<p>Today's <strong>Image of the Day</strong> from NASA Earth Observatory features thick haze over Thailand during the fire season. The photograph was captured on March 16, 2024 by the Visible Infrared Imaging Radiometer Suite (VIIRS) on the Suomi NPP satellite.</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. <a href="https://www.earth.com/image/intense-fire-season-in-mexico-is-part-of-a-worldwide-trend/" target="_blank" rel="noreferrer noopener">Fire activity</a> 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 <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA</a>.</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>According to NASA, the haze contains mixtures of small airborne particles called aerosols and gaseous pollutants such as nitrogen dioxide, sulfur dioxide, carbon monoxide, and ozone that degrade air quality.</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 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-causes-of-the-haze">Causes of the haze</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 <a href="https://www.earth.com/news/twenty-years-of-air-quality-improvement-erased-by-wildfires/" target="_blank" rel="noreferrer noopener">air quality</a> 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>



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

Haze pollution is an environmental crisis in Thailand

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

<p>Today's <strong>Image of the Day</strong> from NASA Webb Images features an extraordinary view of Uranus, the seventh planet from the sun in our solar system.&nbsp;</p>



<p>The photo reveals the rings, moons, and extreme seasons of the ice giant Uranus in unprecedented detail.&nbsp;</p>



<h2 class="wp-block-heading" id="h-dynamic-north-polar-cap-nbsp">Dynamic north polar cap&nbsp;</h2>



<p>“The Webb image exquisitely captures Uranus’s seasonal north polar cap, including the bright, white, inner cap and the dark lane in the bottom of the polar cap,” noted NASA.</p>



<p>Unlike Earth, where polar ice caps are formed by the freezing of water, Uranus's polar caps are thought to be primarily composed of a dense concentration of haze in the atmosphere.&nbsp;</p>



<p>The polar cap's haze is likely composed of methane particles. Methane in Uranus's atmosphere condenses into ice particles, which then create a thick haze that scatters sunlight, giving the polar cap its distinct bright appearance in visible and infrared light.</p>



<p>The polar cap is dynamic and changes over time. It becomes more prominent during the summer season of each pole. </p>



<p>As Uranus moves along its orbit, the cap's appearance transforms, with the haze becoming thicker and brighter when the pole is in continuous sunlight.</p>



<h2 class="wp-block-heading" id="h-the-zeta-ring-nbsp">The Zeta ring&nbsp;</h2>



<p>The inner and outer rings of Uranus are visible in the image, including Zeta - the innermost ring which is the faintest and most difficult to observe.</p>



<p>The <a href="https://www.earth.com/news/stunning-photo-of-uranus-and-its-rings-and-moons-captured-by-the-webb-telescope/" target="_blank" rel="noreferrer noopener">rings of Uranus</a> are primarily composed of narrow bands of particles, likely made of water ice mixed with a dark material. These rings are distinct from those of Saturn in that they are much darker and narrower.</p>



<p>The faintness and characteristics of the Zeta ring make it a subject of interest in studies related to the dynamics and composition of planetary ring systems.</p>



<h2 class="wp-block-heading" id="h-moons-of-uranus-nbsp">Moons of Uranus&nbsp;</h2>



<p>The <a href="https://science.nasa.gov/mission/webb/multimedia/images/" target="_blank" rel="noreferrer noopener">Webb</a> photo also features nine of the planet’s <a href="https://www.earth.com/news/nasa-four-uranus-moons-may-have-oceans-that-are-miles-deep/" target="_blank" rel="noreferrer noopener">moons</a>, which appear as blue dots surrounding the rings.&nbsp;</p>



<p>“Clockwise starting at 2 o’clock, they are: Rosalind, Puck, Belinda, Desdemona, Cressida, Bianca, Portia, Juliet, and Perdita. The orbits of these moons share the 98-degree tilt of their parent planet relative to the plane of the solar system,” noted NASA.</p>



<p>Uranus has 27 known moons, and they are divided into three main groups based on their orbits: the inner moons, the major moons, and the irregular moons.</p>



<p>The <a href="https://www.earth.com/news/uranus-moon-ariel-may-have-a-hidden-ocean/" target="_blank" rel="noreferrer noopener">moons</a> of Uranus are unique because they are named after characters from the works of William Shakespeare and Alexander Pope, rather than being named after figures from classical mythology, as is common for the moons of other planets.</p>



<h2 class="wp-block-heading" id="h-the-ice-giant-uranus-nbsp">The ice giant Uranus&nbsp;</h2>



<p>Uranus is classified as an "ice giant" because, unlike the gas giants Jupiter and Saturn, which are primarily composed of hydrogen and helium, Uranus has a significant proportion of "ices" in its composition.&nbsp;</p>



<p>In astronomical terms, ices refer to volatile substances like water, ammonia, and methane, which exist in solid or liquid forms at the low temperatures found in the outer solar system.</p>



<p>Uranus has a thick atmosphere of hydrogen and helium, but beneath that, it contains a large, dense mantle composed of these ices, along with rock and other heavier elements.&nbsp;</p>



<p>The term <a href="https://www.earth.com/news/diamond-rain-may-be-common-on-giant-icy-planets/" target="_blank" rel="noreferrer noopener">ice giant</a> differentiates Uranus (and Neptune, the other ice giant) from the larger gas giants, emphasizing the different chemical compositions and internal structures of these planets.</p>



<h2 class="wp-block-heading" id="h-climate-of-uranus-nbsp">Climate of Uranus&nbsp;</h2>



<p>Uranus has a unique and extreme climate, largely influenced by its unusual tilt, which causes the planet to rotate almost on its side. This tilt leads to extreme seasonal variations, with each pole experiencing 42 years of continuous sunlight followed by 42 years of darkness.&nbsp;</p>



