<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 Ruki River in the Democratic Republic of the Congo (DRC). It is a tributary of the Congo River, one of the largest <a href="https://www.earth.com/news/warmer-rivers-keep-antimicrobial-resistant-genes-at-bay/">rivers</a> in the world by discharge and depth. </p>



<p>The Ruki River, previously known as the Busira, merges with the Momboyo River near the town of Basankusu to become the Lulonga River, which eventually flows into the Congo River at the town of Lisala.</p>



<p>"If the appearance of the muddy Amazon River evokes a coffee cut with cream, the Ruki River, coursing gently through the Congo Basin, is like a dark tea," said NASA.</p>



<p>"On its slow path through mostly untouched lowland rainforest in the Democratic Republic of Congo (DRC), the water leaches organic material from vegetation, prompting some researchers to think it is one of the darkest blackwater rivers on Earth. The dissolved material in this distinctive water, scientists are finding, offers clues into the carbon cycle of tropical forests."</p>



<p>In a recent study, researchers measured the chemical composition and flow of the Ruki for the first time.&nbsp;</p>



<p>"The study reported that, as the water color suggests, the Ruki is rich in dissolved organic carbon compounds. It contains four times as much organic carbon as the Congo River and 1.5 times as much as the Rio Negro, the world’s largest blackwater river and a major tributary of the Amazon," said NASA.</p>



<p>Due to this heavy carbon load, the researchers concluded that “tropical forests like those around the Ruki might not accumulate quite as much carbon as we once thought.”</p>



<p>The region around the Ruki River is rich in biodiversity, hosting various species of flora and fauna. It is part of the Congo Basin, the second-largest tropical rainforest area in the world, which is a critical habitat for endangered species and a significant carbon sink.</p>



<p>The river is vital for the livelihoods of local communities. Fishing is a crucial activity, with many people depending on it for sustenance and income. The river also supports agriculture along its banks, where communities grow crops.</p>



<p>In many parts of the DRC, rivers like the Ruki are crucial transportation corridors due to the challenging and often nonexistent road infrastructure. The river enables the movement of people and goods, facilitating trade and access to markets, health care, and education.</p>



<p>The region faces several challenges, including deforestation, overfishing, and environmental degradation, which threaten its ecological balance and the livelihoods of people who depend on it. Efforts to manage and conserve the river's resources are vital for sustainable development.</p>



<p>Understanding and protecting the Ruki River and its surroundings are crucial for the DRC's environmental sustainability, economic development, and the well-being of its communities.</p>



<p>The image was captured by the OLI (Operational Land Imager) on Landsat 8.</p>



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



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



<p>Like what you read? <a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.</p>



<p>Check us out on <a href="https://www.earth.com/earthsnap/" target="_blank" rel="noreferrer noopener">EarthSnap</a>, a free app brought to you by <a href="https://www.linkedin.com/in/eric-ralls/" target="_blank" rel="noreferrer noopener">Eric Ralls</a> and Earth.com.</p>



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

The Ruki River in the Democratic Republic of the Congo

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/">NASA Earth Observatory</a> features dust streaming from Lago Colhué Huapi, a shallow endorheic lake located in the Chubut Province in southern Argentina.</p>



<p>"Strong northwesterly winds often race down the eastern side of the Andes Mountains and whip across the central Patagonian Desert. In the process, they sometimes lift dust from Argentina’s drying Lago Colhué Huapi, fueling intense dust storms," said NASA.</p>



<p>"Lago Colhué Huapi is a particularly rich source of dust because the shallow lake regularly grows and shrinks with variations in the flow of the Senguer River and the pace of evaporation. When lake water levels are low, as they were when MODIS captured this image, fine-grained, lightweight particles are easily transported by the wind."</p>



<h2 class="wp-block-heading" id="h-dust-activity-from-lago-colhue-huapi">Dust activity from Lago Colhué Huapi</h2>



<p><a href="https://www.earth.com/news/dust-storms-in-the-gulf-of-alaska-help-shape-the-global-climate/">Dust storms</a> in this region are most common during the summer months from December to March. There are 15 to 30 dust storms in a typical year.&nbsp;</p>



<p>"Dust storms are frequent and persistent enough in this area that they have exposed an open-air archaeological site along the lake’s edge," said NASA.</p>



<p>"The Puesto Roberts 1 site, located in an old floodplain on the southeast side of Lago Colhué Huapi, was first identified in 2019 when archaeologists noticed that winds had exposed a five-centimeter layer of sandy loam soil littered with stone tools and the bones of a wild species of llama called guanaco."</p>



<p>"Archaeologists identified 427 artifacts at the site - including stone cutting blades, milling tools, scrapers, and egg-shaped bola stones used for hunting - spread across 15 square meters, according to a 2022 study led by Heidi Hammond, an archaeologist at the National University of the Patagonia San Juan Bosco."</p>



<h2 class="wp-block-heading" id="h-more-about-lago-colhue-huapi">More about Lago Colhué Huapi</h2>



<p>This lake is an interesting geographical feature primarily because it acts as a seasonal sink for the Senguerr River, which in turn gathers waters from various smaller streams in the region. </p>



<h3 class="wp-block-heading" id="h-size">Size</h3>



<p>Due to its shallow nature, the size of Lago Colhué Huapi can vary significantly with the seasons and the amount of water it receives from its sources. During times of drought or reduced rainfall, the <a href="https://www.earth.com/news/climate-change-is-pushing-lakes-to-their-boiling-point/">lake</a> can shrink considerably, affecting the local ecosystem and the wildlife that depends on it.</p>



<h3 class="wp-block-heading" id="h-climate">Climate</h3>



<p>The lake's surroundings are characterized by a semi-arid climate, which influences the type of vegetation and animal life that can thrive in the area. Despite the harsh conditions, the region around Lago Colhué Huapi supports a variety of bird species, making it a site of interest for birdwatchers and naturalists.</p>



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



<p>In recent years, Lago Colhué Huapi has faced environmental challenges, including the impact of <a href="https://www.earth.com/news/alarming-study-most-of-the-worlds-largest-lakes-are-quickly-losing-water/">climate change</a>, which has led to lower water levels and increased salinity. These changes pose threats to the lake's ecological balance and the species that inhabit its waters and shores. The situation at Lago Colhué Huapi serves as a reminder of the broader environmental issues facing water bodies in arid and semi-arid regions around the world.</p>



<p>The image was captured on March 29, 2024 by the MODIS (Moderate Resolution Imaging Spectroradiometer) on NASA’s Aqua satellite.</p>



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



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



<p>Like what you read? <a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.</p>



<p>Check us out on <a href="https://www.earth.com/earthsnap/" target="_blank" rel="noreferrer noopener">EarthSnap</a>, a free app brought to you by <a href="https://www.linkedin.com/in/eric-ralls/" target="_blank" rel="noreferrer noopener">Eric Ralls</a> and Earth.com.</p>



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

Dust streams from Lago Colhué Huapi in Argentina 

<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 thick haze over Thailand during the fire season. The photograph was captured by the VIIRS (Visible Infrared Imaging Radiometer Suite) on the Suomi NPP satellite on March 16, 2024.</p>



<h2 class="wp-block-heading" id="h-waves-of-smoke-and-haze">Waves of smoke and haze</h2>



<p>"Each year in January and February, satellites begin to detect waves of smoke and fire in Southeast Asia, particularly in highland forests in Cambodia, Laos, Myanmar, and Thailand. Fire activity continues to increase through March and April, reaches a peak during the height of the dry season, and then fades in May with the start of the rainy season," noted NASA.</p>



<p>"Individual fires are usually small and short-lived. But they are often so numerous that smoke, along with air pollution from rural and urban areas, mixes to produce thick layers of haze that blanket the landscape." </p>



<p>"Such hazes contain mixtures of small airborne particles called aerosols and gaseous pollutants such as nitrogen dioxide, sulfur dioxide, carbon monoxide, and ozone that degrade air quality and have harmful health effects."</p>



<h2 class="wp-block-heading" id="h-haze-in-thailand-nbsp">Haze in Thailand&nbsp;</h2>



<p>An international field campaign - the Airborne and Satellite Investigation of Asian Air Quality (ASIA-AQ) - was recently launched to investigate the haze in Thailand.</p>



<p>"During the last two weeks of March 2024, NASA’s DC-8 and Gulfstream III aircraft flew several flights over Chiang Mai, Bangkok, and rural areas surrounding the cities to sample air quality with several sensors. At the same time, satellites observed the haze from above," said NASA.</p>



<p>James Crawford, ASIA-AQ’s principal investigator, said the team is collaborating closely with national and local government entities in Thailand.</p>



<p>“The goal is to take as many simultaneous measurements of pollutants as possible from the ground, air, and space,” said Crawford. The team will use the data to gain a better understanding of how the haze forms, evolves chemically over time, and moves throughout the region.</p>



<h2 class="wp-block-heading" id="h-haze-and-public-health-in-thailand">Haze and public health in Thailand </h2>



<p>According to media reports, nearly 200,000 people have been hospitalized this year due to air quality in the region, with over 1.3 million people falling ill since January.&nbsp;</p>



