Community dog parks are often seen as cheerful places where dogs can run free and interact with other pets. Many people feel that these shared spaces help animals stay active, but new <a href="https://parasitesandvectors.biomedcentral.com/articles/10.1186/s13071-024-06563-4" target="_blank" rel="noreferrer noopener">research</a> points to a different story.



Recent <a href="https://parasitesandvectors.biomedcentral.com/articles/10.1186/s13071-024-06563-4" target="_blank" rel="noreferrer noopener">findings</a> from the Department of Ecosystem and Public Health at the University of Calgary have revealed that half of the fecal samples collected in select dog parks contained intestinal parasites. These particular parasites have the potential to affect not only canines but also humans.



<h2 class="wp-block-heading" id="h-parasites-in-dog-parks">Parasites in dog parks</h2>



 The experts found that parasites are often more common in areas where several dogs gather and roam freely. 



Parasites in the dog park samples included protozoa that are known to cause gastrointestinal issues, especially in younger or immune-compromised canines.



These types of parasites are also known to spread from animals to humans through contaminated materials.



Many of them linger in the environment, which increases the risk for anyone handling infected objects or soil.



<h2 class="wp-block-heading" id="h-high-dog-traffic-areas-and-parasites">High dog traffic areas and parasites </h2>



Dogs that visit more than one park or spend significant time off-leash have a greater chance of <a href="https://www.earth.com/news/antibiotic-resistant-superbugs-are-being-passed-from-pets-to-humans/" target="_blank" rel="noreferrer noopener">picking up infections</a>. 



Overlapping areas with high dog traffic can make it easier for parasites to spread, especially if waste is not disposed of properly.



These newly identified parasite infection patterns point to an urgent need for consistent hygiene practices and vigilant parasite prevention measures among dog owners. Missing these steps could lead to larger issues in households and communities.



<h2 class="wp-block-heading" id="h-protecting-dogs-from-parasites">Protecting dogs from parasites</h2>



“Administer year-round broad-spectrum parasite control with efficacy against heartworm, intestinal parasites, fleas, and ticks. Control of parasites with zoonotic potential is essential,” noted the <a href="https://capcvet.org/guidelines/general-guidelines/" target="_blank" rel="noreferrer noopener">Companion Animal Parasite Council </a>(CAPC). 



Such preventive care can also lower veterinary bills over time. Early treatment helps ensure that dogs remain safe from conditions that might otherwise worsen and spread.



“All dogs should have a veterinary examination at least annually. For many dogs, more frequent visits may be appropriate,” stated the <a href="https://www.avma.org/resources-tools/avma-policies/aaha-avma-canine-preventive-healthcare-guidelines" target="_blank" rel="noreferrer noopener">American Veterinary Medical Association</a> (AVMA). 



Consistent check-ups can catch issues early before they turn into bigger problems.



Veterinarians can recommend parasite prevention methods suited to each dog’s lifestyle. They can also help pet owners to address any new concerns about health or behavior.



<h2 class="wp-block-heading" id="h-stopping-the-spread-of-infections">Stopping the spread of infections </h2>



Some of the parasites identified by the experts can affect humans through direct or indirect contact - with children and older family members facing the greater risk. 



Hands-on moments with pets may carry hidden dangers if basic precautions are neglected. 



Habits like washing hands and tidying up after dogs are simple actions that can make a big difference by stopping infections from spreading between households or within neighborhoods.



<h2 class="wp-block-heading" id="h-maintaining-cleanliness-in-play-areas">Maintaining cleanliness in play areas</h2>



Dog parks can still be fun if everyone does their part in disposing of waste and keeping the area clean. It is critical to use designated trash bins and avoid leaving any droppings behind, as parasites thrive in damp conditions.



Regular park maintenance further reduces contamination by preventing harmful organisms from circulating in the soil. A clean environment creates a healthier space for everyone.



<h2 class="wp-block-heading" id="h-tips-for-home-routines">Tips for home routines</h2>



An effective deworming schedule can shield pets from exposure to parasites that might be picked up outdoors. Over-the-counter remedies are not always reliable, so <a href="https://www.earth.com/news/early-neutering-linked-to-serious-health-risks-in-some-dog-breeds/">consulting a veterinarian</a> remains the best bet.



Families that allow pets on couches or beds may want to vacuum more frequently. This is especially true for homes with small children who explore surfaces by touch.



<h2 class="wp-block-heading" id="h-community-awareness-and-responsible-actions">Community awareness and responsible actions</h2>



Dog parks help maintain social bonds among pets and people in the community. Many owners appreciate these places because their pets can socialize and burn off excess energy.



Paying careful attention to <a href="https://www.earth.com/news/warning-dogs-drinking-from-public-water-sources-is-dangerous/">parasite control</a> does not eliminate the social benefit of these shared spaces. Instead, it helps everyone feel secure while enjoying all the perks of playing outdoors.



Active outreach by local pet groups can remind park visitors to be responsible. Handouts, reminders on social media, and polite signs in dog parks can also help to raise awareness.



Any step that guides owners toward better cleaning habits or timely <a href="https://www.earth.com/news/dogs-on-vegan-diets-stay-healthier-and-visit-the-vet-less-often/">veterinary checks</a> is a win for public health. Simple changes can reshape how communities share public spaces like dog parks.



<h2 class="wp-block-heading" id="h-the-path-forward">The path forward</h2>



Informed decisions about parasite control allow <a href="https://www.earth.com/news/are-cat-people-really-more-crazy-than-dog-lovers/">dog lovers</a> to keep enjoying community parks without constant worry. This means routine vet care, proper hygiene, and thorough cleaning habits.



