<p>Today's <strong>Image of the Day</strong> from <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA Earth Observatory</a> features Ruang, a small volcanic island in North Sulawesi, Indonesia. The tranquil environment of Ruang was shattered by a powerful volcanic eruption on the night of April 16, 2024.</p>



<p>This event has left the island's 800 residents grappling with its devastating aftermath, while scientists are assessing its potential global effects.</p>



<h2 class="wp-block-heading" id="h-a-violent-awakening-on-ruang">A violent awakening on Ruang</h2>



<p>Ruang, located in the Sangihe Islands arc, is known for its long history of <a href="https://www.earth.com/news/volcanic-eruptions-play-an-overlooked-role-in-earths-climate/" target="_blank" rel="noreferrer noopener">volcanic activity</a>, but the intensity of the latest eruption has been particularly alarming. The <a href="https://www.earth.com/news/explosive-volcanic-eruption-triggered-an-hours-long-thunderstorm/" target="_blank" rel="noreferrer noopener">eruption</a> produced explosive discharges, sending vast plumes of ash and gas soaring into the stratosphere. The force of nature transformed lush greenery into a gray wasteland.</p>



<p>“Late on April 16, 2024, the mountain roared to life, unleashing a series of explosive eruptions that, at times, sent plumes of ash and gas billowing high into the stratosphere. The eruption also bombarded the island with tephra, small pebbles of lapilli, and fine shards of pulverized rock called ash,” said NASA.</p>



<h2 class="wp-block-heading" id="h-extensive-damage-and-humanitarian-efforts">Extensive damage and humanitarian efforts</h2>



<p>The eruption's immediate impact was severe, with settlements on the north side of Ruang and Laingpatehi village experiencing extensive damage due to volcanic debris.&nbsp;</p>



<p>More than 500 houses were destroyed or severely damaged, according to Indonesia’s disaster management agency, Badan Nasional Penanggulangan Bencana (BNPB). The heavy ashfall also impacted local agriculture, damaging crops and farms.&nbsp;</p>



<p>In response to the crisis, the Sam Ratulangi International Airport in nearby Manado was temporarily closed, disrupting travel and causing widespread flight cancellations. It was not until April 22 that the airport could reopen, following significant cleanup efforts and a decrease in the volcanic threat level.</p>



<h2 class="wp-block-heading" id="h-scientific-analysis-and-global-concerns">Scientific analysis and global concerns</h2>



<p>The eruption has attracted significant scientific interest due to the vast quantities of ash and sulfur dioxide it emitted. Atmospheric scientist Ghassan Taha from NASA’s Goddard Space Flight Center noted, "We expect to see aerosol particles circulating in the stratosphere for weeks, if not months." This observation is critical as particles reaching this altitude can have extensive, albeit temporary, effects on global climate patterns.</p>



<p>Volcanologist Simon Carn from Michigan Technological University reported that the eruption released between 0.3 to 0.5 teragrams of sulfur dioxide on April 17 and 18. These levels, while substantial, fall below the threshold generally required to affect global temperatures significantly.&nbsp;</p>



<p>For context, the 1991 Mount Pinatubo eruption, which had a pronounced cooling effect on the Earth's climate, released approximately 20 teragrams of sulfur dioxide.</p>



<h2 class="wp-block-heading" id="h-preparedness-and-future-risks">Preparedness and future risks</h2>



<p>In light of Ruang's active volcanic history and the potential for further eruptions, local authorities remain vigilant. The risk of lahars and tsunamis prompted immediate evacuations and multiple tsunami warnings, though, fortunately, no substantial tsunamis have occurred thus far. Over 16,000 residents have been evacuated from the most vulnerable areas, a move that has likely prevented any fatalities or serious injuries.</p>



<p>The 2024 <a href="https://www.earth.com/news/underwater-volcanic-eruptions-are-more-harmful-than-previously-believed/" target="_blank" rel="noreferrer noopener">eruption</a> of Ruang is a stark reminder of the powerful and often unpredictable nature of volcanic islands. While the local and immediate impacts are devastating, the eruption also offers valuable data for scientists studying the broader implications of such natural events on atmospheric conditions and climate. </p>



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



<p>The population on Ruang is small, with residents primarily engaged in subsistence fishing and agriculture, which is typical of remote Indonesian islands. The island's terrain and soil fertility, influenced by volcanic ash, may support the cultivation of certain crops that are adapted to such conditions.</p>



<p>The Ruang volcano rises to about 725 meters above sea level, making it a prominent feature in the region. This area is part of the volcanic arc that includes numerous volcanoes produced by the subduction of the oceanic plate under the continental margin.</p>



<p>The active stratovolcano has had several recorded eruptions in history, with significant activity occurring in 1871, 1873, and 2002.&nbsp;</p>



<p>The image was captured by the Operational Land Imager (OLI) on April 20, 2024.</p>



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



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Ruang volcano eruption has devastated the tranquil island

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

<p>Today's <strong>Image of the Day</strong> from <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA Earth Observatory</a> features the Bermejo River and the Río Grande de Tarija, which flow through Argentina and Bolivia in South America. The photograph was captured by an astronaut onboard the International Space Station.</p>



<h2 class="wp-block-heading" id="h-meandering-rivers">Meandering rivers</h2>



<p>“The meandering rivers in this image are sourced in the Andes Mountains and generally flow southeast through valleys in the foothills - the region between the high mountains and plains. The Iruya River deposits particles of silt and clay as it flows into the valley centered in this image,” said NASA.</p>



<p>“Visible indications of the rivers’ shifting channels include river islands, point bars (on the inside curve of streams), and several meander scars. Such scars form when a river gets cut off from the main flow and fills in with sediment, soil, and vegetation.”</p>



<p>“Sediment from the adjacent highlands filled valleys that were formed by tectonic forces driving uplift of the Andes. These deposits are subsequently carried by rivers, such as the Iruya, along with new sediment to form the light-toned braided channels and the adjacent darker-toned floodplains. Nutrient-rich floodplain soils provide fertile ground for agricultural fields.”</p>



<h2 class="wp-block-heading" id="h-bermejo-river">Bermejo River</h2>



<p>The Bermejo River originates in the Bolivian <a href="https://www.earth.com/news/biodiversity-hotspots-are-shrinking-in-the-andes-mountains/" target="_blank" rel="noreferrer noopener">Andes</a> and flows into Argentina. It plays a crucial role in the geographical and ecological landscape of the region. The river's course is characterized by its meandering path through the Gran Chaco plain, making it a significant river in the region's hydrological system.</p>



<h3 class="wp-block-heading" id="h-economic-importance">Economic importance</h3>



<p>The Bermejo River is vital for agriculture, providing essential water resources for irrigation. It also has potential for hydroelectric power generation.</p>



<h3 class="wp-block-heading" id="h-biodiversity-nbsp">Biodiversity&nbsp;</h3>



<p>The diverse habitats created by the Bermejo River, including its riverbanks, floodplains, and adjacent forests, support rich biodiversity. However, the wildlife in this region faces threats from habitat destruction, pollution, and climate change, making conservation efforts critical for their survival.</p>



<p><a href="https://www.earth.com/news/jaguars-in-the-amazon-are-threatened-by-climate-extremes/" target="_blank" rel="noreferrer noopener">Jaguars</a> are the apex predators of this region, and are occasionally spotted along the riverbanks, where they hunt. Large, herbivorous mammals called tapirs are found in the forests around the Bermejo River. They often visit the river to drink and cool off.</p>



<p>Capibaras, the world’s largest rodents, are commonly found in the wetlands and along the river edges.</p>



<p>The tallest flying bird found in South and Central America, jabirus can often be seen in wetlands along the Bermejo River. Toco toucans, known for their colorful bills, can be found in the forested areas near the river.</p>



<h2 class="wp-block-heading" id="h-rio-grande-de-tarija">Río Grande de Tarija</h2>



<p>The Río Grande de Tarija, also known in its lower stretches as the Guadalquivir, flows primarily within Bolivia. It is a critical watercourse in the Tarija Department, contributing significantly to the region's agriculture and livelihoods.</p>



<h3 class="wp-block-heading" id="h-economic-importance-0">Economic importance</h3>



<p>This river is essential for irrigation, supporting a variety of crops and contributing to the local economy. The surrounding lands are fertile and productive, thanks to the river's water.</p>



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



<p>Similar to other rivers, the Río Grande de Tarija faces challenges such as water management issues, <a href="https://www.earth.com/news/predicting-the-effects-of-pollutants-on-river-ecosystems/" target="_blank" rel="noreferrer noopener">pollution</a>, and the impacts of climate change on its flow and health.</p>



<h3 class="wp-block-heading" id="h-wildlife-in-bolivian-rivers">Wildlife in Bolivian rivers</h3>



<p>River basins in Bolivia are home to a wide range of bird species, including various species of herons, egrets, kingfishers, and perhaps even some rarer species like the wattled jacana or the sunbittern. The diverse birdlife is attracted to the abundance of fish and the relatively untouched natural habitats along the river.</p>



<p>The Characidae family includes many fish species that are commonly found in South American rivers, such as tetras. They are known for their diversity and are a key part of the river's ecosystem, serving as both <a href="https://www.earth.com/news/diving-to-extremes-predatory-fish-frequent-the-oceans-twilight-zone/" target="_blank" rel="noreferrer noopener">predator</a> and prey.</p>



<p>Cichlids are another diverse group of fish that can be found in South American rivers. They are appreciated by aquarium enthusiasts worldwide and play significant roles in their ecosystems as both predators and herbivores.</p>