<p>Even though it is closer to the sun than Neptune, Uranus is the coldest planet in the solar system, with temperatures plunging to as low as -224°C (-371°F). The reason for this is not fully understood, but it might be due to an internal heat distribution anomaly.</p>



<p>Despite these frigid conditions, Uranus experiences intense weather patterns, including powerful storms and winds that can reach speeds of up to 900 kilometers per hour. These winds blow in the same direction as the planet’s rotation and are some of the fastest in the solar system.</p>



<p>Storms on Uranus are driven by its internal heat and the interaction of its <a href="https://www.earth.com/news/uranus-is-more-gassy-less-icy-than-we-ever-imagined/" target="_blank" rel="noreferrer noopener">atmospheric gases</a>. Observations have shown that these storms can be quite large, sometimes comparable in size to the Earth, and can last for several years.&nbsp;</p>



<p>The planet’s extreme axial tilt also means that the storms and weather patterns are highly variable, depending on the season. During equinoxes, when the Sun is directly over the equator, Uranus exhibits more storm activity compared to when the poles are pointed towards the Sun or away from it.</p>



<h2 class="wp-block-heading" id="h-observations-of-uranus">Observations of Uranus</h2>



<p>“One day on Uranus is about 17 hours, so the planet’s rotation is relatively quick. This makes it supremely difficult for observatories with a sharp eye like Webb to capture one simple image of the entire planet - storms and other atmospheric features, and the planet’s moons, move visibly within minutes,” explained NASA.</p>



<p>“This image combines several longer and shorter exposures of this dynamic system to correct for those slight changes throughout the observing time.”</p>



<p>The first recorded observations of Uranus were made by John Flamsteed on December 13, 1690. However, Flamsteed mistakenly identified the planet as a star, which he named “34 Tauri."&nbsp;</p>



<p>It wasn't until March 13, 1781, that Uranus was officially identified as a planet by William Herschel. He initially thought he had discovered a comet, but further observations and calculations by other astronomers confirmed that it was a new planet, making Uranus the first planet discovered in modern history with the aid of a telescope.</p>



<p>Image Credit: NASA, ESA, CSA, STScI</p>



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The ice giant Uranus in stunning detail

Today's Image of the Day from NASA Webb Images features...

<p>Today's Image of the Day from NASA Earth Observatory features a strong extratropical cyclone, which struck the Pacific Northwest on November 19, 2024.</p>



<p>“The storm knocked over trees and left nearly 600,000 people without power in Washington state on November 20, according to news reports,” noted <a href="https://search.app?link=https%3A%2F%2Fearthobservatory.nasa.gov%2Fimages%2F153605%2Fextratropical-cyclone-whips-over-the-pacific-northwest&amp;utm_campaign=aga&amp;utm_source=agsadl2%2Csh%2Fx%2Fgs%2Fm2%2F4" target="_blank" rel="noreferrer noopener">NASA</a>. “This image shows the storm system at 1:50 p.m. Pacific Time on November 19.” </p>



<p>According to NASA, mature extratropical cyclones like this often feature comma-shaped cloud patterns that are the product of ‘conveyor belt’ circulation. “Heavy precipitation is often present near the low-pressure head of the comma.”</p>



<h2 class="wp-block-heading" id="h-impacts-of-the-extratropical-cyclone-nbsp">Impacts of the extratropical cyclone&nbsp;</h2>



<p>The “bomb cyclone” brought <a href="https://search.app?link=https%3A%2F%2Fwww.earth.com%2Fnews%2Fhow-much-does-climate-change-influence-extreme-weather-events%2F&amp;utm_campaign=aga&amp;utm_source=agsadl2%2Csh%2Fx%2Fgs%2Fm2%2F4" target="_blank" rel="noreferrer noopener">severe weather</a>, including strong winds exceeding 70 mph, heavy rainfall, and snow in higher elevations. These conditions led to significant disruptions, including downed trees and hazardous travel conditions.</p>



<p>In urban and rural areas, damage to infrastructure and properties was substantial, with emergency responders and utility crews working around the clock to restore services.&nbsp;</p>



<p>Additionally, mountain passes faced dangerous blizzard conditions, with up to 20 inches of snow accumulating in some areas, severely affecting travel.</p>



<h2 class="wp-block-heading" id="h-rapid-pace-of-acceleration">Rapid pace of acceleration</h2>



<p>Chris Dolce is a meteorologist at The Weather Channel. He noted that on the evening of November 19, the storm’s central pressure dropped to levels on par with a storm in October 2021, which saw the lowest pressure in about 50 years of records for that region.</p>



<p>“The pace of the storm’s intensification was more than double the criteria for bombogenesis - a popular term that describes a midlatitude cyclone that rapidly intensifies into a ‘bomb cyclone,’” said NASA.</p>



<p>The rapidly dropping atmospheric pressure at the center of the <a href="https://search.app?link=https%3A%2F%2Fwww.earth.com%2Fnews%2Fcoastal-hurricanes-are-intensifying-faster-due-to-climate-change%2F&amp;utm_campaign=aga&amp;utm_source=agsadl2%2Csh%2Fx%2Fgs%2Fm2%2F4" target="_blank" rel="noreferrer noopener">storm</a> caused winds to intensify quickly. According to the National Weather Service in Seattle, wind gusts reached up to 77 miles per hour in the mountains southeast of the city.</p>



<p>“The cyclone kicked off a long-duration atmospheric river that forecasters expect will park over Northern California and southern Oregon through November 22. The National Weather Service estimates that these areas could see rainfall totals of 12 to 16 inches over the duration of the storm,” noted NASA.</p>



