Today&#8217;s Image of the Day comes from the <a href="https://earthobservatory.nasa.gov">NASA Earth Observatory</a> and features an overhead look at Musa Bay, Iran as seen from space.
This image was captured by the Advanced Land Imager on board NASA&#8217;s EO-1 satellite and shows how various rivers throughout southern Iran converge here before emptying into the Persian Gulf. As a result, the area was a very early shipping center and remains one of Iran&#8217;s largest port cities.
Musa Bay, <a href="https://www.earth.com/image/musa-bay-iran-2/">Iran</a> seen from space His reign saw raids against Qocho and Khotan. He developed water conservancy and transportation near Kashgar and founded a school and a library. Ibn ul-Athir reported that during his reign, there were 200,000 Turkic people embraced Islam in 960. Samanid proselytizers Abul Hasan Said b. Hatim and Abuzar Ammar at-Tamimi were instrumental in this regard.
Musa Baytash temporarily lost Kashgar to King of Khotan, Visa Sura (尉迟输罗) when latter attacked Karakhanid state in 971. He won a big victory. In addition to women and children, there were elephants in the spoils, which were sent to Song China as tribute. It&#8217;s unknown when his reign came to an end. 
He left only one son &#8211; Ali Arslan Khan. His daughter Büwi Maryam&#8217;s tomb located in Beshkerem (伯什克热木乡), Kashgar is holy site for Muslims. Musa Baytash Khan was the fifth head of Karakhanid state and second Muslim khan to rule. His name often mentioned as Tonga Illig, Arslan Khan (in Tazkirah Bughra Khan). His brother was the lesser khan with western parts of the country assigned as his appanage.
&#8212;
By <a href="mailto:rarnold@earth.com">Rory Arnold</a>, <a href="https://www.earth.com">Earth.com</a> Editor

Musa Bay, Iran seen from space

Today's Image of the Day 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.



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



"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>.



"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." 



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.



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



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



"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.



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



“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.



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



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;



<h3 class="wp-block-heading" id="h-causes-of-the-haze">Causes of the haze</h3>



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. 



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



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



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. 



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​.



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



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​​. 



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​​.



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. 



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​​.



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



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:



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



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.



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



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.



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



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



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



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.



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



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



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



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.



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



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.



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.



Image Credit: NASA Earth Observatory



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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...

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



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



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



“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.



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;



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.



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



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.



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



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.



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.



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.



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



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;



“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.



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.



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.



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



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;



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.



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;



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.



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



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;



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.



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.



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;



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.



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



“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.



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



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;



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.



Image Credit: NASA, ESA, CSA, STScI



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The ice giant Uranus in stunning detail

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

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



“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.” 



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.”



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



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.



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;



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



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



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.



“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.



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.



“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.



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



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;



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



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.



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



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



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



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



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.



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



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.



Tropical cyclones typically lack fronts, whereas extratropical cyclones are defined by them.



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



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



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.



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.”



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



Image Credit: NASA Earth Observatory



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Bomb cyclone rapidly intensified in the Pacific Northwest

Today's Image of the Day 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;



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



"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>.



"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."



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



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;



"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."



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



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.



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.



"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."



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



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.



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>.



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.



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



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.



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.



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



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.



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. 



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.



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. 



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



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. 



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.



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



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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...

Today's Image of the Day 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;



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



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



“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>.



“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.”



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



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.



“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.”



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



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;



“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;



“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.”



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



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



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. 



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



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;



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



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



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;



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



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



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.



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



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;



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



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



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;



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.



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.



Image Credit: ESA/Hubble &amp; NASA, J. Lee



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NGC 1792: A galactic powerhouse 

Today's Image of the Day from NASA Earth Observatory features the Fedchenko Glacier in the Pamir Mountains of Tajikistan. It is one of the world's longest glaciers outside of the polar regions.&nbsp;



“An astronaut aboard the International Space Station took this photo of glaciers in the high-elevation valleys of the Pamir Mountains of Central Asia. The upper portion of Fedchenko Glacier crosses the center of the scene.”



NASA noted that most of the larger glaciers in the image show a prominent pattern of light- and dark-brown parallel lines.&nbsp;



“The darker ‘streamlines,’ known as medial moraines, give a sense of the direction of flow of the ice down the valleys. These are concentrations of debris that has been eroded by the glacier from the adjacent mountainsides or a rocky outcrop,” said NASA.



<h2 class="wp-block-heading" id="h-fedchenko-a-high-altitude-glacier">Fedchenko: A high-altitude glacier</h2>



Fedchenko Glacier stretches for approximately 48 miles and covers an area of around 270 square miles. This massive glacier is a critical source of <a href="https://www.earth.com/news/satellites-reveal-a-sudden-drop-in-global-freshwater-levels/" target="_blank" rel="noreferrer noopener">freshwater</a>, feeding several rivers and influencing the region's hydrology.



Fedchenko Glacier lies at high altitudes, with its origins in the high peaks of the Pamirs, where snow accumulates heavily. Despite being situated in a relatively arid region, the glacier's significant size and volume are maintained by substantial snowfall.&nbsp;



Named after Alexei Pavlovich Fedchenko, a Russian explorer and naturalist, the glacier was first surveyed in 1928 during Soviet-era expeditions. It plays a crucial role in climate studies, as changes in its length and mass provide insights into the effects of global warming in Central Asia.&nbsp;



The glacier is also part of a spectacular and remote landscape, surrounded by towering <a href="https://www.earth.com/news/early-humans-preferred-the-mountains-and-it-changed-our-evolution/" target="_blank" rel="noreferrer noopener">mountains</a> and rugged terrain, making it a key feature of the Pamirs' natural beauty.&nbsp;



<h2 class="wp-block-heading" id="h-threats-to-glaciers-worldwide">Threats to glaciers worldwide</h2>



Like many glaciers worldwide, Fedchenko faces the threat of retreat due to <a href="https://www.earth.com/news/peru-has-lost-over-half-of-its-glaciers-in-six-decades/" target="_blank" rel="noreferrer noopener">global warming</a>, raising concerns about water availability and ecosystem changes in the region.