These measures benefit everyone who values recreational spaces that welcome four-legged friends. 



The new findings about <a href="https://www.earth.com/news/dog-killing-liver-fluke-parasite-discovered-us-colorado-river/" target="_blank" rel="noreferrer noopener">intestinal parasites</a> may sound unsettling, but vigilance can make a clear difference. Renewed awareness often spurs owners to take small but vital steps to protect their cherished companions.



-----



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



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



-----

Dog parks may be fueling parasite outbreaks

Community dog parks are often seen as cheerful places where dogs can run free and interact with other pets. Many people feel that these shared spaces help animals stay active, but new research points to a different story. Recent findings from the Department of Ecosystem and Public Health at the University of Calgary have revealed that half of the fecal samples collected in select dog parks contained intestinal parasites. These particular parasites have the potential to affect not only canines but also humans. Parasites in dog parks...

New research highlights the potential for sexual transmission of monkeypox in humans. The 2022 monkeypox outbreak has been linked to sexual contact in patients through direct contact with bodily fluids and skin lesions. Understanding the biology of monkeypox <a href="https://www.earth.com/news/smartphone-app-can-detect-covid-19-infection-in-your-voice/">infection</a> of the testes has substantial public health implications.



Investigators at the <a href="https://mrdc.health.mil/">U.S. Army Medical Research Institute of Infectious Diseases</a> (USAMRIID) analyzed tissue samples from crab-eating macaques, which serve as a primate model for studying the disease and the efficacy of vaccines and treatments against monkeypox.



“We examined tissue samples obtained during both the acute phase of the disease, when infection is at its peak, and the convalescent phase, when infection is gradually subsiding,” explained study senior author Dr. Xiankun (Kevin) Zeng. “We detected monkeypox virus in interstitial cells and seminiferous tubules of the testes, as well as the epididymal lumina, which are the sites of sperm production and maturation.”



The team also found evidence of persistent monkeypox infection in two macaques that survived the virus. While the virus cleared from most organs, it could be detected for up to 37 days post-exposure in the testes.



The USAMRIID team had previously demonstrated that other viruses, including Ebola, can persist in the organs of primates where the immune system is suppressed. Similar to humans, these immune privileged sites include the eyes, brain, and testes.



“Our data provide evidence that monkeypox virus may be shed into semen during both acute and convalescent stages of the disease in crab-eating macaques,” said Dr. Zeng. “It seems plausible, therefore, that human transmission in convalescent male patients might occur via semen.”&nbsp;



Further studies are needed to understand the origins and implications of viral DNA shed in semen, as well as to confirm whether semen from monkeypox patients contains infectious virus.&nbsp;



The researchers noted that the macaque model may not fully reflect monkeypox in humans. This is because the animals demonstrate a more severe disease than in humans.&nbsp; The incubation period in animals is also shorter.&nbsp;



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



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.



---



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

Monkeypox may be sexually transmitted in humans

New research highlights the potential for sexual transmission of monkeypox...

At the beginning of 2021, a team of scientists from the <a href="https://www.noaa.gov/">National Oceanic and Atmospheric Administration</a> (NOAA) has identified a new species of <a href="https://www.earth.com/news/killer-whales-have-close-friendships/">whales</a> in the Gulf of Mexico, which they called Rice’s whale or the Gulf of Mexico whale. This majestic animal can grow up 42 feet in length and weighs 60,000 pounds (roughly the weight of a firetruck). Unfortunately, these whales are at risk of extinction, the entire species currently consisting of just about 50 individuals.



On Thursday, October 13, 2022, more than 100 marine scientists signed an open letter to the Biden administration, pleading for more protective measures for what they called “one of the most endangered marine mammal species” on Earth.



“Some of us have been trying to raise the profile of this whale for many years now,” said Peter Corkeron, a senior scientist and whale researcher at the <a href="https://www.neaq.org/">New England Aquarium</a>. Despite such efforts, many people remain completely unaware of the dangers Rice’s whales currently face. “It is really just the forgotten whale at the moment.”



In their letter, the scientists argued that, as the Biden administration considers additional offshore oil and gas drilling over the next few years, it should pay close attention to the hazards such projects may pose to Rice’s whale. “Continued oil and gas development in the Gulf represents a clear, existential threat to the whale’s survival and recovery,”&nbsp;the scientists warned.



Exposures to seismic air gun blasts accompanying oil and gas exploitation, as well as to oil spills, can severely impact the whales’ health and disrupt “activities vital to feeding and reproduction over large ocean areas.” Moreover, collisions with vessels can also pose significant dangers to these whales since, at night, they usually rest in the upper reaches of the ocean.



“A number of shipping routes traverse the whale’s habitat along the northern Gulf, and the collision risk is likely to increase with new offshore oil and gas development. With abundance so low, the loss of even a single whale threatens the survival of the species,” the researchers warned.



Although these whales were already declared as endangered in 2019 – meaning the government is now forced to monitor their status, designate their “critical habitats,” and develop a clear recovery plan – additional measures are urgently needed to safeguard this threatened marine mammal.



“Do we want the oceans to be places where whales can live and thrive, or not? If we don’t care enough to save them, that speaks volumes about who we all are,” Corckeron concluded.



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.



---



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

New whale species is already threatened with extinction

At the beginning of 2021, a team of scientists from...