<p>The rivers of Bolivia are also home to various catfish species, which are well adapted to life in muddy and turbulent waters. These include the armored catfish, which are often found clinging to rocks and logs.</p>



<p>Image Credit: NASA Earth Observatory/ ISS Crew Earth Observations Facility/ Earth Science and Remote Sensing Unit, Johnson Space Center</p>



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

The Río Grande de Tarija and Bermejo River in South America

<p>Today's <strong>Image of the Day</strong> from <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA Earth Observatory</a> features the delta of the Ebro River on the northeast coast of Spain, captured by the Copernicus Sentinel-2 mission.</p>



<h2 class="wp-block-heading" id="h-ebro-river">Ebro River</h2>



<p>“Stretching across 910 km of northern Spain, the Ebro River is the second-longest river in the Iberian Peninsula. In the image, it can be seen as a green line winding its way through the peninsula before flowing into the Mediterranean, shaping the Ebro Delta,” noted ESA.</p>



<p>“The Ebro River discharges more water into the sea than any other river in Spain. As suspended sediment flows from the river’s mouth, it tints the coastal waters with a turquoise hue.”</p>



<h2 class="wp-block-heading" id="h-ebro-delta">Ebro Delta</h2>



<p>The Ebro Delta is one of the largest <a href="https://www.earth.com/news/wetland-methane-emissions-have-surged-at-high-latitudes/">wetland areas</a> in the western Mediterranean region. The river's basin is the largest in Spain, covering about 85,000 square kilometers.</p>



<h2 class="wp-block-heading" id="h-historical-significance-nbsp">Historical significance&nbsp;</h2>



<p>Historically, the Ebro River has been significant in numerous battles, including the famous Battle of the Ebro during the Spanish Civil War, which was one of the war's longest and deadliest conflicts.&nbsp;</p>



<h2 class="wp-block-heading" id="h-economic-significance-nbsp">Economic significance&nbsp;</h2>



<p>Economically, the Ebro plays a crucial role in agriculture, particularly in regions like La Rioja and Navarre, which are known for their vineyards. Additionally, the river supports various industries and hydroelectric power generation.</p>



<h2 class="wp-block-heading" id="h-ecological-significance">Ecological significance</h2>



<p>The Ebro Delta is ecologically rich, providing habitat for diverse bird species. It is also a vital area for rice cultivation in Spain.&nbsp;</p>



<h3 class="wp-block-heading" id="h-nature-reserve">Nature reserve</h3>



<p>“Most of the delta comprises the Ebro Delta Nature Reserve. With its protected wetlands, beaches, marshes, salt pans and estuaries, this reserve provides a natural habitat for numerous migratory birds and waterfowl,” said ESA.</p>



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



<p>The river and its delta face environmental challenges such as pollution, water extraction for irrigation, and the impacts of <a href="https://www.earth.com/news/climate-change-may-have-altered-river-flow-worldwide/">climate change</a>, which threaten its ecosystem and the sustainability of its water resources.</p>



<h2 class="wp-block-heading" id="h-the-northeast-coast-of-spain">The northeast coast of Spain</h2>



<p>The northeast coast of Spain is a vibrant and diverse region, characterized by its rich history, unique culture, and stunning landscapes. </p>



<p>It includes the autonomous communities of Catalonia, which features the dynamic city of Barcelona, and part of the Valencian Community. This area is also part of what is known as the Costa Brava, which stretches from the town of Blanes up to the French border.</p>



<h3 class="wp-block-heading" id="h-geography">Geography</h3>



<p>The <a href="https://www.earth.com/news/human-activity-impacts-97-percent-of-the-worlds-coastline/">coastline</a> is renowned for its rugged beauty, with rocky cliffs, secluded coves, and small beaches. The interior regions feature mountains such as the Pyrenees, which offer skiing in winter and hiking in the summer.</p>



<h3 class="wp-block-heading" id="h-cultural-heritage">Cultural heritage</h3>



<p>The area has a strong cultural identity, particularly in Catalonia, where there is a significant movement for independence. The Catalan language is widely spoken alongside Spanish. The region is also known for its festivals, architecture (notably the works of Antoni Gaudí in Barcelona), and traditional dances like the Sardana.</p>



<h3 class="wp-block-heading" id="h-cuisine">Cuisine</h3>



<p>The cuisine is a delightful mix of fresh seafood from the Mediterranean, traditional Catalan dishes like "pa amb tomàquet" (bread with tomato), and rice dishes such as paella in the Valencian region. The area is also famous for its wines, including the sparkling wine Cava.</p>



<h3 class="wp-block-heading" id="h-tourism">Tourism</h3>



<p>The northeast coast attracts millions of tourists each year due to its beautiful beaches, historical sites, and vibrant cities. Barcelona, in particular, is a major tourist destination with attractions like the Sagrada Familia, Park Güell, and the bustling La Rambla.</p>



<h3 class="wp-block-heading" id="h-economy">Economy</h3>



<p>The economy of the northeast coast is one of the most dynamic in Spain, with Barcelona serving as a major hub for trade, education, entertainment, and technology.</p>



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



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The Ebro River on the northeast coast of Spain

<p>Today's <strong>Image of the Day</strong> from <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA Earth Observatory</a> features the United Arab Emirates, where a slow-moving storm system dumped more than a year's worth of rainfall in just a few hours. </p>



<p>“The UAE’s National Center for Meteorology reported that eastern parts of the country measured up to 250 millimeters (10 inches) of rain in less than 24 hours. UAE, known for its dry desert climate, receives only about 140 to 200 millimeters (5.5 to 8 inches) of rainfall per year,” said NASA.</p>



<p>“Dubai International Airport recorded 119 millimeters on April 16, which is 1.5 times its typical annual rainfall. The deluge temporarily halted flights at the airport, which is among the world’s busiest for international travel.”</p>



<h2 class="wp-block-heading" id="h-heaviest-rainfall-on-record-in-the-united-arab-emirates-nbsp">Heaviest rainfall on record in the United Arab Emirates&nbsp;</h2>



<p>Authorities noted that this was the heaviest <a href="https://www.earth.com/news/record-heat-fueled-unexpected-and-deadly-storms-in-2023/" target="_blank" rel="noreferrer noopener">rainfall</a> on record in the United Arab Emirates. The news agency WAM called it a historic weather event that surpassed “anything documented since the start of data collection in 1949.”&nbsp;</p>



<p>“Heavy rain triggered flash flooding across eastern parts of the country, inundating roads and disrupting transportation,” said NASA. “The system first hit Oman on April 14 and continued to batter the UAE through most of the day on April 16.”&nbsp;</p>



<p>At least 18 people were killed in the <a href="https://www.earth.com/news/heavy-rainfall-events-in-the-northeast-are-set-to-increase-by-over-50-percent/" target="_blank" rel="noreferrer noopener">heavy rains</a> in Oman, including ten children that were swept away in a vehicle with one adult, according to a statement from the country’s National Committee for Emergency Management.&nbsp;</p>



<h2 class="wp-block-heading" id="h-strong-low-pressure-system">Strong low-pressure system</h2>



<p>Michael Mann, a climate scientist at the University of Pennsylvania, noted that three low-pressure systems formed a train of <a href="https://www.earth.com/news/thunderstorms-are-becoming-more-intense-due-to-climate-change/" target="_blank" rel="noreferrer noopener">storms</a> slowly moving along the jet stream - the river of air that moves weather systems - toward the Persian Gulf.&nbsp;</p>



<p>“The strong low-pressure system delivered multiple rounds of high winds and heavy rain to the northern and eastern parts of the country,” said NASA. “Some areas remained flooded on April 19, when Landsat 9 passed over the region for the first time since the storms.”&nbsp;</p>



<p>Climate experts attribute such extreme weather events to <a href="https://www.earth.com/news/limiting-global-warming-to-1-5-degrees-celsius-would-save-billions-of-lives/" target="_blank" rel="noreferrer noopener">global warming</a>. According to a report from Reuters, researchers anticipate that climate change will lead to hotter temperatures, increased humidity, and a greater risk of <a href="https://www.earth.com/news/seeking-ways-to-prevent-flooding-caused-by-climate-change/" target="_blank" rel="noreferrer noopener">flooding</a> in parts of the Gulf region. “Countries like the UAE where there is a lack of drainage infrastructure to cope with heavy rains can suffer the most,” the report stated.&nbsp;</p>



<h2 class="wp-block-heading" id="h-more-about-the-united-arab-emirates-nbsp">More about the United Arab Emirates&nbsp;</h2>



<p>The United Arab Emirates (UAE) is a federation of seven emirates located on the eastern side of the Arabian Peninsula. It borders Oman and Saudi Arabia, and has maritime borders with Iran and Qatar in the Persian Gulf. Established as a federation in 1971, the UAE has rapidly developed into one of the most modern and wealthy nations in the world, largely thanks to its vast oil and natural gas reserves.</p>



<p>Abu Dhabi serves as the capital and is the largest emirate, both in terms of land area and economy, largely because it holds the majority of the UAE's oil reserves. Dubai is the most populous city and is renowned globally for its spectacular skyscrapers, including the Burj Khalifa, the tallest building in the world, as well as its bustling ports, and vibrant tourism and shopping sectors.</p>



<p>The UAE has a diverse and multicultural society with a significant expatriate population, drawn by business opportunities and the tax-free living in many sectors. The official language is Arabic, though English is widely spoken, especially in business and educational settings.</p>



<p>Politically, the UAE is a federal absolute monarchy. It is governed by a Supreme Council of Rulers made up of the seven emirs, who appoint the prime minister and the cabinet. The country has made significant strides in terms of infrastructure and healthcare, and it continues to invest heavily in various sectors including renewable energy, education, and technology.</p>