Rising global temperatures caused by greenhouse gas emissions are the primary driver of glacier melting. Warmer temperatures not only melt glacier surfaces but also increase the flow of meltwater beneath them, accelerating their disintegration.



<h3 class="wp-block-heading" id="h-human-activities-and-pollution-nbsp">Human activities and pollution&nbsp;</h3>



Deforestation and urbanization exacerbate these effects by reducing reflective snow cover and increasing heat absorption in nearby areas.&nbsp;



Airborne pollutants like soot and black carbon darken glacier surfaces, reducing their ability to reflect sunlight and speeding up the rate of melting. 



Industrial activities and tourism in glacier regions add physical stress and pollution, further degrading these fragile ecosystems.



<h3 class="wp-block-heading" id="h-water-supplies">Water supplies</h3>



The loss of glaciers has far-reaching consequences. It disrupts freshwater supplies for millions of people who depend on glacial runoff for drinking water, agriculture, and hydropower.&nbsp;



<h3 class="wp-block-heading" id="h-rising-sea-levels">Rising sea levels</h3>



<a href="https://www.earth.com/news/melting-glaciers-unleash-invasive-species-into-unexpected-areas/" target="_blank" rel="noreferrer noopener">Melting glaciers</a> contribute to rising sea levels, threatening coastal communities and ecosystems worldwide. Additionally, the loss of glaciers impacts biodiversity, as many species rely on cold, glacial habitats for survival.



<h3 class="wp-block-heading" id="h-protecting-glaciers">Protecting glaciers</h3>



Efforts to mitigate these threats focus on reducing <a href="https://www.earth.com/news/melting-glaciers-are-hidden-sources-of-greenhouse-gases/" target="_blank" rel="noreferrer noopener">greenhouse gas</a> emissions, protecting glacier regions from industrial exploitation, and promoting sustainable tourism practices.&nbsp;



However, without urgent action, the continued decline of glaciers will have profound implications for the planet's climate, water systems, and ecosystems.



<h2 class="wp-block-heading" id="h-the-pamir-mountains-nbsp">The Pamir Mountains&nbsp;</h2>



The Pamir Mountains, often called the "Roof of the World," are a vast and rugged mountain range located in Central Asia.&nbsp;



They span across Tajikistan, Afghanistan, China, and Kyrgyzstan, forming a vital part of the junction where the Himalayas, the Tian Shan, the Karakoram, the Kunlun, and the Hindu Kush converge.&nbsp;



With peaks soaring over 7,000 meters, including Ismoil Somoni Peak, the range is home to some of the highest altitudes on Earth.



The Pamir Mountains have been central to trade and cultural exchange for centuries, serving as a critical segment of the ancient Silk Road.&nbsp;



Today, the mountains are a popular destination for trekkers and explorers drawn by their breathtaking beauty and challenging terrain.



The Pamirs are not only a natural wonder but also a biological treasure trove, supporting unique wildlife that is adapted to extreme altitudes.&nbsp;



Culturally, the mountains are home to diverse communities, each with its unique traditions and ways of life, shaped by the harsh but majestic environment.



Image Credit: NASA Earth Observatory



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Fedchenko Glacier in the Pamir Mountains

Today's Image of the Day from the European Space Agency features the spiral galaxy IC 5332, which is located over 29 million light-years away from Earth.



The galaxy spans approximately 66,000 light-years in diameter. This makes it notably smaller than our <a href="https://www.earth.com/news/large-amount-of-dark-matter-may-be-missing-from-the-milky-way/" target="_blank" rel="noreferrer noopener">Milky Way</a>, which is just over 100,000 light-years in diameter. 



<h2 class="wp-block-heading" id="h-unprecedented-look-at-ic-5332">Unprecedented look at IC 5332</h2>



In a stunning photo release by NASA and ESA in 2022, the spiral galaxy IC 5332 was presented in an unprecedented level of detail. The images were captured by the <a href="https://www.earth.com/news/james-webb-captures-incredible-new-image-of-uranus/" target="_blank" rel="noreferrer noopener">James Webb Space Telescope</a>.



This feat was made possible through the use of the Mid-InfraRed Instrument (MIRI), which captures images in the mid-infrared spectrum.



<h2 class="wp-block-heading" id="h-unique-perspective-from-earth">Unique perspective from Earth</h2>



One of the most striking features of IC 5332, as revealed by these observations, is its almost perfect face-on orientation relative to Earth.&nbsp;



This unique perspective allows astronomers to clearly observe and admire the symmetrical arrangement of its spiral arms.



<h2 class="wp-block-heading" id="h-webb-unveils-ic-5332-in-new-light">Webb unveils IC 5332 in new light</h2>



The clarity of these images represents a significant advancement over previous observations made by the Hubble Space Telescope, which imaged IC 5332 in ultraviolet and visible light.&nbsp;



While Hubble’s images revealed the galaxy’s symmetrical spiral arms, James Webb’s MIRI has unveiled these structures as a complex web of gas that emits infrared light at various temperatures.



<h2 class="wp-block-heading" id="h-the-miri-instrument-on-james-webb-nbsp">The MIRI instrument on James Webb&nbsp;</h2>



Capturing this range of infrared light is no simple task. It requires highly specialized instruments that must be maintained at extremely cold temperatures.&nbsp;



The MIRI instrument on the James Webb Space Telescope is specifically designed for this purpose and performs exceptionally well. Its capabilities allow astronomers to see aspects of <a href="https://www.earth.com/news/james-webb-captures-galaxies-that-are-too-old-to-exist/" target="_blank" rel="noreferrer noopener">galaxies</a> that are otherwise hidden in other wavelengths.



