Every year, the night sky fills with the unseen movement of millions of migrating songbirds, tracing routes carved by evolutionary history.&nbsp;



While these flight paths are largely guided by innate instincts, new research from the <a href="https://illinois.edu/" target="_blank" rel="noreferrer noopener">University of Illinois Urbana-Champaign</a> suggests an unexpected social dimension to their nocturnal journeys.&nbsp;



Evidence from over 18,300 hours of acoustic recordings reveals that <a href="https://www.earth.com/news/songbirds-benefit-from-social-networks-during-migration/" target="_blank" rel="noreferrer noopener">songbirds</a> may “talk” to other species as they migrate, potentially sharing information and forming temporary social bonds along the way.



<h2 class="wp-block-heading" id="h-migration-may-not-be-a-solitary-endeavor">Migration may not be a solitary endeavor</h2>



The study, led by Benjamin Van Doren, an assistant professor in the Department of Natural Resources and Environmental Sciences at Illinois, offers a fresh perspective on the traditionally individualistic view of songbird migration.&nbsp;



The research, initiated at the <a href="https://www.birds.cornell.edu/home/" target="_blank" rel="noreferrer noopener">Cornell Lab of Ornithology</a>, indicates that birds may vocalize during flight to signal their species, age, or sex and perhaps even exchange navigation tips or information about stopover sites.



“We can’t be sure what they’re saying, but birds might broadcast calls during flight to signal their species, age, and sex. And we can certainly speculate that these flight calls could relate to navigation or finding suitable stopover habitat,” Van Doren said.



Earlier studies had documented instances of different species forming temporary partnerships during stopovers. However, this is the first evidence of vocal communication and possible social interactions between songbird species while in flight.



<h2 class="wp-block-heading" id="h-listening-to-the-night-sky">Listening to the night sky</h2>



Songbirds migrate primarily at night, making it difficult to observe their movements. To overcome this challenge, Van Doren and his team used acoustic recordings captured at 26 sites in eastern North America over three years. These recordings provided a rare glimpse into the nocturnal world of songbird migration.



“These nocturnal acoustic recordings are really the only window onto this unseen but absolutely massive flow of birds - hundreds of millions aloft over the U.S. on any given night during migration,” Van Doren explained. “It's something people aren’t usually aware of because it happens when we’re sleeping.”



Analyzing such a vast dataset would have been impractical without recent advancements in artificial intelligence.&nbsp;



Using <a href="https://www.earth.com/news/machine-learning-could-revolutionize-drug-discovery/" target="_blank" rel="noreferrer noopener">machine learning</a> tools, the researchers identified the flight calls of 27 bird species, including 25 well-sampled songbirds, allowing them to detect patterns of co-occurrence.



<h2 class="wp-block-heading" id="h-social-associations-in-the-sky">Social associations in the sky</h2>



The team measured how often flight calls from different species occurred within 15, 30, and 60-second intervals. Regardless of the time frame, they found that certain species called in tandem more often than chance would predict.



Further analysis revealed two key factors influencing these associations: wing length and call similarity.



Birds with similar <a href="https://www.earth.com/news/birds-with-short-stubby-wings-are-less-capable-of-relocating/" target="_blank" rel="noreferrer noopener">wing sizes</a> were more likely to associate, likely because similar wing lengths correspond to similar flight speeds, making it easier for them to travel together.



Species with comparable vocalizations also showed stronger associations, suggesting that shared calls may facilitate social connections during migration.



Interestingly, species that formed partnerships during stopovers did not maintain those relationships while in flight. Additionally, the birds were not necessarily flying with closely related species or those with similar habitat preferences.



“Species with similar wing sizes were more likely to associate, and wing length is directly linked to flight speed,” Van Doren said.&nbsp;



“As for vocalizations, it is possible that species’ calls have converged over time because of this social link or that species that happen to give similar calls are simply more likely to gravitate towards each other.”



<h2 class="wp-block-heading" id="h-expanding-our-understanding-of-songbird-migration">Expanding our understanding of songbird migration</h2>



While the study focused on 25 species, many other nocturnal migrants do not vocalize during flight, leaving much to uncover.&nbsp;



Van Doren’s team plans to extend their research by equipping individual birds with tiny microphones to track their in-flight “conversations” and interactions with travel companions.



These preliminary findings raise fascinating possibilities. For instance, short-lived species that cannot rely on parental guidance for migration may instead depend on social ties with other birds.&nbsp;



Conversely, the loss of biodiversity due to <a href="https://www.earth.com/news/bird-behavior-productivity-being-directly-impacted-by-climate-change/" target="_blank" rel="noreferrer noopener">climate change</a> and habitat destruction could disrupt these co-migratory relationships, further imperiling vulnerable species.