<h3 class="wp-block-heading" id="h-root-causes">Root causes</h3>



<p>The root causes of the haze include agricultural burning, particularly of corn fields, as part of slash-and-burn practices to prepare land for the next planting cycle. This is exacerbated by the dry season when there's little rain to wash the pollutants away. </p>



<p>The situation is worsened by industrial emissions and vehicle fumes, particularly in urban areas like Bangkok​.</p>



<h3 class="wp-block-heading" id="h-sustainable-solutions-are-needed">Sustainable solutions are needed</h3>



<p>Efforts to address the crisis have been complex, involving local and transboundary issues. Much of the agricultural burning occurs not only within Thailand but also in neighboring countries like Myanmar and Laos, contributing to the transboundary nature of the haze. </p>



<p>Activists and local communities have called for sustainable solutions that do not exacerbate the poverty of smallholder farmers, emphasizing the need for affordable and realistic alternatives to burning​.</p>



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



<p>The Thai government has implemented a no-burning rule until the end of April to combat wildfires and haze, but enforcement and effectiveness remain challenges​​. </p>



<p>Some measures taken to mitigate the immediate effects of pollution in urban areas include spraying water and seeding clouds to encourage rain, although these have had limited success​​.</p>



<p>This ongoing environmental crisis has sparked widespread concern among citizens, who are increasingly using public interest litigation to hold companies and the government accountable for environmental commitments. </p>



<p>With recent political changes, there is hope that the new administration will take more decisive action against the haze, possibly through more stringent regulations and international cooperation​​.</p>



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



<p>Haze poses several health hazards for those exposed to it, particularly when it contains fine particulate matter (PM2.5). Here are some of the main health risks associated with exposure to haze:</p>



<h3 class="wp-block-heading" id="h-respiratory-problems">Respiratory problems</h3>



<p>Haze can aggravate conditions such as asthma, bronchitis, and other chronic obstructive pulmonary diseases (COPD). The fine <a href="https://www.earth.com/news/heatwaves-and-air-pollution-may-double-fatal-heart-attack-risk/">particles</a> can penetrate deep into the lungs, causing inflammation and reducing lung function.</p>



<h3 class="wp-block-heading" id="h-cardiovascular-issues-and-haze">Cardiovascular issues and haze</h3>



<p>Exposure to fine particulate matter can also affect the cardiovascular system, leading to increased risk of heart attacks, strokes, and high blood pressure. Particles can affect blood vessel function and promote the formation of blood clots.</p>



<h3 class="wp-block-heading" id="h-eye-irritation">Eye irritation</h3>



<p>Haze can cause eye irritation, leading to conditions such as conjunctivitis (pink eye) or exacerbated symptoms in people with existing eye conditions.</p>



<h3 class="wp-block-heading" id="h-skin-problems">Skin problems</h3>



<p>For some people, exposure to <a href="https://www.earth.com/news/air-pollution-will-increase-dramatically-in-a-hotter-climate/">polluted air</a> can cause skin irritation or exacerbate skin conditions like eczema or psoriasis.</p>



<h3 class="wp-block-heading" id="h-reduced-immune-function">Reduced immune function</h3>



<p>There is evidence to suggest that prolonged exposure to polluted air can weaken the immune system, making individuals more susceptible to infections.</p>



<h3 class="wp-block-heading" id="h-impact-on-mental-health">Impact on mental health</h3>



<p>There are growing concerns about the impact of air pollution on <a href="https://www.earth.com/news/air-pollution-linked-to-multiple-chronic-health-conditions/">mental health</a>, with studies suggesting a link between exposure to polluted air and an increased risk of depression and anxiety.</p>



<h3 class="wp-block-heading" id="h-pregnant-women-and-children">Pregnant women and children</h3>



<p>Pregnant women, children, and the elderly are particularly vulnerable to the effects of haze. There may be increased risks of preterm birth and low birth weight in babies, and children may experience delayed development and reduced lung function.</p>



<p>The health impacts of haze can be mitigated by staying indoors on days when air quality is particularly poor, using air purifiers, wearing masks designed to filter out fine particles, and following local health advisories.</p>



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



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



<p>Like what you read? <a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.</p>



<p>Check us out on <a href="https://www.earth.com/earthsnap/" target="_blank" rel="noreferrer noopener">EarthSnap</a>, a free app brought to you by <a href="https://www.linkedin.com/in/eric-ralls/" target="_blank" rel="noreferrer noopener">Eric Ralls</a> and Earth.com.</p>



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



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

Haze pollution is an environmental crisis in Thailand

<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>



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



<p>Like what you read? <a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.</p>



<p>Check us out on <a href="https://www.earth.com/earthsnap/" target="_blank" rel="noreferrer noopener">EarthSnap</a>, a free app brought to you by <a href="https://www.linkedin.com/in/eric-ralls/" target="_blank" rel="noreferrer noopener">Eric Ralls</a> and Earth.com.</p>



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

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/">NASA Earth Observatory</a> features smoke streaming from a fire near the border of Oaxaca and Chiapas in southern Mexico.</p>



<p>"As Mexico entered peak fire season in March 2024, dry and warm conditions helped fuel the flames of more than 100 active blazes across the country," said NASA.</p>



<p>"According to Mexico’s National Forestry Commission (CONAFOR), there were 120 actively burning fires across Mexico on March 27. Preliminary data indicated that fires that day affected more than 7,000 hectares (27 square miles) across 19 of Mexico’s 31 states."</p>



<h2 class="wp-block-heading" id="h-fire-season-in-mexico-nbsp">Fire season in Mexico&nbsp;</h2>



<p>Fire season in Mexico is a period marked by a heightened risk of wildfires, primarily occurring from January through June, with the peak usually observed between March and May. This timing is largely due to the country's climatic patterns, where the end of the dry season and the beginning of the warmer spring months create conditions ripe for fires.&nbsp;</p>



<p>These conditions include dry vegetation, which serves as ample fuel for wildfires, and the onset of warmer temperatures, which can exacerbate the risk of fires starting and spreading.</p>



<p>Mexico's varied topography and climatic zones mean that fire risk and behavior can differ significantly across the country. However, areas with extensive forest cover, such as the pine-oak forests in the northern and central regions, are particularly vulnerable during the fire season.&nbsp;</p>



<p>Human activities, including agricultural practices such as the clearing of land through burning (known as "slash and burn"), contribute significantly to the ignition of these wildfires. Additionally, accidental fires caused by campfires, cigarettes, or even deliberate arson add to the annual fire count.</p>



<h2 class="wp-block-heading" id="h-intense-fire-seasons-across-the-globe-nbsp">Intense fire seasons across the globe&nbsp;</h2>



<p>The phenomenon of more <a href="https://www.earth.com/news/record-breaking-wildfire-years-are-just-getting-started/">intense fire seasons</a> across the globe is a complex and multifaceted issue that intertwines with climate change, land management practices, and human activities.&nbsp;</p>



<p>Over the past decades, several regions around the world have experienced unprecedented wildfires in both frequency and intensity. These fires have resulted in devastating impacts on ecosystems, wildlife, <a href="https://www.earth.com/news/wildfire-smoke-is-an-underestimated-threat-to-public-health/">air quality</a>, and human settlements.</p>



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



<p>In North America, particularly in the United States and Canada, fire seasons have become significantly longer and more destructive.&nbsp;</p>



<p>The combination of prolonged droughts, higher temperatures, and an increase in the amount of dead and dry vegetation has turned vast areas into tinderboxes, ready to ignite with a single spark.&nbsp;</p>



<p>Notably, the wildfires in <a href="https://www.earth.com/news/what-caused-the-devastating-2020-fire-season-in-california/">California</a> have set records for their sheer size and the amount of destruction they've caused, burning millions of acres and destroying thousands of homes.</p>



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



<p>Australia's fire season during 2019-2020, known as the Black Summer, was one of the most severe in the country's history. A prolonged drought and extreme heatwaves contributed to widespread <a href="https://www.earth.com/news/australian-bushfires-triggered-rare-multi-year-la-nina/">bushfires</a> that burned through millions of hectares, destroyed over 3,000 homes, and led to the loss of at least 33 lives.&nbsp;</p>



<p>The environmental impact was catastrophic, with significant losses to wildlife and biodiversity, including an estimated billion animals killed.</p>



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



<p>In the Amazon rainforest, often referred to as the Earth's lungs, there has been an alarming increase in fires. These are largely attributed to deforestation and agricultural practices.&nbsp;</p>



<p>The fires not only contribute to the global carbon emissions but also result in the loss of biodiversity and the degradation of vital ecosystems that are crucial for global climate regulation.</p>



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



<p>Europe has not been spared either, with countries like Greece, Portugal, and Spain experiencing deadly wildfires that have been linked to heatwaves and changing precipitation patterns. The Mediterranean region, in particular, is becoming more susceptible to wildfires as temperatures rise and summers become drier.</p>



<h3 class="wp-block-heading" id="h-siberia-fires">Siberia fires</h3>



<p>Russia's Siberia has also seen an increase in fire activity, with massive wildfires engulfing vast areas of forest. The smoke from these fires has reached as far as the United States and Canada, highlighting the global impact of such events. These fires not only release significant amounts of carbon dioxide but also thaw permafrost, releasing methane, a potent greenhouse gas.</p>



