Some of the most dramatic climate events in history are the Snowball Earth episodes, which occurred hundreds of millions of years ago. Nearly the entire planet was covered in ice up to a kilometer (0.6 miles) thick during these periods.&nbsp;



The rare Snowball Earth events did not follow regular cycles but lasted for millions to tens of millions of years before being followed by intense <a href="https://www.earth.com/news/ancient-global-warming-event-sheds-light-on-earths-future/" target="_blank" rel="noreferrer noopener">warming</a>. Despite their significance, the details surrounding how these frozen periods ended are still not fully understood.



A new study led by the <a href="https://www.washington.edu/" target="_blank" rel="noreferrer noopener">University of Washington</a> (UW) offers a more complete picture of how the last Snowball Earth episode ended and sheds light on why it was followed by a major expansion of life, including the emergence of Earth's first animals.&nbsp;



<h2 class="wp-block-heading" id="h-changes-in-key-earth-properties">Changes in key Earth properties</h2>



The research, published in the journal <a href="http://dx.doi.org/10.1038/s41467-024-51412-8" target="_blank" rel="noreferrer noopener">Nature Communications</a>, focuses on ancient rocks known as “cap carbonates,” which are believed to have formed as the planet’s ice sheets thawed.&nbsp;



These rocks provide clues about the state of Earth's atmosphere and oceans roughly 640 million years ago - long before ice cores or <a href="https://www.earth.com/news/earths-largest-ever-solar-storm-discovered-through-tree-rings/" target="_blank" rel="noreferrer noopener">tree rings</a> could record such history.



Study lead author Trent Thomas is a doctoral student in earth and space sciences at UW.



“Cap carbonates contain information about key properties of Earth's atmosphere and ocean, such as changing levels of carbon dioxide in the air or the acidity of the ocean,” said Thomas. "Our theory now shows how these properties changed during and after Snowball Earth.”



<h2 class="wp-block-heading" id="h-formation-of-cap-carbonates-nbsp">Formation of cap carbonates&nbsp;</h2>



Cap carbonates are layered limestone or dolomite rocks with distinct chemical properties. Today, they can be found in more than 50 locations worldwide, including places like Death Valley, Namibia, Siberia, Ireland, and Australia.&nbsp;



These formations are believed to have resulted from the melting of the ice sheets that once covered Earth, triggering significant shifts in atmospheric and oceanic chemistry. The unique sediments were then deposited on the ocean floor.



The rocks are called “caps” because they lie atop the glacial deposits left behind after the Snowball Earth <a href="https://www.earth.com/news/most-complete-record-of-snowball-earth-found-in-rock-formation/" target="_blank" rel="noreferrer noopener">events</a>, and they’re classified as “carbonates” because they consist of carbon-containing limestone or dolomite.&nbsp;



<h2 class="wp-block-heading" id="h-animals-appeared-after-the-last-snowball-earth-nbsp">Animals appeared after the last Snowball Earth&nbsp;</h2>



Understanding how these rocks formed helps clarify the carbon cycle during periods of dramatic climate shifts. 



This latest study, which models these environmental changes, also provides clues about the evolution of life on Earth and explains why more complex life-forms emerged following the last Snowball Earth.



“Life on Earth was simple - in the form of microbes, algae, or other tiny aquatic organisms - for over two billion years leading up to Snowball Earth,” said senior author David Catling, a professor of earth and space sciences at UW.&nbsp;



“In fact, the billion years leading up to Snowball Earth are called the ‘boring billion’ because so little happened. Then two Snowball Earth events occurred, and soon after, animals appear in the fossil record.”



<h2 class="wp-block-heading" id="h-chemistry-of-a-snow-covered-earth-nbsp">Chemistry of a snow-covered Earth&nbsp;</h2>



The new research offers a framework to explain how these two events may be connected. The study models the chemistry and geology during three distinct phases of Snowball Earth.&nbsp;



During the peak of the icy period, the thick ice sheets covering the planet reflected sunlight, though some open water allowed limited exchange between the ocean and atmosphere. Meanwhile, the cold seawater continued reacting with the ocean floor.



Over time, carbon dioxide built up in the atmosphere until it trapped enough heat to warm the planet and melt the ice.&nbsp;



Once this occurred, rainfall began again, and freshwater from glacial melt poured into the oceans, creating a layer of meltwater that floated on top of the denser, salty ocean water.&nbsp;



This layering slowed down ocean circulation. Eventually, ocean mixing resumed, allowing the upper ocean, deep ocean, and atmosphere to interact again.



<h2 class="wp-block-heading" id="h-earth-s-recovery-from-the-snowball-period-nbsp">Earth's recovery from the Snowball period&nbsp;</h2>



“We predict important changes in the environment as Earth recovered from the Snowball period, some of which affected the temperature, <a href="https://www.earth.com/news/preparing-for-ocean-acidification-a-silent-killer-of-climate-change/" target="_blank" rel="noreferrer noopener">acidity</a>, and circulation of the ocean. Now that we know these changes, we can more confidently figure out how they affected Earth’s life,” noted Thomas.



The research team plans to continue exploring how pockets of life that may have survived during Snowball Earth’s tumultuous aftermath could have evolved into the more complex <a href="https://www.earth.com/news/how-life-and-environment-co-evolved-over-500-million-years/" target="_blank" rel="noreferrer noopener">life</a> forms that appeared shortly after.



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‘Snowball Earth’ event set the stage for complex life

Some of the most dramatic climate events in history are the Snowball Earth episodes, which occurred hundreds of millions of years ago. Nearly the entire planet was covered in ice up to a kilometer (0.6 miles) thick during these periods.&nbsp; The rare Snowball Earth events did not follow regular cycles but lasted for millions to tens of millions of years before being followed by intense warming. Despite their significance, the details surrounding how these frozen periods ended are still not fully understood. A new study led by...

In Steven Spielberg’s iconic film Indiana Jones and the Kingdom of the Crystal Skull (2008), the lead character – played by Harrison Ford – warns of the dangers of small scorpions, claiming that “when it comes to scorpions, the bigger the better.” Now, a research team led by the <a href="https://www.nuigalway.ie">National University of Ireland, Galway</a> (NUI Galway) has confirmed Indiana Jones’ insights. By analyzing 36 species of scorpion, the scientists found that smaller species with smaller pincers have more potent venom compared to larger species with robust claws.



“When we look at the most potent, and dangerous, scorpion venoms we find they tend to be associated with species such as the deathstalker which are relatively small. In contrast, the biggest species such as rock scorpions have venoms that are likely to only cause slight pain,” said study senior author Kevin Healy, a lecturer of Zoology at NUI Galway. “Outside of entertaining movie trivia there are good evolutionary reason to expect the results and important medical implications for such patterns.”&nbsp;



Dr. Healy and his colleagues argued that, although scorpions use both their venomous sting and their pincers to capture prey and defend themselves, there is an evolutionary trade-off between these weapons. Energy used to make and maintain larger pincers means less energy is available for the scorpion’s chemical arsenal. Thus, larger scorpions that can use their physical size are less reliant on venom, while smaller ones have evolved more potent, deadly venoms.



