<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 a wall of dust moving across the Korean Peninsula on April 25, 2024.</p>



<p>As the Northern Hemisphere ushers in the warmth of spring, East Asia grapples with a less welcome sign of the season: colossal <a href="https://www.earth.com/news/dust-storms-in-the-gulf-of-alaska-help-shape-the-global-climate/" target="_blank" rel="noreferrer noopener">dust storms</a>. </p>



<h2 class="wp-block-heading" id="h-desert-dust-reaches-the-korean-peninsula-nbsp">Desert dust reaches the Korean Peninsula&nbsp;</h2>



<p>Originating from the expansive Gobi and Taklamakan deserts, these dust plumes journey across China, reaching as far as the Korean Peninsula and southern Japan, reshaping the springtime landscape both literally and metaphorically.</p>



<p>The phenomenon was starkly illustrated on April 25, 2024, when NASA's Aqua satellite, equipped with the MODIS (Moderate Resolution Imaging Spectroradiometer) sensor, captured a dramatic image of a massive dust wall traversing the Korean Peninsula.&nbsp;</p>



<h2 class="wp-block-heading" id="h-primary-source-of-the-dust-over-korea">Primary source of the dust over Korea</h2>



<p>The imagery from the preceding day, courtesy of South Korea’s GEO-KOMPSAT-2A satellite and NASA’s Terra and Aqua satellites, pinpointed the Gobi Desert in Inner Mongolia as the primary source of this <a href="https://www.earth.com/news/atmospheric-dust-plays-surprisingly-crucial-role-in-stabilizing-ocean-ecosystems/" target="_blank" rel="noreferrer noopener">dust</a>. </p>



<p>Compounding the environmental spectacle, a phytoplankton bloom, partially veiled by the dust, was visible to the east of the Korean Peninsula, presenting a complex interaction of earth and ocean.</p>



<h2 class="wp-block-heading" id="h-where-does-the-dust-go">Where does the dust go?</h2>



<p>This seasonal dust does not simply settle locally but sometimes ascends high into the atmosphere, occasionally soaring above cloud level. This elevation enables the particles to traverse vast distances, including crossing the Pacific Ocean to North America.&nbsp;</p>



<p>However, not all the <a href="https://www.earth.com/news/sahara-desert-dust-storms-carry-harmful-bacteria-and-fungi-around-the-globe/" target="_blank" rel="noreferrer noopener">dust</a> achieves such heights; much remains nearer to the ground, significantly deteriorating air quality in one of the planet's most densely populated areas.</p>



<p>The health implications of these dust storms are profound. Breathing in the fine particulate matter, particularly PM2.5, is linked to severe cardiovascular and respiratory issues.</p>



<h2 class="wp-block-heading" id="h-dust-storms-in-east-asia-nbsp">Dust storms in East Asia&nbsp;</h2>



<p>Dust storms in East Asia are commonly known as yellow dust, Asian dust, yellow wind, or China dust storms. The storms are typically most frequent in spring and can extend into early summer. They arise when strong winds lift large amounts of sand and dust from deserts in China and Mongolia, then transport these particles across the region.</p>



<p>The key factors contributing to these dust storms include:</p>



<h3 class="wp-block-heading" id="h-natural-conditions">Natural conditions</h3>



<p>The Gobi Desert and other arid regions in China and Mongolia are the primary sources of the dust. The natural aridness and loose soil make these areas prone to dust lift-off under certain meteorological conditions.</p>



<h3 class="wp-block-heading" id="h-meteorological-factors">Meteorological factors</h3>



<p>Spring brings about changes in temperature and pressure, which can result in strong winds. These winds are capable of carrying dust over long distances. The occurrence and intensity of these storms are closely linked to weather patterns such as the strength of the Siberian High and the East Asian jet stream.</p>



<h3 class="wp-block-heading" id="h-human-impact">Human impact</h3>



<p>Overgrazing, <a href="https://www.earth.com/news/global-deforestation-crisis-how-can-we-stop-massive-forest-losses/" target="_blank" rel="noreferrer noopener">deforestation</a>, and land degradation have exacerbated the frequency and intensity of dust storms. Human activities have led to increased desertification, which contributes to the severity of the storms.</p>



<p>Efforts to combat these dust storms have included afforestation projects, such as planting trees to stabilize the soil, and sustainable land management practices aimed at reducing <a href="https://www.earth.com/news/oases-grow-by-human-effort-but-face-threats-from-desertification/" target="_blank" rel="noreferrer noopener">desertification</a>. Regional cooperation among affected countries has also been essential in monitoring and managing the impacts of these dust events.</p>



<h2 class="wp-block-heading" id="h-more-about-the-korean-peninsula-nbsp">More about the Korean Peninsula&nbsp;</h2>



<p>The Korean Peninsula extends southward from the eastern end of the Asian continent and is bordered by the Sea of Japan (East Sea) to the east, the Yellow Sea to the west, and the Korea Strait connecting to the East China Sea to the south. It is divided into two distinct sovereign states: North Korea and South Korea.</p>



<h3 class="wp-block-heading" id="h-historical-context">Historical context</h3>



<p>Historically, the Korean Peninsula was unified for much of its history under various kingdoms such as Goguryeo, Silla, Baekje, and later the Goryeo and Joseon dynasties. The last, the Joseon Dynasty, lasted until the early 20th century.&nbsp;</p>



<p>Following the end of World War II in 1945, the peninsula was divided into North and South Korea in 1948 amid growing Cold War tensions, leading to the Korean War from 1950 to 1953, which ended with an armistice but no formal peace treaty.</p>



<h3 class="wp-block-heading" id="h-cultural-aspects-of-north-and-south-korea">Cultural aspects of North and South Korea </h3>



<p>Korean culture is distinguished by its language, customs, and cuisine. Both North and South Korea share cultural foundations based on their Confucian heritage, which influences social etiquette, family relations, and personal conduct. However, decades of separation have fostered distinct societal developments in each country.</p>



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



<p>North Korea has a largely isolated economy with limited engagement with the international community, heavily reliant on its natural resources and some agricultural output.</p>



<p>South Korea boasts the 10th largest economy in the world (as of 2021), with strong industries in electronics, telecommunications, automobile production, shipbuilding, and chemical manufacturing. It is also a leader in technological innovation and infrastructure.</p>



<h3 class="wp-block-heading" id="h-current-issues">Current issues</h3>



<p>The Korean Peninsula continues to face challenges, including security concerns due to North Korea's nuclear ambitions and the ongoing military tensions between the North and South. </p>



<p>Additionally, both countries deal with internal and external economic pressures, global market dynamics, and cultural exportation impacting global perceptions and economic health.</p>



<p>The Korean Peninsula presents a unique study in contrasts, with profound historical ties and shared cultural elements, yet marked differences in political, economic, and social systems.</p>



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



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Massive wall of dust travels over the Korean Peninsula 

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 picturesque wetlands of Spain's Doñana National Park, This vital ecosystem, located in the Andalusia region, has received some long-awaited rainfall after enduring years of severe <a href="https://www.earth.com/news/climate-change-has-made-droughts-20-times-more-likely/" target="_blank" rel="noreferrer noopener">drought</a> conditions. </p>