The detailed images provided by MIRI offer more than just a visual spectacle; they provide valuable data about the composition and temperature of the gases that make up the spiral arms of IC 5332. 



This can help scientists understand the processes of star formation within the galaxy and how these processes compare to those in our own <a href="https://www.earth.com/news/stars-at-the-edge-of-our-milky-way-galaxy-travel-more-slowly/" target="_blank" rel="noreferrer noopener">Milky Way</a>.



<h2 class="wp-block-heading" id="h-webb-finds-hidden-features-of-the-universe-nbsp">Webb finds hidden features of the universe&nbsp;</h2>



The images of IC 5332 served as a critical test of the James Webb Space Telescope’s capabilities in observing the universe in infrared light. 



As astronomers continue to explore with Webb’s full suite of instruments, many more hidden features of the universe will be revealed.



The information provided by the <a href="https://www.earth.com/news/webb-telescope-discovers-second-most-distant-galaxy-in-pandoras-cluster/" target="_blank" rel="noreferrer noopener">James Webb Space Telescope</a> not only expands our understanding of the cosmos but also enhances our appreciation for the complex and beautiful structures that exist in our universe.&nbsp;



<h2 class="wp-block-heading" id="h-spiral-galaxies-like-ic-5332">Spiral galaxies like IC 5332</h2>



Spiral galaxies are some of the most visually striking objects in the universe, characterized by their rotating arms that extend from a central nucleus, giving them a distinct spiral appearance.&nbsp;



These galaxies are primarily made up of a flat, rotating disk containing stars, gas, and dust, and a central concentration of stars known as the bulge. These are often surrounded by a much fainter halo of stars, many of which reside in globular clusters.



Spiral galaxies differ from other galaxy types, such as elliptical and irregular galaxies, in their structure and content. 



The spiral arms are sites of ongoing star formation and are brighter than the rest of the disk because of the young, hot stars that are typically found there. The arms appear distinct because of their density waves, which compress the gas and dust, leading to star formation.



The rotation of the spiral arms also contributes to the galaxy's flat shape due to the centrifugal forces acting on the disk. The central bulge can vary in size and often contains older, red stars.&nbsp;



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



Some spiral galaxies have a bar-shaped structure that extends from the central bulge, making them barred spirals. This bar affects the motion of stars and gas within the galaxy and can influence star formation activity.



Spiral galaxies are an important focus of study because they contain a significant amount of visible matter and play a crucial role in understanding the formation and evolution of galaxies.&nbsp;



Their distinct features also make them particularly useful for studying the laws of physics under extreme conditions, such as high densities and velocities.



Image Credit: <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">ESA</a>/Webb, NASA &amp; CSA, J. Lee and the PHANGS-JWST and PHANGS-HST Teams



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Spiral galaxy IC 5332: A complex web of gas and light

Today's Image of the Day from the European Space Agency features the star-forming region NGC 604, which is located 2.73 million light-years away from Earth in the Triangulum Galaxy (M33). The image was captured by the James Webb Space Telescope.



By studying regions like NGC 604, astronomers can gain insights into the complex interactions between stars and the interstellar medium, as well as the conditions that lead to the birth of stars. This, in turn, helps in understanding the evolution of <a href="https://www.earth.com/news/galaxies-like-our-own-milky-way-are-not-unique/" target="_blank" rel="noreferrer noopener">galaxies</a> and the universe as a whole.



<h2 class="wp-block-heading" id="h-massive-stars-of-ngc-604">Massive stars of NGC 604</h2>



"Sheltered among NGC 604’s dusty envelopes of gas are more than 200 of the hottest, most massive kinds of stars, all in the early stages of their lives," said <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">ESA</a>.



"These types of stars are known as B-types and O-types, the latter of which can be more than 100 times the mass of our own Sun. It’s quite rare to find this concentration of them in the nearby universe. In fact, there’s no similar region within our own Milky Way galaxy."



According to ESA, this concentration of massive stars, combined with its relatively close distance, means NGC 604 gives astronomers an opportunity to study these objects at a fascinating time early in their life.



<h2 class="wp-block-heading" id="h-gigantic-region-of-ionized-hydrogen">Gigantic region of ionized hydrogen</h2>



NGC 604 is one of the largest known regions of ionized hydrogen, also known as an H II region. This nebula is significantly larger than the Orion Nebula, which is one of the most well-known H II regions in our own <a href="https://www.earth.com/news/large-amount-of-dark-matter-may-be-missing-from-the-milky-way/" target="_blank" rel="noreferrer noopener">Milky Way galaxy</a>.&nbsp;



NGC 604 spans about 1,500 light-years across, making it one of the largest H II regions in the Local Group of galaxies. This group includes the Milky Way, the Andromeda Galaxy, and about 54 other smaller galaxies. 



<h2 class="wp-block-heading" id="h-ngc-604-starburst-phenomenon">NGC 604 starburst phenomenon </h2>



Within NGC 604, there are hundreds of young, hot, massive <a href="https://www.earth.com/news/stars-at-the-edge-of-our-milky-way-galaxy-travel-more-slowly/" target="_blank" rel="noreferrer noopener">stars</a>. These stars have ionized the surrounding gas, causing it to glow and creating the nebula. The region is a prime example of a starburst phenomenon, where stars form at a much higher rate than in typical galactic conditions.



“The bright orange streaks in this image signify the presence of carbon-based molecules known as polycyclic aromatic hydrocarbons, or PAHs," explained ESA.



"As you travel further from the immediate cavities of dust where the star is forming, the deeper red signifies molecular hydrogen. This cooler gas is a prime environment for star formation. Ionized hydrogen from ultraviolet radiation appears as a white and blue ghostly glow."



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



Star formation is crucial for the evolution of galaxies and the synthesis of heavy elements. In the cores of stars, elements heavier than helium are created.