“Not only did we find that bigger is better - when it comes to people being stung - we also found that bigger pincers are better when it comes to assessing the danger level of a scorpion. While species such as large-clawed scorpion might be small to medium in size, they mainly rely on their large pincers instead of their relatively weak venom,” explained study lead author Alannah Forde, a graduate student in Zoology at NUI Galway.



Since scorpion stings are a global health problem with over one million cases and thousands of deaths each year, identifying the attacking species is vital for treatment.&nbsp;



“As scientists, our job is also to put popular wisdom to the test. Most victims hospitalized with severe symptoms following scorpion stings are children below the age of 15. Identifying the species responsible is essential to administer the correct treatment, and a simple rule such as ‘bigger is better’ is a first small step toward saving lives,” concluded another senior author, Dr Michel Dugon, Head of the <a href="https://www.nuigalway.ie/zoology/research/venom/">Venom System Lab</a> at NUI Galway.&nbsp;



The study is published in the journal <a href="https://www.mdpi.com/2072-6651/14/3/219">Toxins</a>.&nbsp;



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Indiana Jones was right, small scorpions are more deadly

In Steven Spielberg’s iconic film Indiana Jones and the Kingdom...

On Thursday, April 21, 2002, the <a href="https://www.cdc.gov/">Centers for Disease Control and Prevention</a> (CDC) issued a <a href="https://emergency.cdc.gov/han/2022/han00462.asp">nationwide health alert</a> concerning an unusual cluster of serious hepatitis cases with unknown origin in young children in the United States. These U.S. cases were identified soon after the United Kingdom and several European countries such as Spain, Denmark, and the Netherlands have also reported mysterious cases of hepatitis of unknown etiology.



The first known case in the United Kingdom occurred in January in Scotland, followed by over 100 other cases across, most of them in England. These cases presented clinically with severe acute hepatitis, exhibiting increased levels of liver enzymes, jaundice, as well as – in some cases – gastrointestinal symptoms, such as abdominal pain, diarrhoea, and vomiting. Eight children in the U.K. underwent liver transplants, but no deaths have yet been reported. In the U.S. nine cases of hepatitis in children aged 1-6 have been identified in Alabama and two in North Carolina, between October 2021 and February 2022. The experts did not manage to identify any epidemiological link connected these cases.



Hepatitis can be triggered by many factors, including toxic chemicals, autoimmune disorders, or viruses, such as those causing chickenpox or common cold. However, the most common cause of viral hepatitis are the hepatitis A, B, and C viruses. According to health experts though, all these common causes have been ruled out in both the U.S. and the U.K.



Officials are now investigating a possible association between these mysterious cases of pediatric hepatitis and adenoviruses – a family of widespread viruses that cause various infections, most commonly respiratory illnesses. Although such viruses rarely cause hepatitis, all nine children in Alabama were infected with adenoviruses, with five of the nine cases testing positive for a specific type of adenovirus (adenovirus 41) which often causes cases of pediatric acute gastroenteritis. In the U.K. several – but not all - children tested positive for adenovirus too. While some of the U.K. children were also found to be infected with SARS-CoV-2, no such infections were yet detected in the U.S.



“At this time, adenovirus may be the cause for these, but investigators are still learning more, including ruling out other possible causes and identifying other possible contributing factors,” reported the CDC.



According to Amy Edwards, a pediatric infectious disease expert at the <a href="https://www.uhhospitals.org/rainbow">University Hospitals Rainbow Babies &amp; Children’s Hospital</a> in Cleveland, with the lifting of mask mandates and social distancing measures, it is normal for children to be more susceptible to a wide range of infections.



“Now that COVID is down, viral interference has been released and I think we are going to see a lot of old pathogens coming back and maybe some new ones, which worries me too,” confirmed Monica Gandhi, a professor of Medicine at the <a href="https://www.ucsf.edu/">University of California, San Francisco</a>.



CDC urges clinicians who may encounter pediatric patients with hepatitis of unknown origin to consider adenovirus testing and to immediately report such cases to state public health authorities.



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Mysterious cases of hepatitis detected in children

On Thursday, April 21, 2002, the Centers for Disease Control...

A new study led by the <a href="https://www.nist.gov/">National Institute of Standards and Technology</a> (NIST) has found that disposable coffee cups coated with low-density polyethylene (LDPE) can release trillions of plastic nanoparticles when exposed to boiling <a href="https://www.earth.com/news/its-the-timing-of-water-that-matters-to-plants/">water</a>. Although the effect of these particles on living organisms are not yet clear, these findings are quite alarming for many scientists, who worry that repeated exposure to such pollutants could have long-term health effects.



While there are different types of plastic materials, they are all made of polymers – natural or human-made substances consisting of large molecules linked together. Scientists have already found myriad microscopic particles from these plastics in the world’s oceans and many other places, including even the <a href="https://www.earth.com/news/microplastics-found-in-the-human-blood-for-the-first-time/">human blood</a>. These tiny particles are categorized into two groups: microplastics (smaller than five millimeters but visible to the naked eye), and nanoparticles (smaller than one micrometer and invisible to the human eye).



“The main takeaway here is that there are plastic particles wherever we look. There are a lot of them. Trillions per liter. We don’t know if those have bad health effects on people or animals. We just have a high confidence that they’re there,” said study lead author Christopher Zangmeister, a chemist at NIST.



Dr. Zangmeister and his colleagues have analyzed two types of commercial plastic products – single-use hot beverage cups, such as coffee cups coated with LDPE, and food-grade nylon bags, such as baking liners.&nbsp;After exposing the LDPE-lined coffee cups to boiling water for 20 minutes, they sprayed the water out into a fine mist and dried the mist and all that was left within a solution in order to isolate the plastic nanoparticles.&nbsp;



By running a powerful computer program that could count the particles, together with state-of-the art procedures such as scanning electron microscopy and Fourier-transform infrared spectroscopy, the scientists managed not only to count the nanoparticles, but also to measure their size. They found that the average size of the particles was between 30 and 80 nanometers, and that the concentration of nanoparticles released into boiling water by food-grade nylon was seven times higher compared to that released from coffee cups.



“In the last decade scientists have found plastics wherever we looked in the environment. People have looked at snow in Antarctica, the bottom of glacial lakes, and found microplastics bigger than about 100 nanometers, meaning they were likely not small enough to enter a cell and cause physical problems,” said Dr. Zangmeister.&nbsp;“Our study is different because these nanoparticles are really small and a big deal because they could get inside of a cell, possibly disrupting its function.”