<h2 class="wp-block-heading" id="h-what-is-an-extratropical-cyclone">What is an extratropical cyclone?</h2>



<p>An extratropical cyclone is a large-scale weather system that forms outside the tropics, typically between 30° and 60° latitude, and is associated with areas of low pressure.&nbsp;</p>



<h3 class="wp-block-heading" id="h-energy-source">Energy source</h3>



<p>These cyclones obtain their energy from the contrast in temperature between air masses, such as cold polar air and warm subtropical air. This contrast creates instability and drives atmospheric circulation.</p>



<h3 class="wp-block-heading" id="h-development-of-extratropical-cyclones-nbsp">Development of extratropical cyclones&nbsp;</h3>



<p>Extratropical cyclones usually have well-defined warm and cold fronts. They often develop along the polar front, where cold and warm air masses meet.</p>



<p>A common area for their development is the mid-latitudes, particularly in regions like the North Atlantic and North Pacific.</p>



<h3 class="wp-block-heading" id="h-weather-conditions">Weather conditions</h3>



<p>Extratropical cyclones can bring a variety of <a href="https://search.app?link=https%3A%2F%2Fwww.earth.com%2Fnews%2Fhuman-activity-is-rapidly-changing-weather-in-north-america%2F&amp;utm_campaign=aga&amp;utm_source=agsadl2%2Csh%2Fx%2Fgs%2Fm2%2F4" target="_blank" rel="noreferrer noopener">weather conditions</a>, including heavy rain, snow, strong winds, and severe storms. They are responsible for much of the day-to-day weather in mid-latitude regions.</p>



<h3 class="wp-block-heading" id="h-tropical-vs-extratropical-cyclones-nbsp">Tropical vs. extratropical cyclones&nbsp;</h3>



<p>While <a href="https://search.app?link=https%3A%2F%2Fwww.earth.com%2Fnews%2Ffast-moving-tropical-cyclones-are-becoming-more-powerful%2F&amp;utm_campaign=aga&amp;utm_source=agsadl2%2Csh%2Fx%2Fgs%2Fm2%2F4" target="_blank" rel="noreferrer noopener">tropical cyclones</a> derive energy from warm ocean waters and have a warm core, extratropical cyclones gain energy from temperature contrasts and have a cold core.</p>



<p>Tropical cyclones typically lack fronts, whereas extratropical cyclones are defined by them.</p>



<p>These systems are essential in distributing heat and energy across the planet, playing a critical role in the Earth's climate system.</p>



<h2 class="wp-block-heading" id="h-caught-off-guard-by-the-weather">Caught off guard by the weather</h2>



<p>The bomb cyclone in the Pacific Northwest highlights the importance of <a href="https://search.app?link=https%3A%2F%2Fwww.earth.com%2Fnews%2Fnew-era-in-forecasting-ai-will-improve-extreme-weather-warnings%2F&amp;utm_campaign=aga&amp;utm_source=agsadl2%2Csh%2Fx%2Fgs%2Fm2%2F4" target="_blank" rel="noreferrer noopener">preparedness</a>, as residents were urged to secure loose outdoor items, stock emergency supplies, and avoid unnecessary travel.</p>



<p>The fire department in Bellevue, east of Seattle, posted a Severe Weather Safety alert on Facebook: “It’s severe out there. Trees are coming down all over the city, with multiple falling onto homes. If you are able, head to the lowest floor you can and stay away from windows. Do not go outside if you can avoid it.”</p>



<p>The image was captured by the VIIRS (Visible Infrared Imaging Radiometer Suite) on NOAA’s JPSS-1 (Joint Polar Satellite System-1).</p>



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



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Bomb cyclone rapidly intensified in the Pacific Northwest

<p>Today's <strong>Image of the Day</strong> from the European Space Agency features the barred spiral galaxy NGC 1559, located around 35 million light-years away in the little-observed southern constellation Reticulum. The image was captured by the James Webb Space Telescope.&nbsp;</p>



<h2 class="wp-block-heading" id="h-fuel-for-star-formation">Fuel for star formation </h2>



<p>"The data featured in this portrait make use of two of Webb’s instruments: the Mid-InfraRed Instrument (MIRI) and Near-InfraRed Camera (NIRCam)," noted <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">ESA</a>.</p>



<p>"Here MIRI captures the glow of interstellar dust grains, which trace out the interstellar medium, the fuel for future star formation. NIRCam shows the light from stars, even young stars hidden behind prodigious amounts of dust. NIRCam also captures emission from ionised nebulae around young stars."</p>



<h2 class="wp-block-heading" id="h-webb-reveals-galaxies-in-new-light">Webb reveals galaxies in new light</h2>



<p>According to ESA, the data was collected by the <a href="https://sites.google.com/view/phangs/home">PHANGS team</a> as part of a program in which Webb will observe 55 <a href="https://www.earth.com/news/james-webb-captures-galaxies-that-are-too-old-to-exist/">galaxies</a> that have also been mapped by the Atacama Large Millimeter/submillimeter Array (ALMA) radio telescope, the Hubble Space Telescope, and more.&nbsp;</p>



<p>"By combining Webb’s unprecedented view of the dust and stars with data from these other facilities, the team aims to obtain a new, highly detailed view of how stars are born, live, and die in galaxies across the Universe."</p>



<h2 class="wp-block-heading" id="h-ngc-1559-a-loner-in-space">NGC 1559: A loner in space</h2>



<p>Although NGC 1559 appears to sit close to one of our nearest neighbors in the sky - the Large Magellanic Cloud (LMC) - this is just a trick of perspective, noted ESA.</p>



<p>While it is part of the Reticulum constellation, NGC 1559 is not part of the Local Group of galaxies but instead resides in a more distant region of space.</p>