The elements are spread throughout the <a href="https://www.earth.com/news/ancient-stars-shakti-shiva-shaped-milky-way-galaxy/" target="_blank" rel="noreferrer noopener">galaxy</a> when stars reach the end of their lives and expel their material - either gently through winds or violently via supernova explosions. This enriching process allows for the formation of new stars and planets, and ultimately, the potential for life.



<h3 class="wp-block-heading">Cloud collapse</h3>



The process begins when part of a molecular cloud becomes unstable and starts to collapse under its own gravity. This can be triggered by events like shock waves from nearby <a href="https://www.earth.com/news/supernova-explosions-could-damage-distant-planets/" target="_blank" rel="noreferrer noopener">supernovae</a>, galactic collisions, or the influence of other massive stars.



<h3 class="wp-block-heading">Formation of a protostar</h3>



As the cloud collapses, it fragments into smaller clumps. Each clump will eventually form one or more stars. 



The material within these clumps continues to fall inward, heating up as it does so, eventually forming a warm core called a protostar. At this stage, the protostar is not yet hot enough for nuclear fusion (the process that powers stars) to occur.



<h3 class="wp-block-heading">Accretion disk</h3>



Around the protostar, material from the surrounding cloud continues to fall inward, forming a rotating disk. This material slowly accretes onto the protostar, increasing its mass.



<h3 class="wp-block-heading">Nuclear fusion begins</h3>



Once the core of the protostar reaches a high enough temperature and pressure, hydrogen atoms begin to fuse into helium, releasing energy in the process. This marks the transition from a protostar to a main sequence star, like our sun.



<h3 class="wp-block-heading">Main sequence and beyond</h3>



The star will spend the majority of its life in the main sequence stage, where it balances the gravitational forces trying to collapse it and the outward pressure from nuclear fusion. 



Eventually, the star will exhaust its hydrogen fuel. Its subsequent evolution will depend on its initial mass, leading to various end stages such as red giants, supernovae, neutron stars, or black holes.



Image Credit: NASA/ESA/CSA James Webb Space Telescope



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Young, massive stars in the Triangulum Galaxy

The MODIS instrument, short for Moderate Resolution Imaging Spectroradiometer, is a key instrument aboard the Terra and Aqua satellites. MODIS is playing a vital role in the development of Earth ecosystem models, able to predict global changes, which then assist policy makers in making informed decisions about the protection of the global environment.

Heavy snow and cloud cover in the Alps are seen in this Image of the day&nbsp;from the <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> and features a look at heavy snow and low clouds in the Alps. Wildlife such as ibex live in the higher peaks to elevations of 3,400 m (11,155 ft), and plants such as Edelweiss grow in rocky areas in lower elevations as well as in higher elevations.

Heavy snow and cloud cover in the Alps

Monitoring Earth Changes with MODIS

Aqua is a NASA scientific research satellite that studies precipitation, evaporation, and water cycles. Terra and Aura make up the Earth Observing System. It's the second component of the system.

A frozen Lake Erie in February Today’s Image of the Day comes from the <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> and features a look at a frozen <a href="https://www.earth.com/image/icy-lake-erie/">Lake Erie</a>, which is currently 93.3 percent iced over. A frozen Lake Erie in February
This false-color image was created using data from the Moderate Resolution Imaging Spectroradiometer (MODIS) on board the Aqua satellite to differentiate between snow, ice, and clouds.
Lake Erie /ˈɪəri/ (French: Lac Érié) is the fourth-largest lake (by surface area) of the five Great Lakes in North America, and the eleventh-largest globally if measured in terms of surface area.It is the southernmost, shallowest, and smallest by volume of the Great Lakes and therefore also has the shortest average water residence time. At its deepest point Lake Erie is 210 feet (64 metres) deep. 
Situated on the International Boundary between Canada and the United States, Lake Erie&#8217;s northern shore is the Canadian province of Ontario, specifically the Ontario Peninsula, with the U.S. states of Michigan, Ohio, Pennsylvania, and New York on its western, southern, and eastern shores. These jurisdictions divide the surface area of the lake with water boundaries. 
The lake was named by the Erie people, a Native American people who lived along its southern shore. The tribal name &#8220;erie&#8221; is a shortened form of the Iroquoian word erielhonan, meaning long tail
&#8212;
By <a href="mailto:rarnold@earth.com">Rory Arnold</a>, <a href="https://www.earth.com/staff">Earth.com</a> Staff Writer
Image Credit: <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a>

A frozen Lake Erie in February

Aqua Earth Observing Satellite

This beautiful photo gallery contains 50 incredible images of Earth from Space. These images were taken by astronauts onboard the International Space Station, as well as by a multitude of NASA satellites orbiting the earth.

Today’s Image of the Day comes thanks to the <a href="https://earthobservatory.nasa.gov/IOTD/view.php?id=90654&amp;eocn=home&amp;eoci=iotd_readmore">NASA Earth Observatory</a> and features a look at Super Typhoon Noru in the Pacific Ocean just south of <a href="https://www.earth.com/news/first-blue-chrysanthemums-created/">Japan</a>.
This image was captured by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite on July 31, 2017. 
At the time the photo was taken, Typhoon Noru was located just 250 kilometers south of Iwo Jima. Maximum sustained winds hit 150 miles per hour.
The storm briefly became a category 5 on July 30, before being downgraded to a category 4 one day later.
&#8211;
By <a href="mailto:rarnold@earth.com">Rory Arnold</a>, <a href="https://www.earth.com/staff">Earth.com</a> Staff Writer
Source: <a href="https://earthobservatory.nasa.gov/IOTD/view.php?id=90654&amp;eocn=home&amp;eoci=iotd_readmore">NASA Earth Observatory</a>

Super Typhoon Noru in the Pacific Ocean

Incredible Images of Earth from Space

Photos from the International Space Station are found in this awesome Earth.com image gallery. Flat-earthers won't agree, but these incredible photos of the Earth were taken by astronauts onboard the International Space Station. The International Space Station is a modular space station in low Earth orbit.

