<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

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

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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



<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>

Storms dumped record rainfall in the United Arab Emirates

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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



<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 luminous galaxy NGC 3783 and a blue giant star

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

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



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



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



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



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



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



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



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



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



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



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



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



<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>

Sediment swirling in the Gulf of Alaska

<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 an astronaut view of the Aladaghlar Mountains in northwestern Iran. These mountains are known for their strikingly colorful landscapes, which make them stand out among other mountain ranges.</p>



<p>"Ridges cast shadows in the valleys and other low elevation areas, creating a three-dimensional appearance. Human alterations to the landscape are most evident in riverbeds, where the even topography is easier to build on and navigate," said NASA.</p>



<p>"Natural processes over millions of years have folded rock layers of various compositions and colors into the curved patterns seen here. These folds are produced by tectonic forces operating along the convergent plate boundary of the Arabia and Eurasia plates. The convergence of these tectonic plates causes uplift, folding, and deformation of the colorful rock layers, and subsequent erosion exposes them."</p>



<p>One of the most remarkable features of the Aladaghlar Mountains is the vivid coloration of their slopes. The name "Aladaghlar" translates to "Colorful Mountains," which is a testament to their unique appearance. </p>



<p>The Aladaghlar Mountains are part of a larger ecosystem that includes forests, meadows, and rivers, contributing to a rich biodiversity. The region supports a variety of wildlife, including several species that are unique to the area. The diverse wildlife add to the natural beauty and ecological importance of these <a href="https://www.earth.com/news/how-and-why-do-mountains-form-new-theories-for-an-age-old-mystery/">mountains</a>.</p>



<p>In addition to their natural appeal, the Aladaghlar Mountains hold cultural significance. The region has a rich history, with evidence of ancient civilizations and historical sites. Local communities have their unique cultures and traditions, which have been influenced by the natural environment of the mountains.</p>



<p>Image Credit: NASA Earth Observatory&nbsp;</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><em>—--</em></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 <a href="https://www.earth.com/" target="_blank" rel="noreferrer noopener">Earth.com</a>.</p>

The Aladaghlar Mountains of northwestern Iran

<p>Pyrrolizidine alkaloids, complex and toxic compounds produced by various plant species, have historically posed significant risks to cattle due to their lethal nature. Despite their toxicity and the clear signals from plants that contain these alkaloids discouraging consumption, bella <a href="https://www.earth.com/news/moths-may-struggle-to-move-in-response-to-climate-change/" target="_blank" rel="noreferrer noopener">moths</a> (<em>Utetheisa ornatrix</em>) have uniquely adapted to not only consume these substances but also utilize them as a defense mechanism and a means to attract mates.</p>



<h2 class="wp-block-heading" id="h-genetic-adaptations-of-bella-moths-nbsp">Genetic adaptations of bella moths&nbsp;</h2>



<p>In a new study led by the <a href="https://www.floridamuseum.ufl.edu/" target="_blank" rel="noreferrer noopener">Florida Museum of Natural History</a>, scientists have explored the genetic adaptations that allow bella moths to thrive on a diet rich in these dangerous compounds.&nbsp;</p>



<p>The research, which involved sequencing the bella moth genome and analyzing genetic data from over 150 museum specimens, some over a century old, aimed to discover the evolutionary origins of bella moths and their close relatives, as well as the development of their distinctive <a href="https://www.earth.com/video/butterflies-wing-patterns-colors/" target="_blank" rel="noreferrer noopener">wing patterns</a>.</p>



<p>“We’ve managed to show that you can use museum specimens to answer genetic questions that normally require complicated laboratory techniques,” explained study co-author Andrei Sourakov, collections coordinator at the <a href="https://www.floridamuseum.ufl.edu/mcguire/" target="_blank" rel="noreferrer noopener">McGuire Center for Lepidoptera and Biodiversity</a>. Sourakov, who has dedicated 15 years to studying bella moths, emphasized the significance of genome sequencing in advancing our understanding of these resilient insects.</p>



<h2 class="wp-block-heading" id="h-unique-survival-strategy-of-bella-moths">Unique survival strategy of bella moths</h2>



<p>The findings reveal that bella moths, which inhabit regions across eastern North America, Central America, and the Caribbean, exhibit a unique survival strategy by being conspicuously visible during the day instead of hiding from predators.&nbsp;</p>