<p>A significant increase in rainfall in March 2024 brought temporary relief to this UNESCO World Heritage Site and Biosphere Reserve, known for its rich biodiversity and critical role as a Ramsar Wetland of International Importance.</p>



<h2 class="wp-block-heading" id="h-a-decade-of-drought-in-donana-national-park">A decade of drought in Doñana National Park</h2>



<p>For over a decade, Doñana National Park has faced below-average rainfall levels, with the situation worsening significantly in the past three years. These years have recorded some of the lowest annual precipitation totals, compounded by unusually high temperatures across the country.&nbsp;</p>



<p>The effects of <a href="https://www.earth.com/news/drought-to-downpour-climate-change-triggers-extreme-weather-shifts/" target="_blank" rel="noreferrer noopener">climate change</a> were starkly visible in January 2024, which was noted as Spain's warmest January since records began, with temperatures averaging 2.4 degrees Celsius higher than normal.</p>



<p>The first quarter of 2024 continued this trend, potentially marking it as the warmest first quarter since 1961. The prolonged <a href="https://www.earth.com/news/global-drought-crisis-un-warns-of-unprecedented-emergency/" target="_blank" rel="noreferrer noopener">drought</a> has had a devastating impact on the park’s ecosystem, drying up <a href="https://www.earth.com/news/nearly-all-of-the-worlds-salt-marshes-may-be-underwater-by-2100/" target="_blank" rel="noreferrer noopener">marshes</a> and affecting both flora and fauna.</p>



<h2 class="wp-block-heading" id="h-welcome-change-in-the-weather">Welcome change in the weather</h2>



<p>The heavy rains that arrived in late March 2024 have momentarily brought some relief to the region. Satellite images acquired by the OLI on Landsat 8 and the OLI-2 on Landsat 9 showed significant changes in the landscape by April 9, 2024.&nbsp;</p>



<p>The featured image shows that marshes have been replenished and ponds have been temporarily filled, contrasting sharply with the desolate conditions observed just a year earlier.</p>



<p>A weather station in the park recorded 145 millimeters of rainfall in March 2024, making it the second-wettest March on record. Since the start of the water year in September 2023, the area has received over 400 millimeters of rainfall, surpassing the totals of each of the last three full water years. Despite this increase, the precipitation still falls short of the historical yearly average of more than 500 millimeters.</p>



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



<p>The western part of the park is home to thousands of small, shallow pools known as Mediterranean temporary ponds, which naturally experience cycles of flooding and drying. Following the recent rains, several of the largest ponds flooded, as did marsh areas farther inland, though some regions remained dry.</p>



<p>The Doñana Biological Station reported that this influx of water led to a resurgence of vegetation beneficial to breeding waterfowl such as coots, grebes, and herons.&nbsp;</p>



<p>However, despite these positive signs, the challenges remain significant. Development pressures from agricultural fields and an adjacent resort town continue to strain the local aquifer, exacerbating the water scarcity and impacting the wetland's ecological balance.</p>



<h2 class="wp-block-heading" id="h-long-term-concerns-for-donana-national-park">Long-term concerns for Doñana National Park</h2>



<p>Javier Bustamante, a researcher at the Doñana Biological Station, emphasized that while the rainfall has eased some of the immediate drought-related issues, it does not address the deeper problem of groundwater overexploitation.&nbsp;</p>



<p>"The rains have partially alleviated the most immediate drought problems, but they do not solve the invisible problem of groundwater overexploitation," Bustamante stated, highlighting the complex nature of the challenges facing Doñana.</p>



<p>The overall effect of the rainfall will become clearer in the coming months, but experts caution that the changes observed might not signify long-term relief. Conservation efforts continue to focus on managing external pressures and restoring the ecological balance to preserve Doñana National Park for future generations.</p>



<h2 class="wp-block-heading" id="h-more-about-donana-national-park">More about Doñana National Park</h2>



<p>Doñana National Park is one of Europe's most important and diverse natural reserves. This vast park stretches across parts of the provinces of Huelva, Seville, and Cádiz. It was established as a national park in 1969 and covers an area of approximately 543 square kilometers.</p>



<p>The park is celebrated for its extraordinary biodiversity. It serves as a critical stopover, breeding, and wintering site for thousands of European and African migratory birds.&nbsp;</p>



<p>Doñana's complex ecosystem includes <a href="https://www.earth.com/news/coastal-wetlands-are-inching-closer-to-extinction-as-the-world-heats-up/" target="_blank" rel="noreferrer noopener">marshlands</a>, shallow streams, and sand dunes, providing habitat for a wide variety of plant and animal species. Among its notable inhabitants are the Iberian lynx and the Spanish imperial eagle, both of which are endangered species.</p>



<p>Doñana also has a rich cultural heritage; it has been influenced by various civilizations throughout history, including the Romans and Moors. This history is reflected in the archaeological sites found within its boundaries, including the remains of the town of La Algaida.</p>



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



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Doñana National Park gets temporary relief from drought

<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

<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>Mata mata turtles can also grow to an extraordinary size. According to Smithsonian’s National Zoo &amp; Conservation Biology Institute, its shells can reach up to 1.5 feet across, and some of them have been known to weigh almost 40 pounds. For context, that’s approximately the same weight as an average four-year-old child. Photo Credit: Daniel Hernanz Ramos/Getty Images</p>

They Get Huge

<p>In the vast expanse of the universe, galaxies paint a breathtaking picture across the cosmic canvas. Among these celestial wonders, one galaxy stands out with its magnificent central bar and tightly wound spiral arms: NGC 2217.</p>



<p>Recently, the NASA/ESA <a href="https://science.nasa.gov/mission/hubble/" target="_blank" rel="noreferrer noopener">Hubble Space Telescope</a> captured a stunning image of NGC 2217, also known as AM 0619-271, in the constellation of Canis Major (The Greater Dog). </p>



<p>The barred spiral galaxy, roughly 65 million light-years from Earth, spans an impressive 100,000 light-years across, making it similar in size to our own <a href="https://www.earth.com/news/galaxies-like-our-own-milky-way-are-not-unique/" target="_blank" rel="noreferrer noopener">Milky Way</a>.</p>



<h2 class="wp-block-heading" id="h-the-luminous-heart-of-ngc-2217">The luminous heart of NGC 2217</h2>



<p>At the heart of NGC 2217 lies a luminous bar, where countless stars congregate, forming a brilliant central region. This bar plays a crucial role in the galaxy's evolution, acting as a cosmic funnel that channels gas from the disk into the core.</p>



<p>Dr. Emily Thompson, an astrophysicist at the <a href="https://www.cam.ac.uk/" target="_blank" rel="noreferrer noopener">University of Cambridge</a>, explains, "The central bar in galaxies like NGC 2217 is essential for their growth and development. It helps transport gas and dust to the center, where new stars can form or feed the supermassive black hole residing there."</p>



<h2 class="wp-block-heading">Nature of supermassive black holes</h2>



<p><a href="https://www.earth.com/news/largest-map-of-supermassive-black-holes-unveiled/" target="_blank" rel="noreferrer noopener">Supermassive black holes</a>, with masses ranging from millions to billions of times that of our Sun, reside at the center of most, if not all, large galaxies. </p>