<p>Culturally, the UAE balances its rapid modernization with a strong commitment to traditional Arab culture. The heritage of the desert Bedouin lifestyle is celebrated with falconry, camel racing, and traditional dance remaining integral to its cultural festivities. The nation is also a major hub for international arts and sports events, enhancing its global profile and cultural footprint.</p>



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



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Storms dumped record rainfall in the United Arab Emirates

<p>Today's <strong>Image of the Day</strong> from the <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">European Space Agency </a>features the barred spiral galaxy NGC 3783, which is located about 130 million light-years away in the constellation Centaurus. NGC 3783 is also the most prominent of a galaxy group (by the same name) that contains 47 <a href="https://www.earth.com/news/james-webb-captures-galaxies-that-are-too-old-to-exist/" target="_blank" rel="noreferrer noopener">galaxies</a>. </p>



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



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



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



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



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



<p>HD 101274 is part of the NGC 3766 cluster, which is sometimes referred to as the Pearl Cluster, an open cluster known for its richness in bright stars and its relatively young age.</p>



<p>HD 101274 is categorized as a blue giant star, characterized by its high temperature and luminosity. Blue giants are massive stars that have left the main sequence phase of stellar evolution and are burning helium or heavier elements in their cores. These stars are known for their short lifespans relative to smaller stars due to their rapid consumption of nuclear fuel.</p>



<p><a href="https://www.earth.com/news/dark-stars-scientists-discover-a-new-type-of-star-powered-by-dark-matter/" target="_blank" rel="noreferrer noopener">Stars</a> like HD 101274 are important for astronomers because they help in studying the properties of stellar populations in clusters and the dynamics of stellar evolution in different environments. The spectral and photometric observations of such stars can provide valuable insights into the characteristics of their atmospheres, internal structures, and the processes occurring within and around them.</p>



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



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



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



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



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



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



<p>The NGC 3783 group is part of the larger Hydra-Centaurus Supercluster, which itself is a massive collection of galaxies and galaxy clusters located primarily in the constellations of Hydra and Centaurus.</p>



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



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



<p>Image Credit: ESA/Hubble &amp; NASA</p>



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The luminous galaxy NGC 3783 and a blue giant star

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

<p>Today's <strong>Image of the Day</strong> from <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA Earth Observatory</a> features sediment swirling in the Gulf of Alaska on December 29, 2023.</p>



<p>"After an unusually snowy start to winter, southern Alaska’s coastline remained under a blanket of white in late December," said NASA.</p>



<p>"Meanwhile, greens and tans swirled in the dark blue water offshore. The dullness of the hues near shore suggests that the water is mostly colored by sediment. It is likely that phytoplankton - microscopic plant-like organisms - contributed to some of the hues farther from the coast."</p>



<p>According to NASA, much of the sediment in this region comes from “glacial flour” carried into the gulf by the Copper River.&nbsp;</p>



<p>"Glacial flour forms as glaciers move over bedrock and grind it into a fine silt. When suspended in water, glacial flour can make the water appear an opaque turquoise color - similar to phytoplankton blooms. The sediment carries iron and other nutrients that can spur the growth of these tiny marine organisms," explained NASA.</p>



<p>Aimee Neeley, a biological oceanographer at NASA’s Goddard Space Flight Center, noted that there are always phytoplankton in the water, but usually at lower levels in the wintertime at these latitudes.</p>



<p>The Gulf of Alaska is a vast and biologically rich body of water that lies at the northernmost part of the Pacific Ocean, encircled by Alaska.&nbsp;</p>



<p>The gulf extends approximately 1,500 miles from the Alaska Peninsula and the Aleutian Islands in the west to the Alexander Archipelago in the east.</p>



<p>Characterized by a subarctic climate, it's known for heavy rain and <a href="https://www.earth.com/news/sea-ice-loss-increases-snowfall-over-west-antarctica/">snowfall</a>. The region is also prone to frequent storms and is a significant pathway for colder northern weather patterns moving into the United States.</p>



<p>The Gulf of Alaska is home to a diverse marine ecosystem. It supports many species of fish, such as salmon and halibut, and is also a habitat for marine mammals like whales, sea lions, and seals.</p>



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



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



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Sediment swirling in the Gulf of Alaska

Fires in Mozambique, Zimbabwe, and South Africa. In late August 2008, Mozambique’s dry season was nearing its peak. The rainy season typically starts around October. During the dry season each year, agriculture-related fires are widespread. This image of the country shows the number of active fires (locations marked in red) detected by the Moderate Resolution Imaging Spectroradiometer (MODIS) on <a href="http://www.earth.com/video/nasa-captures-a-stars-explosive-encounter-with-a-black-hole/">NASA’s</a> Aqua satellite on August 26. Skies were hazy with smoke. Although such fires are not necessarily immediately hazardous, they can have a significant impact on climate, human health, and natural resources.

Mozambique (/ˌmoʊzæmˈbiːk/), officially the Republic of Mozambique (<a href="https://en.wikipedia.org/wiki/Portuguese_language">Portuguese</a>: Moçambique or República de Moçambique, Portuguese pronunciation: [ʁɛˈpuβlikɐ ðɨ musɐ̃ˈbikɨ]; Chichewa: Mozambiki; Swahili: Msumbiji; Tsonga: Muzambhiki), is a country located in Southeast Africa bordered by the Indian Ocean to the east, Tanzania to the north, Malawi and Zambia to the northwest, Zimbabwe to the west, and Eswatini (Swaziland) and South Africa to the southwest. The sovereign state is separated from the Comoros, Mayotte and Madagascar by the Mozambique Channel to the east. The capital and largest city of Mozambique is Maputo (formerly known as "Lourenço Marques" from 1876 to 1976).
Between the first and fifth centuries AD, Bantu-speaking peoples migrated to present-day Mozambique from farther north and west. Northern Mozambique lies within the monsoon trade winds of the Indian Ocean. Between the 7th and 11th centuries, a series of Swahili port towns developed here, which contributed to the development of a distinct Swahili culture and language. In the late medieval period, these towns were frequented by traders from Somalia, Ethiopia, Egypt, Arabia, Persia, and India.

Credit: NASA image by Jeff Schmaltz, MODIS Rapid Response Team. Caption by Rebecca Lindsey.

Fires in Mozambique, Zimbabwe, and South Africa

<p>Ever felt like that 30-minute workout dragged on like an agonizingly slow scene in a bad movie?  It’s not your imagination. Turns out, <a href="https://www.earth.com/news/this-exercise-routine-can-cut-your-risk-of-early-death-in-half/" target="_blank" rel="noreferrer noopener">exercise</a> can warp your sense of time. A new study adds an exciting twist to the story.</p>



<h2 class="wp-block-heading" id="h-exercise-and-time-perception">Exercise and time perception</h2>



<p>A recent study found that our internal sense of time stretches out or slows down for many individuals during <a href="https://www.earth.com/news/women-achieve-greater-benefits-from-exercise-with-less-effort/" target="_blank" rel="noreferrer noopener">exercise</a>. This feeling is more pronounced during exercise than when we're at rest, either before or after a workout.</p>



<p>The study is innovative because it looks specifically at how time perception changes during the kind of intense, self-regulated exercise that mimics real-life athletic competition. Previous research often used fixed-intensity exercise protocols, which weren't as reflective of the dynamic nature of sports or competitive workouts. This makes the findings more applicable to those situations.</p>



<h2 class="wp-block-heading" id="h-einstein-was-right-time-nbsp-is-nbsp-relative">Einstein was right – Time&nbsp;<em>is</em>&nbsp;relative</h2>



<p>Albert Einstein was a brilliant physicist who revolutionized our understanding of time and space. His theory of relativity suggests that the passage of time isn't absolute, but instead depends on the observer's frame of reference and the influence of gravity.</p>



<p>Einstein's thought experiment illustrated the subjective nature of time. A moment can seem to last forever in unpleasant situations, while time seems to rush by when we're engaged in enjoyable experiences. </p>



<p>This workout study demonstrates that physical exertion can distort our perception of time, making it feel slower than usual.</p>



<h2 class="wp-block-heading" id="h-how-does-exercise-change-the-time-speed">How does exercise change the time speed?</h2>



<p>Scientists are still figuring out the exact details of how several factors interact to distort time perception during <a href="https://www.earth.com/news/exercise-significantly-lowers-heart-disease-risk-by-reducing-stress/" target="_blank" rel="noreferrer noopener">exercise</a>. It's a complex question with no simple answer yet. They propose the following theories: </p>



<h3 class="wp-block-heading" id="h-theory-1-the-brain-gets-overloaded">Theory 1: The brain gets overloaded</h3>



<p>During exercise, your brain receives a massive surge of information from your body. That means a lot to process for your brain's attention and control centers.</p>



<p>Your brain has to monitor your breathing rate, adjust your heart rate, coordinate complex muscle movements, and manage any feelings of pain or fatigue. All this effort could divert your brain's resources away from its usual time-tracking mechanisms. </p>



<h3 class="wp-block-heading" id="h-theory-2-it-s-all-about-the-chemicals">Theory 2: It's all about the chemicals</h3>



<p>Physical exertion triggers significant changes in your body's chemistry. A rush of hormones and neurotransmitters floods your system.</p>



<p>These are the brain's chemical messengers. Exercise increases the release of neurotransmitters like dopamine, endorphins, and adrenaline, which impact mood, arousal, and focus.</p>



<p>This change in brain chemistry could also affect areas related to our perception of time. It's like those chemicals change the "clock speed" of how your brain is operating, which could make time feel like it's moving faster or slower.</p>



