Today's Image of the Day from <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> features tidal currents in the western Sea of Okhotsk in the Russian Far East. The Shantar Islands and Uda Bay are also visible in the natural-color photo.



According to NASA, the currents around the Shantar Islands are heavily influenced by the strong tides and by freshwater discharge from rivers draining into Uda Bay.&nbsp;



Some of the highest diurnal tides in the world have been recorded in the Sea of Okhotsk. In the Russian Far East, narrow bays funnel and amplify the incoming tides, making it a prime location for tidal power generation, reports NASA.



The image was captured on September 24, 2021, by the Operational Land Imager (OLI) on Landsat 8.



Image Credit: NASA Earth Observatory&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

Colorful currents in the Sea of Okhotsk

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

A full-grown dog, Barrie continued to live happily with Sean. After going through so much together, there's no doubt that this pair would never let anything split them apart ever again. Photo credit: ITV / Ken McKay

A full-grown dog, Barrie continued to live happily with Sean....

We've heard a lot about animals going extinct, but could one of these long-lost creatures be making a comeback? Not just any animal, either, but a fearsome predator. Researchers at Mount Rainier National Park spotted a beast they thought had gone forever from the area. And they were shocked, confused — and may just have wondered what this means for our planet. CrimJDegreeSchools/YouTube

Park Officials Spotted A Strange Creature Not Seen For Over A Century

We've heard a lot about animals going extinct, but could...

Climber Talking on Cellular Phone on Mountain

When members of the Cascades Carnivore Project (CCP) trekked into Mount Rainier National Park, they had high hopes. The conservation team aimed to protect at-risk animals, and they knew Mount Rainier was packed full of 'em. Still, they never expected to run into a critter they thought was long extinct. Photo credit: Bohemian Nomad Picturemakers/CORBIS/Corbis via Getty Images

Cascades Carnivore Project

When members of the Cascades Carnivore Project (CCP) trekked into...

Climbers Scaling Mount Rainier

Geared up, the researchers trudged through the snow and battled the high slopes, hoping to set up cameras in the most remote parts of the park. Only by going off-trail, where no tourists or lost hikers roamed, could they understand what was really living in the area. Photo credit: Bohemian Nomad Picturemakers/CORBIS/Corbis via Getty Image

Deep Into The Woods

Geared up, the researchers trudged through the snow and battled...

Researchers set up discreet cameras all throughout the Mount Rainier wilderness. Through recording devices directed at trees, creeks, open meadows, and terrains of all kinds, CCP experts and volunteers hoped they would discover something truly never seen before. The Pacific Northwest was an environment full of lore, after all. Photo credit: Cool Green Science / YouTube

Cameras

Researchers set up discreet cameras all throughout the Mount Rainier...

By combining tree-ring data with U.S. Forest Service inventory data on Arizona’s ponderosa pines, a recent study led by the <a href="https://www.arizona.edu/">University of Arizona</a> has investigated the possible future effects of climate change on tree growth. The results suggest that global warming may cause a 56 to 91 percent decline in individual tree growth.



Forests <a href="https://www.earth.com/news/carbon-sinks-are-a-powerful-weapon-against-climate-change/">remove carbon dioxide</a> from the atmosphere, thus offsetting greenhouse gas emissions and helping to mitigate climate change. “It's a free service that forests provide, so forests have been touted as one of the many natural climate solutions that countries rely on to offset their emissions," said study lead author&nbsp;Kelly Heilman, a postdoctoral researcher in the University of Arizona’s&nbsp;<a href="https://ltrr.arizona.edu/">Laboratory of Tree-Ring Research</a>.&nbsp;



“But competition between trees, droughts and disturbances can reduce forest carbon uptake. Knowing how much carbon forests take up globally is essential to addressing the climate crisis and planning for a resilient future.”