<p>The increasing intensity and frequency of fire seasons around the world underscore the urgent need for global action on <a href="https://www.earth.com/news/wildfire-impacts-are-evolving-due-to-climate-change-but-in-what-ways/">climate change</a> and more sustainable land management practices. As temperatures continue to rise and weather patterns become more extreme, the challenge of managing wildfires and mitigating their impacts becomes increasingly daunting.</p>



<p>The image was captured on March 27, 2024 by the OLI-2 (Operational Land Imager-2) on Landsat 9.</p>



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



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



<p>Like what you read? <a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.</p>



<p>Check us out on <a href="https://www.earth.com/earthsnap/" target="_blank" rel="noreferrer noopener">EarthSnap</a>, a free app brought to you by <a href="https://www.linkedin.com/in/eric-ralls/" target="_blank" rel="noreferrer noopener">Eric Ralls</a> and Earth.com.</p>



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

Intense fire season in Mexico is part of a worldwide trend

<p>Today's <strong>Image of the Day</strong> from the <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">European Space Agency</a> features Ireland and the coasts of Scotland, Wales, and England along the North Atlantic Ocean.</p>



<p>"The image is from January 2024 and was captured on a relatively clear winter day. Ireland enjoys a mild climate, owing to the influence of the Atlantic Ocean (to the left) and the presence of the Gulf Stream. South-westerly winds from the Atlantic tend to bring a lot of rain in the northwest, west and southwest of the country," said ESA.</p>



<p>"The extensive grasslands that cover most of the country, washed by abundant rainfall all year, create the typical emerald-green landscape, hence it being known as the Emerald Isle. Brown rugged cliffs along the west coast frame the island’s green interior, speckled by hundreds of lakes, visible as dark spots in the image."</p>



<p>Ireland is divided into two distinct jurisdictions: the Republic of Ireland, which occupies most of the island, and Northern Ireland, which is part of the United Kingdom.&nbsp;</p>



<p>Ireland is the third-largest island in Europe, featuring a varied landscape of rolling hills, extensive plains, and rugged coastlines. Its highest peak is Carrauntoohil, part of the Macgillycuddy's Reeks range in County Kerry.&nbsp;</p>



<p>The island is encircled by the Atlantic Ocean, with the Celtic Sea to the south, St George's Channel to the southeast, and the Irish Sea to the east.</p>



<p>Ireland's history is marked by Viking invasions, Norman conquests, and centuries of English rule, culminating in a struggle for independence in the early 20th century.&nbsp;</p>



<p>The Republic of Ireland gained independence from the United Kingdom in 1922, following the Irish War of Independence. Northern Ireland, however, remained a part of the UK, leading to ongoing sectarian and political tensions, notably the "Troubles" in the late 20th century.</p>



<p><a href="https://www.earth.com/news/irish-community-survived-a-thousand-years-of-environmental-change/">Irish culture</a> is known worldwide for its literature, music, dance, and folklore. Notable literary figures include James Joyce, W.B. Yeats, and Samuel Beckett.&nbsp;</p>



<p>The country's cultural heritage is celebrated on St. Patrick's Day, Ireland's national holiday, observed globally with parades and festivities.</p>



<p>Image Credit: ESA/ Copernicus Sentinel-3&nbsp;</p>



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



<p>Like what you read? <a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.</p>



<p>Check us out on <a href="https://www.earth.com/earthsnap/" target="_blank" rel="noreferrer noopener">EarthSnap</a>, a free app brought to you by <a href="https://www.linkedin.com/in/eric-ralls/" target="_blank" rel="noreferrer noopener">Eric Ralls</a> and Earth.com.</p>



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

The island of Ireland in the North Atlantic Ocean

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

<span style="font-weight: 400;">This </span>Image of the Day<span style="font-weight: 400;"> from </span><a href="https://earthobservatory.nasa.gov/"><span style="font-weight: 400;">NASA Earth Observatory</span></a><span style="font-weight: 400;"> features the city of Timbuktu in the <a href="https://www.earth.com/image/dust-storm-in-the-sahara-desert/">Sahara Desert</a>. </span><span style="font-weight: 400;">Timbuktu in the Sahara Desert is so remote that two long roads are the only reliable ways to access the city. In medieval times, however, Timbuktu served as a major trading hub where people met to exchange salt, gold, and ivory.</span><i></i>

Timbuktu in the Sahara Desert

<p>Visual perception is deeply linked to the act of blinking. So<strong>,</strong> have you ever wondered why we <a href="https://www.earth.com/news/blinking-stability-vision/" target="_blank" rel="noreferrer noopener">blink</a> so much? While it may seem minor, blinking significantly affects our waking hours by impacting our vision.</p>



<p>Humans spend 3 to 8 percent of their time awake with their eyes closed. More than just moisturizing the eyes, blinking plays a critical role in how we see the world.</p>



<p>This connection was the focus of a pivotal study by researchers from the <a href="https://www.rochester.edu/" target="_blank" rel="noreferrer noopener">University of Rochester</a>. Their findings, published in the <em>Proceedings of the National Academy of Sciences</em>, reveal that blinking is crucial for processing <a href="https://www.earth.com/news/visual-masking-your-brain-can-see-things-without-your-knowledge/" target="_blank" rel="noreferrer noopener">visual information</a>, highlighting its essential role in our visual experiences.</p>



<h2 class="wp-block-heading" id="h-surprising-impact-of-blinking-on-vision">Surprising impact of blinking on vision</h2>



<p>The study team, led by Michele Rucci, a professor in the <a href="https://www.sas.rochester.edu/bcs/" target="_blank" rel="noreferrer noopener">Department of Brain and Cognitive Sciences</a>, investigated the effects of blinking on visual perception. </p>



<p>"By modulating the visual input to the retina, blinks effectively reformat visual information, yielding luminance signals that differ drastically from those normally experienced when we look at a point in the scene," explains Rucci. </p>



<p>As a result, this modulation allows our brains to receive and interpret visual stimuli in a uniquely beneficial way.</p>



<h2 class="wp-block-heading" id="h-new-insights-into-blinking">New insights into blinking</h2>



<p>Rucci and his team used eye-tracking technologies and computer models to study how blinking affects <a href="https://www.earth.com/news/rising-temperatures-linked-to-vision-impairment/" target="_blank" rel="noreferrer noopener">our vision</a>.</p>



<p>Consequently<strong>,</strong> their findings challenge the traditional view that blinking only serves to moisten the eyes. Instead, they found that blinking crucially enhances our perception of larger, gradual changes in our environment.</p>



<p>This occurs because the rapid motion of the eyelid during a blink alters the patterns of light reaching the retina. This creates a unique visual signal that aids in processing the overall 'big picture' of what we see.</p>



<h2 class="wp-block-heading" id="h-blinking-as-a-beneficial-vision-disruptor">Blinking as a beneficial vision disruptor</h2>



<p>The notion that blinking might disrupt visual continuity is a common assumption. However, the research findings suggest otherwise.</p>



<p>"We show that human observers benefit from blink transients as predicted from the information conveyed by these transients," says Bin Yang, a graduate student in Rucci's lab and the first author of the paper. </p>



<p>This suggests that blinks actually improve <a href="https://www.earth.com/news/eating-carrots-and-colorful-veggies-really-can-improve-your-eyesight/" target="_blank" rel="noreferrer noopener">visual processing</a> by providing critical information that compensates for any loss in stimulus exposure during the blink.</p>



<h2 class="wp-block-heading" id="h-vision-a-sensory-process-aided-by-movement">Vision: a sensory process aided by movement</h2>



<p>The implications of Rucci's research extend beyond blinking. They contribute to a broader understanding of how vision operates similarly to other senses, such as smell and touch. In these senses, body movements assist in interpreting spatial information.</p>



<p>Thus, this challenges the previously held belief that <a href="https://www.earth.com/news/our-brain-delays-visual-inputs-by-15-seconds-to-keep-us-stable/" target="_blank" rel="noreferrer noopener">vision</a> was fundamentally different because spatial information is explicitly available in the image on the retina.</p>



<p>"Our results suggest that this view is incomplete and that vision resembles other <a href="https://www.earth.com/news/visual-perception-speed-varies-greatly-among-humans/" target="_blank" rel="noreferrer noopener">sensory</a> modalities more than commonly assumed," Rucci adds. This new perspective underscores the dynamic interaction between sensory input and motor activities in shaping how we perceive the world.</p>



<h2 class="wp-block-heading" id="h-embracing-the-blink">Embracing the blink</h2>



<p>In summary, the act of blinking, which may seem like a vulnerability in our visual system, is actually a beneficial process that enhances our ability to perceive and process visual information. </p>



<p>By reformatting visual input and providing the brain with information about the overall scene, blinking plays a crucial role in our visual perception. </p>



<p>This research challenges the common assumption that vision is fundamentally different from other senses and highlights the importance of understanding the complex interplay between sensory input and motor activity in human perception.</p>



<p>The full study was published in the journal <em><em><a href="https://www.pnas.org/doi/10.1073/pnas.2310291121" target="_blank" rel="noreferrer noopener">Proceedings of the National Academy of Sciences</a></em></em>.</p>



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



<p>Like what you read? <a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.&nbsp;</p>



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



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

Blinking plays a crucial role in vision and human perception

Visual perception is deeply linked to the act of blinking....