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



<p>Their vibrant wing colors serve as a warning about their toxicity, effectively deterring potential <a href="https://www.earth.com/news/predators-help-prevent-biodiversity-loss/" target="_blank" rel="noreferrer noopener">predators</a> such as spiders and birds.</p>



<p>“Banana spiders will cut them out of their webs,” Sourakov said, adding that wolf spiders and birds will avoid them. “When caught, they produce foaming liquid that tastes bad made almost entirely out of alkaloids.”</p>



<h3 class="wp-block-heading" id="h-attracting-mates">Attracting mates</h3>



<p>This defense mechanism is further found during <a href="https://www.earth.com/news/male-moths-use-an-aphrodisiac-during-mating-to-feel-macho/" target="_blank" rel="noreferrer noopener">mating</a>, where females emit a plume of alkaloid-rich aerosols to attract males.&nbsp;</p>



<p>The mating process involves the male moth transferring not only sperm but additional alkaloids to the female, which she uses to protect her eggs.</p>



<h2 class="wp-block-heading" id="h-complex-evolutionary-process-nbsp">Complex evolutionary process&nbsp;</h2>



<p>The study not only sheds light on the unique dietary adaptations of bella moths but also underscores the broader implications of their survival tactics. The discovery that bella moths possess multiple copies of the gene responsible for their alkaloid detoxification enzyme suggests a complex evolutionary process that may have involved gene duplication, a phenomenon observed in various other species as well.</p>



<p>According to the researchers, the interaction with pyrrolizidine alkaloids could be a key factor behind the bella moth’s unusually long lifespan, as the stress imposed by these toxins may activate biological mechanisms that contribute to <a href="https://www.earth.com/news/certain-stress-boost-longevity/" target="_blank" rel="noreferrer noopener">longevity</a>.</p>



<p>“Certain types of stress on biological systems result in a longer lifespan. It could be that the interaction bella moths have with alkaloids is not only the reason why it makes sense for them to live long lives, but also one of the mechanisms behind it,” Sourakov speculated.</p>



<p>This study, published in the journal <a href="http://dx.doi.org/10.1073/pnas.2319726121" target="_blank" rel="noreferrer noopener"><em>Proceedings of the National Academy of Sciences</em></a><em>,</em> both deepens our understanding of the complex interplay between bella moths and their toxic environment and opens new avenues for research into how other species adapt to and exploit toxic substances within their ecosystems.</p>



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



<p>Bella moths are strikingly colored moths found primarily in the Americas. Their vibrant wings are a mix of pink, white, and yellow hues with black spots, serving as a warning to predators about their toxicity. This toxicity is derived from their larval diet of plants in the Crotalaria genus, which contain poisonous alkaloids that the larvae retain into adulthood.</p>



<p>The bella moth's life cycle is closely intertwined with its host plants. The female moth lays eggs on the underside of leaves, which hatch into larvae that feed on the toxic leaves, gaining their own chemical defenses against predators. This adaptation showcases a fascinating example of coevolution between the bella moth and the plants it depends on.</p>



<p>In addition to their ecological role, bella moths contribute to their ecosystem by participating in pollination. Their bright coloring not only warns predators but also attracts the attention of researchers and nature enthusiasts, making them a subject of interest in studies of evolutionary biology and ecology.</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>-----<br></p>

Bella moths use toxins to deter predators and attract mates

Pyrrolizidine alkaloids, complex and toxic compounds produced by various plant...

<p>While causing significant disruptions across various aspects of life, the <a href="https://www.earth.com/news/nasal-cells-protect-children-against-severe-covid-19/" target="_blank" rel="noreferrer noopener">COVID-19 </a>pandemic led to only "modest" developmental delays among infants and children up to five years old. This is the conclusion of a new study led by the <a href="https://www.hopkinsmedicine.org/johns-hopkins-childrens-center" target="_blank" rel="noreferrer noopener">Johns Hopkins Children’s Center</a>.</p>



<p>The experts closely examined the potential correlation between pandemic-induced changes in daily life and children’s developmental outcomes.</p>



<h2 class="wp-block-heading" id="h-evaluating-child-development">Evaluating child development </h2>



