Today's Image of the Day from NASA Earth Observatory features the Costa Atlántica Reserve stretching along the Atlantic coast in Argentina.



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



Image Credit: NASA Earth Observatory&nbsp;



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Costa Atlántica Reserve in Argentina

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

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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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Fiery eruption of Mount Etna captured from space

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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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Stellar nursery shines in the Perseus cloud

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

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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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

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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



Image Credit: NASA Earth Observatory



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Mount Nemrut: Ancient mysteries and natural marvels 

In many parts of the world, traditional landscapes once dominated by wild herbivores are undergoing dramatic changes.&nbsp;Livestock grazing has replaced native grazers, leading to shifts in soil composition, plant diversity, and the delicate balance of predator-prey interactions. 



These <a href="https://www.earth.com/news/grazing-animals-have-an-unexpected-role-in-climate-change/" target="_blank" rel="noreferrer noopener">transformations</a> are often subtle, unfolding over years, but their consequences can be far-reaching.



A long-term study in the Spiti valley of the Himalayas sheds light on how this shift is affecting ground-dwelling arthropods, including spiders, ticks, and mites. 



The findings reveal a concerning trend - spider populations are dwindling while disease-carrying organisms such as ticks and mites are thriving. 



These changes have direct implications for biodiversity, ecological stability, and even human health.



<h2 class="wp-block-heading" id="h-global-livestock-grazing-the-basics">Global livestock grazing - the basics</h2>



The expansion of livestock grazing areas has been reshaping landscapes around the world for decades. As global demand for meat and dairy products grows, ranchers and agribusinesses clear more land for cattle, sheep, and other grazing animals. 



In places like the <a href="https://www.earth.com/news/the-amazon-rainforest-is-approaching-widespread-collapse/" target="_blank" rel="noreferrer noopener">Amazon rainforest</a>, vast stretches of trees are cut down to create pastures, contributing to deforestation and habitat loss. 



Grasslands, savannas, and even arid regions are also being converted into grazing land, often at the cost of native ecosystems. 



Some regions are turning to regenerative grazing techniques, which involve rotating animals across different pastures to mimic natural grazing patterns and allow the land to recover. 



Others are exploring <a href="https://www.earth.com/news/increasing-plant-based-food-production-would-have-extremely-positive-impact/" target="_blank" rel="noreferrer noopener">plant-based</a> alternatives and lab-grown meat to reduce pressure on the planet. 



The challenge is balancing food production with environmental sustainability, and as global appetites grow, finding solutions becomes even more urgent.



While livestock farming plays a major role in feeding the world, its rapid expansion raises a multitude of concerns, many of which we will discuss in this article.



<h2 class="wp-block-heading" id="h-spiders-in-livestock-grazed-areas">Spiders in livestock-grazed areas</h2>



The researchers found that livestock-grazed areas had fewer spiders but more grasshoppers, ticks, and mites. <a href="https://www.earth.com/news/rethinking-arachnid-evolution-the-surprising-history-of-spiders/" target="_blank" rel="noreferrer noopener">Spiders</a> play a crucial role in maintaining ecological balance by controlling insect populations.



Study co-author Sumanta Bagchi is an associate professor at the Centre for Ecological Sciences (<a href="https://ces.iisc.ac.in" target="_blank" rel="noreferrer noopener">CES</a>), Indian Institute of Science (IISc).



“<a href="https://www.earth.com/news/save-a-spider-day-protecting-our-connection-with-nature/" target="_blank" rel="noreferrer noopener">Spiders</a> are predators; their ecological roles are similar to wolves, lions, and tigers. A low abundance of spiders can release grasshoppers from predator control, and lead to many downstream changes in an ecosystem. Together, these effects alter material and energy flow,” explained Bagchi.