The massive declines in tree growth that Dr. Heilman and her colleagues are forecasting will mean less uptake of atmospheric carbon dioxide in the future by Arizona's forests. “While Arizona's forests are relatively small in terms of their contribution to the total U.S. carbon sequestration, our approach can be used to make the same predictions for forests around the world,” she explained.



The causes of tree size decline are complex and varied, but the main one seems to be global warming. Since trees have to work against gravity to get water to their top, if temperatures rise, the water-transport system will be under increasing pressure and most likely become damaged. Warming will make trees more drought stressed, and reduce their growth.&nbsp;



Although drought seems to make taller trees more vulnerable due to high temperatures, the scientists found that small trees will also suffer due to lack of water. Since their roots are smaller, they will need to struggle more to extract moisture from the soil.



Moreover, denser forests will likely fare worse during hotter and drier conditions, since there will be more competition between trees for increasingly rare resources such as water and nutrients. “Foresters can't influence the climate, but they can change forest density to reduce competition for the remaining trees,” said study co-author Margaret Evans, an assistant professor of Dendrochronology in the tree-ring lab. “If you have both an overly dense forest and climate warming happening at the same time, that's a double whammy. But if you thin the forests, you can remove one source of stress.”



In order to improve their tree growth predictions in future work, the scientists aim to include variables such as wildfires or insect disturbances into their analyses.



The study is published in the journal <a href="https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcb.16038">Global Change Biology</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

Global warming will cause massive declines in tree growth

By combining tree-ring data with U.S. Forest Service inventory data...

Domestic dogs show more variation in body size than any other mammal on Earth. There is a 40-fold difference in size between the smallest and largest <a href="https://www.earth.com/news/breeding-practices-threaten-the-health-of-french-bulldogs/">breeds</a> of dogs. Variations in size have been selected for by humans, particularly in the past 200 years, while wolves, from which dogs originated, have maintained a constant size.



Since wolves are fairly large, people believed that ancestral dogs were also this size at the start of domestication. It is commonly understood that small dogs, such as Pomeranians and Chihuahuas, were selectively bred after domestication because humans wanted cute little companions.&nbsp;



However, scientists from the <a href="https://www.nih.gov/">National Institutes of Health</a> (NIH) have recently identified a mutation in a gene that regulates the production of growth hormone in dogs. The researchers found that this genetic mutation is present in the genes of dogs with small bodies, but was also present in wolves more than 50,000 years – long before domestication took place.&nbsp;



By analyzing 200 different breeds of dogs, the experts identified around 20 genes that are associated with the regulation of body size in dogs. These genes are involved in regulating skeletal development, insulin processing and fatty acid metabolism, among other functions. Of these genes, insulin-like growth factor 1 (IGF-1) controls 15 percent of body size variation in different dog breeds and has a major role in determining body size.&nbsp;



However, after more than ten years of investigation, the researchers had not been able to identify a functional mutation associated with IGF-1. That was until Jocelyn Plassais, a postdoc student in geneticist Elaine Ostrander’s lab in Maryland, suggested that they search for sequences around the gene that were positioned backwards. She identified the mutated allele in this way and the researchers then analyzed the genomes of 1,431 individual canids from 13 different species, to track the history of this mutated form of the IGF1 gene.&nbsp;



The researchers also collaborated with evolutionary biologists Greger Larson, at Oxford University, and Laurent Franz, at Ludwig Maximilian University, to examine ancient wolf DNA to see when the&nbsp;IGF-1&nbsp;mutation first appeared. Scientists have theorized that dogs started out large and became smaller about 20,000 years ago, when they were domesticated, but this discovery presents the possibility of a new evolutionary narrative.



The analysis of ancient wolf DNA revealed that the mutated form of the IGF-1 gene was indeed present in the DNA of a 54,000-year-old Siberian wolf (Canis lupus campestris), long before domestication took place.&nbsp;



“It’s as though Nature had kept it tucked in her back pocket for tens of thousands of years until it was needed,” said Ostrander.