<p>The researchers utilized data from the <a href="https://www.site.chadis.com/" target="_blank" rel="noreferrer noopener">Comprehensive Health and Decision Information System</a> (CHADIS) - a web-based platform where caregivers report on child development across over 5,000 pediatric practices in 48 U.S. states.</p>



<p>The study was based on the Ages and Stages Questionnaire-3 (ASQ-3). This caregiver-completed assessment forms a routine part of pediatric care, evaluating child development in areas such as communication, problem-solving, and personal-social skills, along with fine and gross motor skills.</p>



<h2 class="wp-block-heading" id="h-developmental-delays-in-children-nbsp">Developmental delays in children&nbsp;</h2>



<p>The findings suggested slight decreases in communication, <a href="https://www.earth.com/news/encouragement-helps-dogs-improve-at-problem-solving-tasks/" target="_blank" rel="noreferrer noopener">problem-solving</a>, and personal-social skills, yet no notable changes were observed in the motor skills domains.&nbsp;</p>



<p>“We found, overall, that while there are some changes, the sky is not falling, and that is a really important and reassuring finding,” said corresponding author Sara Johnson, the&nbsp; director of the <a href="https://ralescenter.hopkinschildrens.org/" target="_blank" rel="noreferrer noopener">Rales Center for the Integration of Health and Education</a> at Johns Hopkins Children’s Center.</p>



<p>The backdrop of the research is the extensive disruption wrought by the COVID-19 pandemic and related <a href="https://www.earth.com/news/nature-improved-mental-health-of-children-during-lockdown/" target="_blank" rel="noreferrer noopener">lockdowns</a>, which upended routines for families globally - shuttering schools, moving work to homes, and reducing social and physical activities. This led to increased levels of stress, anxiety, and social isolation, impacting both physical and mental health across all age groups.</p>



<h2 class="wp-block-heading" id="h-pandemic-linked-to-modest-developmental-delays">Pandemic linked to modest developmental delays</h2>



<p>Despite broader concerns, the research team, upon analyzing developmental data from 50,205 children aged between 0 and 5 years, noted only modest developmental delays, primarily in communication and problem-solving skills.&nbsp;</p>



<p>These effects were consistent across age groups, from infants to older children, suggesting that increased caregiver time at home may have mitigated more significant impacts.</p>



<h2 class="wp-block-heading" id="h-pandemic-related-stress-over-developmental-delays">Pandemic-related stress over developmental delays </h2>



<p>Additionally, the study explored whether pandemic-related stresses led caregivers to worry more about their children’s <a href="https://www.earth.com/news/poverty-impacts-brain-development-in-children/" target="_blank" rel="noreferrer noopener">development</a>, finding only a slight increase in concerns during the pandemic compared to pre-pandemic times.</p>



<p>While the findings provide some reassurance about children's resilience to profound disruptions, the long-term implications of these modest developmental delays remain uncertain.&nbsp;</p>



<p>“It is important for us to continue to keep an eye on kids of all ages in terms of development, so we can understand whether these changes have longer-term implications for children or if new challenges emerge as children age,” explained Johnson.</p>



<h2 class="wp-block-heading" id="h-broader-implications-of-the-study">Broader implications of the study</h2>



<p>Looking forward, the insights from this study are pivotal for preparing for future <a href="https://www.earth.com/news/living-alone-in-america-an-escalating-public-health-crisis/" target="_blank" rel="noreferrer noopener">public health crises</a>. They underscore the necessity of enhancing the clinical infrastructure to support developmental and behavioral pediatric services, ensuring that children's developmental needs are adequately met both now and in the future.</p>



<p>The study acknowledges certain limitations, such as excluding variables like prenatal substance abuse and the exclusion of preterm infants, which might skew the understanding of the pandemic’s full impact on developmental outcomes.&nbsp;</p>



<p>Moreover, the potential for selection bias among participating healthcare providers in the CHADIS database could affect the generalizability of the findings. These factors underscore the need for continued research to fully ascertain the developmental consequences of the COVID-19 pandemic on young children.</p>



<h2 class="wp-block-heading" id="h-how-did-the-pandemic-impact-children-s-lives">How did the pandemic impact children's lives?</h2>



<p>The pandemic highlighted and often exacerbated existing disparities in access to resources, support, and opportunities for children, influencing their developmental trajectories in profound ways.</p>



