedented amounts of heat.</p>



<p>From 2023 to 2024 alone, ocean heat content increased by a staggering 16 zettajoules (ZJ). To put this in perspective, this is roughly 140 times the total electricity generated by the entire world in 2023. </p>



<p>This dramatic rise emphasizes the steady and dangerous warming of the planet’s oceans.</p>



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



<p>Ongoing ocean warming has profound <a href="https://www.earth.com/news/ocean-warming-is-subtly-changing-the-tides/" target="_blank" rel="noreferrer noopener">consequences for weather</a>, ecosystems, and human life. </p>



<p>Regional variations in warming highlight areas such as the Atlantic, Mediterranean, and mid-latitude Southern Ocean, where temperatures are rising rapidly. Polar regions are also absorbing significant heat, exacerbating ice melt and global sea level rise.</p>



<p>Warmer ocean waters amplify extreme weather by increasing atmospheric water vapor - a powerful greenhouse gas. This phenomenon intensifies storms, droughts, wildfires, and flooding events.</p>



<p>“The main way the ocean continues to influence the climate is through accompanying increases in water vapor in the atmosphere,”&nbsp;explained Dr. Kevin Trenberth from the <a href="https://ncar.ucar.edu" target="_blank" rel="noreferrer noopener">National Center for Atmospheric Research</a>. </p>



<p>The result is a vicious cycle of climate extremes, including hurricanes, typhoons, and record heatwaves.</p>



<h2 class="wp-block-heading" id="h-intensifying-impacts-of-ocean-warming">Intensifying impacts of ocean warming</h2>



<p>Over the past year, 104 countries experienced their hottest temperatures on record, highlighting the growing impact of <a href="https://www.earth.com/news/plankton-at-risk-global-warming-threatens-the-oceans-lifeline/" target="_blank" rel="noreferrer noopener">global warming</a>. </p>



<p>This rise in heat has fueled catastrophic weather events worldwide. Heatwaves, droughts, floods, and wildfires have caused devastation across regions including Africa, Asia, Europe, and the Americas. These events have inflicted widespread damage to communities, economies, and ecosystems.</p>



<p>In the United States, climate-related disasters have been particularly costly. Since 1980, such events have led to nearly $3 trillion in damages, illustrating the significant economic burden of a warming climate.</p>



<p>The rise in ocean surface temperatures plays a critical role in amplifying these impacts. </p>



<h2 class="wp-block-heading" id="h-dramatic-rise-in-ocean-warming">Dramatic rise in ocean warming </h2>



<p>Surface waters, where the ocean interacts with the atmosphere, transfer heat and moisture, fueling extreme weather events.</p>



<p>Since the 1950s, these temperatures have risen dramatically, with far-reaching consequences for marine ecosystems and coastal communities. </p>



<p>Warmer waters disrupt marine life, erode coastal habitats, and increase the frequency and intensity of storms, making the situation even more urgent.</p>



<h2 class="wp-block-heading" id="h-ocean-warming-warns-of-planetary-danger">Ocean warming warns of planetary danger</h2>



<p>Dr. Karina von Schuckmann from <a href="https://www.mercator-ocean.eu/en/" target="_blank" rel="noreferrer noopener">Mercator Ocean International</a> described the ocean as a sentinel for <a href="https://www.earth.com/news/2024-shatters-heat-records-earths-hottest-year-is-here/" target="_blank" rel="noreferrer noopener">planetary warming</a>.&nbsp;“The ocean is our sentinel for planetary warming, acting as the major sink of surplus heat,”&nbsp;she emphasized.</p>



<p>If immediate action to combat climate change is not taken, the consequences will grow increasingly severe. Rising costs, damages, and loss of life demand urgent mitigation efforts to slow warming and protect our planet's future.</p>



<p>The findings of the study serve as a critical reminder: addressing ocean warming is essential to safeguarding Earth’s climate and humanity's future.</p>



<p>The study is published in the journal <em><a href="https://link.springer.com/article/10.1007/s00376-025-4541-3" target="_blank" rel="noreferrer noopener">Advances in Atmospheric Sciences</a>.</em></p>



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Record ocean warming in 2024 is a warning for our planet

The ocean, which covers 70% of Earth’s surface, is reaching...

<p></p>
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<p><br />
<span style="font-weight: 400;">Today’s </span><b>Video of the Day</b><span style="font-weight: 400;"> comes from the </span><a href="https://www.acs.org/"><span style="font-weight: 400;">American Chemical Society’s</span></a> <i><span style="font-weight: 400;">Reactions </span></i><span style="font-weight: 400;">series and features a look at the magic of sushi.</span></p>
<p><span style="font-weight: 400;">You may think it’s just some raw <a href="https://www.earth.com/news/older-fish-disappearing/">fish</a> and rice, but did you know that some sushi chefs spend 7 years learning the art? Sushi actually started out as a means of preserving fresh fish as far back as 300 to 400 BCE. If the fish were packed with rice, they could spend a year fermenting, where the buildup of lactic acid would prevent harmful bacteria from growing. But that’s only just the beginning&#8230;</span></p>
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<p><i><span style="font-weight: 400;">By </span></i><a href="mailto:rarnold@earth.com"><i><span style="font-weight: 400;">Rory Arnold</span></i></a><i><span style="font-weight: 400;">, </span></i><a href="https://www.earth.com/staff"><i><span style="font-weight: 400;">Earth.com</span></i></a><i><span style="font-weight: 400;"> Staff Writer</span></i></p>
<p><i><span style="font-weight: 400;">Video Credit: </span></i><a href="https://www.acs.org/"><i><span style="font-weight: 400;">American Chemical Society</span></i></a></p>

The magic of sushi