<p>Recent research reveals a concerning escalation in the simultaneous occurrence of heatwaves and extreme <a href="https://www.earth.com/news/sea-levels-ocean-heat-and-emissions-hit-record-highs-last-year/" target="_blank" rel="noreferrer noopener">sea level rises</a> along coastlines worldwide. This phenomenon, known as Concurrent Heat Wave and Extreme Sea Level (CHWESL) events, has experienced a significant uptick in frequency between 1998 and 2017. </p>



<p>This increase is highly notable when compared to the preceding two decades. A recent study detailed in <em>Communications Earth &amp; Environment</em> highlights this alarming trend and includes projections that suggest an even more drastic increase under future high emissions scenarios.</p>



<h2 class="wp-block-heading" id="h-tracking-the-tide-and-temperature">Tracking the tide and temperature</h2>



<p>Shuo Wang and Mo Zhou conducted the research, focusing on CHWESL events from 1979 through 2017. They also projected future occurrences from 2025 to 2049, using the Intergovernmental Panel on Climate Change’s high emissions pathway, the SSP5-8.5 scenario.</p>



<p>Their analysis shows that CHWESL events have already affected roughly 88% of the world’s coastlines during the study period.</p>



<p>Additionally, about 39% of these coastlines have experienced a noticeable increase in the frequency and duration of these events over the last two decades. Tropical regions have suffered most from this escalation.</p>



<p>The researchers found a strong correlation between the intensity of heatwaves and the increased likelihood of concurrent sea level rises. </p>



<p>Specifically, a 1% increase in <a href="https://www.earth.com/news/marine-heat-waves-are-persisting-in-the-u-s-even-in-winter/" target="_blank" rel="noreferrer noopener">heat wave intensity</a> leads to a 2% increase in the likelihood of a CHWESL event occurring.</p>



<h2 class="wp-block-heading" id="h-escalating-chwesl-events-and-their-impacts">Escalating CHWESL events and their impacts</h2>



<p>Looking ahead, the study forecasts that global coastal areas might endure, on average, 38 days of CHWESL conditions each year. This projection covers the period between 2025 and 2049.</p>



<p>Consequently, this represents a staggering increase of 31 days compared to the historical period of 1989–2013.</p>



<p>Such a surge in CHWESL events poses severe risks. The intensified <a href="https://www.earth.com/news/once-in-a-century-heatwave-may-soon-happen-every-other-year/" target="_blank" rel="noreferrer noopener">heat</a> directly impacts human health, and heightened sea levels compound these effects.</p>



<h2 class="wp-block-heading" id="h-strengthening-resilience-against-climatic-threats">Strengthening resilience against climatic threats</h2>



<p>"The significant rise in both the occurrence and intensity of these events, especially in tropical areas, calls for an urgent need to develop robust risk mitigation strategies," explained Shuo Wang. </p>



<p>"Countries, particularly those with low to middle incomes in these regions, are likely to face <a href="https://www.earth.com/news/frequent-heatwaves-have-become-the-norm-in-the-arctic-ocean/" target="_blank" rel="noreferrer noopener">severe challenges</a> in coping with these dual threats," he adds.</p>



<p>Mo Zhou further emphasized the importance of preparedness. He stated, "It is crucial that we prioritize and refine our strategies for dealing with these events. Developing comprehensive risk mitigation plans is imperative for enhancing resilience against future CHWESL occurrences."</p>



<h2 class="wp-block-heading" id="h-global-collaboration-to-combat-chwesl-events">Global collaboration to combat CHWESL events</h2>



<p>The findings from Wang and Zhou’s study serve as a crucial call to action for policymakers, researchers, and community leaders globally.</p>



<p>Furthermore, as the planet warms and sea levels rise, experts project that the frequency and severity of CHWESL events will increase. </p>



<p>This trend underscores the urgent need for proactive approaches in <a href="https://www.earth.com/news/ignoring-climate-change-will-lead-to-ultra-extreme-heatwaves/" target="_blank" rel="noreferrer noopener">climate</a> adaptation and disaster preparedness.</p>



<p>Consequently, the intersection of intensifying heatwaves and rising sea levels presents a formidable challenge to coastal communities worldwide.</p>



<p>Therefore, addressing this dual hazard requires a concerted effort to integrate scientific research with effective policy and community engagement. </p>



<p>Such collaboration ensures that all nations, especially the most vulnerable, are equipped to manage and mitigate the risks of future CHWESL events.</p>



<p>The full study was published in the journal <em><a href="https://www.nature.com/articles/s43247-024-01274-1" target="_blank" rel="noreferrer noopener">Communications Earth &amp; Environment</a></em>.</p>



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



<p>Like what you read? <a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.&nbsp;</p>



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



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

CHWESL events: When sea levels rise in response to heatwaves

Recent research reveals a concerning escalation in the simultaneous occurrence...

Artistic Composition of DESI Year-One Data Slice Above the Nicho

<p>In an extraordinary feat of cosmic exploration, astronomers are embarking on a five-year journey to create the most extensive 3D map of the cosmos ever conceived. The Dark Energy Spectroscopic Instrument (<a href="https://noirlab.edu/public/projects/desi/" target="_blank" rel="noreferrer noopener">DESI</a>) is at the forefront of this endeavor, and its initial findings are already reshaping our understanding of the universe.</p>



<h2 class="wp-block-heading" id="h-measuring-the-universe-s-expansion-with-dark-energy">Measuring the universe's expansion with dark energy</h2>



<p>Using spectra from nearby galaxies and distant <a href="https://www.earth.com/news/quasar-j0529-4351-brightest-object-ever-seen-eats-one-star-per-day/" target="_blank" rel="noreferrer noopener">quasars</a>, astronomers from the DESI collaboration have measured the expansion history of the universe with unparalleled precision.</p>



<p>By analyzing the survey's first-year data, which contains the largest extragalactic spectroscopic sample ever collected, researchers have achieved a precision better than 1% over the last 11 billion years.</p>



<p>"We're incredibly proud of the data, which have produced world-leading cosmology results," said Michael Levi, DESI director and LBNL scientist. </p>



<p>"So far we're seeing basic agreement with our best model of the Universe, but we're also seeing some potentially interesting differences that could indicate dark energy is evolving with time," Levi continued.</p>



<h2 class="wp-block-heading" id="h-mapping-the-cosmos-at-an-unprecedented-rate">Mapping the cosmos at an unprecedented rate</h2>



<p>DESI's ability to collect light from millions of galaxies across more than a third of the entire sky is truly remarkable. </p>



<p>By breaking down the light from each galaxy into its spectrum of colors, DESI can determine how much the light has been <a href="https://www.earth.com/news/new-study-claims-our-universe-is-27-billion-years-old-double-the-current-age-estimate/" target="_blank" rel="noreferrer noopener">redshifted</a>, or stretched to a longer wavelength, by the expansion of the Universe during its billions of years of travel before reaching Earth.</p>



<p>Equipped with 5000 tiny robotic 'eyes,' DESI can perform this measurement at an unprecedented rate. In its first year alone, DESI surpassed all previous surveys of its kind in terms of quantity and quality, bringing new insight to one of the biggest mysteries in physics: dark energy.</p>



<p>"The DESI instrument has transformed the <a href="https://noirlab.edu/public/programs/kitt-peak-national-observatory/nicholas-mayall-4m-telescope/" target="_blank" rel="noreferrer noopener">Mayall Telescope</a> into the world's premier cosmic cartography machine," says Pat McCarthy, Director of NOIRLab. </p>



<p>"The DESI team has set a new standard for studies of large-scale structure in the Universe. These first-year data are only the beginning of DESI's quest to unravel the expansion history of the Universe and they hint at the extraordinary science to come," McCarthy concluded.</p>



<h2 class="wp-block-heading" id="h-baryon-acoustic-oscillations-the-cosmic-ruler">Baryon Acoustic Oscillations: The cosmic ruler</h2>



<p>DESI's first-year data have allowed astronomers to measure the expansion rate of the universe out to 11 billion years in the past, when the universe was only a quarter of its current age. </p>



<p>They accomplished this feat by using a feature of the large-scale structure of the universe called Baryon Acoustic Oscillations (BAO).</p>



<p>BAO are the leftover imprint of pressure waves that permeated the early Universe when it was nothing but a hot, dense soup of subatomic particles. </p>



<p>As the universe expanded and cooled, the waves stagnated, freezing the ripples in place and seeding future galaxies in the dense areas.</p>



<p>With DESI's unique ability to map millions of objects both near and far, the BAO pattern can be used as a cosmic ruler. </p>



<p>By mapping nearby galaxies and distant <a href="https://www.earth.com/news/largest-map-of-supermassive-black-holes-unveiled/" target="_blank" rel="noreferrer noopener">quasars</a>, astronomers can measure the spread of the ripples across several periods of cosmic history to see how dark energy has stretched the scale over time.</p>