The mutated form was found not only in dogs and wolves, but also in other species of the canid family, including coyotes, jackals, and African hunting dogs.&nbsp;



“This is tying together so much about canine domestication and body size, and the things that we think are very modern are actually very ancient,” explained Ostrander.



It seems that the ancestral form of the gene is associated with small body size, while a derived form of the gene gave rise to larger body size and is currently commonly found in gray wolves and large dogs. The allele associated with small body size is thought to have almost become extinct during Pleistocene times when the wolves of the time vanished. But the allele made is reappearance more recently when humans began to selectively breed smaller dogs.&nbsp;



Ostrander and her team plan to continue to investigate the genes that regulate body size in dogs. “One of the things that is pretty cool about dogs is that because they have evolved so recently there aren’t actually a lot of body size genes."&nbsp;



Canids have only 25 known genes that regulate body size, compared to several hundred in humans. “I really want to understand the whole continuum - from Chihuahuas to Great Danes,” said Ostrander.



The study is published in the journal <a href="https://www.cell.com/current-biology/home">Current Biology</a>.



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

Small dogs have a gene mutation that existed in ancient wolves

Domestic dogs show more variation in body size than any...

Rising sea levels introduce salt water into coastal wetlands, and this has effects that can be seen well above the high-tide level. Although these effects have been studied for coastal salt <a href="https://www.earth.com/news/marshes-protect-shorelines-against-inclement-weather/">marshes</a> with their salt-tolerant plant communities, the same cannot be said for coastal wetlands that lie further inland and are characterized by the presence of fresh water.&nbsp;



The Albemarle-Pamlico Peninsula covers more than 2,000 square miles on the North Carolina coastal plain. It is a vast expanse of forested swamps and tea-colored creeks that lie in a location currently experiencing a sea level rise of 3–4 mm each year. Much of this area lies a few feet above sea level and is flooded by ocean surges that are driven by storm systems and rising sea levels.&nbsp;



The salinity of sea water is 400 times that of fresh water, and the salt that remains behind after an ocean intrusion recedes gradually increases the salinity to intolerable levels for the wetland plant species. This can lead to changes in plant communities as more salt-tolerant species become established.



In a recent study, researchers from <a href="https://duke.edu/">Duke University</a> and North Carolina State University surveyed the low-living plant communities that inhabit the waterlogged soils of the wetlands on this peninsula. The goal was to identify whether ground layer plants exhibit threshold responses to salinity exposure and whether this could provide early warning of salinity increases in other coastal wetlands.&nbsp;&nbsp;



The team was led by Professors&nbsp;Justin Wright&nbsp;and&nbsp;Emily Bernhardt&nbsp;of Duke and&nbsp;Marcelo Ardón&nbsp;of NC State. The researchers conducted two vegetation surveys throughout the Albemarle-Pamlico Peninsula.&nbsp;They focused on 112 species of understory plants that occur in the region and recorded where they were found and how abundant they were in relation to levels of salt in the soil.&nbsp;



“It's hard fieldwork,” said study co-author Steve Anderson. “It gets really dense and scratchy. That, plus the heat and humidity mixed with the smell of sulfur and the ticks and the poison ivy; it just kind of adds up.”



The researchers then used multidimensional scaling methods to identify the factors driving community composition change in these wetlands. They found that two factors, salinity and elevation, explained 64 percent of the variation in community composition. In addition, the team identified two salinity thresholds that were associated with major changes in plant community composition.&nbsp;



The researchers found a "tipping point," around 265 g sodium ions per g of soil, and another at 3,843 g Na+/g, where established plant communities could not tolerate further increases in salinity. Subsequent increases were associated with disproportionately large changes in the plant communities that were present.&nbsp;



For example, above the first critical threshold (265 g Na+/g), the plant community on the marsh floor suddenly shifts, as plants such as wax myrtle, swamp bay and pennywort are replaced by rushes, reeds and other plants that can better tolerate salty soils.