<p>"In reality, NGC 1559 is physically nowhere near the LMC in space; in fact it truly is a loner, lacking the company of any nearby galaxies or membership of any galaxy cluster."</p>



<h2 class="wp-block-heading" id="h-star-formation-in-ngc-1559">Star formation in NGC 1559</h2>



<p>NGC 1559 is notable for its active star formation and strong magnetic fields. It has also been the site of several <a href="https://www.earth.com/news/supernova-explosions-could-damage-distant-planets/" target="_blank" rel="noreferrer noopener">supernovae</a>, making it of particular interest to astronomers studying stellar evolution and the lifecycle of stars.</p>



<p>The structure of NGC 1559 includes well-defined spiral arms that are rich in young, hot stars and regions of ionized gas, indicative of ongoing <a href="https://www.earth.com/news/black-hole-is-starving-its-host-galaxy-of-star-forming-fuel/" target="_blank" rel="noreferrer noopener">star formation</a>.</p>



<p>The galaxy’s central bar is believed to play a role in driving gas towards the core, fueling both the star formation and the activity around its nucleus.</p>



<h2 class="wp-block-heading" id="h-an-extragalactic-wonder">An extragalactic wonder</h2>



<p>Despite being relatively small compared to larger galaxies like the Milky Way, NGC 1559 is an important object for understanding how barred spiral galaxies evolve and the processes that trigger supernovae.</p>



<p>The galaxy’s remote location and active nature make it a fascinating subject of study in the field of extragalactic astronomy. The isolation of NGC 1559 allows for a clearer view of its structure without much interference from neighboring galaxies.</p>



<h2 class="wp-block-heading" id="h-barred-spiral-galaxies">Barred spiral galaxies</h2>



<p>Barred spiral galaxies are a type of spiral galaxy characterized by a central bar-shaped structure composed of stars. This bar extends out from the core and connects to the galaxy's spiral arms, which swirl outward in a graceful pattern.</p>



<p>Scientists believe that the bar plays a crucial role in the evolution of the galaxy, funneling gas towards the core and potentially triggering star formation or feeding a central black hole. </p>



<p>The <a href="https://www.earth.com/news/newly-discovered-stars-milky-way-are-old-as-universe/" target="_blank" rel="noreferrer noopener">Milky Way</a>, our own galaxy, is an example of a barred spiral. These galaxies are quite common in the universe, making up about two-thirds of all observed spiral galaxies.</p>



<p>The bar itself is thought to be a temporary feature, developing as the galaxy matures and possibly disappearing over time as the dynamics of the stars change. </p>



<h2 class="wp-block-heading" id="h-the-reticulum-constellation">The Reticulum constellation</h2>



<p>The Reticulum constellation is a small, faint constellation in the southern sky. Its name means "the reticle" in Latin, which refers to the crosshairs in an eyepiece of a telescope. </p>



<p>The constellation was named in the 18th century by the French astronomer Nicolas Louis de Lacaille to honor the reticle he used in his scientific instruments. It is one of the 88 modern constellations recognized by the International Astronomical Union.</p>



<p>Image Credit: ESA/Webb, NASA &amp; CSA, A. Leroy, J. Lee and the PHANGS Team</p>



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Spiral galaxy NGC 1559 is a loner in outer space

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

<p>Today's <strong>Image of the Day</strong> from the European Space Agency features NGC 1792, a spiral galaxy located in the constellation Columba, about 43 million light-years away from Earth.&nbsp;</p>



<p>This galaxy, discovered by British astronomer James Dunlop in 1826, is part of the larger NGC 1808 group of galaxies.&nbsp;</p>



<h2 class="wp-block-heading" id="h-intimate-view-of-ngc-1792">Intimate view of NGC 1792</h2>



<p>“An orange glow radiates from the center of NGC 1792, the heart of this stellar forge. Captured by the NASA/ESA Hubble Space Telescope, this intimate view of NGC 1792 gives us some insight into this galactic powerhouse,” noted <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">ESA</a>.</p>



<p>“The vast swathes of tell-tale blue seen throughout the galaxy indicate areas that are full of young, hot stars, and it is in the shades of orange, seen nearer the center, that the older, cooler stars reside.”</p>



<h2 class="wp-block-heading" id="h-vigorous-star-formation-nbsp">Vigorous star formation&nbsp;</h2>



<p>NGC 1792 is notable for its vigorous star formation, classifying it as a starburst galaxy. This high rate of star formation is thought to be triggered by gravitational interactions with neighboring galaxies, though the exact cause is still under study.</p>



<p>“Nestled in the constellation of Columba (The Dove), NGC 1792 is both a spiral galaxy, and a starburst galaxy,” said ESA. “Within starburst galaxies, stars are forming at comparatively exorbitant rates. The rate of star formation can be more than 10 times faster in a starburst galaxy than in the Milky Way.”</p>



<h2 class="wp-block-heading" id="h-fierce-bursts-of-star-formation">Fierce bursts of star formation</h2>



<p>ESA noted that when galaxies have a large reservoir of gas, like NGC 1792, these short-lived starburst phases can be sparked by galactic events such as mergers and tidal interactions.&nbsp;</p>



<p>“One might think that these starburst galaxies would easily consume all of their gas in a large forming event. However, supernova explosions and intense stellar winds produced in these powerful starbursts can inject energy into the gas and disperse it.”&nbsp;</p>



<p>“This halts the star formation before it can completely deplete the galaxy of all its fuel. Scientists are actively working to understand this complex interplay between the dynamics that drive and quench these fierce bursts of star formation.”</p>



<p>Due to its distance and brightness, NGC 1792 can be observed with medium-sized telescopes under favorable conditions.</p>