Northern Italy from the space station is seen here in this Image of the Day from the <a href="http://www.esa.int/">European Space Agency</a> (ESA). The view includes the top half of the Italian Peninsula, along with <a href="https://www.earth.com/image/wildfires-burn-northern-corsica/">Corsica</a> and Sardinia off the coast. This image was captured by ESA astronaut Paolo Nespoli on his third and final mission to the Space Station.

Northern Italy from the Space Station

Photos from the International Space Station

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. 



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.



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.



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



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.



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.



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



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



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.



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.



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>. 



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



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



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



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



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.



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



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



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



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



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.



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



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



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. 



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



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.



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



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



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



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



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.



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



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.



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. 



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.



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



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

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

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.



Researchers from the Schmidt Ocean Institute discovered the worm while using their 7,055-pound robotic explorer ROV SuBastian. 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>.



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



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.



"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.



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



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." 



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



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



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



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



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. 



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.



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



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. 



Here, its iridescent bristles catch the light, adding a mesmerising sparkle to its movements. 



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.



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



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



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



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. 



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.



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



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.



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.



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



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. 



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.



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



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.



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



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. 



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.



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



Image Credit: Schmidt Ocean Institute 



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Sparkling worm discovered deep in the Pacific Ocean

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

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? 



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



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



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.



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.



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.



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



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



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



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



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.



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



These findings, published in the Journal of Experimental Child Psychology, 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>.



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>.



"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.



"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."



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



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



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. 



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



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



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



While this study provides valuable insights, it also opens avenues for further exploration. 



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>. 



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.



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



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



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



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.



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. 



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



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



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.



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



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.



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



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Animal characters boost social and emotional skills in children

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

Picture yourself at a social event. As the gathering comes to a close, and you step out, a barrage of thoughts flood your mind. Did you talk excessively? Did you unintentionally offend someone with a misplaced comment? Were your companions entertained or burdened by your presence?



This anxiety-inducing pattern of thought might seem frustrating, but it's part of what makes us human - our brain's advanced social cognitive abilities.



In a scientific study led by Northwestern Medicine, researchers have investigated the intricate evolutionary aspects of this phenomenon.



The study suggests that the human brain's evolutionary advances in social cognition could be harnessed for future psychiatric therapies, potentially aiding those who suffer from anxiety or depression.



<h2 class="wp-block-heading" id="h-lizard-brain-and-social-cognitive-abilities">Lizard brain and social cognitive abilities</h2>



We often find ourselves caught up in thoughts, attempting to decipher the emotions and intentions of those around us. 



"What is that person feeling, thinking? Did I say something to upset them?" noted senior author Rodrigo Braga. 



This cognitive ability, however, is a recent addition to our evolutionary timeline. It involves placing oneself in another's shoes and making educated guesses about their thought process, despite not having any concrete evidence.



The study aimed to decipher the link between the relatively new social <a href="https://www.earth.com/news/where-does-creativity-start-in-the-brain/" target="_blank" rel="noreferrer noopener">cognitive network</a> and the ancient part of the brain called the amygdala, also known as the "lizard brain." The amygdala typically processes fear and detects threats.



Yet, it also governs social behaviors like parenting, mating, aggression, and social dominance hierarchies.



<h2 class="wp-block-heading" id="h-ancient-and-advanced-brain-functions">Ancient and advanced brain functions</h2>



The researchers found that the communication between the amygdala and the social <a href="https://www.earth.com/news/young-adult-depression-linked-to-worse-memory-skills/" target="_blank" rel="noreferrer noopener">cognitive network</a> is ongoing.



In particular, the medial nucleus, a specific part of the amygdala that governs social behaviors, has a connection with the newly evolved social cognitive network areas that are linked to perceiving the emotions and intentions of others.



This link helps shape the social cognitive network's function by granting access to the amygdala's role in processing emotionally significant content.



To uncover these connections, the researchers turned to a noninvasive brain-imaging technique, known as functional magnetic resonance imaging (fMRI), which is used to measure brain activity by detecting variations in blood oxygen levels.



These high-resolution scans came courtesy of Kendrick Kay, a collaborator at the <a href="https://twin-cities.umn.edu" target="_blank" rel="noreferrer noopener">University of Minnesota</a>.



The scans enabled the researchers to observe details of the social cognitive network that are not seen in lower-resolution brain scans.



<h2 class="wp-block-heading" id="h-social-cognition-of-the-brain">Social cognition of the brain</h2>



Understanding the interplay between the amygdala and the social <a href="https://www.earth.com/news/transcendent-thinking-promotes-brain-growth-in-adolescents/" target="_blank" rel="noreferrer noopener">cognitive</a> network offers significant insights into the evolutionary trajectory of the human brain. 



This unique relationship represents a sophisticated adaptation that allows for higher-order social processing, an attribute crucial for the complex social structures that define human societies.



By aligning instinctual responses with advanced cognitive capabilities, this system equips humans with the ability to navigate intricate social landscapes, promoting cooperation, empathy, and theoretical thinking.



Such advancements have likely been pivotal in humanity's survival and success as a species, reflecting an evolutionary advantage to processing social information.



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



Both anxiety and depression involve amygdala hyperactivity, which can lead to excessive emotional responses and impaired emotional regulation. Current treatments, like deep brain stimulation, are invasive because of the amygdala's deep-seated location in the brain.



With the insights this study provides, transcranial magnetic stimulation (TMS), a less intrusive procedure, might be used to target the amygdala indirectly by focusing on the interconnected regions. This could offer a new, more comfortable treatment route for those dealing with these disorders.