<h2 class="wp-block-heading" id="h-desi-s-quest-continues-on-its-5-year-odyssey">DESI's quest continues on its 5-year odyssey</h2>



<p>While the expansion history of the universe may be more complex than previously imagined, confirmation of this must await the completion of the DESI project. </p>



<p>By the end of its five-year survey, DESI plans to map over 3 million quasars and 37 million galaxies. As more data are released, astronomers will further improve their results.</p>



<p>"This project is addressing some of the biggest questions in astronomy, like the nature of the mysterious dark energy that drives the expansion of the Universe," says Chris Davis, NSF program director for NOIRLab. "The exceptional and continuing results yielded by the NSF Mayall telescope with DOE DESI will undoubtedly drive cosmology research for many years to come."</p>



<p>"We are delighted to see cosmology results from DESI's first year of operations," said Gina Rameika, associate director for High Energy Physics at the <a href="https://www.energy.gov/" target="_blank" rel="noreferrer noopener">Department of Energy</a>. "DESI continues to amaze us with its stellar performance and how it is shaping our understanding of dark energy in the Universe."</p>



<h2 class="wp-block-heading" id="h-dark-energy-and-the-expansion-of-the-universe">Dark energy and the expansion of the universe</h2>



<p>A main component of the DESI project, dark energy, a perplexing and invisible force, permeates the universe and plays a crucial role in its accelerating expansion. </p>



<p>Scientists first discovered evidence for dark energy in the late 1990s when they observed that distant supernovae were dimmer than expected, suggesting that the universe's expansion was speeding up rather than slowing down.</p>



<h3 class="wp-block-heading">Nature of dark energy</h3>



<p>Despite its significant influence on the universe's evolution, the nature of dark energy remains one of the greatest enigmas in modern cosmology. Researchers have proposed several theories to explain its existence, including:</p>



<ul>
<li><strong>The cosmological constant</strong>: This theory suggests that dark energy is an inherent property of space itself, with a constant density throughout the universe.</li>
</ul>



<ul>
<li><strong>Scalar fields</strong>: Some scientists propose that dark energy arises from scalar fields, such as quintessence, which can vary in space and time.</li>
</ul>



<ul>
<li><strong>Modified gravity</strong>: This theory posits that dark energy is not a separate entity but rather a manifestation of modifications to Einstein's <a href="https://www.earth.com/news/radical-new-theory-finally-unites-gravity-spacetime-and-the-quantum-realm/" target="_blank" rel="noreferrer noopener">theory of general relativity</a> on cosmic scales.</li>
</ul>



<h3 class="wp-block-heading">Dark energy's impact on the universe</h3>



<p>Dark energy's presence has a profound impact on the universe's evolution and ultimate fate. As dark energy continues to drive the universe's accelerating expansion, it counteracts the attractive force of gravity. This has several consequences:</p>



<ul>
<li><strong>Galaxy clusters</strong>: Dark energy's repulsive force makes it more difficult for galaxy clusters to form and grow over time.</li>
</ul>



<ul>
<li><strong>The Universe's fate</strong>: If dark energy continues to dominate, the universe may eventually experience a "Big Rip," where galaxies, stars, and even atoms are torn apart by the ever-increasing expansion.</li>
</ul>



<ul>
<li><strong>The observable Universe</strong>: As the universe expands faster, more distant objects will move beyond our cosmic horizon, limiting the observable universe from our perspective.</li>
</ul>



<h2 class="wp-block-heading" id="h-desi-dark-energy-and-the-future-of-cosmology">DESI, dark energy, and the future of cosmology</h2>



<p>In summary, the Dark Energy Spectroscopic Instrument (DESI) has embarked on an awe-inspiring journey to unravel the mysteries of the universe. </p>



<p>With its unparalleled precision, innovative technology, and the tireless efforts of an international collaboration, DESI is reshaping our understanding of dark energy and the cosmos as a whole. </p>



<p>As the survey progresses, astronomers eagerly anticipate the stunning discoveries that will emerge from DESI's ever-expanding 3D map of the Universe. </p>



<p>This monumental endeavor showcases the power of human curiosity and scientific advancement while promising to redefine our place in the grand cosmic tapestry for generations to come.</p>



<p>The full study was published in the journal <em><a href="https://www.cell.com/current-biology/fulltext/S0960-9822(24)00391-9?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS0960982224003919%3Fshowall%3Dtrue">Current Biology</a></em>.</p>



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



<p>Like what you read? <a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.</p>



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



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

Expansion rate of the universe measured out to 11 billion years ago using dark energy

In an extraordinary feat of cosmic exploration, astronomers are embarking...

<p>Imagine a large antelope, not the usual dusty brown, but shimmering with a bluish-gray coat. Sleek, swift, and mysterious – that was the blue antelope. </p>



<p>Sadly, this beautiful animal hasn't roamed the grasslands of South Africa in over 200 years. But why? That's the puzzle scientists have been determined to solve.</p>



<h2 class="wp-block-heading" id="h-blue-antelope-extinction">Blue antelope extinction</h2>



<p>Picture this: It's the late 1700s. European colonists are venturing into southern Africa, coming across the magnificent blue antelope. </p>



<p>Within a mere few decades, this unique species vanishes -- extinct, wiped off the face of the Earth just 34 years after it was first scientifically described.</p>



<p>Doesn't that seem incredibly fast? You might wonder, how can an entire species disappear so quickly? The rapid decline of the blue antelope serves as a stark reminder of the fragile balance within ecosystems and the profound impact <a href="https://www.earth.com/news/study-addresses-the-global-need-for-human-wildlife-coexistence/" target="_blank" rel="noreferrer noopener">human activities</a> can have on wildlife.</p>



<h2 class="wp-block-heading" id="h-clues-in-ancient-dna">Clues in ancient DNA</h2>



<p>Fast forward to today, and scientists have a powerful tool: DNA. A team of researchers, led by Prof. Dr. Michael Hofreiter from the <a href="https://www.uni-potsdam.de/en/university-of-potsdam" target="_blank" rel="noreferrer noopener">University of Potsdam</a>, carefully extracted DNA from a museum specimen of a blue antelope. This wasn't just any DNA -- they got a super detailed look at its genetic blueprint.</p>



<p>Now, when species have small populations for a long time, their DNA starts to show signs of inbreeding and harmful mutations build up. </p>



<p>Think of it like a family tree that keeps getting more tangled over generations. This can make them extra vulnerable to extinction.</p>



<p>But, here's the twist: "However, the blue <a href="https://www.earth.com/news/world-hirola-day-celebrating-a-rare-and-endangered-antelope-species/" target="_blank" rel="noreferrer noopener">antelope</a> had a small population size for many millennia before it became extinct around 1800," explains Dr Hofreiter. Surprisingly, its DNA didn't show these classic danger signs. </p>



<p>"The fact that no inbreeding and only a few detrimental mutations were detected indicates that the species was adapted to long-term low population size," adds Elisabeth Hempel, who analyzed the DNA.</p>



<h2 class="wp-block-heading" id="h-so-what-did-kill-off-the-blue-antelope">So, what <em>did</em> kill off the blue antelope?</h2>



<p>Big populations of animals like antelopes usually shrink and grow with the ice ages. When the planet gets colder, <a href="https://www.earth.com/news/grasslands-play-a-major-role-in-mitigating-climate-change/" target="_blank" rel="noreferrer noopener">grasslands</a> dwindle, and so do the herds. </p>



<p>But, the blue antelope's DNA shows they sailed through those icy times just fine. Its numbers stayed pretty steady, so climate change wasn't the culprit.</p>



<p>"This result suggests that current models of long-term ecosystem dynamics in the region may need to be refined," the researchers concluded. In other words, we might need to rethink how we understand African wildlife history.</p>



<h2 class="wp-block-heading" id="h-adaptation-of-blue-antelope">Adaptation of blue antelope</h2>



<p>The blue antelope had naturally existed in small populations for a very long time. This means they were remarkably well-adapted to survive with limited numbers. </p>



<p>Additionally, their population size remaining steady through ice ages shows their ability to handle harsh environmental changes.</p>



<p>While the blue antelope could handle natural challenges, the arrival of European colonizers brought a whole new level of disruption. This happened incredibly quickly on an evolutionary timescale, likely overwhelming the species.</p>



<h2 class="wp-block-heading" id="h-the-factors-of-human-impact">The factors of human impact</h2>



<p>Colonizers building towns and farms would have fragmented and destroyed the blue <a href="https://www.earth.com/news/case-study-how-african-antelopes-are-responding-to-rising-temperatures/" target="_blank" rel="noreferrer noopener">antelope's</a> habitat. This shrinks their range and makes them even more vulnerable as a small population.</p>



<p>Even if not hunted to extinction directly, antelopes would have been targeted as food sources by settlers, significantly reducing their numbers.</p>



<p>European land use practices, like agriculture and grazing, would have drastically changed the African grasslands. This could have wiped out food sources for the blue antelope or altered the landscape in ways they couldn't adapt to.</p>



<p>Therefore, these rapid, human-made changes likely acted together as a devastating blow the blue antelope couldn't recover from. </p>