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



<p>School closures and the shift to remote learning disrupted traditional educational experiences, leading to learning losses for many children. This was especially pronounced in communities with limited access to technology or where students received less support at home.</p>



<h3 class="wp-block-heading" id="h-social-development">Social development</h3>



<p>With social distancing measures and lockdowns, many children missed out on crucial aspects of social development. The lack of in-person interactions with peers during critical developmental periods affected their social skills and emotional intelligence.</p>



<h3 class="wp-block-heading" id="h-mental-health">Mental health</h3>



<p>The pandemic has been linked to increased rates of anxiety, depression, and other mental health issues in children. The isolation, uncertainty, and changes in routine contributed to stress and emotional distress.</p>



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



<p><a href="https://www.earth.com/news/childrens-inactivity-remains-a-problem-after-the-pandemic/" target="_blank" rel="noreferrer noopener">Physical activity</a> levels dropped for many children due to restrictions on outdoor play and sports. This change has implications for physical health, including increased rates of <a href="https://www.earth.com/news/childhood-obesity-rates-spiked-during-the-pandemic/" target="_blank" rel="noreferrer noopener">obesity</a> and related health conditions.</p>



<h3 class="wp-block-heading" id="h-safety-and-abuse">Safety and abuse</h3>



<p>For some children, staying at home meant an increased risk of exposure to domestic violence and abuse. The protective environments provided by schools and community programs were less accessible.</p>



<h3 class="wp-block-heading" id="h-nutritional-access">Nutritional access</h3>



<p>Many children rely on schools for nutritious meals. School closures impacted their access to these critical resources, increasing food insecurity among vulnerable populations.</p>



<p>The study is published in the <a href="https://www.jpeds.com/" target="_blank" rel="noreferrer noopener"><em>Journal of Pediatrics</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>-----<br></p>

COVID-19 pandemic led to ‘modest’ developmental delays in children

While causing significant disruptions across various aspects of life, the...

<p>The tropical belt braces for unprecedented heat this summer, with conditions ripe for new records in temperature and humidity. This forecast, based on new research from the <a href="https://www.berkeley.edu" target="_blank" rel="noreferrer noopener">University of California, Berkeley</a>, underscores the escalating impact of climate change coupled with an intense <a href="https://www.earth.com/news/el-nino-event-may-push-earth-towards-its-hottest-year-ever/" target="_blank" rel="noreferrer noopener">El Niño</a>.</p>



<h2 class="wp-block-heading" id="h-why-humidity-makes-heat-dangerous">Why humidity makes heat dangerous</h2>



<p>Our bodies rely heavily on sweating to stay cool. When sweat evaporates from our skin, it carries heat away with it, lowering our internal temperature. However, in high humidity, the air is already heavily laden with water vapor. </p>



<p>This makes it much harder for our sweat to evaporate, reducing its cooling effect. Essentially, high humidity prevents our natural temperature regulation process from working efficiently, making it much more difficult for our bodies to stay cool in hot conditions. </p>



<p>"If you can't cool your body to below 98.6°F, or 37°C, then you'll die," said study co-author Professor William Boos. "Sweat is the main way we have to cool ourselves when it gets hot. So if sweating will not allow you to cool below your core body temperature, that's the survivability limit," explained William Boos, a UC Berkeley professor of earth and planetary science.</p>



<h2 class="wp-block-heading" id="h-el-nino-and-global-warming-lead-to-tropical-humidity">El Niño and global warming lead to tropical humidity</h2>



<p>The ongoing rise in Earth's average temperature, known as global warming, is increasing the amount of water vapor in the atmosphere. This is because warmer air can hold more moisture.</p>



<p><a href="https://www.earth.com/news/forecasters-warn-of-weather-chaos-as-el-nino-arrives-early/" target="_blank" rel="noreferrer noopener">El Niño</a>, a natural weather pattern that causes warming in the tropical Pacific Ocean, adds even more heat to the system. This further boosts evaporation, sending large amounts of warm, moist air into the upper atmosphere. </p>



<p>Eventually, some of this moisture descends back to the surface, creating those hot, muggy conditions along with intense thunderstorms that don't always bring lasting relief from the heat.</p>