Does this mean we are a step closer to alleviating the emotional load carried by millions around us? Only time will tell. But it is studies like these that keep inching us forward in our quest to better understand <a href="https://www.earth.com/news/humans-are-walking-ecosystems-and-microbes-rule-their-evolution/" target="_blank" rel="noreferrer noopener">ourselves</a>, our brains, and our shared humanity.



So next time you leave a social gathering and get swamped by intrusive thoughts about the way others see you, remember that it's just your evolved human brain at work. And who knows, this advanced cognitive trait might offer a lifeline to many who grapple with their emotional well-being.



The study titled “The human social cognitive network contains multiple regions within the amygdala”&nbsp; is published in the journal <a href="https://www.science.org/doi/10.1126/sciadv.adp0453" target="_blank" rel="noreferrer noopener">Science Advances</a>.



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'Lizard brain' shapes social abilities in humans

Picture yourself at a social event. As the gathering comes...

What if switching to a vegan diet could not only save you money but also upgrade your health?



A new study from the Physicians Committee for Responsible Medicine suggests that trading in red meat and dairy products for a greener diet could be kinder to both your wallet and your well-being. 



<h2 class="wp-block-heading" id="h-saving-money-on-a-vegan-diet">Saving money on a vegan diet</h2>



The focus of the study was a humble vegan diet that is low in fat and bursting with fruits, grains, veggies, and beans. This <a href="https://www.earth.com/news/what-you-eat-can-literally-change-the-world/" target="_blank" rel="noreferrer noopener">dietary change</a> could slash your food bill by an impressive 19 percent.



That's a savings of $1.80 each day when compared to the traditional American diet consisting of meat, dairy, and other animal-derived products.



While this amount may not seem like much, if you multiply those savings over a year, they add up to $650.



<h2 class="wp-block-heading" id="h-exploring-the-mediterranean-diet">Exploring the Mediterranean diet </h2>



But what if you find yourself gravitating towards a Mediterranean diet? 



With its emphasis on fruits, vegetables, legumes, fish, low-fat dairy, and extra-virgin olive oil, this heart-friendly diet might cost you a tad more - about 60 cents per day - compared to the Standard American Diet (SAD).



But if stack up the low-fat vegan diet against the Mediterranean diet, the savings rise to a significant $2.40 per day - a whopping 25% drop in food costs.



<h2 class="wp-block-heading" id="h-costs-of-a-vegan-diet">Costs of a vegan diet </h2>



The secret to these savings is simple: swap out the costly meat and dairy for budget-friendly plant-based <a href="https://www.earth.com/news/global-diet-shifts-the-hidden-costs-of-what-we-eat/" target="_blank" rel="noreferrer noopener">alternatives</a>, and you've got yourself a deal.



The study's findings revealed a daily savings of $2.90 on meat, 50 cents on dairy, and an additional 50 cents on added fats with a vegan diet. But it's not all about the money, is it?



Dr. Hana Kahleova is the study's lead researcher and the Director of Clinical Research at the Physicians Committee for Responsible Medicine (<a href="https://www.pcrm.org" target="_blank" rel="noreferrer noopener">PCRM</a>).



"A vegan diet won't just save money; it could save lives by helping to avoid or improve conditions like obesity, type 2 diabetes, and heart disease," said Dr. Kahleova.



Sure, the vegan diet comes with its own additions to the bill - an extra 50 cents a day on vegetables, 30 cents on grains, and a supplementary 50 cents on meat alternatives.



Yet, it seems like even with these additions, the financial and health benefits tip the balance in favor of the vegan lifestyle.



<h2 class="wp-block-heading" id="h-is-going-vegan-worth-it">Is going vegan worth it?</h2>



The study also revealed that a low-fat vegan diet outperformed the Mediterranean diet in areas of weight, body composition, insulin sensitivity, and cholesterol levels.



So, before you turn a blind eye to that tofu or give those beans the cold shoulder, consider this: Could saving money while potentially improving your health be reason enough to give a plant-based <a href="https://www.earth.com/news/world-food-day-fighting-global-hunger/" target="_blank" rel="noreferrer noopener">diet</a> a chance?



With the cost of living on a steady incline, a vegan diet seems like an option that is worth considering.



<h2 class="wp-block-heading" id="h-vegan-diet-and-environmental-consciousness">Vegan diet and environmental consciousness </h2>



While we're pondering personal health and financial benefits, it's only fair that we consider the environmental implications of our dietary choices. Shifting towards a vegan diet doesn’t just favor your finances but also ticks the eco-friendly box.



Animal agriculture contributes to a significant portion of greenhouse gas emissions, land degradation, and deforestation. By shifting towards a greener diet, we have a shot at significantly reducing our carbon footprints.



Producing plant-based foods generally calls for fewer resources like land and water, and results in fewer emissions compared to meat and dairy production. 



This compelling argument weaves together the ecological, personal, and financial advantages of going vegan.



<h2 class="wp-block-heading" id="h-navigating-through-the-green-transition">Navigating through the green transition</h2>



Granted, the benefits of a vegan diet are plentiful. But the transition might come with a few bumps in the road, especially when it comes to snapping out of old habits and ensuring nutritional adequacy.



Thankfully, assistance is abundant. Recipes, meal plans, and nutritional guides could ease the transition, ensuring a wholesome <a href="https://www.earth.com/news/modern-human-diets-pose-many-risks-health-environment/" target="_blank" rel="noreferrer noopener">diet</a>. 



Community support - such as online forums or local vegan groups - can provide needed motivation and answer pressing questions. Introducing plant-based meals gradually into your routine might make the shift feel less formidable and more sustainable.



Setting achievable goals, like starting with one vegan meal a day, could pave the way for lasting changes that benefit both your health and the environment.



The study is published in the journal JAMA Network Open.



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Switching to a vegan diet can cut grocery costs by a very significant amount

What if switching to a vegan diet could not only...