<p>Their long history of resilience against natural pressures was tragically no match for the swift disruption of colonization.</p>



<h2 class="wp-block-heading" id="h-more-about-the-blue-antelope">More about the blue antelope</h2>



<p>As discussed above, the blue antelope, known scientifically as <em>Hippotragus leucophaeus</em>, stood out from its relatives with its distinctive bluish-gray pelt, which earned it its name. Its iconic curved horns and majestic stature made it a truly magnificent sight in the southern African landscapes.</p>



<h3 class="wp-block-heading" id="h-physical-characteristics">Physical characteristics</h3>



<p>Physically, the blue antelope was robust and well-built, comparable in size to other members of the Hippotragus genus. It typically stood at about 120 to 150 cm (47 to 59 inches) at the shoulder, making it a medium-sized <a href="https://www.earth.com/endangered-species/panthalops-hodgsonii/" target="_blank" rel="noreferrer noopener">antelope</a>. The body was muscular and compact, designed for endurance rather than speed.</p>



<p>One of its most distinctive features was its horns. Both males and females possessed these strong, ringed horns, which were slightly curved backwards. </p>



<p>The horns were not only a defense mechanism but also played a role in the animal’s social interactions and mating rituals.</p>



<p>The blue antelope's eyes and face were marked with subtle white patches, contrasting with the darker tones of its body, adding to its striking appearance. Its legs were strong and ended in cloven hooves, adapted for navigating the rough terrains of its habitat in southern Africa.</p>



<p>Overall, the blue antelope was a beautiful and formidable species, evolved to thrive in its specific ecological niche before its unfortunate extinction.</p>



<h3 class="wp-block-heading">Habitat and lifestyle</h3>



<p>Native to the grasslands and lightly wooded areas of southern Africa, particularly modern-day South Africa, the blue antelope adapted well to its environment. It thrived in open landscapes, grazing on the plentiful grasses and herbs. </p>



<p>Despite these seemingly ideal conditions, the blue antelope never existed in large numbers, maintaining a small population footprint throughout its history.</p>



<h2 class="wp-block-heading" id="h-blue-antelope-legacy">Blue antelope legacy</h2>



<p>While the loss of the blue <a href="https://www.earth.com/endangered-species/alcelaphus-buselaphus-tora/" target="_blank" rel="noreferrer noopener">antelope</a> is tragic, its story isn't over. Scientists even managed to pinpoint the genes that likely gave it that incredible blue-gray coat.</p>



<p>"As part of Colossal's ongoing focus on ancient DNA, genotype to phenotype relationships, and ecosystem restoration, we were honored to collaborate on the groundbreaking work of Professor Hofreiter and his team," said Ben Lamm, co-founder and CEO of Colossal Bioscience. </p>



<p>"The research objectives for the project allowed our teams to work together applying some of the latest Colossal ancient DNA and comparative genomic algorithms to learn what truly made the blue antelope the unique species it was."</p>



<p>The extinction of the blue antelope shows us the fragility of nature and the unintended impact humans can have. It's a reminder that even species tough enough to outlast ice ages can be vulnerable to our actions.</p>



<p>The full study was published in the journal <em><a href="https://www.cell.com/current-biology/fulltext/S0960-9822(24)00391-9?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS0960982224003919%3Fshowall%3Dtrue" target="_blank" rel="noreferrer noopener">Current Biology</a></em>.</p>



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



<p>Like what you read? <a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.</p>



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



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

Blue antelope extinction was caused by European colonization

Imagine a large antelope, not the usual dusty brown, but...

<p>Every day, microplastics are making their way into our bodies through water, food, and even the air we breathe. Researchers led by the <a href="https://www.unm.edu/" target="_blank" rel="noreferrer noopener">University of New Mexico</a> (UNM) has explored the impact of <a href="https://www.earth.com/news/consumption-of-microplastics-cant-be-avoided-and-they-damage-gut-health/">microplastics</a> on the human digestive system and organs including the kidney, liver, and brain.</p>



<p>“Over the past few decades, microplastics have been found in the ocean, in animals and plants, in tap water and bottled water. They appear to be everywhere,” said Eliseo Castillo, an expert in mucosal immunology at UNM.</p>



<h2 class="wp-block-heading" id="h-microplastics-in-organ-tissues">Microplastics in organ tissues</h2>



<p>Experts estimate that the average person ingests about five grams of microplastics each week - the equivalent of the weight of a credit card. While many studies have focused on identifying and quantifying these particles, Castillo’s team is investigating their internal effects, particularly on the gastrointestinal (GI) tract and the <a href="https://www.earth.com/news/our-gut-microbiome-is-shaped-by-what-we-eat/">gut</a> immune system.</p>



<p>In their experiments, mice were exposed to microplastics through their drinking water over a four-week period, mirroring the estimated weekly microplastic intake of humans. The results were alarming: microplastics not only migrated from the gut into the tissues of the liver, kidney, and <a href="https://www.earth.com/news/microplastic-exposure-linked-to-changes-in-the-brain/">brain</a> but also altered metabolic pathways within these organs.</p>



<h2 class="wp-block-heading" id="h-microplastics-can-cross-the-intestinal-barrier-nbsp">Microplastics can cross the intestinal barrier&nbsp;</h2>



<p>“We could detect microplastics in certain tissues after the exposure. That tells us it can cross the intestinal barrier and infiltrate into other tissues,” Castillo said. “These mice were exposed for four weeks. Now, think about how that equates to humans, if we're exposed from birth to old age.”</p>



<p>The study also raises concerns about the potential for microplastics to exacerbate underlying health conditions. Castillo’s earlier research has shown that microplastics impact macrophages - the immune cells that protect the body from foreign particles. For instance, a 2021 study published in the journal <a href="https://link.springer.com/article/10.1007/s10565-021-09616-x" target="_blank" rel="noreferrer noopener"><em>Cell Biology and Toxicology</em></a> revealed that microplastics alter macrophage function, triggering them to release inflammatory molecules.</p>



<p>“It is changing the metabolism of the cells, which can alter inflammatory responses. During intestinal inflammation – states of chronic illness such as ulcerative colitis and Crohn’s disease, which are both forms of inflammatory bowel disease – these macrophages become more inflammatory and they’re more abundant in the gut,” Castillo explained.</p>



<h2 class="wp-block-heading" id="h-how-does-diet-influence-microplastic-intake-nbsp">How does diet influence microplastic intake?&nbsp;</h2>



<p>Looking ahead, Castillo’s team, including postdoctoral fellow Sumira Phatak, is set to explore how diet influences microplastic uptake. They plan to experiment with different <a href="https://www.earth.com/news/healthier-diets-are-not-attainable-for-everyone/">diets</a> in laboratory animals to see if certain foods affect the body’s absorption of microplastics.</p>



<p>“Everyone’s diet is different. So, what we're going to do is give these laboratory animals a high-cholesterol/high-fat diet, or high-fiber diet, and they will be either exposed or not exposed to microplastics. The goal is to try to understand if diet affects the uptake of microplastics into our body,” Castillo added.</p>



<h2 class="wp-block-heading" id="h-changes-in-gut-microbiota-nbsp">Changes in gut microbiota&nbsp;</h2>



<p>Moreover, Castillo’s PhD student, Aaron Romero, is investigating changes in the gut microbiota caused by microplastics. While it’s known that microplastics can alter the microbiota, the mechanisms behind these changes remain unclear.</p>



<p>Ultimately, the experts hope that these findings will not only deepen our understanding of the health impacts of microplastics but also catalyze changes in how plastics are produced and managed.&nbsp;</p>



<p>“At the end of the day, the research we are trying to do aims to find out how this is impacting gut health. Research continues to show the importance of gut health. If you don't have a healthy gut, it affects the brain, it affects the liver and so many other tissues. So even imagining that the microplastics are doing something in the gut, that chronic exposure could lead to systemic effects,” Castillo concluded.</p>



<h2 class="wp-block-heading" id="h-health-impacts-associated-with-microplastic-ingestion">Health impacts associated with microplastic ingestion</h2>



<p>The extent and severity of health risks associated with microplastic exposure are still under investigation. More research is needed to determine the precise implications and to understand the mechanisms through which microplastics can affect human health. Here are some of the potential impacts:</p>



<h3 class="wp-block-heading" id="h-physical-damage">Physical damage</h3>



<p>Microplastics can cause physical damage to tissues, especially if they are sharp or angular. They may irritate or perforate the tissues of the digestive tract.</p>



<h3 class="wp-block-heading" id="h-chemical-exposure">Chemical exposure</h3>



<p>Microplastics can carry pollutants, including toxic chemicals like heavy metals, polychlorinated biphenyls (PCBs), and bisphenol A (BPA), which can leach into the body. These substances are known to have carcinogenic, developmental, and endocrine-disrupting effects.</p>



<h3 class="wp-block-heading" id="h-inflammation-and-immune-response">Inflammation and immune response</h3>



<p>There is evidence that microplastics can trigger inflammatory responses or affect the immune system. Small particles can be mistaken by the body as harmful invaders, leading to an immune response.</p>



<h3 class="wp-block-heading" id="h-potential-for-bioaccumulation">Potential for bioaccumulation</h3>



<p>Microplastics might accumulate in the body and organs over time, especially since they are not biodegradable. The long-term health effects of this accumulation are not yet fully understood.</p>



<h3 class="wp-block-heading" id="h-effects-on-gut-health">Effects on gut health</h3>



<p>Research has suggested that microplastics can affect the gut microbiota, potentially leading to gastrointestinal issues or impacting nutrient absorption.</p>



<p>The study is published in the journal <a href="http://dx.doi.org/10.1289/EHP1343" target="_blank" rel="noreferrer noopener"><em>Environmental Health Perspectives</em></a><em>.</em></p>



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



<p>Like what you read? <a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.</p>



<p>Check us out on <a href="https://www.earth.com/earthsnap/" target="_blank" rel="noreferrer noopener">EarthSnap</a>, a free app brought to you by <a href="https://www.linkedin.com/in/eric-ralls/" target="_blank" rel="noreferrer noopener">Eric Ralls</a> and Earth.com.</p>



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

Microplastics migrate from the gut to other organs

Every day, microplastics are making their way into our bodies...