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



<p>Galaxy evolution refers to the process by which galaxies form and change over time. It begins in the early universe, shortly after the <a href="https://www.earth.com/news/new-observations-disprove-big-bang-theory-universe-began-tired-light-theory/" target="_blank" rel="noreferrer noopener">Big Bang</a>, when small density fluctuations in the primordial gas led to the collapse of matter into the first galaxies. </p>



<h3 class="wp-block-heading" id="h-galaxy-mergers">Galaxy mergers</h3>



<p>These early galaxies were small and irregular, composed mostly of gas and dark matter. Over billions of years, galaxies grew larger by merging with one another and by accreting gas from the surrounding space.&nbsp;</p>



<p>These interactions often triggered bursts of star formation, and collisions between galaxies sometimes led to the creation of new, more massive galaxies.</p>



<h3 class="wp-block-heading" id="h-structural-changes">Structural changes</h3>



<p>As galaxies evolve, their morphology - their shape and structure - can change. Early galaxies were often irregular or disk-shaped, but over time, many galaxies formed into the elliptical or spiral shapes we see today.&nbsp;</p>



<h3 class="wp-block-heading" id="h-star-formation">Star formation</h3>



<p>Star formation is a key driver of galaxy evolution, but it gradually slows down as galaxies age. </p>



<p>The gas that fuels <a href="https://www.earth.com/news/black-hole-is-starving-its-host-galaxy-of-star-forming-fuel/" target="_blank" rel="noreferrer noopener">star formation</a> can be used up, or it can be heated and pushed out of galaxies by supernovae or black holes, reducing the galaxy's ability to form new stars.</p>



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



<p>The environment in which a galaxy resides also plays a role in its evolution. Galaxies in dense clusters are more likely to interact with their neighbors, which can alter their shape or trigger bursts of star formation.&nbsp;</p>



<p>In contrast, galaxies in more isolated regions of space evolve more slowly and without as many dramatic interactions.</p>



<h3 class="wp-block-heading" id="h-dark-matter">Dark matter</h3>



<p>Dark matter also plays a crucial role in galaxy evolution. It provides the gravitational framework that holds galaxies together and influences their interactions with one another.&nbsp;</p>



<p>Supermassive <a href="https://www.earth.com/search-results/?search=Galaxies%20merge&amp;start=0" target="_blank" rel="noreferrer noopener">black holes</a>, found at the centers of most large galaxies, can also affect their evolution by releasing energy that impacts star formation and the movement of gas within the galaxy.</p>



<p>Overall, galaxy evolution is a complex and ongoing process driven by interactions between stars, gas, <a href="https://www.earth.com/news/study-dark-matter-does-not-exist-and-the-universe-is-27-billion-years-old/" target="_blank" rel="noreferrer noopener">dark matter</a>, and black holes, and shaped by both internal processes and external influences.</p>



<p>Image Credit<strong>:</strong> ESA/Hubble &amp; NASA, J. Lee</p>



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NGC 1792: A galactic powerhouse 

<p>Imagine being a dolphin, the only one of your kind, in an unfamiliar place that is far from home. This is the reality for a solo male bottlenose dolphin who lives in the Baltic Sea. </p>



<p>He was spotted near the Svendborgsund channel -- a location far removed from the typical warm and bustling habitats of dolphins, where pods provide social connection and safety.</p>



<p>His unexpected presence has captured the attention of local residents and marine biologists alike, and sparked a wave of curiosity about the circumstances that led him to venture into such an unusual and challenging environment.</p>



<h2 class="wp-block-heading" id="h-solitary-dolphin-in-the-baltic-sea">Solitary dolphin in the Baltic Sea </h2>



<p>Enter the scientists from the esteemed <a href="https://www.sdu.dk/en" target="_blank" rel="noreferrer noopener">University of Southern Denmark</a>. Intrigued by the solitary dolphin's presence in the Baltic Sea, and the unlikely possibility of his befriending local <a href="https://www.earth.com/news/harbor-porpoises-are-severely-threatened-by-fishing-activities/" target="_blank" rel="noreferrer noopener">harbor porpoises</a>, they set out to investigate.</p>



<p>The locals had affectionately named the dolphin Delle. To better understand Delle's behavior and communication, the team gathered <a href="https://www.earth.com/news/dolphins-must-shout-over-underwater-noise-to-communicate/" target="_blank" rel="noreferrer noopener">underwater sound</a> recordings over a span of three months, from December 2022 to February 2023.</p>



<h2 class="wp-block-heading" id="h-delle-s-unique-sonic-communication">Delle’s unique sonic communication</h2>



<p>When the researchers analyzed the recordings, they made a fascinating discovery about Delle's behavior. </p>



<p>Delle wasn't just swimming in silence, as one might expect from an isolated dolphin. Instead, he was constantly <a href="https://www.earth.com/news/dolphins-use-baby-talk-to-communicate-with-their-young/" target="_blank" rel="noreferrer noopener">communicating</a>, filling the waters with an array of sounds that hinted at his active engagement with his environment.</p>



<p>The underwater microphone captured an astonishing 10,833 distinct sounds or "voicings" over the course of the study, showcasing the complexity of his vocal activity.</p>



<p>His sonic repertoire ranged from high-pitched clicks and melodic whistles, often associated with social interactions and echolocation, to deeper, more intense noises linked with aggressive or territorial <a href="https://www.earth.com/news/dolphins-change-their-behavior-to-adapt-to-coastal-development/" target="_blank" rel="noreferrer noopener">behavior among dolphins</a>. </p>



<p>This range of sounds painted a vivid picture of a dolphin adapting to his unique situation through his natural abilities.</p>



<p>More intriguingly, Delle was found to emulate the sounds typically used in dolphin-to-dolphin communication, suggesting that he could be talking to himself. </p>