The Red Planet has always been a subject of intrigue and fascination. Recent research led by Curtin University has added more fuel to this age-old curiosity. The scientists discovered what could possibly be the oldest evidence of hot water activity on Mars.



This discovery opens up possibilities that at some point in its mysterious past, Mars may have been a place where life could exist.



<h2 class="wp-block-heading" id="h-hot-water-on-mars">Hot water on Mars</h2>



The study focused on a zircon grain from the renowned <a href="https://www.earth.com/news/hidden-water-found-on-mars-would-cover-the-planet-over-one-mile-deep/" target="_blank" rel="noreferrer noopener">Martian</a> meteorite NWA7034, fondly known as Black Beauty. This tiny grain, although no larger than a grain of sand, holds secrets dating back billions of years.



The analysis of the 4.45 billion-year-old zircon grain revealed geochemical fingerprints of ancient water-rich fluids. These traces of the past suggest that hot water was once present on Mars.



Dr. Aaron Cavosie from Curtin's <a href="https://www.curtin.edu.au/about/learning-teaching/science-engineering/school-of-earth-and-planetary-sciences/" target="_blank" rel="noreferrer noopener">School of Earth and Planetary Sciences</a> noted that this discovery opens new paths for understanding early Martian hydrothermal systems and the planet's past habitability.



"We used nano-scale geochemistry to detect elemental evidence of hot water on Mars 4.45 billion years ago," said Dr. Cavosie.



<h2 class="wp-block-heading" id="h-early-conditions-on-mars">Early conditions on Mars</h2>



Hydrothermal systems are vital for the development of life. They were crucial for life to flourish on Earth. Dr. Cavosie noted that the same essential ingredients for habitable environments were present on <a href="https://www.earth.com/news/meteorite-that-struck-mars-reveals-when-the-planet-had-liquid-water/" target="_blank" rel="noreferrer noopener">Mars</a> during its early crust formation period. 



The team utilized nano-scale imaging and spectroscopy to identify essential elements on the zircon grain, including iron, aluminum, yttrium, and sodium.



The presence and pattern of these elements, added during the zircon's formation billions of years ago, suggest that water was present during early Martian magmatic activity. 



This intriguing discovery indicates that during the initial stages of the Red Planet's existence, conditions were conducive to the existence of water.



<h2 class="wp-block-heading" id="h-resilience-of-mars-crust">Resilience of Mars' crust</h2>



The study also highlighted the resilience of Mars' crust. Despite enduring massive meteorite impacts, causing upheaval of its surface, Mars still had <a href="https://www.earth.com/news/mars-lost-most-of-its-water-but-where-did-it-go/" target="_blank" rel="noreferrer noopener">water</a> during the early Pre-Noachian period, which was before about 4.1 billion years ago.



In 2022, Curtin researchers studied the same zircon grain. They found that it had been "shocked" by a meteorite impact, marking it as the first and only known shocked zircon from Mars.



<h2 class="wp-block-heading" id="h-implications-for-life-on-mars">Implications for life on Mars</h2>



The discovery of ancient hydrothermal activity on Mars significantly changes our understanding of the planet's potential for life. Hydrothermal systems could have created environments rich in chemical energy and nutrients vital for life.



The presence of warm, mineral-laden waters in Mars' crust could have served as a cradle for microbial communities, much like the hydrothermal vents on Earth harbor diverse ecosystems despite the absence of sunlight. 



This implies that if life ever existed on early Mars, hydrothermal systems may have been havens, providing conditions to support some form of life.



The research offers valuable insights into planetary habitability within our solar system and beyond.



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



The revelations from the zircon grain continue to ignite curiosity and lay the groundwork for future Mars exploration missions. 



Planetary scientists are eager to explore other ancient Martian rocks and meteorites that might hold additional clues about Mars' hydrothermal systems and geological history. 



Missions equipped with advanced technology could further investigate the surface and subsurface of Mars, searching for more evidence of past water activity and potential biological markers.



These future efforts could significantly enhance our understanding of the <a href="https://www.earth.com/news/mars-vanishing-water-mystery-new-insights-curiosity-rover/" target="_blank" rel="noreferrer noopener">Red Planet</a> and refine our search for life beyond Earth, spurring innovative technologies and methodologies in planetary science research.



<h2 class="wp-block-heading" id="h-early-mars-and-its-water-activity">Early Mars and its water activity</h2>



This recent study builds on previous research, taking us a step closer to understanding what early Mars was like. 



According to Dr. Cavosie, identifying the signs of water-rich fluids from the zircon's formation period provides geochemical markers of water in the oldest known Martian crust.



The research was conducted by scientists from Curtin’s Space Science and Technology Centre, the John de Laeter Centre, and the <a href="https://www.adelaide.edu.au" target="_blank" rel="noreferrer noopener">University of Adelaide</a>. 



Dr. Jack Gillespie is the lead author of the paper detailing study, which is set to be published in the journal <a href="https://www.science.org/doi/10.1126/sciadv.adq3694" target="_blank" rel="noreferrer noopener">Science Advances.</a>



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Discovery: Ancient Mars had hot water that could have supported life

The Red Planet has always been a subject of intrigue...

Giraffes, the world's tallest animals, are facing a serious crisis. 



From urbanization to poaching, habitat loss and climate change-induced droughts, the long-necked wonders have been encountering challenges that have sent their populations on a rapid downward spiral.



This alarming speed of decline has prompted US wildlife officials to step in, with a proposal targeted at securing the future of many giraffe species.



<h2 class="wp-block-heading" id="h-proposal-for-giraffe-protection">Proposal for giraffe protection</h2>



In a remarkable move, the U.S. Fish and Wildlife Service has suggested classifying various giraffe species under the <a href="https://www.earth.com/news/nasa-is-tracking-endangered-animal-habitats-from-space/" target="_blank" rel="noreferrer noopener">endangered</a> or threatened groups. 