<h2 class="wp-block-heading" id="h-replacing-wild-herbivores-with-livestock">Replacing wild herbivores with livestock</h2>



Bagchi and his team have studied livestock’s impact on Spiti valley <a href="https://www.earth.com/news/seaweed-supplements-reduce-methane-in-grazing-cattle/" target="_blank" rel="noreferrer noopener">ecosystems</a> for over 15 years. They note that wild herbivores like yak and ibex once thrived globally but are now confined to protected areas. Elsewhere, domesticated animals dominate.



For the study, the researchers tracked over 25,000 arthropods from 88 taxa, including spiders, ticks, mites, bees, wasps, and grasshoppers. 



They monitored fenced plots with either wild or domestic grazers and analyzed soil moisture, pH, and vegetation biomass.



<h2 class="wp-block-heading" id="h-disrupting-arthropod-habitats">Disrupting arthropod habitats</h2>



Shamik Roy, former PhD student at CES and co-first author, pointed out that arthropods have long-established ties with native <a href="https://www.earth.com/news/restored-grasslands-bring-more-peace-to-africa/" target="_blank" rel="noreferrer noopener">grazers</a>.



“Vegetation and soil biotic and abiotic variables are intertwined in complex ways that we are still unravelling. Arthropods heavily depend on them for food and home, an association developed over centuries with native grazers in the ecosystem,” noted Roy.



Replacing these grazers disrupts arthropod populations. The study found that spiders declined in livestock-grazed areas, while ticks and mites flourished. 



The reasons behind spider declines are unclear, but reduced prey availability and vegetation changes may contribute.



<h2 class="wp-block-heading" id="h-increasing-disease-carrying-arthropods">Increasing disease-carrying arthropods</h2>



Pronoy Baidya, former PhD student at CES and co-first author, highlights a concerning trend. 



“One of the most surprising observations was the massive difference in tick and mite abundance between native grazers and livestock,” Baidya said.



Eighty percent of cattle worldwide carry ticks, which poses risks to both animals and humans. “This is a major concern for zoonotic diseases and One Health,” said Baidya.



<h2 class="wp-block-heading" id="h-livestock-grazing-and-vegetation">Livestock grazing and vegetation</h2>



Livestock grazing affects vegetation structure and soil health in complex ways. The study revealed that areas with domestic grazers had different plant compositions compared to those with native herbivores. 



Changes in plant types influence arthropod diversity and alter food availability for different species.



Soil conditions, including moisture and pH levels, also shift under livestock grazing. These changes impact microbial communities, further influencing the ecosystem. 



Healthy soil supports diverse vegetation, which in turn sustains a balanced arthropod population.



<h2 class="wp-block-heading" id="h-conservation-and-land-management">Conservation and land management</h2>



To mitigate these effects, the researchers suggest reintroducing <a href="https://www.earth.com/news/grazing-succession-animal-herbivore-mass-migration-serengeti/" target="_blank" rel="noreferrer noopener">native</a> herbivores and monitoring vector-borne diseases. Conservation policies should focus on balancing livestock grazing and preserving ecosystems.



“Currently, most of the commons are rather mismanaged, allowing people from villages to unsustainably utilise these commons for their livelihoods, and in the process denying the local herbivores their grazing areas,” said Baidya.



“Our study will hopefully be an example which may nudge governments to take serious steps for freeing up the commons first and then starting proper ecological restoration of these lands.”



Restoring wild herbivores and managing grazing lands could help rebuild ecosystems and reduce disease risks. 



These changes require action to protect biodiversity and maintain ecological balance. Sustainable land-use practices and better management of grazing areas can prevent further ecological disruption.



The study is published in the journal <a href="https://esajournals.onlinelibrary.wiley.com/doi/10.1002/eap.3091" target="_blank" rel="noreferrer noopener">Ecological Applications</a>.



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Livestock grazing is changing soil, plants, and insect populations

In many parts of the world, traditional landscapes once dominated...

Most people think wrinkles, graying hair, and a few creaks in the knees define aging. Yet scientists have spent decades exploring whether these signs, along with genetic mutations, tell the whole truth about growing older.