<h2 class="wp-block-heading" id="h-does-competition-affect-time-perception-in-exercise">Does competition affect time perception in exercise?</h2>



<p>The study distinguishes itself by investigating a crucial question: Does the presence of competition alter how we perceive time during exercise? Previous research hadn't fully explored this aspect of <a href="https://www.earth.com/news/exercise-all-types-proven-to-ease-depression-symptoms/" target="_blank" rel="noreferrer noopener">exercise</a> psychology.</p>



<p>To test this, the researchers recruited a group of moderately to highly active individuals. Participants engaged in cycling trials on specialized stationary bikes designed to simulate a competitive race environment. The trials varied in condition: some were solo rides, while others involved either a non-responsive virtual competitor or a virtual opponent who actively changed pace throughout the race.</p>



<p>Surprisingly, the findings showed that the presence of virtual competitors had little to no impact on the participants' perception of time. This suggests that the primary factor influencing time distortion is the act of physical exertion itself, rather than the psychological pressure or excitement of a competitive setting.</p>



<p>“The take home message for this study is that our perception of time is indeed impacted by exercise,” said study author <a href="https://www.canterbury.ac.uk/people/andrew-edwards" target="_blank" rel="noreferrer noopener">Andrew Mark Edwards</a>, a professor and Head of School for Psychology &amp; Life Sciences at <a href="https://www.canterbury.ac.uk" target="_blank" rel="noreferrer noopener">Canterbury Christ Church University</a>.</p>



<p>“This could be useful information in terms of accurately pacing sport and exercise activities such as devising strategies to mitigate periods where time appears to drag and can be demotivating."</p>



<h2 class="wp-block-heading" id="h-what-does-this-mean-for-daily-workouts">What does this mean for daily workouts?</h2>



<p>Most people who exercise regularly have experienced those moments where time seems to crawl, especially during challenging parts of a workout. This feeling of time slowing down can be incredibly demotivating and make it tempting to cut a workout short.</p>



<p>The key findings of this study could pave the way for new strategies to help both athletes and everyday gym-goers overcome this mental hurdle. The goal is to develop strategies specifically designed to combat those periods where our perception of time becomes distorted, making exercise feel less enjoyable and harder to sustain.</p>



<p>Intuitively, you might assume that the harder a workout feels, the more time would seem to drag. However, this study offers a surprising insight: there doesn't appear to be a direct relationship between your subjective rating of exertion (how intensely you're working out) and how much time seems to slow down. This means that even during less intense periods of exercise, your perception of time can still become warped.</p>



<h2 class="wp-block-heading" id="h-future-directions">Future directions</h2>



<p>"This was a study of recreationally active participants in only one mode of <a href="https://www.earth.com/news/how-much-exercise-reduces-the-risk-of-premature-death/" target="_blank" rel="noreferrer noopener">exercise</a> so the results ought to be considered in the context of that activity/population," Edwards explained. "More work is required to see if this is widely applicable." The team will explore this further with different types of athletes and exercise.</p>



<p>Beyond the workout world, this research might even be useful when folks are using exercise as therapy. "The main strands of the work are to see how we can motivate people to engage with exercise and avoid/mitigate negative associations with time appearing to move slowly," said Edwards.</p>



<p>Sweat sessions bend your mind in more ways than one. If your workouts feel tortuously long sometimes, you're not alone. Hopefully, this research will help us come up with ways to make exercise more enjoyable.</p>



<p>The study is published in the journal&nbsp;<em><a href="https://onlinelibrary.wiley.com/doi/10.1002/brb3.3471" target="_blank" rel="noreferrer noopener">Brain and Behavior</a></em>.</p>



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Slow motion: Exercise changes our perception of time

Ever felt like that 30-minute workout dragged on like an...

<p>Life in the wilds of the Yukon is a relentless test of survival. For the red squirrels that inhabit this territory, danger lurks around every corner - freezing temperatures, scarce resources, and hungry predators. So how do <a href="https://www.earth.com/news/southern-flying-squirrel-spotted-after-more-than-four-decades/" target="_blank" rel="noreferrer noopener">squirrels</a> manage the traumas? </p>



<p>Why do some squirrels live longer, healthier lives than others? Scientists are discovering fascinating answers that even have implications for our understanding of human stress and resilience.</p>



<h2 class="wp-block-heading" id="h-early-traumas-shorter-squirrel-lives">Early traumas, shorter squirrel lives</h2>



<p>Lauren Petrullo, a researcher at the <a href="https://www.arizona.edu" target="_blank" rel="noreferrer noopener">University of Arizona</a>, is deeply involved in studying the survival factors of red squirrels. Her recent study highlights a significant finding: young red squirrels that encounter numerous traumas during their first year typically experience a reduction in their adult lifespan. </p>



<p>Specifically, in the challenging conditions of the Yukon, such early life stress leads to an average lifespan reduction of at least 14 percent. This research underscores the critical impact of early developmental conditions on the longevity of these animals.</p>



<p>"The ecosystem red squirrels inhabit in this region is unique. Every three to seven years, their favorite food – seed from cones of white spruce trees – is produced in superabundance during what we call a food boom," Petrullo said.</p>



<p>"We found that these booms, even though rare, can interrupt the biological embedding of early-life adversity. If a squirrel had a harsh first year of life, if they were lucky enough to experience a food boom in their second year of life, they lived just as long – if not longer – in spite of early-life adversity."&nbsp;</p>



<h2 class="wp-block-heading" id="h-what-is-a-food-boom">What is a food boom?</h2>



<p>A food boom is a sudden and significant increase in the availability of food resources within an animal's environment. There are multiple causes behind food booms. Some food sources experience cyclical booms and busts. For example, trees that produce nuts or seeds might only have huge yields every few years.</p>



<p>Additionally, favorable weather conditions can lead to increased plant growth, insect populations, or other food sources for animals. The removal of a predator or the introduction of a new prey species can disrupt the balance and make more food available for some animals.</p>



<h2 class="wp-block-heading" id="h-food-boom-benefits">Food boom benefits</h2>



<p>Even with a rough beginning, plentiful food sources can repair damage caused by early-life stress in animals. The research shows that squirrels who had difficult early lives, and later experienced a surge in food availability,  had lifespans comparable to (or even exceeding) squirrels who never had to experience hardship. </p>



<p>This implies that the benefits of a food boom extend beyond simple nutrition. A possible explanation is that abundant food favorably alters the animal's surroundings by decreasing the need for competition and ultimately improving chances of survival.</p>



<h2 class="wp-block-heading" id="h-study-significance">Study significance</h2>



<p>"Our findings in red squirrels echo what we know about how early-life adversity can shorten adult lifespan in humans and other primates," said Petrullo. </p>



<p>The main takeaway from this research is the concept of resilience. Similar to squirrels, individuals vary in their ability to cope with the lingering effects of early life trauma. The study proposes that later positive experiences are significant in determining the extent to which early stress affects an individual.</p>



<p>Squirrels are often subjects in laboratory studies due to their physiological similarities to humans. However, Lauren Petrullo emphasizes the value of studying these animals in their natural surroundings. This approach provides a clearer view of how stress, resilience, and environmental factors interact dynamically outside the controlled conditions of a lab.</p>



<h2 class="wp-block-heading" id="h-climate-change-a-new-challenge-to-squirrel-trauma">Climate change: A new challenge to squirrel trauma</h2>



<p>The survival strategies of red squirrels, particularly their reliance on periodic food booms, have developed to thrive within a specific climatic context. Unfortunately, the escalating issue of global <a href="https://www.earth.com/news/how-are-squirrels-adapting-to-climate-change/" target="_blank" rel="noreferrer noopener">warming</a> poses a significant threat to these patterns. </p>



<p>Rising temperatures have the potential to disrupt the timing and abundance of these crucial food booms. If these natural events become less frequent or less predictable, <a href="https://www.earth.com/news/climate-change-affects-ground-squirrels-in-unexpected-ways/" target="_blank" rel="noreferrer noopener">squirrels</a> that encounter significant challenges early in life may find themselves even more vulnerable to the adverse effects of their harsh environments. This could result in increased mortality rates and impact the overall population stability of the species.</p>



<p>"As food boom patterns begin to change, the pathways that connect early-life experiences and lifespan may change as well, potentially offering important insight into how animals may adapt to increasingly challenging environments," said Petrullo.</p>



<p>This research isn't just about squirrels and their trauma. It's a captivating story about survival, where even in harsh conditions, there's always hope. Just like a lucky food boom can alter a squirrel's fate, our own paths might hold life-changing opportunities. </p>



<p>As scientists continue to study these resilient creatures, we may not only discover the secrets to their success, but also gain valuable insights to enhance our own well-being.</p>



<p>The study is published in the journal <em><a href="https://royalsocietypublishing.org/doi/10.1098/rspb.2023.2681" target="_blank" rel="noreferrer noopener">Proceedings of the Royal Society B Biological Sciences</a></em>.</p>



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Early trauma cuts life short for squirrels, but this can be reversed

Life in the wilds of the Yukon is a relentless...