<p>These cosmic behemoths, like the one growing at the heart of galaxy NGC 2217, exert an immense gravitational influence on their surroundings, shaping the structure and evolution of their host galaxies.</p>



<h3 class="wp-block-heading">Formation and growth</h3>



<p>The exact formation mechanism of supermassive black holes remains a topic of ongoing research. Scientists propose several theories, including the collapse of massive gas clouds in the early universe, the merging of <a href="https://www.earth.com/news/small-black-hole-disrupts-a-bigger-one-causing-cosmic-hiccups/" target="_blank" rel="noreferrer noopener">smaller black holes</a>, and the rapid accumulation of matter through accretion.</p>



<p>Supermassive black holes grow by consuming gas, dust, and stars that venture too close. As matter spirals towards the black hole, it forms an accretion disk, where friction and gravitational forces heat the material to extreme temperatures, causing it to emit intense radiation across the electromagnetic spectrum.</p>



<h3 class="wp-block-heading">Influence on galactic evolution</h3>



<p>Supermassive black holes play a crucial role in the evolution of galaxies. The energy released by the accretion process can trigger powerful outflows and jets, which can regulate star formation and shape the distribution of gas and dust within the galaxy.</p>



<p>In some cases, the feedback from supermassive black holes can quench star formation by heating and <a href="https://www.earth.com/news/supermassive-black-holes-are-very-messy-eaters/" target="_blank" rel="noreferrer noopener">expelling gas from the galaxy</a>. Conversely, the outflows can also compress gas clouds, triggering the birth of new stars in other regions.</p>



<p>"The interplay between the central bar, the inflowing gas, and the supermassive black hole is a complex and fascinating process," adds Dr. Thompson. "By studying galaxies like NGC 2217, we can gain a better understanding of how these cosmic giants evolve over time."</p>



<h2 class="wp-block-heading" id="h-colorful-collaboration">Colorful collaboration</h2>



<p>The stunning image of NGC 2217 was colorized using data from the Panoramic Survey Telescope and Rapid Response System (<a href="https://www2.ifa.hawaii.edu/research/Pan-STARRS.shtml" target="_blank" rel="noreferrer noopener">Pan-STARRS</a>). </p>



<p>This collaborative effort showcases the power of combining data from various astronomical instruments to create a more comprehensive picture of the universe.</p>



<p>Dr. Michael Johnson, a researcher at the Harvard-Smithsonian Center for Astrophysics (<a href="https://www.cfa.harvard.edu/" target="_blank" rel="noreferrer noopener">CfA</a>), emphasizes the importance of such collaborations. </p>



<p>"By combining data from the Hubble Space Telescope and Pan-STARRS, we can unlock new insights into the structure and composition of galaxies like NGC 2217. This synergy between telescopes allows us to push the boundaries of our understanding of the cosmos," Johnson enthused.</p>



<h2 class="wp-block-heading" id="h-ngc-2217-an-inspirational-window-to-the-cosmos">NGC 2217: An inspirational window to the cosmos</h2>



<p>As we gaze upon the magnificent central bar and tightly wound spiral arms of NGC 2217, we are reminded of the awe-inspiring beauty and complexity of the universe. </p>



<p>Through the lens of the Hubble Space Telescope and the collaborative efforts of astronomers worldwide, we continue to unravel the secrets of these cosmic masterpieces, one galaxy at a time.</p>



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Hubble captures another cosmic masterpiece in galaxy NGC 2217

In the vast expanse of the universe, galaxies paint a...

<p>A team of researchers led by the Institute for <a href="https://cmcm.ibs.re.kr/" target="_blank" rel="noreferrer noopener">Basic Science Center for Multidimensional Carbon Material</a> (CMCM) in Korea has recently developed a method to produce lab-grown <a href="https://www.earth.com/news/ancient-diamonds-may-hold-the-key-to-life-on-earth/" target="_blank" rel="noreferrer noopener">diamonds</a> in just 150 minutes, offering a cost-effective and environmentally friendly alternative to natural diamonds. </p>



<h2 class="wp-block-heading" id="h-diamonds-at-a-fraction-of-the-cost">Diamonds at a fraction of the cost</h2>



<p>The lab-created diamonds are indistinguishable to the naked eye from their natural counterparts, but they exhibit significant differences under a microscope, which contributes to their substantially lower price.</p>



<p>While natural diamonds take billions of years to form, lab-grown diamonds can be produced quickly and at a fraction of the cost. For example, in the US, a one-carat princess-cut diamond costs an average of $2,500, whereas a comparable lab-grown diamond is priced at just $500.&nbsp;</p>



<h2 class="wp-block-heading" id="h-structure-of-lab-grown-diamonds-nbsp">Structure of lab-grown diamonds&nbsp;</h2>



<p>The process involves mixing silicon with liquid metals such as gallium, iron, and nickel in a crucible and heating it to 1,877 degrees Fahrenheit. The mixture is then exposed to <a href="https://www.earth.com/news/methane-emissions-are-higher-than-previously-estimated/" target="_blank" rel="noreferrer noopener">methane</a> and hydrogen gasses, which dissolve into carbon gas that combines with the silicon, prompting the carbon atoms to bond together and form small diamond crystals.</p>



<p>Senior author Rodney Ruoff emphasized the crucial role of silicon in this synthetic process. “If we don't add some silicon, we don't get diamonds,” he explained. Moreover, the researchers found that diamond formation continues to progress over time, with the full structure forming at 150 minutes.</p>



<h2 class="wp-block-heading" id="h-expanding-lab-grown-diamond-industry">Expanding lab-grown diamond industry</h2>



<p>Despite this breakthrough, the diamonds produced are still only about 100 nanometers across, roughly the size of a typical virus. However, Ruoff is optimistic about the future of this technology. “A lot of labs around the world are going to start cooking things up,” he said, predicting that this could revolutionize the already expanding lab-grown <a href="https://www.earth.com/news/revolutionary-process-turns-carbon-emissions-into-diamonds/" target="_blank" rel="noreferrer noopener">diamond industry</a>.</p>



<p>The lab-grown diamond market has experienced rapid growth, increasing from less than one percent of global diamond sales in 2015 to approximately 20 percent by the end of last year.&nbsp;</p>



<h2 class="wp-block-heading" id="h-lower-cost-of-lab-grown-diamonds-nbsp">Lower cost of lab-grown diamonds&nbsp;</h2>



<p>This surge is primarily due to their lower cost. For example, a two-carat lab-grown diamond costs about $1,000, much less than the $13,000 to $14,000 price range for a similar natural diamond.</p>



<p>“Prices of lab-grown diamonds are falling. The reason is because of simple supply and demand. So many manufacturers are coming out and flooding the market with them, which is causing prices to dive,” said Mehul Sompura, CEO of <a href="https://www.diamondhedge.com/%C3%B9" target="_blank" rel="noreferrer noopener">Diamond Hedge</a>. “For the most part, it's difficult to distinguish between the two, but it has to do with impurities, and with a microscope you can see growth patterns. You won't get your money back, that's the main problem.”</p>



<h2 class="wp-block-heading" id="h-sustainable-alternative-to-blood-diamonds">Sustainable alternative to blood diamonds</h2>