Early research suggests that <a href="https://www.cdc.gov/genomics-and-health/epigenetics/index.html" target="_blank" rel="noreferrer noopener">epigenetics</a> might help us measure how our bodies grow older, but what actually pushes these epigenetic “clocks” forward has been heavily debated.



The answer may involve unexpected links between random genetic changes and the epigenetic patterns found in older cells, according to Dr. Steven Cummings from Sutter Health’s California Pacific Medical Center Research Institute.



<h2 class="wp-block-heading" id="h-do-mutations-control-biological-age">Do mutations control biological age?</h2>



Scientists once thought that DNA mutations were the main culprits behind the decline in health we see with age.



Previous research has shown that somatic mutations, which are genetic changes acquired over a lifetime, occur more often in older tissues. Other studies noted that not all aspects of <a href="https://www.earth.com/news/drinking-tea-every-day-proven-studies-to-delay-biological-aging-in-humans/" target="_blank" rel="noreferrer noopener">aging</a> could be blamed on these changes alone.



This curiosity set the stage for new research on the processes sitting “on top” of DNA, known as epigenetic changes. 



Epigenetic modifications do not alter the core DNA sequence. Instead, they shift the activity of genes, and appear to follow consistent patterns as people age. Scientists measure these patterns with tests called epigenetic clocks.



<h2 class="wp-block-heading" id="h-how-random-mutations-fit-in">How random mutations fit in</h2>



The recent study used tumor and noncancerous tissue samples from thousands of patients to see if they could track how mutations and epigenetic marks matched up. 



The researchers noticed a striking overlap. Once a random mutation appeared, surrounding CpG sites often showed significant shifts in a specific epigenetic mark called methylation.



The scientists found that mutated spots had a reduced level of methylation. When these changes showed up, many nearby spots either gained or lost methylation too.



Ultimately, the researchers found that the overall methylation patterns reliably tracked a person’s age, hinting at a tight bond between random genetic errors and the chemical marks that define <a href="https://pubmed.ncbi.nlm.nih.gov/36206857/" target="_blank" rel="noreferrer noopener">epigenetic clocks</a>.



<h2 class="wp-block-heading" id="h-do-mutations-speed-up-aging">Do mutations speed up aging?</h2>



“This is very clear evidence of a relationship,” said Dr. Cummings. He emphasized that the correlation between mutations and <a href="https://www.earth.com/news/scientists-discover-the-cellular-mortality-timer-that-dictates-aging/" target="_blank" rel="noreferrer noopener">epigenetic changes</a> leaves room for two big possibilities. One idea is that both changes are triggered by an unknown source of aging.&nbsp;



Another possibility is that somatic mutations gradually push these clocks forward. This would mean that reversing epigenetic changes may not solve the biggest problems associated with aging.



The researchers also noticed that once a cytosine base in DNA gains a methyl group, it becomes more likely to mutate. This can create a chain reaction in which each new mutation influences future epigenetic shifts. 



Scientists say more studies will help explain which event happens first, or if both swirl together in a complex cycle.



<h2 class="wp-block-heading" id="h-fresh-angles-on-health-and-disease">Fresh angles on health and disease</h2>



Epigenetic clocks have long been used to spot tissues that appear “older” or “younger” than expected for a given person’s chronological <a href="https://www.earth.com/news/aging-hotspot-found-in-the-brain-may-hold-the-key-to-longevity/" target="_blank" rel="noreferrer noopener">age</a>. 



These measurements often show up in discussions of early disease risk or overall lifespan. Such clocks may even prove valuable in predicting which treatments will work best for certain age-related conditions.



Still, experts warn that the actual drivers behind these epigenetic signals need more research. In some labs, investigators plan to create controlled mutations in cultured cells, then watch how epigenetic marks shift over time. 



Others hope to follow human subjects over the years, collecting samples at different intervals so that real aging patterns can be observed in action.