These findings could open new avenues of research for scientists working on the problem of plastic pollution and its effects on human and animal health, while also informing the larger public about the risks involved in using various types of plastic materials. “Most of the studies on this topic are written toward educating fellow scientists. This paper will do both: educate scientists and perform public outreach,” concluded Dr. Zangmeister.



The study is published in the journal <a href="https://pubs.acs.org/doi/10.1021/acs.est.1c06768">Environmental Sciences &amp; Technology</a>.&nbsp;



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Disposable coffee cups release trillions of plastic particles

A new study led by the National Institute of Standards...

President Biden will sign an executive order in Seattle today that will ultimately save some of America's largest and oldest trees. The goal is to help mitigate climate change by preserving old-growth forests, which are valuable carbon stores. The order also aims to restore national forests that have been devastated by <a href="https://www.earth.com/news/one-third-of-global-forest-loss-has-been-caused-by-wildfires/">wildfires</a> and drought, including forests in California that recently lost thousands of giant sequoias to fire.&nbsp;



The executive order requires the <a href="https://www.fs.usda.gov/">Forest Service</a>, the Bureau of Land Management, and the National Park Service to take inventory of the country's old-growth forests within a year.&nbsp;



The agencies have been directed to identify threats to older trees and to develop policies to help protect them, along with the establishment of a reforestation goal by 2030. The experts will address some of the biggest challenges of tree planting efforts in the West, such as expanding the capacity for seed collection and seedling production.&nbsp;



According to a report from the <a href="https://www.washingtonpost.com/">Washington Post</a>, the executive order is also aimed at curbing deforestation overseas, promoting economic development in regions with major timber industries and calculating the economic value of other natural resources such as wetlands.



Collin O’Mara is the president and chief executive of the National Wildlife Federation. He said the order may be an incredibly smart fire resilience strategy.



“We know old growth forests are less prone to megafires, especially when they’re managed well,” O’Mara told the Washington Post. “And apart from the benefits for wildlife and water quality and carbon sequestration, this also could be something that mitigates a lot of the fire risk if we do it right.”



A team of 135 scientists, including Former Forest Service Chief Mike Dombeck, called on President Biden to protect mature and old-growth forests as a critical climate solution.



“Older forests provide the most above-ground carbon storage potential on Earth, with mature forests and larger trees driving most accumulation of forest carbon in the critical next few decades. Left vulnerable to logging, though, they cannot fulfill these vital functions,” the scientists wrote on Thursday.



The experts said that protecting mature forests would set an important, highly visible example for other major forest-holding nations to follow as they address climate change threats.



President Biden will speak today in Seattle about his administration’s plans for action on climate change and other environmental threats. The event is scheduled to begin at 1:30 p.m. ET, and the live feed can be accessed <a href="https://youtu.be/Iu7x4j847_8">here</a>.



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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

President Biden moves to strengthen forests, boost wildfire resilience

President Biden will sign an executive order in Seattle today...

The United Nations has declared 2021-2030 to be the Decade of Ocean Science for Sustainable Development, or the "ocean decade." Earth is mostly covered by ocean, so it makes sense that <a href="https://www.earth.com/news/earth-day-resolutions-misconceptions-about-recycling-plastics/">Earth Day</a> would celebrate ocean conservation.&nbsp;



In support of Earth Day and the <a href="https://www.oceandecade.org/">ocean decade</a>, a non profit is working to raise $100,000.00 to remove 100,000 pounds of plastic trash from the ocean. To celebrate the conjunction of both Earth Day and the organization's 10th birthday, <a href="https://oceanblueproject.org/earth-day-activities-all-about-earth-day/">Ocean Blue Project </a>has already gotten corporate partners to pledge $60,000 to the cause. This a grand beginning towards Ocean Blue’s goal of removing a million pounds of plastic trash from oceans by the middle of the Ocean Decade.&nbsp;



Due to partnerships with several businesses and other organizations, Ocean Blue Project has made Earth Day 2022 one of the easiest days to give. If you’re interested in buying something with a percentage of the profit going toward the cause, there are options.



Next Level Burger is donating 10 percent to Ocean Blue for every Good Catch LTO Vegan Burger sold during Earth Month. From April 18th to 24th, EarthHero is contributing to one pound of ocean clean up for every dollar spent. Woolly Made is contributing a portion of wallet sales to Ocean Blue.



If you would rather donate money directly, Earth Day is a good time for that as well. The<a href="https://www.allatonce.org/"> All at Once Initiative</a> is partnering with the Johnson Ohana Foundation. From April 1st, Jack Johnson will be matching all donations to Ocean Blue of up to $2,500.&nbsp;



Other groups and businesses are also getting in on the action. Earth Breeze is leading campus cleanups by promising to remove 5,000 pounds of plastic garbage. They’re promoting this by giving out free samples of their dryer sheets without plastic packaging. HMTX Industries is pledging to remove 500 pounds of plastic garbage as well.&nbsp;



To do your part to support the Ocean Decade, donate money, support a business that is donating, or simply go pick up some plastic trash and recycle it.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;



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By <a href="mailto:zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Organizations are rallying together to support the ocean decade

The United Nations has declared 2021-2030 to be the Decade...

In May 2021, the Biden administration formally released its “30×30” plan in a report called&nbsp;<a href="https://www.doi.gov/sites/doi.gov/files/report-conserving-and-restoring-america-the-beautiful-2021.pdf">“Conserving and Restoring America the Beautiful,</a>” pressing national governments to ensure that at least 30 percent of their land masses remain protected from development by 2030. The even more ambitious “<a href="https://natureneedshalf.org/">Nature Needs Half</a>” initiative advocates stopping the destruction of natural habitats before the ratio falls below 50 percent (which is unfortunately already too late for many countries).



In order to assess how does the United States fare in relation to these goals, a research team led by the <a href="https://www.numbersusa.org/">NumbersUSA Education and Research Foundation</a> has now released an extended <a href="https://sprawlusa.com/wp-content/uploads/2022/03/NatlSprawl.pdf">report</a> examining the powerful counterforce of urban sprawl - the amount of rural land lost to development - in the U.S. The researchers found that, although the rapacious rate of natural habitat destruction of the 1980s and 1990s has slowed considerably during recent decades, around 17,800 square miles of natural and agricultural land were still converted into developed land for residential, industrial, commercial, transportation, and other purposes between 2002 and 2017.



The study revealed that, while 67 percent (11,950 square miles) of rural land loss was related to population growth, the remaining 33 percent (5,850 square miles) was caused by several other factors which increased the average amount of developed land per person, such as the construction of new shopping malls, streets, highways, parking lots, schools, waste treatment facilities, government buildings, or places of employment, education, or worship.&nbsp;



Although in the United States almost all government efforts to combat urban sprawl have focused on strategies seeking to create denser settlements by changing land use practices, the current study argues that such approaches will have limited success in saving rural land from development because they fail to take into account the key major cause of sprawl: population growth (which, according to the study authors, is mainly driven recently by the increasing number of immigrants coming to the United States).&nbsp;



“If the United States intends to address climate change, biodiversity loss, pollution, etc., it must consider how its population affects each issue,” said Joseph Chaimie, the former director of the <a href="https://www.un.org/development/desa/pd/">United Nations Population Division</a>. “Gradually stabilizing America’s population will provide an exemplary model for other countries to emulate. Rather than racing to increase the size of their respective populations in a world with eight billion humans and growing, nations would see America moving away from an unsustainable demographic strategy.”