Recently, Alaska officials cancelled several <a href="https://www.earth.com/news/scientists-create-sustainable-batteries-from-crab-shells/">crab</a> harvests in an unprecedented conservation effort which sent shock waves through the region’s crabbing industry. After canceling the fall Bristol Bay red king crab harvest, the authorities have now announced - for the first time on record - that they will be holding off the winter harvest of snow crab too.



This major decision comes after massive crab populations declines over the past few years. For instance, data from a recent eastern Bering Sea survey conducted by the <a href="https://www.noaa.gov/">National Oceanic and Atmospheric Administration</a> (NOAA) has shown a 92 percent decline in overall snow crab abundance between 2018 and 2021. Although some small crab entered the population in 2022, lowering this number to 83 percent, the situation continues to be dire, calling for urgent action such as that taken by the Alaska officials.&nbsp;



According to experts, snow crab populations dropped substantially after a 2019 Bering Sea warming, and their numbers continue to decrease due to environmental stressors such as warmer waters and increased threats from predators. “Management of Bering Sea snow crab must now focus on conservation and rebuilding given the condition of the stock,” the <a href="https://www.adfg.alaska.gov/">Alaska Department of Fish and Game</a> (ADF&amp;G) wrote in a recent <a href="https://www.adfg.alaska.gov/static/applications/dcfnewsrelease/1441272349.pdf">statement</a>.&nbsp;



“Efforts to advance our science and understanding of crab population dynamics are underway. With crab industry input, ADF&amp;G will continue to evaluate options for rebuilding, including potential for sustainably fishing during periods of low abundance.”



Since Bering Sea crab harvests grossed $280 million by 2016, and a fleet of about 60 vessels from Alaska, Washington, and Oregon typically pursue the crab during the winter season, the cancelling of this year’s hunt can significantly affect a large number of people who depend on these activities for their subsistence.



“It’s going to be life-changing, if not career-ending, for people. A lot of these guys with families and kids, there’s no option other than getting out. That’s where the hammer is going to fall –&nbsp;on the crew,” warned Dean Gribble Sr., a crab boat captain who has fished for snow crab since the late 1970s.



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.



---



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

Alaska cancels snow crab season due to massive decline

Recently, Alaska officials cancelled several crab harvests in an unprecedented...

Snailfish are found in all of the world’s oceans, at depths varying from shallow intertidal to the deepest oceanic trenches. Of the approximately 400 identified species, 20 are known from the eastern <a href="https://www.earth.com/news/warming-pool-of-water-in-the-pacific-linked-to-human-activities/">Pacific</a>, off the west coast of South America. Although the shallow-living species are relatively well studied, those that inhabit the deepest oceanic habitat, known as the hadal zone, are not well known.



In 2018, an international team of scientists studied the fauna of the Atacama Trench, an expansive underwater subduction zone that runs along the west coast of South America and is as deep as the parallel-running Andes Mountains are high. The deepest regions of this trench, lying between 6,000 and 8,000 meters below sea level, fall in the hadal zone, where conditions are characterized by immense pressures, freezing cold temperatures and pitch darkness. It is no surprise that the fauna inhabiting this trench have not been studied very much.



The team of researchers, including Newcastle University scientists, used specially engineered underwater cameras and lights that were lowered to these depths on custom-made, free-falling landers. Bait, in the form of mackerel, was attached to the landers to attract organisms to the area, and traps enabled the collection of some of these. The two landers were lowered to the depths on 18 different occasions and recorded the presence of numerous small, deep-sea creatures that inhabit this inhospitable zone, including three different types of snailfish.



Previous investigations of deep-sea trenches in many locations have confirmed the importance of snailfish in the hadal zone. They are suction-feeding predators that prey on the many small amphipods (crustaceans) also inhabiting the depths. However, the true diversity and distribution of snailfish species, particularly in the deepest regions of the ocean, remain uncertain due to the scarcity of samples. From the camera footage the researchers identified one type of snailfish that was unfamiliar to them and appeared different from what they expected.&nbsp;



The small blue fish, seen between about 6,000 to 7,600 m in depth, didn’t look like other hadal snailfish. Instead of being pale in color with diminutive eyes, it was blue and had large eyes – unexpected for a creature that lives in total darkness. With these features, it resembled other species of snailfish that are found living in much shallower waters.&nbsp;



The team managed to trap one of these unfamiliar individuals and brought it to the surface. Although it died due to the extreme change in pressure, the researchers were able to use microcomputed tomography (micro-CT) and DNA analysis to compare the new species with other members of the snailfish family. In their description, published in the journal <a href="http://dx.doi.org/10.1007/s12526-022-01294-0">Marine Biodiversity</a>, they name the new species Paraliparis selti, with the specific name meaning ‘blue’ in the Kunza language of the indigenous peoples of the Atacama Desert.



To the team's surprise, the new species appears to be a separate colonizer of the Atacama Trench and marks a new lineage of deep sea snailfish. It is not directly related to the other species known from the area. Species in the genus Paraliparis are particularly abundant in the Southern Ocean of the Antarctic and are rarely found living at depths greater than 2,000 m. This is the first time that a species from this genus has been found inhabiting the hadal zone.&nbsp;



Study lead author, Dr Thom Linley, a visiting researcher at <a href="https://www.ncl.ac.uk/">Newcastle University</a> said: “I find this family of fishes absolutely fascinating. They are not at all what we expect from a deep-sea fish and I love to show people that the world’s deepest fishes are actually pretty cute.”