<p>Lab-grown diamonds also offer a sustainable alternative to blood diamonds - diamonds mined in war zones and sold to finance an invading army's war efforts, an insurgency, terrorism, or a warlord's activity -  and can reduce the environmental impact associated with traditional diamond mining. For every carat of diamond mined, nearly 100 square feet of land is affected and 5,798 pounds of mineral <a href="https://www.earth.com/news/microbes-can-be-used-to-store-carbon-and-reuse-mining-waste/" target="_blank" rel="noreferrer noopener">waste</a> is created.</p>



<p>“Diamonds are very ingrained in our culture. I think, as humans, we just desire these rare, precious gemstones and metals. It's not practical, but it makes us feel good,” concluded Paul Zimnisky, a leading diamond industry analyst.</p>



<h2 class="wp-block-heading" id="h-more-about-diamonds-nbsp">More about diamonds&nbsp;</h2>



<p>Diamonds, often celebrated for their brilliance and durability, are one of the hardest natural substances found on Earth, making them highly sought after for jewelry and industrial applications. They form under high-pressure, high-temperature conditions existing deep within the Earth's mantle, from where they are brought closer to the surface through volcanic eruptions. The process can take between 1 to 3.3 billion years.</p>



<p>The allure of diamonds is not just in their sparkle but also in their rarity, which makes them symbols of wealth and status. Each diamond is unique, with characteristics such as cut, color, clarity, and carat weight determining its value.&nbsp;</p>



<p>The cut of a diamond affects its ability to reflect light, enhancing its visual properties, while the clarity refers to the presence of internal inclusions or external blemishes. The <a href="https://www.earth.com/news/pink-diamonds-were-formed-when-supercontinent-nuna-broke-up/" target="_blank" rel="noreferrer noopener">color</a> can range from colorless to light yellow and brown, with truly colorless diamonds being the rarest and most valuable.</p>



<p>The mining and distribution of diamonds have been associated with conflict and ethical concerns, leading to initiatives like the Kimberley Process, which aims to prevent "conflict diamonds" from entering the market.</p>



<p>The study is published in the journal <a href="https://www.nature.com/articles/s41586-024-07339-7" target="_blank" rel="noreferrer noopener"><em>Nature</em></a><em>.</em></p>



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Diamonds can be grown in a lab in less than 3 hours

A team of researchers led by the Institute for Basic...

The,Wood,Frog,,Lithobates,Sylvaticus,Or,Rana,Sylvatica.,Adult,Wood

<p>We all know evolution is a slow and steady process, unfolding over ages. But, some species could evolve in a few decades…thanks to something as simple as road salt. That's precisely what the fascinating research of Rick Relyea, Ph.D., and his team at Rensselaer Polytechnic Institute (<a href="https://www.rpi.edu" target="_blank" rel="noreferrer noopener">RPI</a>) has uncovered, specifically in the case of wood <a href="https://www.earth.com/news/climate-change-makes-wood-frogs-more-vulnerable-to-salt-pollution/" target="_blank" rel="noreferrer noopener">frogs</a>.</p>



<h2 class="wp-block-heading" id="h-amphibians-salt-pollution-and-the-need-for-speed">Amphibians, salt pollution, and the need for speed</h2>



<p>Amphibians, like <a href="https://www.earth.com/news/help-frogs-cutting-toes/" target="_blank" rel="noreferrer noopener">frogs</a>, are particularly sensitive to changes in their environment because they have porous skin. Road salt (the stuff dumped on roads to melt ice) might seem harmless, but it dramatically alters the chemistry of water – especially in wetlands where amphibians hang out. </p>



<p>"When salt drains into fresh water, it can kill animals, stunt the growth of fish, cause sex changes in frogs, and make animals more prone to diseases," Relyea said.</p>



<p>Amphibians are like environmental alarm bells. They are indicators of an ecosystem's health, and when they're struggling, it usually means bad news for everyone else, including us humans.</p>



<h2 class="wp-block-heading" id="h-rapid-evolution-of-wood-frogs">Rapid evolution of wood frogs</h2>



<p>The research team sought to determine if wood <a href="https://www.earth.com/news/world-frog-day-addressing-environmental-threats-to-frogs/" target="_blank" rel="noreferrer noopener">frogs</a> (<em>Rana sylvatica</em>) were exhibiting evolutionary adaptations in response to rising salt pollution. To investigate this, they collected wood frog eggs from wetlands with varying environmental conditions. </p>



<p>These included wetlands adjacent to roadways with differing levels of salt contamination, as well as wetlands in pristine, undisturbed areas.</p>



<p>The findings were striking. Tadpoles originating from wetlands near roadways with high salt levels demonstrated a significantly elevated tolerance for salt exposure when compared to tadpoles from pristine wetlands. </p>



<p>This suggests that, in a remarkably short timeframe of approximately 25 years (about 10 frog generations), these wood frogs have undergone evolutionary adaptations in response to the human-induced increase in environmental salinity.</p>



<p>"We've been applying de-icing salts to reduce car accidents in snowy and icy conditions in the United States for 80 years, and we currently apply four times more road salt than in the 1970s." explained Relyea.</p>



<h2 class="wp-block-heading">Wood frogs are masters of survival</h2>



<p>This resilient frog species inhabits a wide range of forests across North America, from the <a href="https://www.earth.com/news/single-degree-temperature-warming-boreal-forests-wreak-havoc/" target="_blank" rel="noreferrer noopener">boreal forests</a> of Alaska and Canada to the deciduous woodlands of the eastern United States. These adaptable amphibians thrive in moist environments near vernal pools, bogs, and streams.</p>



<p>Wood frogs possess an extraordinary ability to survive harsh winter conditions. As temperatures drop, they produce high levels of glucose and urea in their tissues, which act as natural antifreeze. </p>



<p>This adaptation allows them to endure freezing up to 65% of their body water, enabling them to hibernate under leaf litter and emerge unscathed in the spring.</p>



<h3 class="wp-block-heading">Life cycle and ecological importance</h3>



<p>Male wood frogs gather in vernal pools and wetlands during early spring, forming large choruses to attract females. After mating, females lay clusters of eggs, which hatch into tadpoles within a few weeks. The tadpoles metamorphose into froglets by summer, leaving the water to explore their terrestrial habitat.</p>



<p>Wood frogs play a crucial role in <a href="https://www.earth.com/news/complex-canopies-help-forests-recover-from-disturbances/">forest e</a><a href="https://www.earth.com/news/complex-canopies-help-forests-recover-from-disturbances/" target="_blank" rel="noreferrer noopener">c</a><a href="https://www.earth.com/news/complex-canopies-help-forests-recover-from-disturbances/">osystems</a>, serving as both predators and prey. They consume a variety of insects, spiders, and other small invertebrates, helping to control pest populations. </p>



<p>In turn, they provide a food source for various predators, such as snakes, birds, and mammals, contributing to the overall balance of the ecosystem.</p>



<h3 class="wp-block-heading" id="h-conservation-and-threats">Conservation and threats</h3>



<p>Although wood frogs are currently not considered endangered, they face several threats, including habitat loss, climate change, and pollution. </p>



<p>The preservation of vernal pools and surrounding forests is essential for the long-term survival of these remarkable <a href="https://www.earth.com/news/amphibians-threatened-by-mercury-with-unknown-health-impacts/" target="_blank" rel="noreferrer noopener">amphibians</a>, ensuring that future generations can witness their incredible adaptations and ecological importance.</p>