<p>Dreams have been a source of wonder and speculation for millennia. Are they cryptic messages from beyond? Or are our brains merely firing off random patterns as we sleep? What if they change our perceptions?</p>



<p>As it turns out, science is starting to lean away from the "random patterns" idea. Researchers are discovering compelling evidence that our <a href="https://www.earth.com/news/dreams-keep-the-brain-from-becoming-too-familiar-with-everyday-life/" target="_blank" rel="noreferrer noopener">dreams</a> play a far more important role in our lives than we might have thought.</p>



<p>Think back to your last few nights. What did your dreams hold? Triumphs? Terrors? Perhaps just those odd, fleeting moments that fade with the morning light. At the recent Cognitive Neuroscience Society (<a href="https://www.cogneurosociety.org" target="_blank" rel="noreferrer noopener">CNS</a>) annual meeting, experts like Remington Mallett from the <a href="https://www.umontreal.ca/en/" target="_blank" rel="noreferrer noopener">University of Montréal</a> shared that no matter the content, our dreams can profoundly influence the way we think, feel, and experience the world around us.</p>



<h2 class="wp-block-heading" id="h-are-dreams-random-or-perceptions-of-the-self">Are dreams random or perceptions of the self?</h2>



<p>For ages, the question of "Why do we <a href="https://www.earth.com/news/meaningful-dream-experiences-can-boost-your-work-productivity/" target="_blank" rel="noreferrer noopener">dream</a>?" has puzzled philosophers, artists, and scientists alike. One of the biggest challenges, according to Mallet, is the difficulty in studying such a subjective, internal phenomenon. But the tide is starting to shift:</p>



<p>"Because we don't know much about dreams, it is hard to estimate their full impact on our waking lives," says Mallett. "But current results suggest that indeed dreams influence our waking experiences."</p>



<p>So, if your dreams aren't just a jumble of nonsense, what <em>are</em> they, and how are they making a difference?</p>



<h2 class="wp-block-heading" id="h-dreams-insomnia-and-perception">Dreams, insomnia and perception</h2>



<p>If you suffer from insomnia, you're intimately familiar with that frustrating sense of exhaustion that persists even after what seems like a long night of sleep. This begs the question: could how you <em>think</em> you slept be misaligned with the reality of your sleep patterns?</p>



<p>Claudia Picard-Deland and her team investigated this concept by studying "good sleepers." Their method involved waking participants multiple times throughout the night to record their self-reported state (awake or asleep) and the presence or absence of <a href="https://www.earth.com/news/strange-dreams-help-us-organize-our-experiences/" target="_blank" rel="noreferrer noopener">dream</a> activity. </p>



<p>The findings were surprising: Participants often reported feeling awake while measurements clearly indicated they were asleep. This phenomenon was most common in the earlier, lighter stages of sleep.</p>



<p>Moreover, when participants were able to recall their dreams, they reported an overall feeling of having slept more deeply. This effect was strongest when the remembered dreams were particularly vivid or immersive.</p>



<h2 class="wp-block-heading" id="h-implications-of-the-findings">Implications of the findings</h2>



<p>For those who struggle with insomnia, understanding that they might be getting more sleep than they realize could significantly reduce anxiety surrounding sleep. This newfound awareness has the potential to break a negative feedback loop fueled by sleep-related worry.</p>



<p>Picard-Deland's research hints at the possibility of "<a href="https://www.earth.com/news/two-genes-control-genes/" target="_blank" rel="noreferrer noopener">dream</a>-based" therapies. The idea is that by learning techniques to have more vivid or memorable dreams, people could train themselves to feel like they've had a more restful sleep, improving their overall sense of well-being.</p>



<h2 class="wp-block-heading" id="h-the-power-of-lucid-dreaming">The power of lucid dreaming</h2>



<p>What if you could actively take part in your dreams and even send messages to the outside world? Well, some people can, and Saba Al-Youssef of <a href="https://www.sorbonne-universite.fr" target="_blank" rel="noreferrer noopener">Sorbonne Université</a> is uncovering what we can learn from them.</p>



<p>Lucid dreaming happens when you're asleep but become aware that you're dreaming. This grants you a remarkable level of control over your dream world. Al-Youssef's research uses the ability of lucid dreamers to move facial muscles as a real-time communication tool.</p>



<p>"<a href="https://www.earth.com/news/angry-dreams/" target="_blank" rel="noreferrer noopener">Dreams</a> are a hidden world to which we have no direct access," explains Al-Youssef. "The capacity of lucid dreamers to communicate with us in real time gives us side door access to dreams, at least knowing when a specific event is happening."</p>



<h2 class="wp-block-heading" id="h-manipulating-dreams-for-better-living">Manipulating dreams for better living</h2>



<p>The research presented by both Picard-Deland and Al-Youssef hints at the possibility of directly influencing our dreams, a key concept with wide-ranging potential for improving our well-being. Controlled dream manipulation offers several key benefits.</p>



<p>The ability to purposefully modify aspects of dreams would give scientists unprecedented control in their experiments. This could lead to faster, more accurate discoveries about how dreams work and their impact on our waking lives.</p>



<p>Nightmares go beyond mere annoyance; they can be a source of profound distress and even trauma. By understanding the mechanisms behind dream generation, researchers hope to develop methods for altering dreams in real-time. This could mean turning a terrifying nightmare into a neutral or even positive experience.</p>



<h2 class="wp-block-heading" id="h-dream-manipulation-and-perceptions">Dream manipulation and perceptions</h2>



<p>Dreams often feel like a kaleidoscope of our lives – fragments of experiences, perceptions, and emotions woven together into strange yet captivating narratives. This unique quality makes dreams a potentially invaluable tool for both self-discovery and therapeutic intervention.</p>



<p>If we can learn to intentionally shape or influence our dreams, we might unlock:</p>



<h3 class="wp-block-heading" id="h-understanding-the-mind">Understanding the mind</h3>



<p>By manipulating specific aspects of our dreams, researchers could gain insights into the complex ways our minds process information, store memories, and generate emotions. This knowledge could translate into better models of the brain and more effective treatments for cognitive disorders.</p>



<h3 class="wp-block-heading" id="h-targeted-therapy">Targeted therapy</h3>



<p>Individuals struggling with conditions like PTSD, anxiety, or depression may benefit from tailored dream manipulation techniques. Therapists could potentially guide patients towards having dreams that promote emotional processing, help work through trauma, or reinforce positive coping mechanisms.</p>



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



<p>Even beyond clinical settings, dream manipulation could offer new ways to boost creativity, enhance problem-solving, and foster a greater sense of self-awareness. Imagine being able to cultivate dreams that leave you feeling inspired, mentally refreshed, and better equipped to navigate life's challenges.</p>



<h2 class="wp-block-heading" id="h-linking-dreams-and-perceptions">Linking dreams and perceptions</h2>



<p>It's easy to dismiss dreams as fleeting nonsense that vanishes with the morning light. However, this research suggests it's high time to reconsider that attitude. Dreams aren't just a quirky form of nocturnal entertainment – they hold a wealth of potential insights into your inner workings, how you rest, and even your overall mental health.</p>



<p>Dreams directly mirror the way we experience the world around us. This means that the themes, emotions, and patterns that emerge in your dreams likely tell a deeper story about how you think, feel, and navigate life in your waking hours.</p>



<p>Imagine if you could learn to understand the language of your dreams. Your dreams could highlight patterns and blind spots in your thinking, emotions, or behavior. This newfound awareness could be a catalyst for self-improvement and growth.</p>



<p>Moreover, paying attention to your dreams might change your perception of your sleep quality. You might realize you're sleeping better than you thought. </p>



<p>Dream interpretation techniques could become a tool for emotional processing, stress reduction, and even creative problem-solving within your subconscious mind.</p>



<p>The science of dreams is still evolving. But one thing is crystal clear: those journeys you take as you sleep have the power to spill over into your reality in fascinating ways.</p>



<p>The study is part of the symposium <a href="https://www.cogneurosociety.org/symposia/?sym=28" target="_blank" rel="noreferrer noopener">Into the Night: The Cognitive Neuroscience of Dreaming</a>.</p>



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



<p>Like what you read? <a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.&nbsp;</p>



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



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

How dreams influence our perceptions

Dreams have been a source of wonder and speculation for...