This would mark the first time these African natives enjoy federal protections under the Endangered Species Act.



Being classified as "endangered" signals an immediate risk of <a href="https://www.earth.com/news/earth-may-be-enduring-its-seventh-mass-extinction-not-sixth/" target="_blank" rel="noreferrer noopener">extinction</a>, and represents the highest level of threat under the Act.



On the other hand, a "threatened" tag indicates that the species is on track towards endangerment within a predictable timeframe in the future.



<h2 class="wp-block-heading" id="h-federal-protections-for-giraffes">Federal protections for giraffes</h2>



"Federal protections for giraffes will help protect a vulnerable species, foster <a href="https://www.earth.com/news/scientists-climate-change-and-biodiversity-loss-are-one-indivisible-global-health-crisis/" target="_blank" rel="noreferrer noopener">biodiversity</a>, support ecosystem health, combat wildlife trafficking, and promote sustainable economic practices," explained Martha Williams, the director of <a href="https://www.fws.gov/" target="_blank" rel="noreferrer noopener">US Fish and Wildlife Service</a>. 



"This action supports <a href="https://www.earth.com/news/world-giraffe-day-2024-a-towering-celebration-of-the-gentle-giants/" target="_blank" rel="noreferrer noopener">giraffe conservation</a> while ensuring the United States does not contribute further to their decline." 



<h2 class="wp-block-heading" id="h-endangered-and-threatened-sub-species">Endangered and threatened sub-species</h2>



The officials have proposed to include three subspecies of the Northern giraffe under the endangered category.



This includes the West African, Kordofan, and Nubian subspecies, which have seen a dramatic reduction of about 77% in their populations since 1985. Their numbers have decreased from 25,653 individuals to just 5,919.



Moreover, in East Africa, two subspecies, commonly known as the reticulated and Masai giraffes, are up for consideration to be listed as "threatened."



<h2 class="wp-block-heading" id="h-america-s-role-in-the-giraffe-trade">America's role in the giraffe trade</h2>



America has emerged as a significant market for giraffe parts and products, with 40,000 being imported in a decade, according to a 2018 report.



In addition, American hunters traveling to Africa for <a href="https://www.earth.com/news/does-hunting-fishing-connect-humans-with-nature-or-reinforce-superiority-complex/" target="_blank" rel="noreferrer noopener">hunting</a> and the acquisition of a trophy means that the imported giraffe body parts have also contributed to the crisis.



“These gentle giants are suffering a silent extinction, and Endangered Species Act safeguards will curb US imports of giraffe skins and other body parts,” said Tanya Sanerib, international legal director at the Center for Biological Diversity. 



Recent data, from 2022, “shows everything coming into the US, from giraffe tails and skulls to lots of skins, leather products, bones, bone carvings, of course hunting trophies, giraffe feet, giraffe rugs and giraffe jewelery,” stated Sanerib.



<h2 class="wp-block-heading" id="h-pressures-on-stressed-populations">Pressures on stressed populations </h2>



Meanwhile in Africa, the home of these gentle giants, frequent droughts have been causing havoc, leading to crop failures, livestock losses, and a dire need for food and water.



This has been putting additional pressure on the already stressed populations of giraffes.



Should this proposed rule come into action, it would curb illegal hunting and trade of giraffes by mandating a permit for importing the animal's body parts into the US. 



Fees from the permits will provide funding for research and giraffe conservation efforts.



<h2 class="wp-block-heading" id="h-global-conservation-efforts-for-giraffes">Global conservation efforts for giraffes</h2>



Since 2017, several environmental groups have been urging federal officials to introduce protections for the species. 



The agency will now collect public comments on the proposal until February 19, 2025, and hopes to finalize the action plan within a year, paving the way for better and brighter days for the world's tallest animals.



While the U.S. proposal to classify giraffes under the Endangered Species Act is a milepost, conservation work for these beautiful animals is underway across the globe.



In various parts of Africa, governments and conservation organizations have instigated anti-poaching patrols, community-led habitat restoration initiatives, and educational campaigns in an effort to reduce human-wildlife conflict.



The protection strategy of Giraffe Conservation, for example, works with local communities to monitor giraffe populations and create protected corridors that allow these animals to move freely across fragmented landscapes.



Collaborative international efforts are crucial, as giraffes cross multiple boarders and face varied threats across their vast ranges. 



<h2 class="wp-block-heading" id="h-ecological-role-of-giraffes">Ecological role of giraffes</h2>



Beyond their iconic status as the world’s tallest animals, the giraffe has a major ecological role to play in its ecosystems.



Giraffes function as browsers and thus keep African savannas and woodlands in balance by restricting overgrowth and spreading seeds via their droppings. They are also sometimes prey to top predators.



Their decline could be devastating for other wildlife species and plant life throughout the ecosystems.



The giraffes are a focus of ecotourism, which also represents a source of income for local people. 



Saving giraffes does not only mean saving a single species; rather, it involves conserving the sensitive balance of ecosystems in which they live. 



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Giraffes are suffering a 'silent extinction' and need more protection

Giraffes, the world's tallest animals, are facing a serious crisis....

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



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



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



Video/ Image Credit: ESA



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

Nushagak Bay in southwest Alaska

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



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



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



Video/ Image Credit: American Chemical Society&nbsp;



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



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Flu viruses are more flexible than expected

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

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



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



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



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



Video/Image Credit: ESA&nbsp;



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

Lake Trasimeno in Central Italy

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



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



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



Video Credit: American Chemical Society&nbsp;



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



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

Detecting mercury contamination with the tap of a finger

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



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



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



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



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



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



Video/ Image Credit: European Space Agency&nbsp;



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



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

Kainji Lake in north central Nigeria

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



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



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



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



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



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



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



Video Credit: Amanda Nguyen/University of Illinois



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



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

Designing crops that can beat the heat

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