<p>"When <a href="https://www.earth.com/news/satellite-detects-early-warning-signs-of-an-el-nino-event/" target="_blank" rel="noreferrer noopener">El Niño</a> happens," Boos explains, "the upper atmosphere gets warmer, which means that these downdrafts won't be as cold. So your surface overall will move to a higher heat and humidity content."</p>



<h2 class="wp-block-heading" id="h-predicting-tropical-heat-and-humidity">Predicting tropical heat and humidity</h2>



<p>Scientists at UC Berkeley developed a powerful tool to predict this summer's heat and humidity patterns. They combined statistical analysis with extensive historical climate data, spanning 45 years, and factored in the effects of both <a href="https://www.earth.com/news/el-nino-events-cost-the-global-economy-trillions-of-dollars/" target="_blank" rel="noreferrer noopener">El Niño</a> and ongoing global warming.</p>



<p>The analysis allowed the experts to isolate specific patterns where El Niño's temporary warming amplifies the longer-term warming trend caused by climate change. The result is a chilling prediction related to tropical heat and humidity: the tropics have a 7 in 10 chance of experiencing record-breaking heat and humidity levels.</p>



<p>It's important to note that this method doesn't pinpoint the exact weather on any given day. Instead, it reveals a large-scale trend for the tropical heat and humidity. This type of prediction is incredibly valuable because it gives governments, health organizations, and communities in these regions precious time to prepare and implement strategies to protect people, livestock, and crops from the dangerous effects of extreme heat and humidity.</p>



<h2 class="wp-block-heading" id="h-location-of-tropical-heat-and-humidity">Location of tropical heat and humidity</h2>



<p>Unfortunately, the tropical heat and humidity won't be evenly distributed. India, large swaths of Africa, Central and South America, Australia, and even Florida and Texas are most at risk. </p>



<p>"I think it provides a pretty good bar for the supercomputer models that are predicting climate on a seasonal time scale," said Boos. Some areas, like northern India, face a 50 percent chance of suffering record levels of extreme heat this summer.</p>



<p>This isn't a forecast to ignore. Organizations, from governments to humanitarian aid groups, can use this prediction to plan for increased medical needs and resources.</p>



<h2 class="wp-block-heading" id="h-preparation-for-tropical-heat-and-humidity">Preparation for tropical heat and humidity</h2>



<p>Preparing for tropical heat and humidity can significantly reduce the risk of heat-related illnesses and improve comfort. Here are some tips:</p>



<h3 class="wp-block-heading"><strong>Stay informed</strong></h3>



<ul>
<li><strong>Weather apps and alerts:</strong> Regularly check local weather forecasts and set up alerts for heat advisories on your smartphone or other devices.</li>



<li><strong>Local news:</strong> Follow local news for updates on weather conditions and safety advisories.</li>
</ul>



<h3 class="wp-block-heading">Adjust daily routines</h3>



<ul>
<li><strong>Avoid peak heat:</strong> Limit outdoor activities to early morning or late evening when temperatures are cooler.</li>



<li><strong>Dress appropriately:</strong> Wear lightweight, loose-fitting, and light-colored clothing to reflect sunlight and help maintain body temperature.</li>
</ul>



<h3 class="wp-block-heading">Optimize living spaces</h3>



<ul>
<li><strong>Cooling systems:</strong> Ensure air conditioning systems are well-maintained before the onset od predicted tropical heat and humidity. Consider installing energy-efficient window films or blackout curtains to reduce heat absorption.</li>



<li><strong>Fans and ventilation:</strong> Use fans to circulate air. Open windows during cooler periods if it is safe to do so and secure against insects.</li>



<li><strong>Insulation:</strong> Improve home insulation to keep the heat out and the cool in.</li>
</ul>



<h3 class="wp-block-heading">Hydration and diet</h3>



<ul>
<li><strong>Water intake:</strong> Increase your water intake to stay hydrated. Avoid alcohol and caffeine, as they can lead to dehydration.</li>



<li><strong>Cool foods:</strong> Eat smaller meals more frequently. Include fruits and vegetables that are high in water content, such as cucumbers, oranges, and watermelons.</li>
</ul>



<h3 class="wp-block-heading">Health management</h3>



<ul>
<li><strong>Recognize heat exhaustion signs:</strong> Know the signs of heat exhaustion, which include heavy sweating, weakness, cold, pale, and clammy skin, nausea or vomiting, and fainting.</li>