<p>As our planet warms and urban areas expand, the threat of mosquito-borne diseases such as malaria and dengue is escalating, reaching regions previously untouched by these dangerous illnesses. </p>



<p>Now, with over half of the global population at risk, these <a href="https://www.earth.com/news/tick-mosquito-borne-disease-spreading/" target="_blank" rel="noreferrer noopener">diseases</a> have quickly become a critical concern worldwide.</p>



<h2 class="wp-block-heading" id="h-the-global-spread-of-disease-vectors">The global spread of disease vectors</h2>



<p><a href="https://www.earth.com/news/how-mosquitoes-find-tasty-humans-from-hundreds-of-meters-away/" target="_blank" rel="noreferrer noopener">Mosquitoes</a>, the primary vectors for diseases like malaria and dengue, are finding suitable habitats far beyond their traditional tropical and subtropical locales. This expansion is due in part to longer and hotter seasons that allow mosquito larvae to survive and thrive in new areas. </p>



<p>As these insects invade places like northern Europe, Asia, North America, and Australia, local populations face increased risks - often in areas where people lack immunity and public health systems are unprepared.</p>



<h2 class="wp-block-heading" id="h-insights-from-the-front-lines-of-research">Insights from the front lines of research</h2>



<p>At the upcoming ESCMID Global Congress in Barcelona, <a href="https://www.icrea.cat/" target="_blank" rel="noreferrer noopener">ICREA</a> Professor Rachel Lowe will present her latest findings on this issue. </p>



<p>Professor Lowe, who leads the global health resilience group at the Barcelona Supercomputing Center in Spain, will discuss the dramatic shifts in vector-borne disease patterns and the essential role of enhanced surveillance and early warning systems.</p>



<p>"Droughts and floods linked to <a href="https://www.earth.com/news/climate-change-is-great-for-mosquitoes/" target="_blank" rel="noreferrer noopener">climate change</a> can lead to greater transmission of the virus, with stored water providing additional mosquito breeding sites," noted Professor Lowe. Her research in the Caribbean shows that extreme climate conditions such as drought followed by excessive rainfall can significantly increase the likelihood of dengue outbreaks. </p>



<p>These findings underscore the need for comprehensive assessments of vector-borne disease risks and preparedness for future outbreaks.</p>



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



<p>Dengue, which is spread by day-biting mosquitoes, has dramatically increased in spread and frequency. </p>



<p>Since 2000, the most hospitable years for dengue transmission have facilitated the mosquito's invasion into 13 European countries, including France, Italy, and Spain, with local disease outbreaks reported as recently as 2023.</p>



<p>Furthermore, the number of global <a href="https://www.earth.com/news/dengue-fever-modified-mosquitoes/" target="_blank" rel="noreferrer noopener">dengue</a> cases reported surged from 500,000 in 2000 to over five million in 2019. This makes dengue the most rapidly spreading mosquito-borne viral disease in the world.</p>



<h2 class="wp-block-heading" id="h-projecting-future-mosquito-disease-outbreaks">Projecting future mosquito disease outbreaks</h2>



<p>The data suggests a daunting future if current trends continue. With <a href="https://www.earth.com/news/global-warming-dengue-fever/" target="_blank" rel="noreferrer noopener">global warming</a> and population growth proceeding unchecked, projections are increasingly alarming. They indicate that up to 4.7 billion additional people could be at risk of contracting malaria and dengue by the end of the century.</p>



<p>On the other hand, if global warming is limited to an ambitious goal of a 1°C increase, the number of people at risk could be significantly reduced, although it would still be substantial.</p>



<h2 class="wp-block-heading" id="h-the-role-of-el-nino-in-mosquito-disease-outbreaks">The role of el niño in mosquito disease outbreaks </h2>



<p>El Niño events, which occur every 2-7 years, exacerbate these issues by creating hotter and wetter conditions that are ideal for mosquito breeding.</p>



<p>Professor Lowe highlights the direct link between these climatic fluctuations and disease outbreaks. Specifically, the Zika pandemic in Brazil, which emerged during an El Niño phase in 2015, was a direct result of climate conditions.</p>



<p>Furthermore, the current strength of El Niño suggests that these challenging conditions are likely to continue.</p>



<h2 class="wp-block-heading" id="h-climate-change-and-mosquito-borne-diseases">Climate change and mosquito-borne diseases</h2>



<p>Professor Lowe stresses the urgency of addressing climate change to mitigate the spread of these diseases. "With climate change seeming so difficult to address, we can expect to see more cases and possibly deaths from diseases such as dengue and malaria across mainland Europe." </p>



<p>Therefore, proactive measures, including robust surveillance systems and early interventions, are crucial to preventing outbreaks.</p>



<p>Researchers are now using advanced technologies to better anticipate disease outbreaks. These technologies include supercomputers, drones for identifying breeding sites, and community-based reporting systems to direct resources effectively.</p>



<p>"By analyzing weather patterns and gathering information from local communities and health officials, we are hoping to give communities time to prepare and protect themselves," said Professor Lowe. </p>



<h2 class="wp-block-heading" id="h-united-efforts-are-needed">United efforts are needed </h2>



<p>Ultimately, the most effective strategy to reduce the risk of disease spread is to dramatically curb emissions and address the root causes of climate change.</p>



<p>As mosquito-borne diseases expand their reach, the need for global cooperation and innovative solutions has never been greater. </p>



<p>Through informed research, proactive planning, and international collaboration, we can help to shield vulnerable populations from these escalating health threats.</p>



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Mosquito-borne diseases are a growing threat in a warming world

As our planet warms and urban areas expand, the threat...

<p>The mating strategies of squid are determined by their date of birth, according to a recent study from the <a href="https://www.u-tokyo.ac.jp/ja/index.html">University of Tokyo</a>. The research sheds new light on the reproductive tactics of male spear squids.</p>



<p>While humans might consider how their birth date influences personality or destiny, for these marine creatures, the timing of birth crucially influences their approach to mating.</p>



<p>"Alternative reproductive tactics (ARTs) are discontinuous phenotypes associated with reproduction, observed in males of many species," wrote the study authors. "Typically, large males adopt a tactic of competing with rivals for mating, while small males adopt a tactic of stealing fertilization opportunities from the large males."</p>



<p>"The ‘birth date hypothesis,' proposing that the date of birth influences the determination of each male's reproductive tactic, has been tested only in teleost fish to date."</p>



<h2 class="wp-block-heading" id="h-a-date-with-destiny">A date with destiny</h2>



<p>Scientifically known as Heterololigo bleekeri, spear squids adopt one of two mating strategies. Males born earlier in the breeding season grow larger and become "consorts," aggressively competing with rivals to mate and protect females during egg-laying. </p>



<p>On the other hand, males that hatch later in the season are typically smaller when they start reproducing and choose a "sneaker" tactic. These squids deposit their sperm on the outside of a female near where she lays her eggs - hoping to fertilize them.</p>



<h2 class="wp-block-heading" id="h-the-unchanging-nature-of-squid-mating-tactics">The unchanging nature of squid mating tactics</h2>



<p>The experts discovered that once a male squid's mating tactic is set by his birth date, it remains unchanged throughout his life. </p>



<p>This pattern is so robust that even if an early-born squid could theoretically adopt the sneaker strategy during the early breeding season due to size, he would instead delay his maturation to grow sufficiently large to become a consort. </p>



<p>"The presence of large immature males appears to support this (i.e. these immature males may have been delaying their maturation in a non-reproductive state as a tactic to become a successful consort later in the season)," noted the researchers.</p>



<p>This all-or-nothing approach to mating tactics is remarkably consistent, with <a href="https://www.earth.com/news/scientists-have-created-a-transparent-squid-allowing-them-to-see-inside-while-its-still-alive/" target="_blank" rel="noreferrer noopener">squids</a> born around early July displaying a fifty-fifty chance of adopting either strategy.</p>



<h2 class="wp-block-heading" id="h-ecological-and-commercial-ramifications">Ecological and commercial ramifications</h2>



<p>Professor Yoko Iwata of the Atmosphere and Ocean Research Institute at the University of Tokyo explained the significance of these findings. "The hatching date determines the whole life trajectory in this species. The difference in hatch date means that the squid experience different environmental conditions in early life, which may influence their growth trajectory." </p>



<p>She further elaborated on the potential repercussions of environmental changes, such as ocean heat waves, on <a href="https://www.earth.com/news/squid-have-unexpected-camouflage-ability/" target="_blank" rel="noreferrer noopener">squid</a> sizes and their mating tactics, which could significantly impact commercial fishing yields.</p>



<p>The research is notable as it extends the "birth date hypothesis" to aquatic invertebrates, suggesting its broader applicability across more animal species.</p>



<h2 class="wp-block-heading">New insights into squid growth rates</h2>



<p>The team analyzed more than 350 specimens collected between 2020 and 2023, sourced directly or from commercial catches. The results challenge previous beliefs about the growth rates among different squid mating types.</p>



<p>Although environmental factors like water temperature are well-known to influence squid development, the researchers discovered surprisingly little variation in the early life growth rates of consorts and sneakers.</p>



<p>This discovery raises new questions about the factors influencing the growth and reproduction of male spear squids.</p>



<h2 class="wp-block-heading">The significance of statoliths in squid research</h2>



<p>Looking ahead, the researchers will turn their attention to the statolith, a key structure within the squid that documents daily growth in a manner akin to tree rings. </p>



<p>By analyzing microelements within the statolith, experts can determine the age of squids as well as the environmental conditions they encountered during various life stages.</p>



<p>Professor Iwata expressed excitement about the potential implications of their findings. "I am interested in the evolution of animal survival and reproduction strategies, or life history; and also phenotypic plasticity, that is, how individuals respond to environmental changes. Spear squid provide an ideal model for studying the impact of environmental and ecological conditions on life history."</p>



<p>The research will further illuminate how early life conditions affect squid mating tactics and provide deeper insights into how other marine species adapt to environmental changes.</p>



<p>The study is published in the journal <a href="https://royalsocietypublishing.org/doi/10.1098/rspb.2024.0156" target="_blank" rel="noreferrer noopener">Proceedings of the Royal Society B Biological Sciences</a>.</p>



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



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

Squid mating tactics are determined by birth date

The mating strategies of squid are determined by their date...