<h2 class="wp-block-heading" id="h-future-research-on-mutations-and-aging">Future research on mutations and aging</h2>



Researchers are also looking at diseases tied to heightened mutation rates. Such conditions might give extra clues about whether these random genetic changes truly lead to faster aging.



Scientists are curious whether preventing new mutations, improving DNA repair, or slowing epigenetic changes can significantly extend a healthy lifespan.



Although there is excitement in the scientific community, finding the exact mechanics behind aging is tricky. More data will help show if both the mutations and epigenetic marks merely act as signals of a deeper aging process.



As Dr. Cummings suggested, if mutations are the actual trigger, then resetting epigenetic clocks alone may not be enough to reduce certain age-related health risks.



<h2 class="wp-block-heading" id="h-balancing-hope-and-caution">Balancing hope and caution</h2>



For the average person, the concept of “biological <a href="https://www.earth.com/news/muscles-defy-aging-with-remarkable-resilience/" target="_blank" rel="noreferrer noopener">age</a>” might still feel like a puzzle. Researchers, however, see these new findings as a chance to broaden our understanding of everything that happens inside aging cells. 



Any further understanding of the basic mechanisms that are at play are going to ultimately help to advance the field.



By testing how cells respond to targeted epigenetic modifications, scientists hope to clarify whether adjusting these markers can deliver practical health benefits. Their findings, along with long-term observations of how mutations appear in various tissues, could be vital in refining current anti-aging tools.



The study is published in the journal <a href="https://www.nature.com/articles/s43587-024-00794-x" target="_blank" rel="noreferrer noopener">Nature Aging</a>.



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Causes of biological aging are much different than we thought

Most people think wrinkles, graying hair, and a few creaks...

A small weekly dose of moderate to vigorous exercise - just 35 minutes - could significantly lower an older adult’s chances of developing dementia, according to a new study.



Led by the <a href="https://publichealth.jhu.edu/" target="_blank" rel="noreferrer noopener">Johns Hopkins Bloomberg School of Public Health</a>, the research found that even older people who are frail appear to benefit from this low level of activity. 



The results suggest that physical activity is an accessible way for many seniors to protect their cognitive health.



<h2 class="wp-block-heading" id="h-reducing-dementia-risk-with-exercise">Reducing dementia risk with exercise</h2>



The researchers analyzed data from nearly 90,000 adults living in the United Kingdom. Each participant wore a wrist-based device that recorded their physical activity for a week, and they were then followed over an average period of 4.4 years to see who developed <a href="https://www.earth.com/news/risk-of-dementia-is-much-higher-than-previously-thought/" target="_blank" rel="noreferrer noopener">dementia</a>.



The findings were striking: compared to participants who recorded zero moderate-to-vigorous physical activity, those who achieved as little as 35 minutes per week had a 41% reduced risk of being diagnosed with dementia.&nbsp;



Greater amounts of physical activity correlated with even lower risks: 60% lower for 35–69.9 minutes, 63% lower for 70–139.9 minutes, and 69% lower for 140 or more minutes.



Study lead author Amal Wanigatunga is an assistant professor of epidemiology at the Bloomberg School.&nbsp;



“Our findings suggest that increasing <a href="https://www.earth.com/news/fitness-focused-medicine-physical-activity-reduces-chronic-disease-risk/" target="_blank" rel="noreferrer noopener">physical activity</a>, even as little as five minutes per day, can reduce dementia risk in older adults,” explained Wanigatunga.



“This adds to a growing body of evidence that some exercise is better than nothing, especially with regard to an aging-related disorder that affects the brain that currently has no cure.”



<h2 class="wp-block-heading" id="h-dementia-risks-and-the-role-of-exercise">Dementia risks and the role of exercise</h2>



Dementia, often caused by <a href="https://www.earth.com/news/alzheimers-disease-attacks-the-brain-in-two-separate-phases/" target="_blank" rel="noreferrer noopener">Alzheimer’s</a> disease, is highly prevalent among older populations - about seven million individuals in the United States alone. One in three people over the age of 85 is affected, and the numbers are expected to rise as the population ages.