“For me to get a camera down to where these animals live, it’s made of inches thick stainless steel and sapphire glass. It then films these delicate and beautiful animals perfectly adapted to this extreme environment. With engineering-built force we can only clumsily visit these animals for a short time.”



“We have been wondering for some time just what makes this type of fish so good at living deep. Maybe it was a series of lucky accidents, a chance fluke, that happened in one lineage. Finding this new species tells us that it’s bigger than that. Lightning struck twice and there is something special about this Family.”



“Paraliparis selti provides a fantastic opportunity to explore what allows fish to live so deep. If we only had a single lineage to study, we could never be sure which traits were just part of that lineage and which are the deep-sea secret sauce.”



The researchers conclude that the new species may have evolved from the cold-adapted species of the Southern Ocean, and its discovery and genetic data will help unravel how this group of remarkable fish have evolved, adapted, and diversified into the greater depths of the deep sea. This little blue fish opens new questions about the relationship between cold temperature and high-pressure adaptation and gives a new understanding of how and when life took to the deep.



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.



---



By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Blue snailfish discovered in the darkest ocean depths

Snailfish are found in all of the world’s oceans, at...

A Cambridge team has developed a new way to highlight the demise of nature – and people are listening. Driven by the observation that human activities are silencing nature, Dr. Matthew Agarwala is using sound to convey the enormity of biodiversity loss. The goal is to draw attention to <a href="https://www.earth.com/news/non-native-species-can-have-unexpected-benefits/">species</a> recovery.



“Over the past century we have seen nearly a million species pushed to the brink of extinction – nature is going quiet,” said Agarwala, an economist at the University of Cambridge’s Bennett Institute for Public Policy.&nbsp;



The collaboration with composer Dr. Ewan Campbell is capturing the attention of new audiences. A piece of classical music, Mendelssohn’s ‘Hebrides Overture,' is linked to the loss of an iconic species: the North Atlantic humpback whale.



Inspired by his 1829 trip to a sea cave - Fingal’s Cave - Mendelssohn’s original music captures the vitality of the sea just before the introduction of mechanized industrial fishing.



The 30,000 notes in the original music score is the approximate number of humpback whales in 1829, when the piece was written. Extensive commercial whaling led to a dramatic decline in the whale population.&nbsp;



By 1920, two-thirds of all humpback whales were gone. The resulting piece, ‘Hebrides Redacted,' is a dramatically simple way for audiences to grasp the enormity of biodiversity loss over time.



Researchers have long been sounding the alarm on biodiversity loss, but the message isn’t landing. The project relies on the visceral and emotional response to music that grabs attention in ways that scientific papers do not.



A short film about the music and its impact on audiences has been<a href="https://climatechangefestival.zero.cam.ac.uk/events/world-premier-hebrides-redacted"> released online</a> as part of the Cambridge Zero Climate Change Festival. The audience response was overwhelmingly positive – and the piece received a standing ovation.



“It really was an uninitiated audience at the Wilderness Festival - people were there for a good time, not to be told that the world is falling apart through the medium of music from the 19th century. But somehow it worked,” said Dr. Campbell, Director of Music at Churchill College and Murray Edwards College, Cambridge.



The duo drew attention to policies needed to help humpback whale populations recover. The last part of the piece looks into the future, predicting an optimistic eight percent rise in whale population every decade. “We can see when the oceans are better managed, whale populations can start to rebound,” said Dr. Agarwala.



Marine protected areas could protect food chains, re-route maritime freight to reduce the number of whales struck by ships, and minimize ocean pollution to allow the humpback whale population to fully recover. And so their music does the same.



“But even in the face of devastating destruction, nature is resilient and always beautiful, and so even when two-thirds of the music is absent there’s still a delicate beauty, though a pale imitation of its once dramatic glory,” said Dr. Campbell. In this way, the piece shows how human activities have silenced nature.



Agarwala and Campbell are excited by the power of arts and sciences working together. The duo hopes that future projects will encourage policy-makers to take action.



The <a href="https://climatechangefestival.zero.cam.ac.uk/">Cambridge Zero Climate Change Festival 2022</a> includes a focus on ensuring the conversation around climate change is accessible to the general public. It runs from Friday 14th to Sunday 16th October.



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.



---



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

Classical tune illustrates the loss of humpback whales

A Cambridge team has developed a new way to highlight...

According to a recently released assessment by the <a href="https://www.worldwildlife.org/">World Wildlife Fund</a> (WWF), wild populations of monitored animal species have plummeted by nearly 70 percent over the past half a century – a “devastating” loss to nature caused mainly by human activities. Moreover, in biodiversity-rich areas such as Latin America or the Caribbean, <a href="https://www.earth.com/news/losing-wildlife-will-be-very-costly-for-some-countries/">wildlife</a> population loss was found to be as high as 94 percent.&nbsp;



By examining data from 32,000 populations of over 5,000 species of mammals, fish, birds, amphibians, and reptiles, the scientists found "a devastating fall in wildlife populations, in particular in tropical regions that are home to some of the most biodiverse landscapes in the world," said Marco Lambertini, the director general of WWF International. The analyses revealed that freshwater species have declined more than those from any other habitat, with a staggering 83 percent population loss since 1970.



According to Mark Wright, the director of science at WWF, these findings are “truly frightening,” particularly in the case of Latin America. “Latin America is renowned for his biodiversity, and of course, it’s really important for lots of other things as well. It’s super important for regulating the climate. We estimate that currently there’s something like 150 to 200 billion metric tons of carbon wrapped up in the forests of the Amazon.” Thus, massive biodiversity loss in this region will likely have cascading consequences on the climate too.