<p>Space is a never-ending source of fascination for us Earthlings. From the twinkle of stars to swirling galaxies, there's always something new to discover. Scientists at <a href="https://www.mit.edu" target="_blank" rel="noreferrer noopener">MIT</a> recently announced the discovery of a new space molecule in the dust clouds where stars are born.</p>



<h2 class="wp-block-heading" id="h-molecules-in-space">Molecules in space</h2>



<p>Space is not just an empty void; it's filled with diverse chemical compounds. It contains simple life-essential molecules like water (H2O) and carbon dioxide (CO2). Additionally, <a href="https://www.earth.com/news/astronomers-map-the-dark-chemistry-of-outer-space/" target="_blank" rel="noreferrer noopener">space</a> harbors more complex organic molecules, some similar to industrial solvents.</p>



<p>The interactions of compounds in the interstellar medium are intriguing. They transform in ways that may reveal how life's building blocks originated. Interestingly, these processes could provide clues about the emergence of life itself.</p>



<h2 class="wp-block-heading" id="h-space-experts-hunt-for-new-molecule">Space experts hunt for new molecule</h2>



<p>A research team at MIT, led by Professor Brett McGuire, is actively studying the molecular composition of the vast interstellar clouds where stars and planetary systems form. This work aims to answer fundamental questions about the chemical processes that occur during these formative stages. </p>



<p>"Our group tries to understand what molecules are present in regions of <a href="https://phys.org/tags/space/">space</a> where stars and solar systems will eventually take shape," explained Zachary T.P. Fried, a graduate student in the McGuire group and the lead author of the publication. </p>



<p>"This allows us to piece together how chemistry evolves alongside the process of star and planet formation. We do this by looking at the rotational spectra of molecules, the unique patterns of light they give off as they tumble end-over-end in space."</p>



<h2 class="wp-block-heading" id="h-spectral-signature">Spectral signature</h2>



<p>Understanding chemical environments at early stages is essential. The molecules in these environments affect the properties of forming <a href="https://www.earth.com/news/complex-organic-molecules-discovered-surrounding-newborn-star-iras-23385/" target="_blank" rel="noreferrer noopener">planets</a> and their ability to support life. </p>



<p>The MIT team uses powerful telescopes to observe electromagnetic radiation from deep space molecules. Each molecule interacts with light uniquely, creating a distinct spectral signature. This signature helps identify the molecule.</p>



<p>The research process begins by selecting a target molecule. Scientists analyze the molecule in a laboratory setting to precisely determine its spectral signature. They then use telescopes to scan star-forming regions, searching for a match between the laboratory-derived signature and the telescopic observations. A positive match confirms the presence of the target molecule within the distant interstellar cloud.</p>



<h2 class="wp-block-heading" id="h-2-methoxyethanol">2-methoxyethanol</h2>



<p>In 2023, an AI-driven computer program played a key role in astronomical research. It identified a molecule called 2-methoxyethanol as a promising target for observation. This molecule is a complex organic compound, not commonly found in everyday products.</p>



<p>"There are a number of 'methoxy' molecules in space, like dimethyl ether, methoxymethanol, ethyl methyl ether, and methyl formate, but 2-methoxyethanol would be the largest and most complex ever seen," said Fried.</p>



<p>After collaborating with global scientists, the MIT team predicted the molecule's spectral signature. They then embarked on an intensive search effort. To detect the faint signals emitted by molecules in distant space, they utilized the Atacama Large Millimeter/submillimeter Array (ALMA), a state-of-the-art international observatory located in Chile's high-altitude Atacama Desert. </p>



<p>ALMA's exceptional sensitivity and resolution allow astronomers to probe the depths of the universe in search of even the most subtle molecular emissions. The team meticulously analyzed the vast dataset generated by ALMA, searching for the specific spectral pattern associated with 2-methoxyethanol.&nbsp;</p>



<p>"Ultimately, we observed 25 rotational lines of 2-methoxyethanol that lined up with the <a href="https://phys.org/tags/molecular+signal/">molecular signal</a> observed toward NGC 6334I (the barcode matched), thus resulting in a secure detection of 2-methoxyethanol in this source," said Fried. </p>



<p>"This allowed us to then derive physical parameters of the molecule toward NGC 6334I, such as its abundance and excitation temperature. It also enabled an investigation of the possible chemical formation pathways from known interstellar precursors."</p>



<h2 class="wp-block-heading" id="h-significance-of-new-space-molecule">Significance of new space molecule</h2>



<p>The vast clouds of gas and dust where stars are born act as complex chemical environments. Within these clouds, a diverse array of molecules exist, ranging from simple compounds to larger, more intricate structures. </p>



<p>These molecules represent the fundamental building blocks from which <a href="https://www.earth.com/news/building-blocks-of-life-found-in-a-galaxy-12-billion-light-years-away/" target="_blank" rel="noreferrer noopener">planets</a>, asteroids, and potentially even the precursors to life can form. The presence of increasingly complex molecules within these regions suggests a wider range of possibilities for the types of environments that can develop within emerging planetary systems.</p>



<p>The discovery of 2-methoxyethanol, a relatively large and complex organic molecule, highlights the surprising chemical processes that can occur in the seemingly harsh conditions of deep space. This discovery suggests that even in the coldest depths of the cosmos, the conditions exist to create molecules of significant complexity.</p>



<p>"Continued observations of large molecules and subsequent derivations of their abundances allows us to advance our knowledge of how efficiently large molecules can form and by which specific reactions they may be produced," said Fried.</p>



<p>"Additionally, since we detected this molecule in NGC 6334I but not in IRAS 16293-2422B, we were presented with a unique opportunity to look into how the differing physical conditions of these two sources may be affecting the chemistry that can occur."</p>



<p>The study is published in the journal <em><a href="https://iopscience.iop.org/article/10.3847/2041-8213/ad37ff" target="_blank" rel="noreferrer noopener">The Astrophysical Journal Letters</a></em>.</p>



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



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New molecule detected in space where stars are born

Space is a never-ending source of fascination for us Earthlings....

<p>Did you know that the very space station orbiting miles above our heads is helping us better understand how our planet's climate is changing? It might sound surprising, but the International Space Station (<a href="https://www.nasa.gov/international-space-station/" target="_blank" rel="noreferrer noopener">ISS</a>) isn't just about exploring the cosmos – it's about protecting our home planet too.</p>



<h2 class="wp-block-heading" id="h-iss-climate-data-collection">ISS climate data collection</h2>



<p>Climate change is a pressing issue impacting every corner of the globe. From experiencing increasingly scorching summers to witnessing unpredictable and often destructive weather patterns, the consequences are undeniable. To effectively prepare communities for these ongoing shifts, scientists require a wealth of accurate data. </p>



<p>The International Space Station, with its unique vantage point, plays a critical role in climate data collection. Orbiting Earth at high speeds, the <a href="https://www.earth.com/news/the-iss-is-contaminated-with-a-disturbing-amount-of-harmful-chemicals/" target="_blank" rel="noreferrer noopener">ISS</a> effectively performs regular flybys of nearly the entire planet. </p>



<p>This exceptional position allows its suite of instruments to continuously gather information from various locations, both day and night. The data collected by the ISS is proving invaluable in furthering our understanding of climate change and its effects.</p>



<h2 class="wp-block-heading" id="h-iss-climate-toolkit">ISS climate toolkit</h2>



<p>Let's explore some of ISS's instruments – it's like a space toolbox made to measure our changing planet:</p>



<h3 class="wp-block-heading" id="h-ecostress-the-plant-stress-detector-nbsp">ECOSTRESS: The plant stress-detector&nbsp;</h3>



<p>The ECOsystem Spaceborne Thermal Radiometer Experiment on Space Station (ECOSTRESS) operates similarly to a giant thermometer, but instead of measuring air temperature, it measures the temperature of plants themselves. </p>



<p>This allows scientists to identify areas where vegetation is facing stress due to excessive heat or insufficient water. This information is crucial for understanding how <a href="https://www.earth.com/news/nasa-initiates-ambitious-plan-to-bring-iss-back-to-earth/" target="_blank" rel="noreferrer noopener">climate</a> change impacts vital ecosystems like rainforests.</p>



<p>Climate change presents a complex global challenge. ECOSTRESS enables scientists to directly observe how ecosystems are responding to these ongoing changes.</p>



<h2 class="wp-block-heading" id="h-tsis-keeping-an-eye-on-the-sun-nbsp">TSIS: Keeping an eye on the sun&nbsp;</h2>



<p>The Sun acts as Earth's primary energy source, constantly bathing our planet in radiation. Even minor fluctuations in this energy output can have significant consequences for our climate. The Total and Spectral Solar Irradiance Sensor (TSIS) meticulously tracks the Sun's energy emissions. </p>



<p>This instrument functions like a highly precise monitor, continuously measuring the total amount of solar energy reaching Earth (Total Solar Irradiance) and the distribution of that energy across various wavelengths (Spectral Solar Irradiance). </p>



<p>By meticulously monitoring these values, scientists can gain valuable insights into how changes in solar activity might influence Earth's climate system.</p>



<h3 class="wp-block-heading" id="h-gedi-forests-in-focus-nbsp">GEDI: Forests in focus&nbsp;</h3>



<p>Forests play a critical role in maintaining a healthy climate for our planet. They act as massive carbon sinks, absorbing significant quantities of carbon dioxide, a major greenhouse gas. </p>