Overall, the results show that ground layer plants can be used as reliable indicators of salinity thresholds in coastal wetlands, said the study authors. These results can be used for monitoring salt exposure of ecosystems and for identifying areas at risk for undergoing future community shifts.



The hope is that monitoring indicator species like these could help researchers spot the early warning signs of salt stress, explained Anderson.



The study is published in the journal <a href="https://www.springer.com/journal/11258">Plant Ecology</a>.



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

Coastal wetlands can become too salty for some resident plants

Rising sea levels introduce salt water into coastal wetlands, and...

How life adapts to extreme or demanding environments is a persistent question in evolutionary biology. Arid <a href="https://www.earth.com/news/natural-environments-play-an-overlooked-role-in-public-health/">environments</a> such as the desert region of central Australia can be very harsh, especially for a fish.&nbsp;



New research from the Molecular Ecology Lab at <a href="https://www.flinders.edu.au/">Flinders University</a> focused on Australia’s desert rainbow fish (Melanotaenia splendida tatei). The scientists showed that genetic adaptations to dry conditions can allow entire populations of fish to survive.&nbsp;



"How populations of aquatic fauna persist in extreme desert environments is an enigma," wrote the study authors. "Individuals often breed and disperse during favorable conditions. Theory predicts that adaptive capacity should be low in small populations, such as in desert fishes."



The experts compared variations in genetics from different populations of desert rainbow fish with satellite images showing water in central Australia. They found that populations of rainbow fish from drier areas were smaller but had a greater ability to adapt to dry conditions.&nbsp;&nbsp;&nbsp;&nbsp;



“This turns on its head traditional thinking that small populations are evolutionary dead ends. Life finds a way, even in the most extreme and unpredictable environments on Earth,” said Professor Luciano Beheregaray.



A large gene pool is important for the survival of any species, novel genes are the raw material that evolution works with. This made the survival of small populations of fish living in dry, demanding environments that much more surprising.&nbsp;



“A small gene pool can lead to inbreeding and poor health, which is sometimes seen in endangered species,” explained study lead author Dr Catherine Attard. “However, we found that desert fish in Australia can hold on to life through adapting to harsh environments, then breeding and spreading during rare flooding events.”



Interestingly, even though the fish populations seem isolated, gene flow occurs when periodic flooding connects different populations. This seems to be a key to the survival of these small populations.&nbsp;&nbsp;



The Flinders team collaborated with experts from Laval University and the University of Canberra.&nbsp; The study is published in the journal <a href="https://onlinelibrary.wiley.com/journal/15585646">Evolution</a>.



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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

How does a fish survive in the desert?

How life adapts to extreme or demanding environments is a...

Song sparrows are a widespread <a href="https://www.earth.com/news/the-song-of-the-east-african-sunbird-may-be-a-million-years-old/">songbird</a> in North America. Among them, only males sing in order to defend their territory and court mates. They usually have a “repertoire” of up to 12 different two-seconds songs, which can take nearly 30 minutes to get through, because they repeat the same song several times before starting another track. 



A new study led by <a href="https://duke.edu/">Duke University</a> and the <a href="https://welcome.miami.edu/">University of Miami</a> has found that song sparrows deliberately shuffle and mix their song repertoire, probably as a way to keep it interesting for their female audiences.



The researchers recorded the songs of over 30 birds in the backwoods of northwest Pennsylvania and found that male sparrows can keep quite an accurate track of the order of their songs and how often each song is played for over half an hour, possibly in order to avoid repetition and build up hype and novelty.&nbsp;



The more a sparrow sang a particular song, the longer he took to get back to that song. For example, if Song A was played ten times in a row, the bird would sing more renditions of other songs before returning to Song A. However, if Song A was played just two or three times, the bird would usually recite a shorter rendition of the other songs in order to return faster to the relatively new and underplayed Song A.