The main drivers of wildlife loss are habitat degradation caused by development and farming, exploitation, pollution, climate change, disease, and the introduction of invasive species. To solve these problems, the world should urgently rethink its harmful and wasteful agricultural and industrial practices, before leading the global food chain to irremediable collapse.



“Food systems today are responsible for over 80 percent of deforestation on land, and if you look at the ocean and freshwater, they are also driving a collapse of fishery stocks and populations in those habitats,” Lambertini said.



Increasing conservation and restoration efforts, consuming food more sustainably, and quickly decarbonizing all sectors may alleviate the twin crises of biodiversity loss and climate change. Moreover, governments all over the world should properly factor into policymaking the value of the many services provided by nature, including food, water supplies, or medicines.



“We need to stress the fact that nature loss is not just a moral issue of our duty to protect the rest of the world. It is actually an issue of material value, an issue of security for humanity as well,” Lambertini concluded.



The Living Planet Report 2022 can be found <a href="https://livingplanet.panda.org/">here</a>.



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.



---



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

Wildlife populations have declined dramatically in recent years

According to a recently released assessment by the World Wildlife...

Bombus,Terrestrial,On,The,Flower,The,Buff,Tailed,Bumblebee,Or

A new study led by the <a href="https://www.qmul.ac.uk/">Queen Mary University of London</a> (QMUL) has found that bumblebees do not seem able to keep <a href="https://www.earth.com/news/insomnia-may-lead-to-memory-loss-in-adults/">memories</a> for how sweet a particular flower was, but instead only remember if it was sweeter than other flowers.



The researchers first trained bumblebees on two flowers, making them learn that one flower was sweeter than the other. Later on, they also learned that a third flower was sweeter than a fourth one. Then, the insects were given the choice between two of the flowers they had not seen together before, such as the first and the third, or the second and the third.



During the experiments, the bumblebees’ preferences indicated that they could only retain very basic ranking memories for the flowers for an extended period of time. While they could remember that a flower had been better or worse during the training phase, they did not seem capable of remembering for more than a few minutes how sweet or rewarding the flowers were on their own, or even how much sweeter they were compared to other flowers.



While humans and other animals, such as starlings, are able to keep memories for both absolute information (e.g. how sweet something is) and comparisons (if something is sweeter than something else), bumblebees seem unable to memorize absolute information.



“Our results reveal an intriguing divergent mechanism for how bumblebees retain and use information about options, compared to humans and birds,” said study co-lead author Yonghe Zhou, a doctoral student in Biological and Behavioral Sciences at QMUL.&nbsp;



&nbsp;“It may be that the different strategies used by bumblebees and humans may have evolved because of their different diets,” added study senior author Fei Peng, a psychologist at <a href="http://portal.smu.edu.cn/en/">Southern Medical University</a> in China. “Maybe because bumblebees evolved to mostly only eat flower nectar, they never needed to remember the details and could survive and thrive simply using simple comparisons.”&nbsp;&nbsp;



“Despite what may seem to be a poor memory strategy, bumblebees do very well in finding the most profitable flowers. It’s fascinating to consider how different animals, in their own ecological niche, can be similarly successful using such different strategies,” Yonghe concluded.



The study is published in the journal <a href="https://elifesciences.org/articles/78525">eLife</a>.&nbsp;



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.



---



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

How does the memory of bumblebees work?

A new study led by the Queen Mary University of...

Currently, many large-bodied mammals are endangered. By examining past evidence about large mammal extinctions, a team of researchers led by the <a href="http://www.unm.edu/">University of New Mexico</a> (UNM) has analyzed the potentially profound impacts of losing animals such as elephants, rhinoceros, or lions – known in the scientific community as “<a href="https://www.earth.com/news/megafauna-in-new-guinea-outlived-their-australian-relatives/">megafauna</a>” – on the ecosystems in which they are embedded.



“Humans are having drastic effects on large mammals, both directly, such as hunting, and indirectly through land use and climate change,” said Sam Scheiner, a program director in the <a href="https://www.nsf.gov/div/index.jsp?div=DEB">National Science Foundation’s Division of Environmental Biology</a>. “This study shows that these effects can have profound impacts on ecosystems.”



According to study lead author Felisa Smith, a biologist at UNM, the current conservation status of large-bodied mammals is “dire.” Their massive decline “has serious consequences because they have unique ecological roles.”



“But this sort of biodiversity loss has happened before,” Smith explained. “Humans entering the Americas at the terminal Pleistocene around 13,000 years ago caused a widespread extinction of the large-bodied mammals present then through some of the same activities that endanger mammals today.”



The scientists used the fossil records documenting this earlier extinction event to examine what happened to the surviving animals, by focusing on a mammal community in the Edwards Plateau of Texas. They characterized their diets by measuring stable isotopes in fossil bones, and estimated their body sizes by measuring their teeth and long bones, thus managing to reconstruct the ancient food web of the Pleistocene to better understand how it changed after extinction.



“We [found] significant reorganization of the community, particularly among carnivores, a loss of ecological complexity, and many vacant niches. The loss of complexity likely meant a reduction in ecosystem resilience,” the author reported.



Such ecosystem consequences are likely to emerge now too, with the decline of elephant, giraffe, rhinoceros, and other large-bodied mammal populations. Since these animals play a critical role in influencing ecological interactions and biochemical cycles, their loss would severely de-structure the ecosystems in which they currently live.