<li><strong>Emergency kit:</strong> Keep a well-stocked first aid kit that includes items like water, electrolytes, and basic medical supplies.</li>
</ul>



<h3 class="wp-block-heading">Community and vulnerable groups</h3>



<ul>
<li><strong>Check on others:</strong> Regularly check on elderly family members, neighbors, and others who may not have air conditioning or who spend much of their time alone.</li>



<li><strong>Community cooling centers:</strong> Utilize public spaces that are air-conditioned, like libraries or community centers, which may serve as cooling centers during heat waves.</li>
</ul>



<h3 class="wp-block-heading">Preparation for power outages</h3>



<ul>
<li><strong>Emergency plans:</strong> Have a plan in place for potential power outages. This includes having battery-powered fans, extra batteries, and portable chargers for devices.</li>



<li><strong>Backup power:</strong> Consider investing in a generator or solar-powered chargers for essential devices.</li>
</ul>



<h3 class="wp-block-heading">Pet safety</h3>



<ul>
<li><strong>Pet care:</strong> Ensure pets have adequate shade and water. Never leave pets in a closed vehicle, as tropical heat and humidity can rise to dangerous levels rapidly.</li>



<li><strong>Walking hours:</strong> Walk pets during cooler parts of the day to prevent overheating and burns from hot pavements.</li>
</ul>



<p>Preparation is key, especially in regions where extreme heat is not just uncomfortable but potentially <a href="https://www.earth.com/news/el-nino-drives-millions-of-children-into-hunger/" target="_blank" rel="noreferrer noopener">dangerous</a>.</p>



<p>The study is published in <em><a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023GL106990" target="_blank" rel="noreferrer noopener">Geophysical Research Letters</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>

Record-breaking tropical heat and humidity predicted this summer

The tropical belt braces for unprecedented heat this summer, with...

<p></p>
<div id="58e3ebce955a315103d39bd1" class="vdb_player vdb_58e3ebce955a315103d39bd158d96b98cd4fed198a0d2a49" vdb_params="m.embeded=cms_video_plugin_www.earth.com"  data-placeholder="//img.vidible.tv/prod/2019-03/28/5c9c6c297a51ca21121623de/5c9c6c4d9d15d700019d87c3_1920x1080_FES_v1.jpg?w=5760&#038;h=3600&#038;q=60">
    <script type="text/javascript" src="https://delivery.vidible.tv/jsonp/pid=58e3ebce955a315103d39bd1/vid=5c9c6c297a51ca21121623de/58d96b98cd4fed198a0d2a49.js?m.embeded=cms_video_plugin_www.earth.com"></script>
</div>
<p><br />
<span style="font-weight: 400;">Today&#8217;s </span><b>Video of the Day</b><span style="font-weight: 400;"> from the </span><a href="https://www.gatech.edu/"><span style="font-weight: 400;">Georgia Institute of Technology</span></a><span style="font-weight: 400;"> describes how honey bees make pollen stick together with bee spit and flower oil. </span></p>
<p><span style="font-weight: 400;">The researchers are using the unique properties of this mixture as a model to develop new adhesives.</span></p>
<p><span style="font-weight: 400;">“A bee encounters not just wet and humid environments but windy and dry surroundings as well, so its pollen pellet must counteract those variations in humidity while remaining adhered,” said Professor J. Carson Meredith. “Being able to withstand those kinds of changes in humidity is still a challenge for synthetic adhesives.”</span></p>
<p><span style="font-weight: 400;">The study is published in the journal </span><a href="https://www.nature.com/ncomms/"><i><span style="font-weight: 400;">Nature Communications</span></i></a><i><span style="font-weight: 400;">.</span></i></p>
<p><span style="font-weight: 400;">&#8212;</span></p>
<p><i><span style="font-weight: 400;">By </span></i><a href="http://csexton@earth.com"><i><span style="font-weight: 400;">Chrissy Sexton</span></i></a><i><span style="font-weight: 400;">, </span></i><a href="https://www.earth.com/staff/"><i><span style="font-weight: 400;">Earth.com</span></i></a><i><span style="font-weight: 400;"> Staff Writer</span></i></p>
<p><i><span style="font-weight: 400;">Video Credit: Georgia Institute of Technology</span></i></p>

Pollen pellets are inspiring new adhesives