<p>The Global Ecosystem Dynamics Investigation (GEDI) utilizes cutting-edge laser technology to create incredibly detailed three-dimensional maps of Earth's forests. This advanced technology allows scientists to precisely measure various forest characteristics, including the total volume of vegetation and the overall distribution of trees across a landscape. </p>



<p>This information is invaluable for tracking the amount of carbon stored within forests. This helps scientists understand how these vital ecosystems are changing in response to climate pressures. By monitoring these changes, we can develop more effective strategies for protecting and managing our precious forests.</p>



<h3 class="wp-block-heading" id="h-emit-unmasking-methane-nbsp">EMIT: Unmasking methane&nbsp;</h3>



<p>Methane, while less abundant than carbon dioxide, is a far more potent greenhouse gas, significantly contributing to global warming. The Earth Surface Mineral Dust Source Investigation (EMIT) instrument possesses the remarkable ability to detect and pinpoint methane leaks from space. </p>



<p>This technological breakthrough is revolutionizing how we track and identify methane emission sources. The pinpoint accuracy that EMIT provides allows us to locate the sources of methane release, enabling targeted efforts to limit the impact of these emissions. </p>



<p>EMIT's technology represents a significant leap forward in our ability to locate methane sources and take the necessary steps to mitigate these emissions worldwide.</p>



<h3 class="wp-block-heading" id="h-oco-3-carbon-dioxide-detective-nbsp">OCO-3: Carbon dioxide detective&nbsp;</h3>



<p><a href="https://www.earth.com/video/iss-rapidscat-monitoring-earth-from-the-space-station/" target="_blank" rel="noreferrer noopener">ISS</a>'s Orbiting Carbon Observatory-3 (OCO-3) instrument is specifically designed to track carbon dioxide, a major driver of climate change. OCO-3 operates with exceptional precision, continuously monitoring and measuring the global distribution of atmospheric carbon dioxide. </p>



<p>This detailed information functions like a powerful magnifying glass, allowing scientists to pinpoint areas with particularly high concentrations of carbon dioxide. This newfound ability to visualize and track these "hotspots" of carbon dioxide emissions is proving invaluable in supporting international efforts to reduce greenhouse gas emissions. </p>



<p>By identifying specific emission sources, OCO-3 data empowers nations to develop more targeted strategies for curbing carbon dioxide pollution.</p>



<h3 class="wp-block-heading" id="h-sage-iii-iss-monitoring-the-atmosphere-s-layers-nbsp">SAGE III-ISS: Monitoring the atmosphere's layers&nbsp;</h3>



<p>Our planet's atmosphere acts as a protective shield, safeguarding us from harmful solar radiation and regulating Earth's temperature. </p>



<p>To better understand how human activities and natural phenomena affect this vital shield, the Stratospheric Aerosol and Gas Experiment III-ISS (SAGE III-<a href="https://www.earth.com/video/iss-rapidscat-starts-measuring-earth-wind/" target="_blank" rel="noreferrer noopener">ISS</a>) meticulously analyzes the intricate layers of Earth's atmosphere. </p>



<p>This instrument measures the concentration and distribution of various gases and tiny particles, known as aerosols, within each atmospheric layer. By monitoring these components, scientists gain valuable insights into how factors like pollutants impact the composition of the atmosphere. </p>



<p>The data collected by SAGE III-ISS plays a crucial role in improving the accuracy of climate models. These models rely on precise information about atmospheric composition and behavior to effectively simulate future climate scenarios. </p>



<p>With the data provided by SAGE III-ISS, scientists can refine these models, leading to more accurate predictions and a deeper understanding of the complex interactions within our planet's climate system.</p>



<h2 class="wp-block-heading" id="h-the-iss-is-essential-in-the-fight-against-climate-change">The ISS is essential in the fight against climate change </h2>



<p>As evident, the ISS plays a far more active role than simply observing Earth from afar. It serves as a vital platform for gathering the comprehensive climate data that scientists urgently need to address climate change. </p>



<p>By analyzing <a href="https://www.earth.com/news/nasa-initiates-ambitious-plan-to-bring-iss-back-to-earth/" target="_blank" rel="noreferrer noopener">ISS's</a> rich data set, scientists are equipped to develop innovative solutions for mitigating the effects of our warming planet.</p>



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



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

Data from the ISS helps us monitor climate change

Did you know that the very space station orbiting miles...

<p>Wildfires in Siberia are a global concern, as their increasing frequency is predicted to impact the climate, <a href="https://www.earth.com/news/twenty-years-of-air-quality-improvement-erased-by-wildfires/" target="_blank" rel="noreferrer noopener">air quality</a>, health, and economies far beyond their immediate vicinity. A new study highlights the far-reaching consequences of these natural disasters.</p>



<p>Researchers from <a href="https://www.hokudai.ac.jp/" target="_blank" rel="noreferrer noopener">Hokkaido University</a>, the <a href="https://www.u-tokyo.ac.jp/ja/index.html" target="_blank" rel="noreferrer noopener">University of Tokyo</a>, and <a href="https://www.kyushu-u.ac.jp/en/" target="_blank" rel="noreferrer noopener">Kyushu University</a> used advanced global climate models to analyze the potential impacts of wildfires in Siberia, and the results paint a striking picture. </p>



<p>The experts utilized the MIROC5 - a sophisticated modeling system - along with other predictive tools to actively simulate the broader effects of Siberian fires under current and future <a href="https://www.earth.com/news/wildfire-impacts-are-evolving-due-to-climate-change-but-in-what-ways/" target="_blank" rel="noreferrer noopener">climate</a> scenarios.</p>



<h2 class="wp-block-heading" id="h-climate-s-unexpected-response">Climate's unexpected response</h2>



<p>The simulations revealed that the increased intensity of wildfires in Siberia could lead to significant atmospheric changes, notably a cooling effect across the northern hemisphere. This phenomenon is largely due to the aerosols, or tiny air pollution particles, emitted by the fires which can reflect sunlight away from the earth's surface. </p>



<p>Professor Teppei Yasunari, a key member of the research team, explained: "Our modeling reveals a cooling effect broadly across the northern hemisphere and worsened air quality in extensive downwind regions."</p>



<h2 class="wp-block-heading" id="h-health-implications-of-wildfires-in-siberia">Health implications of wildfires in Siberia </h2>



<p>The aerosols released during these wildfires not only affect the climate but also degrade air quality, leading to serious <a href="https://www.earth.com/news/wildfire-smoke-is-an-underestimated-threat-to-public-health/" target="_blank" rel="noreferrer noopener">health</a> implications.</p>



<p>The researchers predict a dramatic increase in air pollution, especially under the most extreme wildfire scenarios. This pollution impacts not only Siberia but also vast areas of East Asia, which lie downwind from these fires.</p>



<p>The degraded air quality may cause an increase in premature deaths, respiratory problems, and other health issues. This could translate into health-related costs that potentially reach up to 10 billion US dollars annually.</p>



<p>"Our results suggest that increased efforts are needed to limit the effects of the <a href="https://www.earth.com/image/wildfires-in-siberia-2/" target="_blank" rel="noreferrer noopener">Siberian wildfires</a> somehow to prevent excess deaths, respiratory and other illnesses, and economic losses because it is hard to prevent the occurrence of Siberian wildfires in such large areas," said Professor Yasunari.</p>



<h2 class="wp-block-heading" id="h-economic-costs-of-siberia-wildfires">Economic costs of Siberia wildfires</h2>



<p>Beyond health, the economic impacts are also profound. The study suggests that the direct costs associated with increased mortality due to air pollution are substantial. </p>



<p>Additionally, the indirect costs, such as loss of productivity due to illness and reduced educational opportunities, could significantly amplify these figures.</p>



<p>The findings underscore the necessity for more refined models to better quantify and mitigate these impacts. </p>



<p>"Our findings send a critical message about the broad effect of increased particulate matter due to massive wildfires in the atmosphere on climate and air quality, which will become ever more significant as the worldwide changes due to global warming proceed," said Professor Yasunari.</p>



<p>The research not only sheds light on the urgent need for global attention to Siberian wildfires but also calls for international cooperation in <a href="https://www.earth.com/news/fire-suppression-methods-increase-the-severity-of-wildfires/" target="_blank" rel="noreferrer noopener">fire management</a> and mitigation strategies to safeguard public health and protect the global economy from the potentially devastating effects of these increasing natural disasters. </p>



<p>To better understand and address the extensive consequences of wildfires on a global scale, the time to act is now.</p>



<h2 class="wp-block-heading">More about wildfires in Siberia&nbsp;</h2>



<p>Siberian wildfires typically occur during the region's dry and warm summer months. Siberia, known for its vast and remote forested areas, is particularly vulnerable to wildfires due to a combination of factors, including rising temperatures and dry conditions, which are often linked to climate change.</p>



<h3 class="wp-block-heading">Far-reaching impacts&nbsp;</h3>



<p>The impact of Siberian wildfires is extensive, affecting not only local flora and fauna but also contributing to air quality issues over a wide area, including neighboring countries.&nbsp;</p>



<p>The smoke from these fires can travel thousands of kilometers, affecting atmospheric conditions and climate patterns on a global scale. For instance, the dense smoke can reduce visibility and impact air quality, posing health risks to populations even in distant areas.</p>



<h3 class="wp-block-heading" id="h-fire-management">Fire management</h3>



<p>Efforts to combat and manage these fires are challenged by the sheer scale and remoteness of the affected areas. The Russian government and local authorities often struggle with limited resources and logistical difficulties in accessing these regions.&nbsp;</p>



<h3 class="wp-block-heading">Environmental threat</h3>



<p>Moreover, the frequency and intensity of these fires have been increasing, prompting concerns about long-term environmental damage, including the release of stored carbon from Siberian peatlands, which exacerbates global warming.</p>



<p>The study is published in the journal <em><em><a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023EF004129" target="_blank" rel="noreferrer noopener">Earth's Future</a></em></em>.</p>



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



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

Wildfires in Siberia are a growing global threat

Wildfires in Siberia are a global concern, as their increasing...