“It is critically important to understand how the decline or potential extinction of Earth’s last remaining large-bodied mammals might change ecosystems. We can’t afford to lose these large-bodied mammals,” Smith concluded.



The study is published in the journal <a href="https://www.pnas.org/doi/abs/10.1073/pnas.2115015119">Proceedings of the National Academy of Sciences</a> (PNAS).



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.



---



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

What will happen if modern large mammals become extinct?

Currently, many large-bodied mammals are endangered. By examining past evidence...

Glass,Globe,In,The,In,Nature,Concept,For,Environment,And

New research from the <a href="https://www.leeds.ac.uk/">University of Leeds</a> has revealed that <a href="https://www.earth.com/news/low-oxygen-zone-is-expanding-in-the-arabian-gulf/">oxygen</a> levels in the Earth’s atmosphere “fluctuated wildly” one billion years ago, which could have accelerated the development of early animal life.



Atmospheric oxygen is believed to be developed in three stages, starting with the Great Oxidation Event around two billion years ago, when oxygen first appeared in the atmosphere. During the third stage, around 400 million years ago, atmospheric oxygen rose to levels that exist today. &nbsp;



The second stage remains uncertain. This stage occurred during the Neoproterozoic Era, which started about one billion years ago and lasted for around 500 million years. This was when early forms of animal life emerged.  &nbsp;



Scientists have been trying to identify what led to the development of oxygen levels during this time that played a pivotal role in early evolution.  Did oxygen levels suddenly rise or was there a gradual increase? &nbsp;



Early animals known as Ediacaran biota were multi-celled organisms that required oxygen. These organisms&nbsp; have been found fossilized in sedimentary rocks that are 541 to 635 million years old. &nbsp;



To investigate, the research team used measurements of carbon, or carbon isotopes, found in limestone rocks taken from shallow seas. Based on the different types of carbon found, the researchers calculated photosynthesis levels that existed millions of years ago to infer atmospheric oxygen levels. &nbsp;



The experts used the data to produce a record of oxygen levels in the atmosphere over the last 1.5 billion years. This historical detail tells us how much oxygen would have been diffusing into the ocean to support early marine life.&nbsp;



Dr. Alex Krause, lead scientist on the project, said the findings give a new perspective on how oxygen levels were changing on Earth. “The early Earth, for the first two billion years of its existence, was anoxic, devoid of atmospheric oxygen. Then oxygen levels started to rise, which is known as the Great Oxidation Event." &nbsp;



“Up until now, scientists had thought that after the Great Oxidation Event, oxygen levels were either low and then shot up just before we see the first animals evolve, or that oxygen levels were high for many millions of years before the animals came along," said Dr. Krause.



“But our study shows oxygen levels were far more dynamic. There was an oscillation between high and low levels of oxygen for a long time before early forms of animal life emerged. We are seeing periods where the ocean environment, where early animals lived, would have had abundant oxygen - and then periods where it does not." &nbsp;



This periodic change in environmental conditions would have produced evolutionary pressures where some life forms may have become extinct and new ones could emerge, explained Dr. Benjamin Mills, who supervised the project. He noted that the oxygenated periods expanded “habitable spaces” – parts of the ocean where oxygen levels would have been high enough to support early animal life forms. &nbsp;



“When oxygen levels decline, there is severe environmental pressure on some organisms which could drive extinctions. And when the oxygen-rich waters expand, the new space allows the survivors to rise to ecological dominance.”



These habitable spaces lasted for millions of years, which provided enough time for early ecosystems to develop.&nbsp;



The study is published in the journal <a href="https://www.science.org/journal/sciadv">Science Advances</a>.



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.



---



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

Animal evolution was accelerated by fluctuating oxygen levels

New research from the University of Leeds has revealed that...

Coral reefs are home to much of the biodiversity in the ocean, which is now suffering from the rise of marine heat waves. This has led to <a href="https://www.earth.com/news/shifting-ocean-conditions-influence-chago-whale-migrations/">migration</a>, where Atlantic species are now appearing more frequently in the Arctic. 



Understanding how biodiversity will adapt to a warming ocean is difficult to identify because of the nature of evolution. While evolution allows species to adapt to new conditions, it also takes place over centuries, making it difficult to capture in laboratory experiments.&nbsp;



With the help of fossils, researchers can look into the past to evaluate how biodiversity changed during comparable climate changes. In a new study, marine geologists and palaeontologists from the <a href="https://www.uni-bremen.de/">University of Bremen</a> and ecologists from the University of Oldenburg have analyzed fossil plankton species in the Atlantic Ocean after the last ice age.&nbsp;



As the oceans continued to warm, the experts found that many species migrated to higher latitudes, as expected. Surprisingly, new species groups also formed in the process, and these group changes did not occur entirely in step with ocean warming.



For the investigation, the researchers looked at species composition of fossil plankton from the North Atlantic during the last ice age 24,000 years ago to the present warm period. This allowed researchers to track how marine biodiversity changed throughout the North Atlantic with the onset of the last warming in Earth's history (after the last ice age).&nbsp;



Unexpected patterns were discovered: the species composition of plankton continued to change even after temperature stabilized in the warm period.&nbsp;&nbsp;



“It has long been known that species assemblages change when their environment changes. For instance, when ocean temperatures rise, species migrate to higher latitudes. We can also observe this migration to higher latitudes in our data from the North Atlantic. But the amazing thing is that the 'native' species have not migrated at the same rate,” explained study co-author Anne Strack.&nbsp;



According to the researchers, this asymmetry between immigration and emigration led to the formation of novel species groups that did not exist anywhere on Earth during the ice age. “Even more astonishing, these newly thrown-together communities were not a transient phenomenon, but persisted for several thousand years,” noted Professor Michal Kucera.