Whether immigration should be considered or not the main culprit behind population growth remains a hotly debated issues. However, finding ways of stabilizing the American population will indeed be necessary to stop further habitat loss that could endanger a vast number of ecosystems.



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

"Nature needs half" but natural habitats are vanishing

In May 2021, the Biden administration formally released its “30×30”...

Many studies have shown us that walking provides physical and mental benefits. Yet, new research from the <a href="https://le.ac.uk/">University of Leicester</a> sought to determine if pace made a difference in health outcomes. Indeed, the study shows us that there is a link between how fast we walk and our biological <a href="https://www.earth.com/news/life-satisfaction-increases-with-age-thanks-to-oxytocin/">age</a>.&nbsp;



The researchers analyzed 405,981 UK biobank genetic samples and found that people who walked faster had longer telomeres, which are used to determine biological age. This is because cells with shorter telomeres are correlated with frailty and age-related diseases.&nbsp;



The experts used self-reported data, as well as data from wearable activity trackers, to determine the participants' walking speeds.&nbsp;



Based on the results, the researchers estimate that a lifetime of brisk walking could decrease an individual’s biological age by as much as 16 years by midlife.



"This research uses genetic data to provide stronger evidence for a causal link between faster walking pace and longer telomere length," said study lead author Dr. Paddy Dempsey.



"Data from wrist-worn wearable activity tracking devices used to measure habitual physical activity also supported a stronger role of habitual activity intensity (e.g. faster walking) in relation to telomere length.”



The research is vital because it helps inform the general population and health officials on who may be more at risk.



"This suggests measures such as a habitually slower walking speed are a simple way of identifying people at greater risk of chronic disease or unhealthy ageing, and that activity intensity may play an important role in optimising interventions," explained Dr. Dempsey.



Previous research has indicated that those who walk briskly for at least 10 minutes a day live longer, but this study is the first of its kind to reveal a specific marker - telomere length - associated with walking faster. This may ultimately help encourage healthy lifestyle changes.&nbsp;



"For example, in addition to increasing overall walking, those who are able could aim to increase the number of steps completed in a given time (e.g. by walking faster to the bus stop). However, this requires further investigation," concluded Dr. Dempsey.



This study is published in the journal <a href="https://www.nature.com/commsbio/">Communications Biology</a>.



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By <a href="mailto:nire518@gmail.com">Erin Moody </a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Brisk walking may reduce biological age by more than a decade

Many studies have shown us that walking provides physical and...

On April 19, 2022, the multinational technology company <a href="https://www.apple.com/">Apple</a> released its annual <a href="https://www.apple.com/environment/pdf/Apple_Environmental_Progress_Report_2022.pdf">Environmental Progress Report</a>, in which they highlighted the increased use of recycled content across their products. According to this report, nearly 20 percent of all materials used in Apple products in 2021 was recycled, making Apple the world’s most sustainable corporation.



The company also announced its newest technological innovation, Taz, a recycling machine which utilizes new shredder-like technology to separate magnets from audio modules and thus recover more rare earth elements. The use of Taz, together with that of the recycling robot Daisy, has helped Apple make significant progress in the recycling of older materials. In 2021, 59 percent of all the aluminum used in Apple’s products came from recycled sources, with many products featuring up to 100 percent recycled aluminum. Moreover, since 2015, Apple has also reduced plastics from its packaging by 75 percent, making major progresses toward the company’s goal to completely eliminate packaging plastics by 2025.&nbsp;



In 2021, Apple products included 45 percent certified recycled rare earth elements, 30 percent recycled tin, and 13 percent recycled cobalt. Moreover, for the first time in the company’s history, they used recycled gold in the plating of the main logic board and wire in the front and rear cameras of products such as iPhone 13 and iPhone 13 Pro.



Recovering more materials for use in future products will significantly help reduce mining. For instance, from just one metric ton of iPhone components disassembled by Apple’s recycling robots, engineers can recover the amount of gold and copper typically extracted from 2,000 metric tons of mined rocks. Moreover, the company is also committed to extending the lifetime of their products through refurbishment, which will also significantly reduce the need for future mining.



“As people around the world join in celebrating Earth Day, we are making real progress in our work to address the climate crisis and to one day make our products without taking anything from the earth,” said Lisa Jackson, Apple’s vice president of Environment, Policy, and Social Initiatives. “Our rapid pace of innovation is already helping our teams use today’s products to build tomorrow’s, and as our global supply chain transitions to clean power, we are charting a path for other companies to follow.”



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Apple is ramping up its recycling efforts

On April 19, 2022, the multinational technology company Apple released...

On April 22nd, the world celebrates <a href="https://www.earth.com/news/earth-day-2022-new-investments-in-our-planet-urgently-needed/">Earth Day</a>. This is an opportunity to raise awareness of protecting the environment through global actions that have one shared goal: to save our planet.



This year, more than ever before, we have been warned by the world’s climate scientists that time is running out to protect our world from environmental catastrophe. Some of the most dire findings include:



<ul><li>The temperature on Earth will rise by 2.7°C this century, even if we meet our 2030 climate targets, affecting food supplies, ecosystems, and livelihoods.</li><li>Every year, almost two million children under the age of five die from environmental factors like pollution.&nbsp;</li><li>One in three people do not have access to safe drinking water. And things are only getting worse.&nbsp;</li></ul>



The European Union, through its European Green Deal, is fighting climate change with ambitious policies and cooperation with international partners.&nbsp;



This year, the <a href="https://www.eeas.europa.eu/_en">European External Action Service</a> has organized a call to action through a global campaign to raise awareness by creating a virtual heartbeat of our Planet Earth. Every generated beat is merged with the original in order to create the sound of Earth.



To take part in this campaign, follow these simple steps:



<ol><li>Turn any noise into a heartbeat: clap your hands, tap a beat, use your voice…</li><li>Record a video of your sound on your smartphone.</li><li>Share it on Instagram, Twitter or Facebook with the hashtag #BeTheWave.</li><li>And don’t forget to tag @eudiplomacy, @eu_eeas and European External Action Service - EEAS.</li><li>Then listen to the Earth’s heartbeat getting louder and stronger as people around the world share their sounds to stand up for the environment, to keep the Earth alive.</li></ol>



Our Earth is calling.



Only together can we protect the earth, keep its heart beating, and our home alive.&nbsp;



#BeTheWave on Earth Day! Check out <a href="http://www.earthcalling.eu/">www.earthcalling.eu</a> and get inspired by everything that we can achieve together!