<p>He also exhibited the use of low-frequency tonal and percussive noises, which are believed to aid in navigation and locating food.</p>



<h2 class="wp-block-heading" id="h-mystery-of-the-talking-dolphin">Mystery of the 'talking' dolphin</h2>



<p>Interestingly, Delle continued his vocalizations even when there were no people in his proximity, dismissing any theory that he might be trying to communicate with humans.</p>



<p>The researchers believe that some of Delle's vocalizations could be emotional responses analogous to human laughter or amusement when alone.</p>



<p>Alternatively, they suggest that he could be venting his loneliness, using self-dialogue as a form of distraction in his solitary circumstances.</p>



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



<p>The tale of Delle, the lonely dolphin in the Baltic Sea, has left marine biologists both intrigued and mystified. </p>



<p>His unusual behavioral patterns present numerous questions still to be answered, and open pathways for future studies in animal behavior, marine biology, and animal communication.</p>



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



<p>Life in the Baltic Sea poses unique challenges for Delle, given its brackish waters and lack of a resident dolphin population. </p>



<p>Unlike his usual marine habitats, the Baltic’s ecosystem features colder temperatures, reduced salinity, and a diet that may differ from what bottlenose dolphins are accustomed to. </p>



<p>Marine biologists speculate that Delle's ability to adapt to these unfamiliar conditions reflects the remarkable resilience of dolphins. </p>



<p>However, his isolation raises questions about his long-term well-being, especially as bottlenose dolphins are highly <a href="https://www.earth.com/news/male-dolphins-whistle-to-maintain-social-relationships/" target="_blank" rel="noreferrer noopener">social creatures</a> that thrive in pods.</p>



<h2 class="wp-block-heading" id="h-what-delle-teaches-us">What Delle teaches us </h2>



<p>Delle’s story highlights the importance of monitoring marine biodiversity and the impact of environmental changes. </p>



<p>His unexpected presence in the Baltic Sea could be a result of shifting ecosystems, rising water temperatures, or disrupted migration patterns. </p>



<p>Researchers emphasize that such anomalies highlight the need for global conservation efforts to protect marine life. </p>



<p>Delle’s vocalizations also offer a rare opportunity to study how solitary marine mammals cope with isolation, potentially contributing to our understanding of animal behavior in changing environments.</p>



<h2 class="wp-block-heading" id="h-decoding-dolphin-communication">Decoding dolphin communication</h2>



<p>The researchers noted that Delle's varied repertoire, which includes clicks, whistles, and low-frequency tones, may serve multiple purposes ranging from navigation to emotional expression.</p>



<p>By studying his behavior, scientists hope to uncover new dimensions of dolphin cognition, such as how solitary individuals adapt their vocal patterns in the absence of a pod. </p>



<p>Delle’s case could provide valuable insights into the social and emotional needs of dolphins, and could also enhance efforts to protect these intelligent marine mammals in the wild.</p>



<p>The study is published in the journal <em><a href="https://www.tandfonline.com/doi/full/10.1080/09524622.2024.2422092" target="_blank" rel="noreferrer noopener">Bioacoustics</a></em>.</p>



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<p></p>

Lonely dolphin in the Baltic Sea is constantly "talking" to himself

Imagine being a dolphin, the only one of your kind,...

<p>You could easily mistake this polychaete for a set of fake eyelashes shimmering under faint lights, but this creature is indeed real. Its habitat lies at the junction of three tectonic plates in the depths of the Pacific Ocean.</p>



<p>Researchers from the Schmidt Ocean Institute discovered the worm while using their 7,055-pound robotic explorer ROV <em>SuBastian</em>. They sent the underwater robot to search on the ocean floor and this spectacular bristle worm is what turned up in the <a href="https://www.instagram.com/reel/DCUvkLLS831/?utm_source=ig_web_copy_link&amp;igsh=MzRlODBiNWFlZA==" target="_blank" rel="noreferrer noopener">video footage</a>.</p>



<h2 class="wp-block-heading" id="h-meet-the-polychaete-worm">Meet the polychaete worm</h2>



<p>This fascinating creature is better known as a polychaete, which is a type of segmented <a href="https://www.earth.com/news/mystery-mollusk-glowing-sea-slug-found-in-the-deep-sea/" target="_blank" rel="noreferrer noopener">marine worm</a>. There are more than 10,000 different species of polychaetes distributed all over the world.</p>



<p>"To describe this polychaete, one simply must use jazz hands - it is the only way to capture this deep-sea worm's dazzle!" the experts said in an&nbsp;Instagram&nbsp;post.</p>



<h2 class="wp-block-heading" id="h-internet-reacts-to-the-sparkling-worm">Internet reacts to the sparkling worm</h2>



<p>This creature’s <a href="https://www.earth.com/news/ocean-life-100-new-sea-creatures-found-in-chile/" target="_blank" rel="noreferrer noopener">discovery</a> soon gained the attention of Instagram viewers. One viewer humorously dubbed it a "forbidden toilet scrubber," while another compared it to a "deep sea Xmas tree." </p>



<p>And yes, there were certainly those who could only see a pair of fake eyelashes crawling tantalizingly across the ocean bed.</p>



<p>The researchers discovered this sparkling addition to the polychaete family while the ROV (remotely operated vehicle) pilots were exploring the Chile Margin.</p>



<p>This intriguing region remains largely unknown, and the international team has been undertaking formidable tasks along the margin.</p>



<h2 class="wp-block-heading" id="h-a-natural-laboratory">A natural laboratory</h2>



<p>The Chile Margin, which extends from the country's west coast and suddenly drops into the Pacific Ocean, is an area of particular interest for scientific exploration. </p>