<h2 class="wp-block-heading" id="h-problem-behind-wood-frog-evolution">Problem behind wood frog evolution</h2>



<p>While this particular observed adaptation in wood <a href="https://www.earth.com/news/tree-frogs-live-in-trees-but-lay-eggs-on-the-ground/" target="_blank" rel="noreferrer noopener">frogs</a> offers a degree of optimism in the face of human-caused environmental change, it's crucial to acknowledge the inherent limitations of evolutionary processes. </p>



<p>Evolutionary adaptation takes time and relies on existing genetic variation within a population. Rapid environmental changes can outpace the speed of natural selection.</p>



<p>The frogs' ability to adapt does not mean that we should expect them to survive if salt levels increase even more. If the pace and intensity of <a href="https://www.earth.com/news/salt-pollution-threatens-freshwater-ecosystems/" target="_blank" rel="noreferrer noopener">salt pollution</a> continues to escalate, it could overwhelm the wood frogs' adaptive capacity, ultimately leading to population decline or even extinction. </p>



<p>This underscores the importance of recognizing the boundaries of adaptation and the crucial need to take proactive steps in mitigating the sources of environmental stress.</p>



<h2 class="wp-block-heading" id="h-it-s-not-just-about-wood-frogs">It's not just about wood frogs</h2>



<p>This unexpected, rapid evolution of wood frogs serves as a potent reminder that our actions often trigger a cascade of unintended consequences within the natural world. </p>



<p>Seemingly minor interventions can disrupt the intricate balance of ecosystems, leading to far-reaching and potentially unforeseen repercussions.</p>



<p>"The effects of human activity on our environment must be understood and mitigated," Relyea emphasizes. We have a responsibility to recognize the interconnectedness of species and ecosystems, and to minimize the negative impact of our activities on the delicate equilibrium that sustains life.</p>



<h2 class="wp-block-heading" id="h-potential-solutions">Potential solutions</h2>



<p>The good news is that solutions exist. "Fortunately, cities and towns around the country are learning how they can apply less salt with the same level of safety, by applying it in smarter ways," Relyea asserts. </p>



<p>"Everyone across the political spectrum can agree to this win-win proposition: we can apply less salt and protect the environment, while maintaining safe roads and saving money for governments and taxpayers," she concluded.</p>



<p>The observation highlights that finding a balance between human needs and environmental protection is achievable. Proactive adoption of more sustainable practices offers a path toward positive change.</p>



<p>Wood frogs have surprisingly adapted to high salt levels. This adaptation is a powerful example of evolution in action. It also reminds us of the significant impact humans have on the environment. </p>



<p>This rapid change is promising but emphasizes the need for smarter, eco-friendly solutions. We must consider how we interact with our planet more carefully.</p>



<p>The study is published in the journal <em><a href="https://onlinelibrary.wiley.com/doi/10.1002/ece3.11069" target="_blank" rel="noreferrer noopener">Ecology and Evolution</a></em>.</p>



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



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Wood frogs achieved significant biological evolution in just 25 years

We all know evolution is a slow and steady process,...

<p>Robotics engineers have worked for decades, using substantial funding, to create <a href="https://www.earth.com/news/how-will-humans-react-to-coexisting-with-robots/" target="_blank" rel="noreferrer noopener">robots</a> that can walk or run with the ease of animals. </p>



<p>Despite these efforts, today's robots still cannot match the natural <a href="https://www.earth.com/news/what-determines-the-maximum-running-speed-of-animals/">abilities</a> of many animals in terms of endurance, agility, and robustness.</p>



<h2 class="wp-block-heading" id="h-amazing-movement-of-animals">Amazing movement of animals</h2>



<p>“A wildebeest can migrate for thousands of kilometers over rough terrain, a mountain goat can climb up a literal cliff, finding footholds that don't even seem to be there, and cockroaches can lose a leg and not slow down,” said study senior author Max Donelan from <a href="https://www.sfu.ca/" target="_blank" rel="noreferrer noopener">Simon Fraser University</a>'s Department of Biomedical Physiology and Kinesiology. “We have no robots capable of anything like this endurance, agility, and robustness.”</p>



<p>Seeking to understand and quantify this disparity, an interdisciplinary team of scientists and engineers from top research institutions conducted a comprehensive study to compare various aspects of robotic systems designed for running with their biological counterparts.&nbsp;</p>



<h2 class="wp-block-heading" id="h-animal-versus-machine">Animal versus machine</h2>



<p>Surprisingly, the researchers found that biological components generally underperformed compared to engineered parts on specific metrics. However, where animals significantly outshine robots is in the seamless integration and control of these components.</p>



<p>The study was a collaborative effort involving Sam Burden from the <a href="https://www.washington.edu/" target="_blank" rel="noreferrer noopener">University of Washington</a>, Tom Libby from <a href="https://www.sri.com/" target="_blank" rel="noreferrer noopener">SRI International</a>, Kaushik Jayaram from the <a href="https://www.colorado.edu/" target="_blank" rel="noreferrer noopener">University of Colorado Boulder</a>, and Simon Sponberg from the <a href="https://www.gatech.edu/" target="_blank" rel="noreferrer noopener">Georgia Institute of Technology</a>. </p>



<p>Each researcher focused on different "subsystems" critical to running robots - Power, Frame, Actuation, Sensing, and Control - and assessed them against their natural equivalents.</p>



<h2 class="wp-block-heading" id="h-robots-are-still-no-match-for-animals">Robots are still no match for animals</h2>



<p>Contrary to prior assumptions that biological superiority explained animals' edge over robots, the findings revealed that, with few exceptions, the engineered subsystems frequently outperformed their biological counterparts.&nbsp;</p>



<p>“The way things turned out is that, with only minor exceptions, the engineering subsystems outperform the biological equivalents – and sometimes radically outperformed them,” Libby said.&nbsp;</p>



<p>“But also what's very, very clear is that, if you compare animals to robots at the whole system level, in terms of movement, animals are amazing. And robots have yet to catch up.”</p>



<h2 class="wp-block-heading" id="h-robots-evolve-faster-than-animals">Robots evolve faster than animals</h2>



<p>The research team remains optimistic about the future of robotics, noting the <a href="https://www.earth.com/news/robots-can-now-learn-to-accomplish-any-task-by-watching-videos-or-observing-people/" target="_blank" rel="noreferrer noopener">rapid progress</a> made in a relatively short time compared to the millions of years over which animals have evolved. </p>



<p>Dr. Burden highlights the advantage of directed design in robotics over natural <a href="https://www.earth.com/news/evolution-is-not-as-random-as-we-thought/" target="_blank" rel="noreferrer noopener">evolution</a>: “It will move faster, because evolution is undirected,” he says. “Whereas we can very much correct how we design robots and learn something in one robot and download it into every other robot, biology doesn't have that option.”</p>



<p>“So there are ways that we can move much more quickly when we engineer robots than we can through evolution – but evolution has a massive head start.”</p>



<h2 class="wp-block-heading" id="h-potential-applications-for-running-robots-nbsp">Potential applications for running robots&nbsp;</h2>