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By <a href="mailto:katherinebucko@gmail.com">Katherine Bucko</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

For Earth Day, let's make our planet's heartbeat louder

On April 22nd, the world celebrates Earth Day. This is...

A new computer modeling study led by the <a href="https://scripps.ucsd.edu/">Scripps Institution of Oceanography</a> at the University of California, San Diego has found that <a href="https://www.earth.com/news/earths-atmosphere-is-expanding-due-to-climate-change/">climate change</a> is altering the mechanics of surface ocean circulations, making the currents become thinner and faster. Such changes can have a major impact, affecting the transport of nutrients that marine organisms need, as well as the microorganisms themselves. In addition, swifter currents could also influence the processes by which the oceans remove heat and carbon dioxide from the atmosphere and protect our planet from excessive warming.



“We were surprised to see that surface currents speed up in more than three-fourths of the world’s oceans when we heated the ocean surface,” said study lead author Qihua Peng, a postdoctoral researcher in Physical Oceanography at the Scripps Institution.&nbsp;&nbsp;&nbsp;



Although previous studies have identified wind as the main factor predicting the speed of ocean currents, these new findings reveal that increases in sea surface temperatures also play a crucial role in this process. 



According to Dr. Peng and his colleagues, warming makes the topmost layers of water become lighter. This rise in density difference between the warm surface layers and the colder water beneath limits the swift surface ocean currents to a thinner layer, causing them to speed up in over three-fourths of the world’s oceans. This increased speed of rotating currents (known as gyres) was associated with a slowdown of current circulation underneath.



The dynamics of the Antarctic Circumpolar Current (the largest in the world in terms of volume transport) provide clear evidence for this hypothesis. As shown by a 2021 study published in the journal <a href="https://www.nature.com/articles/s41558-021-01212-5">Nature Climate Change</a>, this current is speeding up. “The accelerating Antarctic Circumpolar Current is exactly what our model predicts as climate warms,” said Shang-Ping Xie, a climate modeler at Scripps and co-author of the present study.



Since these trends are directly correlated with the ever-increasing levels of greenhouse gases in the atmosphere, urgent measures are needed to mitigate emissions in order to protect the various marine ecosystems that are threatened by changes in currents circulation.&nbsp;



The study is published in the journal <a href="https://www.science.org/doi/full/10.1126/sciadv.abj8394">Science Advances</a>.&nbsp;



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Rising surface temperatures are speeding up ocean currents

A new computer modeling study led by the Scripps Institution...

Black,Carrion,Crow,(corvus,Corone),Perched,On,Mossy,Log,And

Crows and ravens are intelligent <a href="https://www.earth.com/news/birds-and-bats-are-eating-midge-flies-that-contain-pesticides/">birds</a> that use tools, solve complex problems and are known for their vocal “caw” sounds.&nbsp;



What is less well appreciated is their diversity and ability to live all over the world in a variety of habitats. They are one of the most widespread groups of birds worldwide. This is because crows and ravens - part of the avian family of Corvids - underwent rapid global expansion, unlike other birds that stayed within single continents.



Their planetary exploration is largely due to their great flying ability, which allows them to access new places more easily.&nbsp;



New research also shows that their big bodies and brains played an important role in surviving in the new climates they occupied.



“When we think about processes of global diversification, it is important to consider not just the ability to reach new places, but also the ability to survive once you get there. Our work suggests that crows and the ravens diversified both quickly and widely because they were particularly good at coping with different habitats,” said Carlos Botero, assistant professor of biology in Arts &amp; Sciences at <a href="https://wustl.edu/">Washington University in St. Louis</a>.



The researchers show that the birds’ ability to rapidly expand and diversify across the planet was driven by a combination of traits. Using specimens housed in museums, the scientists found that these birds have longer wing lengths, bigger body sizes and bigger relative brain sizes compared with other Corvids.



“We hypothesize that these three very convenient combinations of traits are what allowed this group of birds to colonize and diversify across the world,” said study first author Joan Garcia-Porta.



<h2 id="h-three-convenient-traits">Three convenient traits:</h2>



<ol><li>Longer wings gave crows and ravens higher flying capacities, which allowed the birds to travel across the world.&nbsp;</li><li>Big brains suggest that ancestral crows and ravens were behaviorally flexible. They were smarter than other Corvids and able to figure out how to live in a new environment and increase their chances of survival.&nbsp;</li><li>Bigger body size gave crows and ravens a competitive advantage over smaller species, helping them establish in a new place.</li></ol>



“We are excited with these new insights on how these birds were able to do things that even close relatives did not,” said Professor Botero. “It truly seems that their incredible behavioral flexibility may have played a major role in allowing these birds to survive initial periods of maladaptation and hang in there long enough for selection to catch up and produce a range of new species in the process.”



Traveling across the world required crows and ravens to adapt to many different environments and resulted in high rates of evolution and speciation. This is because arriving in a new environment comes with exposure to selective pressures. For example, living in the cold Arctic after moving from a tropical rainforest likely required very different strategies.



“These new environments often favor tweaks to an organism’s phenotype that facilitate survival and overall performance. That process is often known as optimizing selection,” said Professor Botero.



This caused crows and ravens to acquire new beak shapes that did not exist in any other Corvid, increasing beak shape variation in the Corvidae family. The scientists also found that the birds increased body size variation as they colonized new environments.



“Thanks to these amazing birds, we now understand a bit more the processes by which animals rapidly expand across the planet and how this geographic expansion translates to the production of new species with new morphologies.” Concluded Garcia-Porta.



The study is published in the journal <a href="https://www.nature.com/ncomms/">Nature Communications</a>.



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By <a href="mailto:katherinebucko@gmail.com">Katherine Bucko</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Big brains and bodies helped crows expand across the globe

Crows and ravens are intelligent birds that use tools, solve...

A new study from the <a href="https://www.unl.edu/">University of Nebraska-Lincoln</a> has found the U-shaped relationship between diet and size in modern land <a href="https://www.earth.com/news/ancient-mammals-bulked-up-to-deal-with-drastic-changes/">mammals</a> spans at least 66 million years across a range of vertebrate animal groups and ecosystems.



Decades ago, ecologists realized that graphing the diet-size relationship of terrestrial mammals on a plant-to-protein gradient yields a U-shaped curve. For example, the plant-eating herbivores on the far left of the U-curve and meat-eating carnivores on the far right grow larger in size than those of the all-consuming omnivores and the invertebrate-feasting invertivores in the middle.



However, key features of past and present ecosystems are being disrupted by human-caused extinctions of the largest herbivores and carnivores. The study reveals that this comes with unpredictable consequences.



“We’re not sure what’s going to happen, because this hasn’t happened before,” said study co-author Will Gearty. “But because the systems have been in what seems to be a very steady state for a very long time, it’s concerning what might happen when they leave that state.”