<p>Its unique tectonic forces and terrestrial influences make this margin an ideal location to investigate chemosynthetic and deep-sea environments and, of course, to discover creatures like this shimmering deep-sea worm.</p>



<h2 class="wp-block-heading" id="h-beauty-of-the-sparkling-worm">Beauty of the sparkling worm</h2>



<p>Videos posted to the <a href="https://schmidtocean.org" target="_blank" rel="noreferrer noopener">Schmidt Ocean Institute</a>'s Instagram account show the animal inching along the seabed. </p>



<p>Here, its iridescent bristles catch the light, adding a mesmerising sparkle to its movements. </p>



<p>The term polychaete means "many bristles," and the way these bristles light up is quite unique. In this species, the bristles possess protein structures that cause the iridescence.</p>



<p>It's important to remember that these creatures are more than just appealing to look at. </p>



<p>Polychaetes play a vital role in the global ocean, from the heat-tolerant extremophiles in hydrothermal vents to the bone-eating <em>Osedax </em>worms that undertake nutrient cycling.</p>



<h2 class="wp-block-heading" id="h-exploring-deep-sea-ecosystems">Exploring deep sea ecosystems</h2>



<p>The Chile Margin's unique environment, with an intermediate water depth of about 2,652 to 3,281 feet, presents a fantastic natural laboratory for exploration. </p>



<p>Over a period of 55 days, the researchers aim to map, sample, and characterize the deep-sea ecosystems along the central-south Chile Margin. Will they find more aquatic wonders? Only time will tell.</p>



<p>The expedition's journey along the Chile Margin is a remarkable endeavor that examines the unique phenomenon of chemosynthesis.</p>



<p>Unlike photosynthetic processes driven by sunlight, chemosynthetic organisms derive energy from chemical reactions, typically in environments devoid of light. The bristle worms residing in such habitats exhibit a symbiotic relationship with bacteria, which facilitate this energy conversion.</p>



<p>This natural phenomenon supports diverse lifeforms in these dark, alien worlds and gives the polychaetes an opportunity to live in and adapt to the extreme conditions.</p>



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



<p>In addition to exploration, engaging the public in the wonders of deep-sea research is a key aspect of the Schmidt Ocean Institute's mission. </p>



<p>Through their extensive online presence and their videos that showcase their findings, the scientists at the Institute stimulate public interest and awareness about marine biodiversity and the oceanic environment.</p>



<p>Furthermore, the data and samples collected serve as a foundation for future scientific inquiries, collaboration, and education. </p>



<p>Researchers are particularly eager to study the evolutionary adaptations of <a href="https://www.earth.com/news/alarming-climate-impacts-threaten-key-marine-species/" target="_blank" rel="noreferrer noopener">organisms</a> living along such dynamic margins and to uncover more about the unexplored complexities of the ocean's hidden depths.</p>



<h2 class="wp-block-heading" id="h-advancing-our-understanding-of-the-ocean">Advancing our understanding of the ocean</h2>



<p>This expedition isn't just about discovering <a href="https://www.earth.com/news/earths-oceans-seas-lakes-are-losing-their-ability-to-support-most-types-of-fish/" target="_blank" rel="noreferrer noopener">new species</a>; it's about enhancing our understanding of the ocean. </p>



<p>The researchers at the Schmidt Ocean Institute aim to bolster efforts to manage and protect ecosystems within Chile's waters, and to emphasize the critical need for conservation.</p>



<p>After all, without these explorative efforts, we might have missed out on meeting our new sparkling worm. </p>



<p>Image Credit: Schmidt Ocean Institute </p>



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Sparkling worm discovered deep in the Pacific Ocean

You could easily mistake this polychaete for a set of...

<p>Do you recall those childhood days when you eagerly anticipated bedtime stories about Peter Rabbit, Toad or Ratty from The Wind in the Willows? Or the excitement that washed over you every time you opened a children's book teeming with playful, animated animals? </p>



<p>Well, a new study is giving us a fresh perspective on the role of these furry, iconic characters.</p>



<h2 class="wp-block-heading" id="h-children-s-books-animal-characters">Children's books animal characters</h2>



<p>The research has shed light on the <a href="https://www.earth.com/news/toddlers-learn-faster-after-witnessing-impossible-events/" target="_blank" rel="noreferrer noopener">potential influence</a> of non-human characters in children's books.</p>



<p>The researchers aimed to gauge how these animal characters affected children's theory of mind skills - crucial abilities which include deciphering social changes in the environment based on voice tone, word choice, or facial expressions.</p>



<p>They worked with over 100 children aged five to 10, each of whom were tested on their theory of mind skills after hearing stories featuring animal characters, as well as those highlighting human characters.</p>



<h2 class="wp-block-heading" id="h-human-vs-animal-characters-in-books">Human vs. animal characters in books</h2>



<p>The study unveiled an interesting pattern. When exposed to stories centered around human characters, an age-related progression was observed. </p>



<p>Older children were consistently outperforming their younger counterparts, with 3rd grade children surpassing the researchers' expectations in tests featuring human characters.</p>



<p>But the revelations didn't stop there. The tests that involved animal characters threw up another surprise. </p>



<p>The younger participants were able to match the scores achieved by pupils in 3rd grade,  who were two years their senior. That's quite a feat for our young champions.</p>



<h2 class="wp-block-heading" id="h-new-insight-into-children-s-development">New insight into children's development</h2>



<p>These findings, published in the <em>Journal of Experimental Child Psychology</em>, highlight the importance of both human and non-human characters in <a href="https://www.earth.com/news/outdoor-classes-improve-childrens-mental-health/" target="_blank" rel="noreferrer noopener">children's developmental stages</a>.</p>