These findings suggest that song sparrows are capable of “long-distance dependencies” – the ability to choose what to sing at a given point by taking into account what they sang up to half an hour before. According to the scientists, this is a 360 times larger memory capacity than the canary’s (the previous record holder), who can only juggle about five seconds of song information in this way, and makes male sparrow song much more similar to human language than any other animal’s vocal behavior.



Further research is needed to understand why this impressive trait emerged and evolved. The current hypothesis is that it may help keep females interested and less bored, much like shuffling a Spotify playlist keeps us entertained during a gym session. “You've got your playlist for running and the reason you've got that is because running is kind of boring,” said study senior author Stephen Nowicki, a professor of Biology at Duke University. “You know that these 10 songs are going to keep you motivated, but if you are going to run for 20 songs long, why not shuffle it so the next time you don't hear the same songs in the same order?”&nbsp;



The study is published in the journal <a href="https://royalsocietypublishing.org/doi/10.1098/rspb.2021.2473">Proceedings of the Royal Society B Biological Sciences</a>.



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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

Song sparrows shuffle and mix their tunes

Song sparrows are a widespread songbird in North America. Among...

Many animals, such as salamanders, starfish, crabs, or <a href="https://www.earth.com/news/lizards-regenerate-perfect-tails-through-stem-cell-therapy/">lizards</a>, have the capacity of full regeneration of at least some of their limbs. Other creatures, such as flatworms, can even be cut into pieces, and each piece will soon reconstruct an entire organism. However, in humans and other mammals, the loss of a large and structurally complex limb, like an arm or a leg, cannot be restored by any natural process of regeneration.



A research team led by <a href="https://www.tufts.edu/">Tufts University</a> and <a href="https://www.harvard.edu/">Harvard University</a> has recently managed to trigger regrowth of a lost leg in adult frogs by using a five-drug cocktail sealed in a silicone wearable bioreactor dome which they applied over the frog’s stump for a period of 24 hours. This is a crucial first step towards helping not only amphibians, but also mammals (including humans) regenerate lost limbs.



Each of the drugs fulfilled a different purpose, such as diminishing inflammation, inhibiting collagen production which would lead to scarring, and encouraging the growth of new nerve fibers, blood vessels, and muscles. This mixture of drugs combined with the use of the sealed, amniotic-like bioreactor created a perfect environment to inhibit the natural tendency to close off the stump, while promoting the regenerative process.



The scientists noticed a rapid, extraordinary growth of tissue in many of the treated frogs, re-creating an almost fully functional leg.&nbsp;



“It’s exciting to see that the drugs we selected were helping to create an almost complete limb,” said study lead author Nirosha Murugan, a research affiliate at Tufts University.&nbsp;



“The fact that it required only a brief exposure to the drugs to set in motion a months-long regeneration process suggests that frogs and perhaps other animals may have dormant regenerative capabilities that can be triggered into action.”



Within the first few days after treatment, Professor Murugan and her colleagues detected the activation of molecular pathways that are normally used in a developing embryo to help the body form. Instead of requiring prolonged therapeutic interventions, the activation of these pathways could allow the burden of growth and organization to be handled by the limb itself.



“Covering the open wound with a liquid environment under the BioDome, with the right drug cocktail, could provide the necessary first signals to set the regenerative process in motion,” said study corresponding author Michael Levine, a professor of Biology at Tufts.&nbsp;



“It’s a strategy focused on triggering dormant, inherent anatomical patterning programs, not micromanaging complex growth, since adult animals still have the information needed to make their body structures.”&nbsp;&nbsp;



The study is published in the journal <a href="https://www.science.org/doi/full/10.1126/sciadv.abj2164">Science Advances</a>.



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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

Scientists can help frogs grow new limbs

Many animals, such as salamanders, starfish, crabs, or lizards, have...