<p>The potential applications for efficient running <a href="https://www.earth.com/news/robots-can-now-learn-to-accomplish-any-task-by-watching-videos-or-observing-people/" target="_blank" rel="noreferrer noopener">robots</a> are vast, ranging from solving “last mile” delivery challenges to performing tasks in hazardous environments.</p>



<p>Looking forward, the researchers aim to focus not merely on developing better hardware but on improving how existing hardware is integrated and controlled.&nbsp;</p>



<p>“As engineering learns integration principles from biology, running robots will become as efficient, agile, and robust as their biological counterparts,” Donelan concluded.</p>



<h2 class="wp-block-heading" id="h-animals-that-have-inspired-robots">Animals that have inspired robots</h2>



<p>Many animals have inspired the design and function of <a href="https://www.earth.com/news/tiny-crab-robot-is-smaller-than-a-flea/" target="_blank" rel="noreferrer noopener">robots</a>, thanks to their unique abilities and adaptations. Here are a few notable examples:</p>



<h3 class="wp-block-heading" id="h-insects">Insects</h3>



<p>Swarm robots are small robots that collaborate in large numbers to accomplish tasks, much like how insects work together in colonies.</p>



<h3 class="wp-block-heading" id="h-spiders">Spiders</h3>



<p>The movements and mechanics of spiders have inspired the creation of multi-legged robots, which are useful in navigating rough terrain or in performing complex, coordinated tasks.</p>



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



<p>Snake robots can maneuver through tightly confined spaces and are used in rescue operations, medical procedures, and inspection tasks in complex environments like collapsed buildings or inside machinery.</p>



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



<p>Robots that mimic the ability of geckos to climb smooth surfaces have been developed using synthetic adhesives that replicate gecko footpads.</p>



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



<p>The flight of birds has influenced the design of aerial robots or drones, which mimic the flapping and soaring of wings to improve maneuverability and energy efficiency.</p>



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



<p><a href="https://www.earth.com/news/biohybrid-jellyfish-robotics-ocean-exploration/" target="_blank" rel="noreferrer noopener">Robotic fish</a> are designed to swim efficiently through water, used for underwater exploration, surveillance, and studying aquatic life without disturbing natural habitats.</p>



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



<p>Quadruped robots, such as Boston Dynamics' Spot, mimic the movement of animals like dogs and are used for tasks ranging from industrial inspection to search and rescue operations.</p>



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



<p>The high-speed running of cheetahs has inspired the development of robots that can move quickly over land, potentially for military use or emergency response.</p>



<p>The study is published in the journal <a href="http://dx.doi.org/10.1126/scirobotics.adi9754" target="_blank" rel="noreferrer noopener"><em>Science Robotics</em></a>.</p>



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Robots cannot outrun animals, but they're evolving faster

Robotics engineers have worked for decades, using substantial funding, to...

Plastic,Boxes,With,Pre-packaged,Vegetable,Salads,,Put,Up,For,Sale

<p>We use plastic wrap, containers, and <a href="https://www.earth.com/news/who-is-responsible-for-the-burden-of-plastic-packaging-waste/" target="_blank" rel="noreferrer noopener">packaging</a> all the time. It's convenient, affordable, and seemingly everywhere. Recent research by the Norwegian University of Science and Technology (<a href="https://www.ntnu.edu" target="_blank" rel="noreferrer noopener">NTNU</a>) reveals a shocking truth: our plastic food packaging harbors thousands of different chemicals that may pose significant health risks.</p>



<h2 class="wp-block-heading" id="h-chemicals-in-plastic-food-packaging">Chemicals in plastic food packaging</h2>



<p>Scientists uncovered a staggering 9,936 different chemicals within a single plastic product used to package food. This finding underscores the vast gaps in our understanding of the precise chemical makeup of everyday plastic items and their potential impacts on our well-being.</p>



<p>"Plastic is a very complex material that can contain many different chemicals, some of which can be harmful. This is also true for plastic food packaging,"&nbsp;says Martin Wagner, an NTNU professor who specializes in plastic chemicals.</p>



<h2 class="wp-block-heading" id="h-consequences-of-plastic-food-packaging">Consequences of plastic food packaging</h2>



<p>Many of the chemicals identified in <a href="https://www.earth.com/news/plastic-containers-may-release-forever-chemicals-into-food/" target="_blank" rel="noreferrer noopener">plastic</a> food packaging are not just passive elements; they actively disrupt crucial bodily functions. These disruptions can have profound and potentially long-term health effects.</p>



<h3 class="wp-block-heading">Messing with the metabolism</h3>



<p>Metabolism is essentially your body's engine. It converts the food you eat into energy, fuels cellular processes, and regulates how nutrients are stored and used. </p>



<p>This complex system is finely tuned, ensuring that your body functions efficiently. However, chemicals leached from <a href="https://www.earth.com/news/new-packaging-food-waste/" target="_blank" rel="noreferrer noopener">plastic</a> food packaging can interfere with this system. </p>



<p>For example, certain chemicals can mimic or block natural hormonal signals that control metabolism. This interference can lead to a decrease in metabolic efficiency, impacting energy levels, weight management, and overall health. </p>



<p>The disruption can also affect how your body processes vitamins and minerals, potentially leading to nutritional deficiencies.</p>



<h3 class="wp-block-heading">Hormonal havoc</h3>



<p>Hormones play a pivotal role in regulating virtually every bodily function, including growth, development, metabolism, and mood. They act as messengers, sending signals throughout the body to sustain balance and respond to environmental changes. </p>



<p>The chemicals found in plastic packaging, however, can disrupt this delicate balance. Some chemicals act as endocrine disruptors, which means they can mimic or inhibit natural hormones. </p>



<p>When these chemicals enter the body, they can bind to hormone receptors, block natural hormonal messages, or alter the normal production of hormones. </p>



<p>This disruption can lead to a multitude of health issues, ranging from developmental problems and reproductive issues to immune system dysfunctions and behavioral changes.</p>



<p>"In most of these <a href="https://www.earth.com/video/edible-biodegradable-food-packaging/" target="_blank" rel="noreferrer noopener">plastic</a> products, we found chemicals that can affect the secretion of hormones and metabolism," says Wagner.</p>



<h2 class="wp-block-heading" id="h-but-isn-t-plastic-inert">But isn't plastic inert?</h2>



<p>You might think that plastic is harmless – it's just a chemically neutral substance. However, as shown in another recent NTNU study, scientists found that several combinations of plastic chemicals can affect how your body sends and receives signals.</p>



<p>This finding suggests that plastic's impact goes beyond simple containment of goods. Instead, it actively engages with biological processes, potentially leading to a cascade of unwanted effects. </p>



<p>The implication here is stark: plastic, far from being chemically neutral, carries a variety of active compounds that can interfere with our body's most fundamental operations.</p>



<h2 class="wp-block-heading" id="h-what-can-we-do">What can we do?</h2>



<p>While the discovery of harmful chemicals in plastic food packaging is indeed concerning, it's important to remember that you have the power to make choices that reduce your exposure and improve your overall health.</p>



<h3 class="wp-block-heading">Choosing safer alternatives</h3>



<p>Glass or steel containers are considered to be the safest bet. These materials are inert, meaning they do not react with the foods stored inside them. </p>