The evolutionary history of a species can be told through the influences of diet and size. This is because diet influences energy consumption, which drives growth and development. Size can also limit the food available to a species, “you can be as big as your food will allow you to be,” Gearty said. “At the same time, you’re often as big as you need to be to catch and process your food. So there’s an evolutionary interplay there.”



The plant-based diet of herbivores is relatively poor in nutrition, they often grow large to cover more ground to forage more food. Herbivores often have long, complex digestive tracts to extract maximum nutrients from what they eat. Carnivores, on the other hand, must grow large to take down those herbivores. For omnivores, their selection of food is vast, their high energy demands require a diet of nuts, insects and other small, energy-dense foods. Lastly, invertivores enjoy mostly protein-rich prey, but are in stiff competition with many other invertivores, leading these species to be the smallest of all.



The U-shaped pattern was also found in land mammals, birds and salt water fish in biomes like forests, grasslands, deserts, or the tropical Atlantic Ocean and even the North Pacific.



“Showing that this exists across all these different groups does suggest that it is something fundamental about how vertebrates acquire energy, how they interact with one another, and how they coexist,” said co-author Kate Lyons.



The researchers were also interested in how long the U-curve may have endured. Fossil records from 5,427 mammal species were analyzed. Some dating back as far back as the Early Cretaceous Period of 145 to 100 million years ago. By doing so, the team conducted the most extensive study of the evolution of body, size and diet in mammals over time.



This revealed that the U-curve stretches back at least 66 million years, after the dinosaur extinction. “We suspect that it’s actually existed since the inception of mammals as a group.” said Gearty.



Next, the team wanted to understand the U-shape presence in the future. They found that the median sizes of herbivores and omnivores have decreased 100 times since the emergence of Neanderthals and Homo sapiens over the past few hundred thousand years. The size of carnivores has also dropped by 10 times in that same span. The U-curve that has persisted for 66 millions of years has begun to flatten.&nbsp;



This led to the team projecting a 50 percent chance that large and medium mammals such as the tiger and rhinoceros will go extinct within the next 200 years. These mammals all have one thing in common - their only predators are human.&nbsp;



The predicted extinctions would further exacerbate the disruption of the U-curve - the loss of large herbivores could trigger or accelerate the loss of the large carnivores that prey on them.



“That could perhaps have fundamental repercussions for the environment and ecosystem as a whole.” said Gearty.



“You keep seeing, in ecological literature, people speculating about how ecosystems are less stable now, and less resilient, and more prone to collapse,” said Lyons. “I think this is just another line of evidence suggesting that that may indeed be the case in the future.”



The research is published in the journal <a href="https://www.nature.com/natecolevol/">Nature Ecology &amp; Evolution</a>.



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By <a href="mailto:katherinebucko@gmail.com">Katherine Bucko</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Humans have disrupted 66 million years of ecosystem stability

A new study from the University of Nebraska-Lincoln has found...

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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



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.

Flu viruses are more flexible than expected

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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.acs.org/">American Chemical Society</a> explores the ability of salt to transform the way that foods and beverages taste. Salt is known to cover up undesirable flavors, such as bitterness in coffee or beer, but how exactly does sodium chloride change the taste of other compounds?



One previous study showed that, not only does salt suppress bitterness, but also enhances sweetness and sourness. Another study revealed that bitterness reduction by salt seems to be happening at the tongue receptor level as well as in the brain.&nbsp;



While it is known that salt taste is mediated by the presence of sodium channels in the form of taste buds, experts believe that there is also an unknown receptor responsible for how we taste salt that has not yet been identified.&nbsp;



Video Credit: ACS Reactions



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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.

How does salt makes things taste better?

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Santiago, the capital city of Chile. The city is located in the center of the Santiago Metropolitan Region, which has a population of about eight million people.&nbsp;



'The weather of Santiago resembles the Mediterranean climate with dry and warm summers with temperatures reaching up to 35°C (from October to March) and cool and humid winters that can drop to 0°C (from April to September)."



"The city lies in the centre of the country’s central valley around 80 km from the Pacific Ocean to the west and borders Argentina to the east. A tiny part of Argentina is visible in the top-right corner of the image where the mountain crest of the Andes Mountains acts as a divider between the two countries," says ESA.



Video/ Image Credit: ESA



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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.

Santiago, Chile in South America

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Spiral,Galaxy,,Illustration,Of,Milky,Way

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Astronomers at <a href="https://www.jhu.edu/">Johns Hopkins University</a> have created an interactive map of the universe, including the actual position and real colors of 200,000 galaxies. The map allows the public to access data that was previously only available to scientists.



The map was developed using data collected by the Sloan Digital Sky Survey. For over two decades, a telescope in New Mexico was aimed at slightly different locations to capture the night sky.&nbsp;



"Growing up I was very inspired by astronomy pictures, stars, nebulae and galaxies, and now it's our time to create a new type of picture to inspire people," said map creator Brice Ménard, a professor at Johns Hopkins. "Astrophysicists around the world have been analyzing this data for years, leading to thousands of scientific papers and discoveries. But nobody took the time to create a map that is beautiful, scientifically accurate, and accessible to people who are not scientists. Our goal here is to show everybody what the universe really looks like."



"In this map, we are just a speck at the very bottom, just one pixel. And when I say we, I mean our galaxy, the Milky Way which has billions of stars and planets. We are used to seeing astronomical pictures showing one galaxy here, one galaxy there or perhaps a group of galaxies. But what this map shows is a very, very different scale."



"From this speck at the bottom, we are able to map out galaxies across the entire universe, and that says something about the power of science."



The <a href="https://mapoftheuniverse.net/">interactive map</a> is available online, where it can be downloaded for free.



Video Credit: Johns Hopkins&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.

Interactive map of the universe includes 200,000 galaxies

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Lesotho: Africa's "Kingdom in the Sky" Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features northwest Lesotho in South Africa.



According to ESA, Lesotho is the only nation in the world that lies completely above 1,000 m in elevation. The country is famous for its tall mountains and narrow valleys, and is known as Africa's "Kingdom in the Sky."



Out of a population of around two million people, about 80 percent live in rural areas. More than 75 percent of these people are engaged in <a href="https://www.earth.com/news/climate-change-will-have-a-global-impact-on-agriculture/">agriculture</a>, including rainfed cereal production and animal grazing.&nbsp;



ESA reports that the country’s agricultural system faces a growing number of issues, with climate-related vulnerabilities such as drought, floods and extreme temperatures occurring more frequently. 



Diamonds are amongst the minerals found in the mountains. Indeed, Lesotho can truly be called the Kingdom in the Sky. Beautiful, culturally rich, safe, affordable, and easily accessible from Durban and Johannesburg, mountainous Lesotho is a vastly underrated travel destination. the Kingdom of Lesotho (Sotho: 'Muso oa Lesotho) is an enclaved country in southern Africa. It is just over 30,000 km2 (11,583 sq mi) in size and has a population of around 2 million.