Autoimmune diseases are chronic conditions that occur more frequently as people age. They occur when the body’s natural defense system mistakenly attacks its own, normal cells. Common autoimmune conditions include rheumatoid <a href="https://www.earth.com/news/yoga-pain-depression-arthritis/">arthritis</a>, psoriasis, polymyalgia rheumatica (pain and stiffness in the muscles around the shoulders, neck and hips) and thyroid diseases. These conditions affect people more frequently as they age.&nbsp;



There are no effective treatments for autoimmune diseases, and they represent a major social and economic burden to health systems. A new study tested whether taking daily supplements of vitamin D or omega-3 fatty acids from marine fish, or a combination of both, could reduce the incidence of autoimmune diseases among older adults in the United States.&nbsp;



The research, which was conducted over five years, provides the first direct evidence that taking daily supplements of vitamin D or omega-3 fatty acids reduces the risk of autoimmune disease among older adults.



Scientists from Harvard Medical School and from Brigham and Women’s Hospital conducted a nationwide, randomized, double-blind, placebo-controlled trial using 25,871 volunteer participants (average age 67; 51 percent women; 71 percent non-Hispanic white people) from disparate locations throughout the US.&nbsp;



Upon joining the trial, participants gave information about their age, ethnicity, region of residence, income, education, lifestyle, weight, medical history, diet and supplement use. Blood levels of vitamin D and omega-3 fatty acids were also measured at this point.



Participants were then randomly selected to receive a supplement of vitamin D (2,000 IU/day) or a matched placebo, and/or a supplement of omega-3 fatty acids (1,000 mg/day) or matched placebo. The participants were asked to report any diagnosed autoimmune disease over the subsequent 5.3 years. Diagnosed cases were confirmed using medical records. There were also cases that had insufficient documentation for confirmed diagnosis, and these were classed as “probable” cases.



During the trial period, a confirmed disease was diagnosed in 123 participants in the vitamin D group, whereas 155 instances of autoimmune disease were diagnosed in the associated placebo group – a 22 percent lower relative rate.



In the omega-3 fatty acid group, 130 confirmed cases were diagnosed compared with 148 in the placebo group (representing a 15 percent reduction), but this was not a statistically significant result. However, when probable cases were included, omega-3 fatty acid supplements did significantly reduce the rate by 18 percent compared with the placebo group. The effects of supplementation with these two substances were stronger the longer a patient had been taking the supplements.&nbsp;



The researchers say the findings have far-reaching implications, “given that these are well-tolerated, non-toxic supplements, and that there are no other known effective therapies to reduce rates of autoimmune diseases.”



Similar results were found when data from only the last three years of the trial were analyzed. The vitamin D group had 39 percent fewer confirmed cases than the placebo group, while the omega-3 fatty acid group had 10 percent fewer confirmed cases than were recorded in the placebo group. Both vitamin D and omega-3 fatty acid supplements decreased autoimmune disease by about 30 percent when compared to results recorded from participants that received the placebo alone.&nbsp;



According to the study authors, this is the first direct evidence that daily supplementation with either agent – or a combination of vitamin D and omega-3 fatty acids – for five years among older US adults reduces autoimmune disease incidence, with more pronounced effect after two years of supplementation.



“We are continuing to follow participants for two years in an extension study to test the time course of this autoimmune disease reduction effect,” wrote the researchers. “Further trials could test these interventions in younger populations, and those with high autoimmune disease risk."



The study is published in the <a href="https://www.bmj.com/">British Medical Journal</a>.



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

Vitamin D reduces the risk of autoimmune disease

Autoimmune diseases are chronic conditions that occur more frequently as...

A,Red,Squirrel,Eating,A,Nut,On,A,Moss,Trunk

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Today’s Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> explores how climate change may affect hibernating animals, and whether more animals will begin to hibernate in a warmer world.  Hibernation is a type of dormancy in which animals decrease their activity. During this period, animals usually experience reduced body temperatures, lower heat rate, and a slower metabolism.