The results provide important clues of how marine ecosystems will fare under continued ocean warming. The results also support computer simulations which suggest that future warming will lead to the formation of novel species communities.&nbsp;



The establishment of plankton communities could implicate key ecosystem functions through new direct or indirect ecological interactions. “This study also contributes to how we understand today's rapid biodiversity change, because it shows us that we will not see the response of marine life to present-day environmental changes until far into the future,” said Professor Helmut Hillebrand.



The study is published in the journal <a href="http://dx.doi.org/10.1038/s41559-022-01888-8">Nature Ecology &amp; Evolution</a>.



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.



---



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

Marine biodiversity could shift rapidly due to climate change

Coral reefs are home to much of the biodiversity in...

Many species of animals sport markings that subjectively appear to represent vertebrate eyes. These eyespots are conspicuous on the wings of <a href="https://www.earth.com/news/monarch-butterflies-are-officially-listed-as-endangered/">butterflies</a> and moths, on caterpillars, beetles, fish, reptiles and even some birds, and their potential functions have been discussed and debated by scientists for decades.&nbsp;



In some instances, large eyespots are thought to make an animal appear much bigger than it actually is, leading a predator to think twice about attacking. They are also assumed to protect a prey animal’s vital parts by directing the predator’s attention to the non-vital end (a prey is much more likely to survive a bite to its tail than its head). Most commonly, though, eyespots are assumed to appear intimidating to potential predators such that they choose not to attack at all.



Most of these hypothetical explanations suppose that predators actually see the paired spots as eyes, and not just as splashes of contrasting color that warn of toxicity or noxiousness. There are many conspicuous colors and patterns in the animal kingdom that are aversive to predators but look nothing like eyes – for example, the red and black patterns of certain locusts. Humans might perceive eyespots to look like eyes, but that doesn’t necessarily mean that predators do too. They may simply see ‘scary’ conspicuous markings.



In new research, John Skelhorn from the Biosciences Institute at Newcastle University, and Hannah Rowland from the Max Planck Institute for Chemical Ecology have tested whether eyespots are indeed perceived by predators as eyes. Furthermore, they investigated whether predators would respond more aversively to eyespots that faced them directly, appearing to glare menacingly at them, or to eyespots that faced away from them.



The researchers trained 126 domestic chicks (Gallus gallus domesticus) to run along a narrow 50 cm runway and peck a favorite prey item from the wall at the end. The prey item was initially a mealworm, but after the chicks were accustomed to pecking at the prey, the mealworm was subsequently covered with a triangular piece of grey paper representing wings. After a few days of training, all the chicks would run along the runway and attack the concealed mealworm within 2 seconds.&nbsp;



With the training complete, the researchers designed three alternative patterns to be placed on the paper wings. All the wings received a pair of markings that resembled eyes; the outside ring was white (against the grey background of the paper), while the inside circles were of darker grey, resembling an iris. On some of the wings, the iris was displaced to the left or right of the white circle, as though the eyes were looking to the left or to the right respectively. However, on others the iris was directly in the center of the white ring, as though the eyes were looking straight ahead.&nbsp;&nbsp;



Eyes that are depicted as staring straight ahead give rise to an optical illusion known as the Mona Lisa effect, after Leonardo da Vinci’s famously enigmatic painting. Such eyes appear to gaze directly at the observer, wherever he or she stands, be it to the left, right or in front of the staring eyes. Nature seems to have hit upon the same idea here, but in the animal kingdom it can be a matter of life or death. The researchers hypothesized that, if predators do indeed interpret eyespots as potential eyes, they will be more wary of eyespots that seem to stare directly at them.



The trained chicks were made to approach the prey from different angles by moving the runway into a left, central or right position. In addition, the eye spots on the prey’s wings either stared straight ahead or stared to one side, left or right. The researchers then timed how long it took a chick to approach and attack each type of ‘moth’ from each of the three directions.&nbsp;



The results, published in the journal <a href="http://dx.doi.org/10.3389/fevo.2022.951967">Frontiers in Ecology and Evolution</a>, show that chicks were slow to approach from the left when the moth’s eyespots were ‘looking’ to the left, and slow to approach from the right when the moth’s eyespots were ‘looking’ to the right. However, when chicks approached these moths from the opposite direction, there was no hesitancy and they ate the mealworm within about 20 seconds.&nbsp;



In the case of moths with concentric circle eyespots that appeared to gaze directly at the chicks, irrespective of the direction from which they approached, the time taken to eat the mealworm was between 100 and 170 seconds – some chicks failed to eat the prey at all, even though they were given up to 10 minutes to do so.&nbsp;



The researchers say their results show that the chicks perceived the artificial eyespots as actual eyes and that the eyespots were most effective when they appeared to gaze at the predator. This suggests that eyespots consisting of concentric circles could offer greater protection than eyespots with left- or right-shifted central circles in situations where individual predators approach from a range of different directions, just like the portraits that maintain eye contact from wherever you stand. They conclude that this probably explains why concentric circle eyespots are so common in nature.&nbsp;



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.



---



By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Eyespots on moth wings use optic illusion to deter predators

Many species of animals sport markings that subjectively appear to...