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<p>Today’s <strong>Video of the Day</strong> from the <a href="https://www.esa.int/">European Space Agency</a> features Nushagak Bay, a large estuary in southwest Alaska. Nushagak runs mainly north to south and exits in Bristol Bay, a large body of water in the Bering Sea.</p>



<p>"The bay is primarily fed by the Nushagak River, which begins in the Alaska Range and flows southwest approximately 450 km. The bay is also fed by several additional rivers including the Wood, Igushik, Snake and Weary rivers," says ESA.</p>



<p>"The dark colors of the Nushagak River are most likely due to tannins or lignins (chemical substances found in plants). Tannins and lignins from roots, leaves, seeds, bark and soil can leach into the water and give it a brown or even black colour. The sediments then flow southwards where it is mixed with the bluer waters of the bay."</p>



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



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



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

Nushagak Bay in southwest Alaska

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

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<p>Today's <strong>Video of the Day</strong> from the <a href="https://www.acs.org/">American Chemical Society</a> (ACS) reveals that proteins on flu viruses are actually flexible, tilting and waving in a “breath-like” motion. According to the experts, these proteins could be used to better defend against the flu.</p>



<p>"The main antigenic targets of influenza virus are two surface glycoproteins, hemagglutinin (HA) and neuraminidase (NA). Whereas the structural and dynamical properties of both glycoproteins have been studied previously, the understanding of their plasticity in the whole-virion context is fragmented," wrote the researchers.</p>



<p>To investigate, the team conducted detailed simulations of the influenza A H1N1 virion, or the swine flu. The experts concluded that the visualizations show many new vulnerable states of flu viruses, which could improve future vaccines and antiviral drugs.</p>



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



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



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



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

Flu viruses are more flexible than expected

[sendtonews key="G9bUoxcjr4-2511624-12187" type="single"] Today's Video of the Day from the...

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<p>Today’s <strong>Video of the Day</strong> from the <a href="https://www.esa.int/">European Space Agency</a> features Lake Trasimeno, which is located west of Perugia in central Italy. It is the fourth largest lake in the country. While Trasimeno’s water level varies, it has a maximum depth of approximately six meters.&nbsp;</p>



<p>"In this Copernicus Sentinel-2 image, captured on 6 August 2022, the lake’s emerald green colour is likely due to the presence of phytoplankton. Streaks in the water, particularly visible in the west, indicate the presence of soil and sediments which have been stirred up by winds. Dark colored waters in the southern part of the lake indicate a presence of submerged and floating macrophytes (aquatic plants) as well as algae," says ESA.</p>



<p>"Surrounded by hills on three sides, Trasimeno is subject to heavy storms created by winds, especially from the north and west. There are three islets in the lake: Maggiore, Minore and Polvese (the largest). The lake’s shores are sparsely inhabited with only two popular villages: Castiglione del Lago and Passignano sul Trasimeno."</p>



<p>"Italy is experiencing its worst drought in 70 years which has affected drinking water supplies, hydroelectric power and agricultural production. High temperatures, hot winds and lack of rainfall are the main causes of drought in the Umbrian region which saw Lake Trasimeno’s drop 1.3 m, reaching the limit of the hydrometric zero in July 2022."</p>



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



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



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

Lake Trasimeno in Central Italy

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<p>Today's <strong>Video of the Day</strong> from the <a href="https://www.acs.org/">American Chemical Society</a> describes a new self-powered nanosensor that can instantly detect mercury contamination with the tap of a finger.&nbsp;</p>



<p>The oxidized form of mercury can be harmful when it is ingested through contaminated water or food. This makes it necessary for experts to develop sensors that can quickly and accurately detect the presence of mercury.&nbsp;</p>



<p>Zong-Hong Lin and colleagues have now created a triboelectric nanosensor (TENS) that can detect mercury by simply by touching a sample. According to the researchers, their TENS could serve as the basis for similar devices to safely and remotely monitor other pollutants.</p>



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



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



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



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

Detecting mercury contamination with the tap of a finger

[sendtonews key="LvS8v8bp9z-2564889-12187" type="single"] Today's Video of the Day from the...

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



<p>In 1968, Kainji Lake was created by the construction of the Kainji Dam. The Niger River, the third longest in Africa, enters the lake in the north.&nbsp;</p>



<p>According to <a href="https://www.earth.com/news/rivers-in-the-american-west-are-a-lifesaving-resource-for-birds/">ESA</a>, the creation of the lake submerged Foge Island and the town of Bussa and permanently flooded other riverine settlements, leaving around 50,000 people displaced.&nbsp;</p>



<p>Large parts of Foge Island are temporarily exposed during low water tides, and the land is often used by migrating fishermen. Kainji Dam is a dam across the Niger River in Niger State of Central Nigeria. </p>



<p>Wild mammals occur at relatively low densities due to illegal hunting. Lake Kainji has suffered a dramatic decline as a fishery due to the high numbers of artisanal and subsistence fisherfolk using the lake. It has been suggested that a period of closure, together with controlled fishing rights may help improve fish stocks.</p>



<p>Kainji Lake National Park is the oldest of its kind in Nigeria. The park contains three distinct areas: a part of the Kainji Lake, the Borgu Game Reserve to the west of the lake, and the Zugurma Game Reserve to the southeast. The park is home to around 65 mammal species, 350 bird species, and 30 species of reptiles and amphibians. </p>



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



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



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

Kainji Lake in north central Nigeria

[sendtonews key="iuA5mpp3jv-1641775-12187" type="single"] Today’s Video of the Day from the...

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



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



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



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



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



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



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



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



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



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



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

Designing crops that can beat the heat

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

<p>Tropical Storm Hanna continued to plow through the Caribbean Sea on September 2, 2008, bringing strong surf and heavy rains to the island of Hispaniola (home to Haiti and the Dominican Republic) before heading to the <a href="https://en.wikipedia.org/wiki/The_Bahamas">Bahamas.</a> This image of the storm was captured by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite. The storm was ragged and sprawling, with no distinct eye. The center of circulation was evident in the bright ball of clouds north of Hispaniola, however. Forecasts as of September 3 were uncertain as to whether the storm would regain hurricane status in coming days.</p>
<p>Tropical Storm Hanna was a moderately strong tropical storm that affected the <a href="https://www.earth.com/news/2-billion-birds-migrate-gulf-coast/">Gulf Coast</a> and Southeastern regions of the United States. The tenth tropical cyclone and eighth named storm of the 2002 Atlantic hurricane season, Hanna formed through the complex interaction of a surface trough, a tropical wave, and an upper-level low pressure system, a disturbance in the upper atmosphere. Designated a tropical depression at 0000 UTC on September 12, the storm remained disorganized throughout its duration, though it attained tropical storm status and a peak intensity of 1,001 mbar (29.6 inHg), with winds of 60 miles per hour (100 km/h). Hanna crossed extreme southeastern Louisiana, and made a second landfall along the Alabama–Mississippi border. Tropical Storm Hanna has caused massive amounts of damage in the city and surrounding areas. Therefore named  of my the strongest hurricanes we have seen in awhile. Tropical Cyclone Hanna has shown the power.</p>
<p>Credit: NASA image by Jeff Schmaltz, MODIS Rapid Response Team, Goddard Space Flight Center. Caption by Rebecca Lindsey.</p>


Tropical Storm Hanna

On May 2, 2008, Chile’s Chaitén Volcano erupts, blanketing the region in volcanic ash, and releasing plumes of ash and steam for several weeks. In the months that followed, the volcano continued intermittent activity. In early September, Chaitén released another plume. The Moderate Resolution Imaging Spectroradiometer (MODIS) on <a href="http://www.earth.com/video/nasa-captures-a-stars-explosive-encounter-with-a-black-hole/">NASA</a>’s Aqua satellite captured this image on September 3, 2008.
In this image, Chaiten Volcano Erupts the volcanic plume wafts away from the volcanic summit, tracing a vague zigzag pattern toward the northwest. The plume can be distinguished from the nearby clouds thanks to its slightly darker color, caused by volcanic ash mixed with water vapor. Unlike the soft, fluffy ash from burning vegetation, volcanic “ash” really consists of tiny jagged particles of rock and glass.
Chaitén is a caldera volcano formed when the magma chamber beneath a volcano completely empties during an eruption, causing the summit to collapse into it.

The collapse creates a circular depression. Prior to its May 2008 eruption, the volcano had been dormant for more than 9,000 years.Chaitén is a volcanic caldera 3 kilometres (2 mi) in diameter, 17 kilometres (11 mi) west of the elongated ice-capped Michinmahuida volcano and 10 kilometres (6 mi) northeast of the town of Chaitén, near the Gulf of Corcovado in southern <a href="https://en.wikipedia.org/wiki/Chile">Chile</a>. The most recent eruptive phase of the volcano erupted on 2008. Originally, radiocarbon dating of older tephra from the volcano suggested that its last previous eruption was in 7420 BC ± 75 years. However, recent studies have found that the volcano is more active than thought. According to the Global Volcanism Program, its last eruption was in 2011.

Credit: NASA images courtesy Jeff Schmaltz, MODIS Rapid Response Team at NASA GSFC. Caption by Michon Scott.