Video Credit: ESA&nbsp;&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> Staff Writer 



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.

Lesotho: Africa's "Kingdom in the Sky"

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Today's Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Dublin, the capital and largest city of Ireland. Beyond its pub culture, Dublin is known as a modern culinary destination and a UNESCO City of Literature.



"Dublin is located near the midpoint of Ireland’s east coast in the province of Leinster. The city, which covers an area of around 115 square kilometers, is bordered by the Dublin Mountains, a low mountain range to the south, and is surrounded by flat farmland to the north and west," says ESA.



"The city straddles the River Liffey, which rises in the Wicklow Mountains and flows around 80 kilometers eastwards through the city of Dublin, in which it is canalised and bordered with quays. It then empties into Dublin Bay, an arm of the Irish Sea."



Dublin has an abundance of green spaces, including one of the largest enclosed public parks in any European capital city. Phoenix Park, which was originally formed as a royal hunting park in the 1660s, includes 707 hectares of green space.



Video Credit: ESA&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.

The city of Dublin on Ireland's east coast

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Today's Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features the province of Zaragoza in northeast Spain. The image was captured by the Copernicus Sentinel-2 mission.



"Together with the provinces of Huesca and Teruel, Zaragoza formed the old kingdom of Aragon. Its capital, also called Zaragoza (not visible in this image) is home to around half of Aragon’s population," says ESA.



"The Ebro River can be seen winding its way through the province from west to east in this image. Between its source in the Cantabrian Mountains in the northwest and its delta on the Mediterranean coast, the Ebro River is fed by more than 200 tributaries as it flows 910 km across much of northern Spain."



Since rainfall is very scarce in this region, irrigation in the Ebro basin is critically important. In the valleys surrounding the Ebro River, many fields are used for growing crops such as corn, wheat, and barley.



Video/ Image Credit: ESA



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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.

The province of Zaragoza in northeast Spain

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Today’s Video of the Day from <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> reveals the evolution of the Columbia Glacier in southeastern Alaska. Columbia is among the fastest shrinking glaciers in the world, and the video documents its rapid retreat over the years.&nbsp;



Columbia Glacier is a large, multi-branched calving glacier that flows out of the Chugach Mountains to the Prince William Sound.&nbsp;



According to USGS, Columbia had a long history of stability prior to 1980, with a length 41 miles, and small, short-lived advances or retreats.



In the years since 1980, however, satellite images have captured Columbia’s alarming retreat. By using false-color images, scientists can distinguish between snow and ice, open water, vegetation, and rocky debris on the glacier’s surface.



The series of false-color images featured in today's video were acquired over the span of 35 years. You can see that by 2021, the glacier’s main branch had retreated about 15 miles from its initial position.



The Columbia Glacier has also lost more than 50 percent of its volume, mostly due to calving. <a href="https://www.earth.com/video/nasa-reveals-3d-visual-of-an-atmospheric-river/">NASA</a> reports that while climate change likely started the retreat, mechanical processes kept the disintegration going.



The NASA images are provided by Jesse Allen, Robert Simmon, Joshua Stevens, and Lauren Dauphin using data from Landsat satellites, from the U.S. Geological Survey, and data from MODIS on NASA’s Terra satellite. The structure of Columbia’s moraine played a large role in the stability of the glacier before 1980. 



Like other tidewater glaciers, the Columbia built up a moraine over time, and the mixture of ice and rock functioned like a dam keeping out the sea. It was supported on one end by the shoreline and by the underwater terminal moraine at the other.



Video Credit: NASA Earth Observatory/&nbsp; NASA’s Scientific Visualization Studio



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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.

The rapid retreat of the Columbia Glacier

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features the Pyrenees Mountains, which form a natural boundary between France and Spain in southwest Europe.



The mountain range is 430 kilometers in length. It stretches from the Mediterranean Sea on the east to the Atlantic Ocean on the west.



At an elevation of 3404 meters, Pico de Aneto is the highest mountain peak in the Pyrenees, and the third-highest peak in Spain. Pico de Aneto is located in the Posets-Maladeta Natural Park, which spans more than 82,000 acres.&nbsp;



"Geological studies have revealed that the Pyrenees Mountains have been around for longer than the Alps, with their sediments first deposited in coastal basins during the Paleozoic and Mesozoic eras," reports ESA.



"The entire mountain range formed due to the upwelling of large sedimentary rocks by the collision of the Iberian and the Eurasian plate around 100 to 150 million years ago, followed by intense erosion from ice and water."



The western Pyrenees receive more precipitation due to moisture blowing in from the Atlantic Ocean. The mountain range contains many lakes, several small glaciers, and some of the highest waterfalls in Europe.



Video &amp; Image Credit: ESA



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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.

The Pyrenees Mountains in southwest Europe

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Earth,Like,Exoplanet,3d,Render

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes two exoplanets that are orbiting a star 218 light-years away. A team of researchers led by the University of Montreal has found evidence that these planets are "water worlds."



The experts used data from NASA’s Hubble and Spitzer Space Telescopes. They discovered that exoplanets Kepler-138 c and Kepler-138 could be composed largely of water.



"We previously thought that planets that were a bit larger than Earth were big balls of metal and rock, like scaled-up versions of Earth, and that's why we called them super-Earths," explained study co-author Björn Benneke.&nbsp;



"However, we have now shown that these two planets, Kepler-138 c and d, are quite different in nature and that a big fraction of their entire volume is likely composed of water. It is the best evidence yet for water worlds, a type of planet that was theorized by astronomers to exist for a long time."



Video Credit: NASA Goddard



Image Credit: NASA, ESA, and Leah Hustak (STScI)



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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.

Two distant planets may be "water worlds"

[sendtonews key="QIoVYJqRBi-2434608-12187" type="single"] Today's Video of the Day from NASA...

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Satellites reveal how Earth's systems are interconnected Today’s Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes Earth’s interconnected systems, and how this network is affected by rising temperatures.&nbsp;



During 2020, average global temperatures matched the hottest year on record. The hurricane season was also record-breaking, with many of the storms intensifying at extraordinary speeds. Hot water in the ocean is fuel for hurricanes. The satellite data shows that it's all one interconnected system showing how Satellites reveal how Earth's systems are interconnected.



According to NASA, dust swept up from Northern Africa plays a major role in the formation of hurricanes, and is also a key source of fertilization in the Amazon rainforest. As a result of<a href="https://www.earth.com/news/seagrass-wasting-disease-is-fueled-by-climate-change/"> climate</a> change, dust plumes are expected to decline, which will have an effect on vegetation far away.&nbsp;



Images from Earth-observing satellites show how the world’s plant life is affected by natural disasters, fires, and deforestation. Satellites also reveal how widespread changes in vegetation impact waterways,&nbsp; the climate, air quality. Satellites communicate by using radio waves to send signals to the antennas on the Earth. "Earth From Space" is a groundbreaking two-hour special that reveals a spectacular new space-based vision of our planet. 