Scientists have long studied how lifestyle factors might reduce dementia risk, pointing to better management of cholesterol, blood pressure, and blood sugar, alongside increased physical activity. However, it has been less clear how small or large an exercise dose should be to help protect the brain.&nbsp;



Current guidelines in both the U.S. and the U.K. recommend 150 minutes of moderate-intensity exercise each week (roughly 20 minutes per day). While beneficial, that target may intimidate some older adults - particularly those who are frail or limited by mobility issues.



The new data suggest that even a fraction of the recommended time could deliver meaningful protection against dementia. The researchers took special note of participants who met criteria for “<a href="https://www.earth.com/news/flavonol-rich-foods-reduce-the-risk-of-developing-frailty/" target="_blank" rel="noreferrer noopener">frailty</a>” or “pre-frailty” and found that low volumes of exercise were associated with lower dementia risk in those groups as well. 



“This suggests that even frail or nearly frail older adults might be able to reduce their dementia risk through low-dose exercise,” Wanigatunga said.



<h2 class="wp-block-heading" id="h-study-limitations-and-future-directions">Study limitations and future directions</h2>



Because this study was not a clinical trial, it cannot conclusively prove that exercise itself prevents dementia.&nbsp;



To reduce the possibility of reverse causation - i.e., that undiagnosed dementia caused people to move less - the team repeated their analysis after excluding dementia diagnoses that occurred in the first two years of follow-up.&nbsp;



The protective link between activity and lower dementia risk remained strong, adding credibility to the idea that movement itself helps preserve cognitive function.



The authors call for additional research to confirm these results through randomized clinical trials. They see “low-dose” exercise as a potentially critical step for seniors - especially those who struggle to meet higher targets.&nbsp;



By encouraging just a few minutes per day and building up gradually, more people might achieve at least 35 minutes of moderate or vigorous activity per week and thus lower their odds of cognitive decline.



<h2 class="wp-block-heading" id="h-dementia-risk-in-older-adults">Dementia risk in older adults</h2>



These findings are particularly relevant given the growing number of older adults worldwide and the significant impact dementia can have on individuals, families, and healthcare systems.&nbsp;



Although some may find it difficult to dedicate 20 minutes each day to exercise, the study demonstrates that even small increments of movement - brief walks, light gardening, or gentle workouts - can add up to better brain health.



For now, the message is clear: a little bit of exercise is better than none at all, and that small effort might yield substantial rewards.&nbsp;



By broadening access to physical activity for older adults - especially those who feel constrained by frailty - health practitioners could take an important step toward reducing the burden of dementia in an aging society.



The study is published in the <a href="https://www.jamda.com/article/S1525-8610(24)00879-X/abstract" target="_blank" rel="noreferrer noopener">Journal of the American Medical Directors Association</a>.



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Small doses of exercise can greatly reduce dementia risk

A small weekly dose of moderate to vigorous exercise -...

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Today’s Video of the Day comes thanks to the <a href="https://www.acs.org/">American Chemical Society</a> and features a look at a new synthetic material that has been created to shed like a <a href="https://www.earth.com/animals/mandarin-ratsnake-elaphe-mandarina/">snake</a> when scratched. 
The waterproof material could be used for a wide variety of products, including self-cleaning windows and rain gear. When water touches it, it forms round beads and falls off the edges.
&#8212;
By <a href="mailto:rarnold@earth.com">Rory Arnold</a>, <a href="https://www.earth.com/staff">Earth.com</a>
Source: <a href="https://www.youtube.com/watch?v=PNQnROHgotE&amp;feature=youtu.be">American Chemical Society</a>

New waterproof material sheds like a snake when scratched

News coming your way