There are two main types of hibernation. Obligatory hibernation involves a fixed yearly rhythm. Facultative hibernation takes place when environmental conditions change, such as when the days get shorter, temperatures drop, or food becomes scarce.&nbsp;



Animals hibernate as a result of extremely hot or cold temperatures. They build up fat stores so that they can survive dormant periods that can last for months at a time.&nbsp;



According to ACS, climate change may prevent animals from being able to build up their fat storage. Warmer summers and droughts will lead to lower food availability. This means that facultative hibernation patterns will be especially disrupted by climate change.&nbsp;



The genes needed for dormancy and hibernation are actually found in many animals, including humans. These genes could be switched on when the environmental conditions, such as climate or food availability, require an animal to hibernate.&nbsp;



ACS reports that scientists have already started to see animals like squirrels and bears emerge from hibernation early due to warming winters. As a result, they are waking up when their food sources are not ready, or when there is more competition for food.&nbsp;



Video Credit: American Chemical Society&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

Our warming climate is changing how animals hibernate

[sendtonews key="voegmDSuh1-1757925-12187" type="single"] Today’s Video of the Day from the...

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The Shetland Islands of Scotland Today's Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features the Shetland Islands, an archipelago in the Northern Isles of Scotland. Among the 100 islands and islets that make up the archipelago, less than 20 are inhabited.&nbsp;



The main town and port of the Shetland Islands is Lerwick, which is the capital of the largest island known as the Mainland.



Scotland is hosting this year's United Nations climate change conference (COP26) from October 31 to November 12. ESA has a strong presence at COP26, demonstrating how satellite data can help scientists gain a better understanding of climate from space.&nbsp; The&nbsp;Shetland Islands&nbsp;lie off the northeast coast of Scotland. Inhabited since around 3000 BC, the&nbsp;Shetland Islands&nbsp;were controlled by the Vikings and then later, Norway for several centuries. Today, the island still honors its Scandinavian heritage in its music, dialect, festivals and cuisine. 



Shetland (Scots: Shetlan), also called the Shetland Islands and formerly Zetland, is a subarctic archipelago of Scotland that lies northeast of&nbsp;Great Britain. The exotic location of the coast-swept isle known as "Storm Island" which features in the second part of this movie was portrayed in this film by The&nbsp;Isle of Mull. 



Video 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

The Shetland Islands of Scotland

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The city of Perth in Western Australia Today's Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Perth, the capital city of Western Australia.



The metropolitan area of Perth is a 125-kilometer region along the coast that stretches from Two Rocks in the north to Singleton in the south.



Prior to European colonization, the area was inhabited by the Whadjuk Noongar people for over 40,000 years. At that time, Perth was called Boorloo by the Aboriginals. The official estimation of the Greater Perth population as of June 2017 is 2,050,138 people. West Perth,&nbsp;Western Australia. West Perth is an inner suburb of Perth, the capital city of&nbsp;Western Australia&nbsp;. Formerly an exclusive suburb for wealthy merchants and politicians, it is now part of the inner mixed zone, and has predominantly office blocks which have displaced residential buildings.



Perth is one of the most isolated cities in the world. Brisbane, the nearest city, is about 2,000 kilometers away.&nbsp; Perth is the capital of&nbsp;Western Australia&nbsp;and is the sunniest capital in Australia, with almost 8 hours of sunshine each day. The easiest way to explain the climate is that it has a mixture of the Californian and&nbsp;Mediterranean&nbsp;climates, with mild winters and hot dry summers.



Video 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

The city of Perth in Western Australia

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Violent volcanic eruptions persisted on Mars for millions of years Today’s Video of the Day from <a href="https://www.nasa.gov/">NASA</a> describes violent volcanic eruptions that transformed the surface of Mars for hundreds of millions of years. 



The experts analyzed minerals from the Arabia Terra region in northern Mars. They found evidence that thousands of “super eruptions" ripped through Mars about four billion years ago. 