<p>Glass and steel are durable, reusable, and free from the chemicals typically found in plastics. Using glass or stainless steel containers for everyday food storage and meal prep can significantly decrease your exposure to potentially harmful chemicals.</p>



<h3 class="wp-block-heading">Avoid heating food in plastic</h3>



<p>When plastic is heated, whether in a microwave or by other means, it increases the likelihood of chemical leaching. To avoid this risk, never use plastic containers for heating food in the microwave. Instead, transfer food to glass or ceramic containers that are designed to withstand high temperatures.</p>



<h3 class="wp-block-heading">Be informed and vigilant</h3>



<p>Start by familiarizing yourself with the materials used in the products you buy. Look specifically for products labeled "BPA-free". </p>



<p><a href="https://www.earth.com/news/common-plastic-items-pose-a-hidden-risk-to-childrens-gut-health/" target="_blank" rel="noreferrer noopener">Bisphenol A (BPA)</a> is one of the better-known chemicals that can leach from plastics and has been linked to various health issues, including hormonal disruptions and increased risk of cancer. </p>



<p>While BPA-free products are a safer choice, they may still contain other harmful chemicals, so continued caution and a push for broader safety testing and transparency in labeling are essential.</p>



<p>Taking these steps can significantly reduce your personal and family's exposure to harmful chemicals found in plastic products. </p>



<p>While broader change in how plastics are manufactured must come from industry and legislation, individual actions can collectively lead to greater demand for safer products and ultimately drive change in production practices.</p>



<h2 class="wp-block-heading" id="h-a-call-for-safer-plastics">A call for safer plastics</h2>



<p>Martin Wagner and his team believe the problem isn't plastic itself, but the chemicals added to it. With more research on exactly which chemicals pose the biggest threats, we may one day have plastic packaging that's completely safe – a win for both our health and the environment.</p>



<p>While we still don't know the long-term effects of constant exposure to these chemicals, scientists at NTNU believe that now is the time to overhaul our plastic manufacturing.</p>



<p>"These and previous findings show that plastic exposes us to toxic chemicals. They support the theory that we need to redesign plastic to make it safer," states Wagner.</p>



<p>The study is published in the journal <em><a href="https://pubs.acs.org/doi/10.1021/acs.est.3c08250" target="_blank" rel="noreferrer noopener">Environmental Science &amp; Technology</a></em>.</p>



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9936 chemicals found in plastic products used for food packaging

We use plastic wrap, containers, and packaging all the time....

<p>Spring invites us to witness the spectacle of bird migrations. But have you ever wondered how <a href="https://www.earth.com/news/bird-flocks-social-relationships/" target="_blank" rel="noreferrer noopener">birds</a> manage such precise, collective movement? A recent study from New York University (<a href="https://www.nyu.edu" target="_blank" rel="noreferrer noopener">NYU</a>) offers fascinating insights into bird flocking and their aerodynamic mystery.</p>



<h2 class="wp-block-heading" id="h-bird-flocking-aerodynamics">Bird flocking aerodynamics</h2>



<p>A team of mathematicians has recently illuminated the dynamics behind large, swirling flocks of birds. The research reveals that birds heavily depend on aerodynamics - the science of air movement around objects - to coordinate their seemingly effortless flight. </p>



<p>Each <a href="https://www.earth.com/news/birds-lead-flock-strongest-flyers/" target="_blank" rel="noreferrer noopener">bird</a> functions as a compact, feathery powerhouse. Its wings do more than propel it forward; they also generate swirling air currents. These currents are crucial, as they enable birds to manipulate the airspace around them. This manipulation forms the intricate patterns and synchronized movements observed in flocks.</p>



<h2 class="wp-block-heading" id="h-invisible-springs">Invisible springs</h2>



<p>The scientists found that the air currents generated by <a href="https://www.earth.com/news/how-birds-brains-evolved-to-enable-them-to-fly/" target="_blank" rel="noreferrer noopener">birds</a> are not random. They interact with each other in a highly organized manner. These interactions, which resemble the behavior of springs, create a network of unseen forces that link neighboring birds. </p>



<p>The network helps maintain the positions of birds within the <a href="https://www.earth.com/news/mixed-species-foraging-flocks/" target="_blank" rel="noreferrer noopener">flock</a>. If birds drift from their spots, the interactive forces pull them back into place. This contributes to the overall stability and structure of the formation.</p>



<p>"If a flyer is displaced from its position, the vortices or swirls of flow left by the leading neighbor helps to push the follower back into place and hold it there," explained Leif Ristroph, a co-author of the study.</p>



<h2 class="wp-block-heading" id="h-small-bird-flocks">Small bird flocks</h2>



<p>While these helpful air currents create a beautiful order in small groups of birds, the system breaks down as the <a href="https://www.earth.com/news/birds-blend-in-to-adapt-to-diverse-environments/" target="_blank" rel="noreferrer noopener">flock</a> size increases. In larger flocks, the individual air currents from many birds start to clash and interfere with one another. This disruption weakens the stabilizing "spring" forces. </p>



<p>As a result, the formation becomes chaotic. Imagine lots of swirling forces bumping into each other. This leads to a loss of the organized structure seen in smaller flocks.</p>



<p>"The very long groups seen in some types of birds are not at all easy to form, and the later members likely have to constantly work to hold their positions and avoid crashing into their neighbors," explained Ristroph.</p>



<h2 class="wp-block-heading" id="h-flonons">Flonons</h2>



<p>When a large flock is overwhelmed by these clashing air currents, the disruption doesn't hit all the birds at once. Instead, the scientists observed a ripple effect – the disorganized movement started with certain birds and then spread throughout the rest of the flock in a wave-like pattern. </p>



<p>This chain reaction of jostling within the flock is a unique scientific phenomenon, and the researchers have given it a catchy name: "flonons." This term might become a new addition to our science vocabulary, especially as we learn more about the fascinating world of animal movement.</p>



<h2 class="wp-block-heading" id="h-broader-significance">Broader significance</h2>



<p>The discovery of how birds flock reveals more than just the remarkable abilities of these creatures; it has significant potential implications for human-designed systems and technologies. </p>



<p>The insights from studying aerodynamic interactions in bird flocks can enhance machine design. These insights could lead to more efficient, aerodynamically optimized machines. Possible improvements include better vehicle formation dynamics. </p>



<p>This would reduce drag and lower energy consumption. There could also be advancements in deploying autonomous drones that need to operate effectively in swarms.</p>



<p>Additionally, the principles of bird flocking could enhance the design of wind turbines, optimizing them for better energy capture based on how air flows naturally around objects in motion. This research bridges the gap between natural phenomena and engineered solutions, offering a blueprint for innovation across various fields.</p>



<p>“This area of research is important since animals are known to take advantage of the flows, such as of air or water, left by other members of a group to save on the energy needed to move or to reduce drag or resistance,” explained Ristroph.</p>



<p>The next time you see a flock of birds painting the sky with their organized chaos, remember: you're witnessing some seriously complex engineering by Mother Nature. It's a symphony of aerodynamics, invisible springs, and perhaps some squawky arguments over who gets the best drafting position.</p>



<p>The study is published in the journal <em><a href="https://www.nature.com/articles/s41467-024-47525-9" target="_blank" rel="noreferrer noopener">Nature Communications</a></em>.</p>



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Bird flocking dynamics inspire advancements in technology

Spring invites us to witness the spectacle of bird migrations....