Through a randomized online experiment with 295 participants, a team of scientists led by the <a href="https://www.mpib-berlin.mpg.de/en">Max Planck Institute for Human Development</a> has investigated how traffic noise and <a href="https://www.earth.com/news/birdsong-frequency-is-influenced-by-sexual-selection/">birdsong</a> affect mood, paranoia, and cognitive functioning. The analysis revealed that listening to birdsong reduces anxiety and paranoia, thus contributing to mental health.



The participants listened to six minutes of either typical traffic noise or birdsongs. Before and after hearing these clips, the participants had to fill in questionnaires assessing their mental health and to perform a series of cognitive tests. 



“Everyone has certain psychological dispositions. Healthy people can also experience anxious thoughts or temporary paranoid perceptions,” explained study lead author Emil Stobbe, a postdoctoral fellow in Environmental Neuroscience at Max Planck.



“The questionnaires enable us to identify people’s tendencies without their having a diagnosis of depression, anxiety, and paranoia and to investigate the effect of the sounds of birds or traffic on these tendencies.”&nbsp;



While birdsong appeared to reduce anxiety and paranoia in healthy participants, it did not seem to have an influence on depressive states. By contrast, listening to traffic noise worsened such states, particularly if the audio clip involved many different types of traffic sounds. While the positive effect of birdsong on mood was already well-known, this study is the first to reveal a positive effect on paranoid states. However, neither birdsong nor traffic noise influenced cognitive performance.



According to the researchers, birdsong could be a subtle indication of an intact natural environment, detracting the listeners’ attention from environmental stressors which could otherwise signal an acute and imminent threat. These findings suggest the possibility of applications in the treatment of mental illness, such as the active manipulation of background noise in various situations or the examination of its influences on people suffering from anxiety disorders or paranoia.



„Birdsong could also be applied to prevent mental disorders. Listening to an audio CD would be a simple, easily accessible intervention. But if we could already show such effects in an online experiment performed by participants on a computer, we can assume that these are even stronger outdoors in nature,” Dr. Stobbe said.



“We were recently able to perform a study showing that a one-hour walk in nature reduces brain activity associated with stress,” added senior author Simone Kühn, a professor of Environmental Neuroscience at Max Planck. “We cannot say yet which features of nature – smells, sounds, color, or a combination thereof – are responsible for the effect. The present study provides a further building block to clarify this issue,” she concluded.&nbsp;



The study is published in the journal <a href="https://www.nature.com/articles/s41598-022-20841-0">Nature Scientific Reports</a>.



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.



---



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

Listening to birdsongs can improve mental health

Through a randomized online experiment with 295 participants, a team...

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



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



---



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

[sendtonews key="0ynNMYkMKa-2340414-12187" type="single"] Today’s Video of the Day from the...

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



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;



---



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

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

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



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;



---



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

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

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



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;



---



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

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

<div class="wp-block-sendtonews-playerselector">[sendtonews key="X0f6OHYoI4-2310561-12187" type="single"]</div>



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



---



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?

[sendtonews key="X0f6OHYoI4-2310561-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="JRaP49ISmm-2357509-12187" type="single"]</div>



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



---



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

[sendtonews key="JRaP49ISmm-2357509-12187" type="single"] Today’s Video of the Day from the...

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

<div class="wp-block-sendtonews-playerselector">[sendtonews key="e4ZG0Jawp3-2374785-12187" type="single"]</div>



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;



---



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

[sendtonews key="e4ZG0Jawp3-2374785-12187" type="single"] Astronomers at Johns Hopkins University have created...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="uV9Lh2fQbV-1760058-12187" type="single"]</div>



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;



---



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"

[sendtonews key="uV9Lh2fQbV-1760058-12187" type="single"] Lesotho: Africa's "Kingdom in the Sky" Today’s...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="qjvhBOBnY8-2426650-12187" type="single"]</div>



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;



---



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

[sendtonews key="qjvhBOBnY8-2426650-12187" type="single"] Today's Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="oL4FnPTGCV-2384527-12187" type="single"]</div>



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



---



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

[sendtonews key="oL4FnPTGCV-2384527-12187" type="single"] Today's Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="0879czfG3k-1785905-12187" type="single"]</div>



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



---



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

[sendtonews key="0879czfG3k-1785905-12187" type="single"] Today’s Video of the Day from NASA...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="6HyfrAJTBI-1831843-12187" type="single"]</div>



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



---



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

[sendtonews key="6HyfrAJTBI-1831843-12187" type="single"] Today’s Video of the Day from the...

Earth,Like,Exoplanet,3d,Render

<div class="wp-block-sendtonews-playerselector">[sendtonews key="QIoVYJqRBi-2434608-12187" type="single"]</div>



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)



---



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...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="JbW4VsY53O-1632195-12187" type="single"]</div>



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;



---



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



---



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...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="qARzJPSabQ-2270617-12187" type="single"]</div>



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;



---



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

[sendtonews key="qARzJPSabQ-2270617-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="qas3EhyI0Y-2220951-12187" type="single"]</div>



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



---



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

[sendtonews key="qas3EhyI0Y-2220951-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="vpljfR2VBX-2560867-12187" type="single"]</div>



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



---



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

[sendtonews key="vpljfR2VBX-2560867-12187" type="single"] Today's Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="MHyhtebibJ-2200368-12187" type="single"]</div>



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;



---



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

[sendtonews key="MHyhtebibJ-2200368-12187" type="single"] Today’s Video of the Day from NASA...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="761m2QQvR1-2035772-12187" type="single"]</div>



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;



---



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...