<p>Giant <a href="https://www.earth.com/news/pandas-can-thrive-in-less-than-perfect-environments/" target="_blank" rel="noreferrer noopener">pandas</a>, with their instantly recognizable black and white fur, are symbols of conservation and adored across the globe. But hidden within their bamboo-filled mountain homes lies a fascinating secret: sometimes, pandas are born with rich brown fur.</p>



<p>This rare coloration has baffled scientists for years, but a recent groundbreaking study has finally shed some light on this captivating mystery.</p>



<h2 class="wp-block-heading" id="h-the-story-of-brown-pandas">The story of brown pandas</h2>



<p>Let's meet a few of the famous brown <a href="https://www.earth.com/news/giant-pandas-gut-bacteria-turn-nutrient-poor-food-into-fat/" target="_blank" rel="noreferrer noopener">pandas</a>:</p>



<h3 class="wp-block-heading" id="h-dan-dan">Dan Dan</h3>



<p>Dan Dan holds the title of the original brown panda celebrity, having a unique and captivating history. Rescued as a sickly cub in 1985 from the wild terrains of the Qinling Mountains, Dan Dan was immediately recognized for its distinctive brown fur, a rarity among the predominantly black and white giant pandas. </p>



<p>The rescue brought it to Xi'an Zoo, where she lived under the care of conservationists until its death in 2000. Dan Dan not only sparked initial interest in the phenomenon of brown pandas but also paved the way for further scientific inquiry into the genetic diversity within panda populations.</p>



<h3 class="wp-block-heading" id="h-qizai">Qizai</h3>



<p>Qizai, whose name resonates in the field of wildlife conservation, is currently the only brown <a href="https://www.earth.com/news/panda-habitats-shrinking-splintered/" target="_blank" rel="noreferrer noopener">panda</a> living in captivity. His story began similarly to Dan Dan's when he was rescued as a vulnerable cub in 2009 from the Foping National Nature Reserve. His distinct brown-and-white coat marked him as an exceptional case for genetic study. </p>



<p>Qizai’s existence provides researchers with a living subject to investigate the genetic mutations that lead to this unusual pigmentation. His life in captivity, much like Dan Dan's, offers invaluable insights into the care, breeding, and conservation of this rare variant of the species. </p>



<p>Moreover, studying Qizai helps scientists understand how these genetic traits can be passed on, observed in his offspring, and what this means for the future of pandas with this rare coloration.</p>



<h2 class="wp-block-heading" id="h-the-cause-of-brown-pandas">The cause of brown pandas</h2>



<p>For many years, scientists have been scratching their heads over the origin of brown pandas. Two main explanations dominated the conversation:</p>



<p>One theory suggested that <a href="https://www.earth.com/news/inbreeding-can-actually-be-beneficial-for-some-species-in-the-long-run/" target="_blank" rel="noreferrer noopener">inbreeding</a> within isolated panda populations might be causing the brown fur variation. Inbreeding happens when individuals within a small gene pool mate with close relatives. This can sometimes lead to the emergence of rare genetic traits, but it also increases the risk of health problems in offspring.</p>



<p>Another theory pointed towards environmental factors as a possible trigger. Perhaps something specific in the habitat of these brown pandas, like diet or unique elements present in the Qinling Mountains, could be influencing fur color.</p>



<p>However, researchers at the <a href="http://english.ioz.cas.cn" target="_blank" rel="noreferrer noopener">Chinese Academy of Sciences' Institute of Zoology</a> in Beijing threw a plot twist into this scientific whodunit. Their groundbreaking study suggests that neither inbreeding nor environmental factors might be the sole culprits behind brown fur. This discovery opens up new avenues for understanding this fascinating coloration in pandas.</p>



<h2 class="wp-block-heading" id="h-panda-genes-involving-brown-fur">Panda genes involving brown fur</h2>



<p>Scientists delved into the fascinating world of panda genetics and made a key discovery. They pinpointed a specific gene called Bace2 that seems to play a crucial role in determining fur color. Here's how it works:</p>



<h3 class="wp-block-heading" id="h-recessive-traits">Recessive traits</h3>



<p>Genes come in pairs, and sometimes one version of a gene (like the one for brown fur) can be "recessive." This means the trait only shows up if a panda gets two copies of the recessive version, one from each parent. Black-and-white pandas might be carrying a single copy of the recessive brown fur gene without showing any outward signs.</p>



<h3 class="wp-block-heading" id="h-melanosomes">Melanosomes</h3>



<p>To understand why brown pandas are brown, we need to talk about melanosomes. These little structures inside cells are responsible for producing melanin – the pigment that gives hair and skin its color. Brown pandas have fewer melanosomes and they tend to be smaller, leading to less pigment and a lighter fur color.</p>



<h2 class="wp-block-heading" id="h-solving-the-mystery-of-brown-pandas">Solving the mystery of brown pandas</h2>



<p>By carefully analyzing Qizai's family history and preserved tissue samples from Dan Dan, scientists overturned some long-held assumptions:</p>



<h3 class="wp-block-heading" id="h-challenging-inbreeding-theories">Challenging inbreeding theories</h3>



<p>Qizai's case is particularly intriguing because despite his brown fur, both his parents were typical black-and-white pandas. Additionally, his son also exhibits the classic panda coloration. This strongly suggests that the brown fur trait isn't necessarily linked to inbreeding, but instead might be a naturally occurring variation within panda populations, just like different hair colors in humans.</p>



<h3 class="wp-block-heading" id="h-the-qinling-connection">The Qinling connection </h3>



<p>An interesting pattern has emerged: most documented brown pandas seem to originate in the Qinling Mountains. This leads researchers to hypothesize that something unique to this environment – perhaps factors like specific minerals in the soil or elements in their diet – could be interacting with the Bace2 gene, triggering the expression of brown fur.</p>



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



<p>While the discovery of the cause behind brown pandas is fascinating all on its own, it also carries significant implications for the conservation of this beloved species:</p>



<p>The research serves as a powerful reminder that there's a lot we still don't know about the genetic makeup of giant pandas. The existence of unexpected variations, like the brown fur trait, underscores the importance of continued research to fully understand the genetic health and diversity of panda populations. This information is crucial for their long-term survival.</p>



<p>With a deeper understanding of the brown fur genetics, scientists might be able to selectively breed brown pandas in controlled environments. Introducing this variation back into the population could potentially increase overall genetic diversity, making pandas more resilient to disease and environmental pressures.</p>



<p>While there are still many questions to answer about brown pandas, this research represents an important first step. Further study into this rare color variation could open up a whole new world of understanding giant pandas and aid in their ongoing conservation. </p>



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



<p>Like what you read? <a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.&nbsp;</p>



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



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

Some giant pandas are born with brown fur instead of black

Giant pandas, with their instantly recognizable black and white fur,...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="0ynNMYkMKa-2340414-12187" type="single"]</div>



<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...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="G9bUoxcjr4-2511624-12187" type="single"]</div>



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



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



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



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



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



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



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

Flu viruses are more flexible than expected

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

<div class="wp-block-sendtonews-playerselector">[sendtonews key="3upvlAaHgO-2256633-12187" type="single"]</div>



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



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



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



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



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



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



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

Lake Trasimeno in Central Italy

[sendtonews key="3upvlAaHgO-2256633-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="LvS8v8bp9z-2564889-12187" type="single"]</div>



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



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



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



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



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



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



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

Detecting mercury contamination with the tap of a finger

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

<div class="wp-block-sendtonews-playerselector">[sendtonews key="iuA5mpp3jv-1641775-12187" type="single"]</div>



<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>



<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>

Kainji Lake in north central Nigeria

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

<div class="wp-block-sendtonews-playerselector">[sendtonews key="QGPzYnXEtN-1712599-12187" type="single"]</div>



<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><span style="font-weight: 400;">Umnak Island is seen here in the </span>Image of the Day<span style="font-weight: 400;"> taken by the </span><a href="https://earthobservatory.nasa.gov/"><span style="font-weight: 400;">NASA Earth Observatory.</span></a> Umnak Island is<span style="font-weight: 400;"> the third largest in the Aleutian Island chain. </span><span style="font-weight: 400;">The Island is covered in <a href="https://www.earth.com/news/volcanoes-erupt-next/">volcanoes</a>, including Mount Okmok on its northern end, which erupted in 2008.</span><i></i></p>


Umnak Island in the Aleutian Islands

<span style="font-weight: 400;">Autumn foliage in <a href="https://www.earth.com/video/southern-maine-usa/">Maine</a> is featured here in today’s </span><b>Image of the Day</b><span style="font-weight: 400;"> from the </span><a href="https://earthobservatory.nasa.gov/"><span style="font-weight: 400;">NASA Earth Observatory</span></a><span style="font-weight: 400;">. </span><span style="font-weight: 400;">It’s that time of year again when the leaves change colors before falling off for the winter. Here in Baxter State Park can be seen a beautiful array of reds, oranges, tans, and greens.</span><i></i>