The scientists estimate that the explosive activity persisted for about 500 million years.&nbsp;Detailed photographic studies by NASA’s Global Surveyor (starting in 1997), and the Mars Express High Resolution Stereo Camera (which began orbiting Mars in December of 2003), provide evidence of effusive volcanism perhaps as young as 2 to 2.5 million years.



This giant shield volcano is almost entirely constructed of basalt lava flows. It has a height of nearly 25 km (16 mi) above Mars' surface and a diameter of 600 km, making it about as large as Arizona. 



NASA scientists studying volcanic rocks from Mars came to the conclusion that the red planet´s volcano, Mount Olympus, is not dead or dormant but in fact an active volcano whose last eruption might have been as recent as a few years to decades ago.  it was discovered that Mars is the product of a myriad of “super-eruptions” that went on for 500 million years. 



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

Violent volcanic eruptions persisted on Mars for millions of years

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Today’s Video of the Day from the <a href="https://www.nsf.gov/">National Science Foundation</a> explains that most of the elements that make up the Earth, humans, and all living creatures were formed in stars. Powerful stellar explosions are the source of many of the elements of the periodic table, including those that make up the human body.



According to Live Science, the carbon, nitrogen and oxygen atoms in the human body - as well as atoms of all other heavy elements - were created in previous generations of stars over 4.5 billion years ago. Professor Chris Impey from the University of Arizona explained that because humans and all animals contain these elements, we are literally made of star stuff.



Dr. Ashley King is a planetary scientist and meteorite researcher at the Natural History Museum."It is totally 100% true: nearly all the elements in the human body were made in a star and many have come through several supernovas," said Dr. King.



He explained that it's very likely that there are a whole bunch of different stars that have contributed the elements we see in our own solar system, our planet, and those found within human bodies.&nbsp;



"At the atomic scale, we are all made of the same things. Where did those atoms come from? Every element was forged in the cosmos, from stars that collapse and collide to black holes that fire jets deep into space," reports the National Science Foundation.



"Not only are we 'made of star stuff,' we are made of atoms that were forged in some of the most intense environments in the universe."



NASA gets very specific on the subject, noting that the hydrogen in your body, present in every molecule of water, came from the Big Bang.&nbsp;



"There are no other appreciable sources of hydrogen in the universe," said NASA. "The carbon in your body was made by nuclear fusion in the interior of stars, as was the oxygen. Much of the iron in your body was made during supernovas of stars that occurred long ago and far away."



Video Credit: National Science Foundation



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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

Earth, humans, and all living creatures are made from stars

[sendtonews key="MYeYoKj4GF-1724382-12187" type="single"] Today’s Video of the Day from the...

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Cleaning up oil using bacteria Today's Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> describes how bacteria could potentially be used to help clean up oil spills.&nbsp;



After the Deepwater Horizon disaster, oil continued to spill into the ocean for three months. As experts were trying to get the situation under control, bacteria were already helping to eliminate oil in the ocean by absorbing and metabolizing it.&nbsp;



Bacteria can also remove other harmful substances from the environment. For example, some species of bacteria can be used to soak up uranium, the radioactive element used in nuclear reactors. Other types of bacteria, meanwhile, could help us clean up oil spills by chowing down large quantities of oil. Say hello to marine microorganisms that can degrade several major chemical components of oil by using these hydrocarbons as a source of energy. By doing so, they can effectively assist in clean-ups following oil spills.



Microbes also have considerable potential when it comes to cleaning up the mess oil sometimes makes. “There are a wide variety of microbes that are able to degrade hydrocarbons in oil, (and) some are better at it than others,” Li said.



Video Credit: American Chemical Society&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

Using bacteria to clean up oil

[sendtonews key="AZTP0oqNB7-1593464-12187" type="single"] Cleaning up oil using bacteria Today's Video...