Video Credit: NASA Goddard&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.

Satellites reveal how Earth's systems are interconnected

[sendtonews key="JbW4VsY53O-1632195-12187" type="single"] Satellites reveal how Earth's systems are interconnected...

Today’s Video of the Day from the <a href="https://welcome.miami.edu/">University of Miami</a> Rosenstiel School of Marine and Atmospheric Science explores how changes in water temperatures have affected tiger shark habitats and movements in the North Atlantic Ocean. The study reveals that rising temperatures have caused the sharks to shift toward the poles over the past 40 years.



“Tiger shark annual migrations have expanded poleward, paralleling rising water temperatures,” explained study lead author Neil Hammerschlag. “These results have consequences for tiger shark conservation, since shifts in their movements outside of marine protected areas may leave them more vulnerable to commercial fishing.”



The researchers analyzed nine years of tracking data from satellite-tagged tiger sharks, combined with four decades of conventional tag and recapture data provided by National Oceanic and Atmospheric Administration (NOAA) Cooperative Shark Tagging Program.



The experts found that during the last decade of record heat, for every one-degree Celsius increase in water temperatures, tiger sharks migrated further poleward by over 400 kilometers. They also migrated two weeks earlier than usual to waters off the northeastern coast of the United States.



“Given their role as apex predators, these changes to tiger shark movements may alter predator-prey interactions, leading to ecological imbalances, and more frequent encounters with humans,” concluded Professor Hammerschlag.



Video Credit: University of Miami Rosenstiel School of Marine and Atmospheric Science



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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.

Tiger sharks are shifting poleward as temperatures rise

Today’s Video of the Day from the University of Miami...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> is focused on the melt ponds that emerge during the spring and summer on the Greenland Ice Sheet, which is the largest ice mass in the northern hemisphere.



"Melt ponds are vast pools of open water that form on both sea ice and ice sheets and are visible as turquoise-blue pools of water in this Copernicus Sentinel-2 image," says ESA.



"When snow and ice melts atop glaciers, water flows in channels and streams and collects in depressions on the surface. These melt ponds can speed up the melting of the surrounding ice since they greatly reduce the ice’s ability to reflect sunlight."



"This can create a positive feedback where an increasing number of melt ponds absorb more heat which causes ice cover to melt even faster."



According to ESA, Greenland has been hit with a late-season heatwave that began in early September. This caused the type of melt event that usually occurs in the middle of summer.



"In a recent paper published in Nature Climate Change, scientists found that major sea-level rise from the melting of the Greenland ice cap is now ‘inevitable’ even if the burning of fossil fuels were to halt overnight," says ESA. "Using satellite observations of Greenland ice loss and ice cap from 2000 to 2019, the team found the losses will lead to a minimum rise of 27 cm regardless of climate change."



Video Credit: ESA&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.

Melt ponds on the Greenland Ice Sheet

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes a new map of Mars that is providing insight into the planet’s watery past. The map also reveals where future missions could safely land on Mars.&nbsp;



The map has been created over the last decade using observations of water-rich rocks and mineral deposits. The images were captured by ESA’s Mars Express and NASA’s Mars Reconnaissance Orbiter.



"A big surprise is the prevalence of these minerals, with the map revealing hundreds of thousands of water-affected locations in the oldest parts of the planet," says ESA. "The new data will help answer exciting questions about Mars’ climate history, whether water was globally persistent or confined to short, intense episodes, and whether the conditions were ever suitable for life."



"Specifically, the map shows the locations and abundances of aqueous minerals. These are from rocks that have been chemically altered by the action of water in the past, and have typically been transformed into clays and salts."



According to John Carter of the Institut d’Astrophysique Spatiale (IAS), our collective understanding of Mars has been oversimplified. He explained that planetary scientists have tended to think that only a few types of clay minerals on Mars were created during its wet period, then as the water gradually dried up, salts were produced across the planet.



The new map shows that the composition of Mars is much more complicated than what we thought. For example, while many salts formed after Martian clays, there are some salts that are presumed to be older than some of the clays.&nbsp;



“The evolution from lots of water to no water is not as clear cut as we thought, the water didn’t just stop overnight. We see a huge diversity of geological contexts, so that no one process or simple timeline can explain the evolution of the mineralogy of Mars. That’s the first result of our study. The second is that if you exclude life processes on Earth, Mars exhibits a diversity of mineralogy in geological settings just as Earth does,” said Carter.



Video Credit: ESA



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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.

The history of Mars is much more complex than we thought

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Today's Video of the Day from the <a href="https://www.stowers.org/">Stowers Institute for Medical Research</a> describes how cavefish adapted to a sedentary lifestyle over tens of thousands of years. 



The experts found that the muscle metabolism of cavefish has been genetically reprogrammed over time. As a result, the animals have experienced major changes in their morphology and behavior. Despite these changes, however, the cavefish remain healthy and fit.



The research may provide new clues about the evolutionary consequences of prolonged physical inactivity in humans.&nbsp;



“It’s no surprise that people are moving less and less as technology has advanced,” said Rohner. “With cavefish, we have a unique system where we can study what might happen if people remained couch potatoes over very, very long periods of time.”



Video Credit: Stowers Institute for Medical Research



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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.

Cavefish are healthy despite their sedentary lifestyle

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Today’s Video of the Day from <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> some of the most incredible waves in the world, as seen by Landsat satellites.



"With more than 370,000 miles of coastline on Earth, there are plenty of places where epic waves build up, curl over, and hurtle toward the shore.- much to the thrill of surfers," says NASA. "There are some places where these waves are so magnificent that they can be seen from space."



"With the broad perspective of satellites, we can see how these iconic waves develop into the world’s tallest, longest, fastest, and heaviest."



Video Credit: NASA Earth Observatory&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.

Satellites capture the world's biggest and fastest waves

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes why satellite images and measurements of our planet have become "essential to our survival, offering a new outlook of our world."&nbsp;



Rising sea levels pose one of the biggest societal threats associated with climate change. According to ESA, satellite altimeter missions such as Copernicus Sentinel-6 are essential in monitoring global and regional changes in sea level.



"Unbeknown to many, the island of Crete, Greece, plays an important role in the Copernicus satellite altimetry constellation and on an international stage," reports ESA.



"Satellite altimetry data have to be continuously monitored at the ESA’s Permanent Facility for Altimetry Calibration where different techniques have pioneered the use of transponders to provide the best measurements to validate satellite altimeters in space soon after launch."



Dr. Craig Donlon explains that, by understanding planet Earth through satellite measurements, we are able to find evidence of change.&nbsp;



Video Credit: European Space Agency&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

Satellites have become essential to our survival

[sendtonews key="761m2QQvR1-2035772-12187" type="single"] Today’s Video of the Day from the...