<p>Arbor Day originated in the United States during the early 1870s. The idea was conceived by J. Sterling Morton, a journalist and politician who moved from Detroit to the Nebraska Territory.&nbsp;</p>



<p>Morton was an agricultural enthusiast who recognized the environmental and economic value of trees. In the largely treeless plains of Nebraska, trees were needed for building materials, shade from the hot sun, and windbreaks to keep soil in place.</p>



<h2 class="wp-block-heading" id="h-origins-of-arbor-day">Origins of Arbor Day</h2>



<p>Morton first proposed a tree-planting holiday called "Arbor Day" at a meeting of the Nebraska State Board of Agriculture on January 4, 1872. The proposal was well received, and the first Arbor Day was celebrated in Nebraska on April 10, 1872. It was a huge success, with an estimated one million trees planted on that day.</p>



<p>The idea of an annual day specifically for planting trees quickly spread beyond Nebraska. Today, Arbor Day is observed in many countries around the world, each adapting the celebration to its own climate.&nbsp;</p>



<p>In the United States, it is typically celebrated on the last Friday in April, but many states observe the holiday on different dates that coincide with their local <a href="https://www.earth.com/news/planting-forests-with-diverse-tree-species-increases-likelihood-of-success/" target="_blank" rel="noreferrer noopener">tree planting</a> season. For example, Hawaii celebrates on the first Friday of November.</p>



<h2 class="wp-block-heading" id="h-why-are-trees-so-important">Why are trees so important?</h2>



<p>Trees are not just essential components of our natural landscape but vital guardians of our environment. These perennial plants do more than beautify our surroundings; they are fundamental to life on Earth.</p>



<h3 class="wp-block-heading" id="h-ecological-benefits-of-trees">Ecological benefits of trees</h3>



<p>The ecological significance of trees cannot be overstated. Primarily, they play a crucial role in mitigating climate change through carbon sequestration. Trees absorb <a href="https://www.earth.com/news/tree-rings-reveal-the-carbon-storage-capacity-of-a-forest/" target="_blank" rel="noreferrer noopener">carbon dioxide</a>, a predominant greenhouse gas, converting it into biomass through the process of photosynthesis. </p>



<p>This not only reduces the amount of harmful gases in the atmosphere but also provides us with oxygen, essential for life. A mature leafy tree produces as much oxygen in a season as 10 people inhale in a year.</p>



<p>Furthermore, trees contribute to increased biodiversity. They serve as habitats for countless species. Birds, insects, fungi, and moss are just a few examples of the life forms that depend on trees for survival.&nbsp;</p>



<p>The variety of life supported by trees enhances genetic diversity, which is vital for adaptation and resilience in the face of environmental changes.</p>



<h3 class="wp-block-heading" id="h-economic-benefits-of-trees">Economic benefits of trees</h3>



<p>Economically, trees offer significant advantages. In urban areas, they improve home values by up to 15% or more due to their aesthetic appeal and their role in creating a pleasant microclimate.&nbsp;</p>



<p>Beyond aesthetics, trees provide raw materials for industries such as furniture, paper, and construction. Fruit and nut trees contribute to food resources, providing both nourishment and economic gains through agriculture.</p>



<p>Trees also have a profound impact on energy consumption. By providing shade and releasing moisture into the air through their leaves, trees can reduce the need for air conditioning in nearby buildings by 30%. This not only cuts down energy costs but also reduces the strain on power grids during peak summer months, thereby decreasing the likelihood of power outages.</p>



<h3 class="wp-block-heading" id="h-health-benefits">Health benefits</h3>



<p>The health benefits of trees extend beyond their environmental and economic contributions. They play a significant role in improving air quality by filtering pollutants such as dust, microplastics, and gases through their leaves and bark. Urban vegetation can reduce pollutants in the air by up to 25%, contributing to healthier <a href="https://www.earth.com/news/non-native-trees-have-enormous-value-in-urban-areas/" target="_blank" rel="noreferrer noopener">urban environments</a>.</p>



<p>Moreover, trees have been shown to have a positive impact on <a href="https://www.earth.com/news/urban-forest-bathing-fresh-breath-for-teen-mental-health/" target="_blank" rel="noreferrer noopener">mental health</a>. The presence of green spaces in urban areas can lower rates of psychological stress and illness. People living near trees often have lower levels of stress, and children diagnosed with attention deficit hyperactivity disorder (ADHD) show fewer symptoms when they have access to nature.</p>



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



<p>Despite their immense benefits, trees face numerous threats, including deforestation, land development, and climate change. These challenges underscore the need for concerted conservation efforts.&nbsp;</p>



<p>Planting trees is a simple yet powerful act that can lead to significant environmental improvements. Arbor Day and similar celebrations can serve as vital reminders of our responsibilities toward forest conservation and management.</p>



<h2 class="wp-block-heading" id="h-significance-of-arbor-day">Significance of Arbor Day</h2>



<p>Arbor Day is significant for several reasons, primarily centered around environmental awareness and conservation.</p>



<h3 class="wp-block-heading" id="h-education-and-awareness">Education and awareness</h3>



<p>Arbor Day serves as an opportunity to educate the public about the benefits that trees and <a href="https://www.earth.com/news/forests-play-an-overlooked-role-in-the-climate-system/" target="_blank" rel="noreferrer noopener">forests</a> provide to communities and the global environment. It encourages people to learn about tree care and forest management.</p>



<h3 class="wp-block-heading" id="h-community-involvement">Community involvement</h3>



<p>The day promotes community spirit as people come together to beautify their neighborhoods and public spaces. It is a chance for community engagement through collective action, which can strengthen community bonds and foster civic pride.</p>



<h3 class="wp-block-heading" id="h-legacy-and-sustainability">Legacy and sustainability</h3>



<p>Planting trees on Arbor Day is also about investing in the future. Trees planted today will grow to provide benefits for many years, making it a gesture of hope and sustainability for future generations.</p>



<p>Arbor Day serves as an important reminder that trees are more than just part of our natural landscape; they are essential for sustaining ecological balance, supporting economic development, and promoting health. By understanding and promoting the importance of trees, we can all contribute to a healthier, more sustainable world.&nbsp;</p>



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Arbor Day: Honoring the guardians of our environment

Arbor Day originated in the United States during the early...

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



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



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



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



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



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

Nushagak Bay in southwest Alaska

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

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



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



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



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



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



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



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

Flu viruses are more flexible than expected

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



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



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



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



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



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<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

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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

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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>The mata mata turtle’s webbed digits mean that it is technically an aquatic species. But these reptiles have not adapted particularly well to swimming in open water. Instead, they can mostly be found lurking at the bottom of slow-moving rivers, streams and marshes, where they blend in with plant matter. Photo Credit: Farinosa/Getty Images</p>


Bottom Dwellers

<p>Furthermore, the mata mata turtle boasts concentrations of nerves on its mouth, chin and neck which help detect prey. The turtle’s huge ears also make it unusually sensitive to noise. So, the mata mata might not be able to see its next meal, but the creature can likely hear it coming. Photo Credit: Seregraff/Getty Images</p>