<p>The research was led by Dr. Gray Atherton and Dr. Liam Cross from the University of Plymouth’s <a href="https://www.plymouth.ac.uk/schools/psychology" target="_blank" rel="noreferrer noopener">School of Psychology</a>.</p>



<p>"Animals play a huge part of children’s stories, whether that is in books and comics or through TV and film. We wanted to test if that is down to more than simply liking the characters, and whether there are actual benefits of children learning through by watching or reading about animals and if this changes over time," said Dr. Atherton.</p>



<p>"Our findings showed that both human and non-human characters are important in helping children interpret the world around them, and that they play differing roles at different stages in their development. Adapting activities and lessons in nurseries and the early school years to take that into account could be hugely effective in helping to support their development."</p>



<h2 class="wp-block-heading" id="h-implications-for-educators-and-parents">Implications for educators and parents</h2>



<p>The insights gained from this study have substantial implications for educators and parents aiming to support children's cognitive and social development.</p>



<p>By incorporating both human and animal characters into books, educators can craft a more balanced learning environment that caters to the diverse needs of children across age groups. </p>



<p>Parents, too, can enrich their children's home learning experiences by selecting a variety of stories that include both human and animal protagonists. </p>



<p>This approach not only makes reading sessions more engaging but also aids in developing empathy and understanding of complex social scenarios.</p>



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



<p>While this study provides valuable insights, it also opens avenues for further exploration. </p>



<p>Future research could go deeper into the types of animal characteristics that are most effective in nurturing children's theory of mind. For instance, exploring whether anthropomorphized animals or more realistic portrayals have differing <a href="https://www.earth.com/news/parents-who-use-humor-have-better-relationships-with-their-children/" target="_blank" rel="noreferrer noopener">impacts</a>. </p>



<p>Similarly, cross-cultural studies could investigate whether the affinity towards animal characters holds true in diverse cultural contexts. These inquiries could refine understanding and application in educational strategies, enhancing the efficacy of storytelling as a developmental tool.</p>



<h2 class="wp-block-heading" id="h-animal-characters-and-autism-treatment">Animal characters and autism treatment</h2>



<p>In previous studies, Dr. Atherton and Dr. Cross examined the factors influencing the educational and social development of individuals with autism and learning difficulties.</p>



<p>The experts launched initiatives proving how board and online games can bolster confidence among people with autism. </p>



<p>Borrowing insights from this research, the scholars now plan to dig deeper to explore if their findings could provide specific benefits to children with such conditions.</p>



<p>Dr. Cross envisions a significant impact of this study on individuals with autism or <a href="https://www.earth.com/news/kids-with-behavioral-issues-have-high-cortisol-levels-in-their-hair/" target="_blank" rel="noreferrer noopener">other conditions</a> affecting their learning. </p>



<h2 class="wp-block-heading" id="h-a-new-way-of-looking-at-animal-characters">A new way of looking at animal characters</h2>



<p>The researchers have observed how tasks involving animal characters can result in autistic individuals performing on par with non-autistic children. </p>



<p>The plan is to replicate this study with autistic children in an effort to unveil more effective ways to support them at a critical stage in their development.</p>



<p>In a nutshell, this study has unraveled an entirely new dimension of how we view animals in children's books. </p>



<p>Those delightful animal characters do more than simply entertain; they help shape our children's minds and understanding of the world around them in their formative years.</p>



<p>The study is published in the <em><a href="https://www.sciencedirect.com/science/article/pii/S002209652400256X?via%3Dihub" target="_blank" rel="noreferrer noopener">Journal of Experimental Child Psychology</a>. </em></p>



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Animal characters boost social and emotional skills in children

Do you recall those childhood days when you eagerly anticipated...

<p></p>
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<p><br />
<span style="font-weight: 400;">The site of the now-extinct Lake Texcoco in Mexico City Today’s </span><b>Video of the Day</b><span style="font-weight: 400;"> comes from the </span><a href="https://www.esa.int/"><span style="font-weight: 400;">European Space Agency’s</span></a> <i><span style="font-weight: 400;">Earth from Space</span></i><span style="font-weight: 400;"> series and features a look at an area of Mexico City that used to be home to the now-extinct Lake Texcoco.</span></p>
<p><span style="font-weight: 400;">These images were captured by the KOMPSAT-2 satellite over eastern <a href="https://www.earth.com/news/severe-earthquake-mexico-city/">Mexico City</a> in an area known as the Valley of Mexico. Over the course of several centuries, the lake was drained and the area is now home to several smaller reservoirs and ponds.</span></p>
<p>The site of the now-extinct Lake Texcoco in Mexico City  as shown above in the video shows the By 1250 BC the identifying signs of the <a title="Tlatilco culture" href="https://en.wikipedia.org/wiki/Tlatilco_culture">Tlatilco culture</a>, including more complex settlements and a stratified social structure, are seen around the lake.</p>
<p>By roughly 800 BC <a title="Cuicuilco" href="https://en.wikipedia.org/wiki/Cuicuilco">Cuicuilco</a> had eclipsed the Tlatilco cultural centers and was the major power in the Valley of Mexico during the next 200 years when its famous conical pyramid was built. Lake Texcoco (Spanish: Lago de Texcoco) was a natural lake within the &#8220;Anahuac&#8221; or Valley of Mexico. Lake Texcoco is best known as where the Aztecs built the city of Tenochtitlan, which was located on an island within the lake.</p>
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<p><i><span style="font-weight: 400;">By </span></i><a href="mailto:rarnold@earth.com"><i><span style="font-weight: 400;">Rory Arnold</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: </span></i><a href="https://www.esa.int/"><i><span style="font-weight: 400;">European Space Agency</span></i></a></p>