“This study really calls into question the long-held idea that songbirds migrate alone, solely following their own instincts,” Van Doren said.



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



The discovery of social interactions during migration has significant implications for bird conservation. If certain species rely on social cues or co-migration with specific partners, their survival may depend on maintaining these networks.&nbsp;



Losses in bird biodiversity could jeopardize these connections, making migration more difficult for some species.



Moreover, understanding the role of social information in migration could help researchers design better strategies to protect migratory birds, particularly as they face mounting risks from habitat loss, climate change, and light pollution.



“Learning more about the consequences of these social connections - not only for migration but also for other aspects of their biology - will be important to inform and manage the risks they face in a changing world,” Van Doren emphasized.



<h2 class="wp-block-heading" id="h-a-new-perspective-on-songbird-migration">A new perspective on songbird migration</h2>



This research challenges the traditional view of songbirds as solitary migrants guided solely by instinct and memory. Instead, it suggests that <a href="https://www.earth.com/news/bird-migration-is-influenced-by-social-relationships/" target="_blank" rel="noreferrer noopener">social interactions</a> and communication play a crucial role in their epic nocturnal journeys.&nbsp;



As scientists continue to explore these complex dynamics, they may uncover new strategies for safeguarding these remarkable travelers and the ecosystems they connect.



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Songbirds ‘talk’ to each other during migration

Every year, the night sky fills with the unseen movement of millions of migrating songbirds, tracing routes carved by evolutionary history.&nbsp; While these flight paths are largely guided by innate instincts, new research from the University of Illinois Urbana-Champaign suggests an unexpected social dimension to their nocturnal journeys.&nbsp; Evidence from over 18,300 hours of acoustic recordings reveals that songbirds may “talk” to other species as they migrate, potentially sharing information and forming temporary social bonds along the way. Migration may not be a solitary endeavor The study,...

A female zebra shark in Australia has confirmed what women everywhere have long suspected: men are overrated. She did this by getting pregnant all by herself.

To be clear, her most recent pregnancy was accomplished solo. Leonie the zebra shark had a male companion from 1999 to 2012, when he was moved to a different tank. During that time, the pair gave birth to a whopping two dozen babies.

After her mate was moved, Leonie didn’t let that deter her from joining the Mommy Club yet again. She surprised her caretakers by giving birth to three baby <a href="http://www.earth.com/news/kiribati-establishes-shark-sanctuary/">sharks</a> in 2016. 

How is this possible? <a href="http://www.uq.edu.au/">University of Brisbane</a> researcher Christine Dudgeon and her colleagues have cycled through a few theories.

At first, they thought perhaps the female zebra shark was able to turn her body into a sperm bank. This would allow her to use her ex’s sperm to fertilize her eggs at will. Upon further investigation, they found that the baby sharks were only carrying one set of DNA – that of their mother. Congratulations, Leonie’s ex: you are not the father!

This means that Leonie had her babies via asexual reproduction. This is quite common in many vertebrate species such as sharks, snakes, Komodo dragons, rays, and turkeys. Where Leonie has scientists baffled is that while asexual reproduction is typical for females who have never had a male partner, it’s virtually unheard of in females who have previously mated with males. 

Animals who move from sexual to asexual reproduction is a phenomenon that will require more study. Researchers like Dudgeon believe that it’s possible that this kind of switch occurs more often than scientists realize; they just didn’t know to look for it before.

--

By Dawn Henderson, Earth.com Staff Writer

Female zebra shark reproduces without a male

A female zebra shark in Australia has confirmed what women...

Performing animals were at the center of the success of the "greatest show on earth." The announcement from Ringling Bros. and Barnum &amp; Bailey Circus came as a surprise to some: after being active for more than a century, they are closing down their circus.

“Ringling Bros. ticket sales have been declining, but following the transition of the elephants off the road, we saw an even more dramatic drop. This, coupled with high operating costs, made the circus an unsustainable business for the company,” Chairman and CEO Kenneth Feld said in a statement posted on the <a href="https://www.ringling.com/">circus’ website</a>.

Circus lovers were saddened by the news, but it has some animal rights groups cheering.

“It’s a win for the animals,” Ed Stewart told the Sacramento Bee. Stewart co-founded the <a href="http://www.pawsweb.org/">Performing Animal Welfare Society</a> in 1984 with Pat Derby, who worked with captive animals in Hollywood.

Derby, who died of cancer in 2013, was inspired to work for animal rights after witnessing animal abuse on the sets of “Gunsmoke,” “Flipper,” and other shows, according to the PAWS website.

“PAWS applauds the decision by the Feld family to bring the curtain down on the Ringling Bros. and Barnum and Bailey Circus,” the nonprofit wrote on <a href="https://www.facebook.com/pawsweb.org/">Facebook</a>. “Public opinion has radically changed, favoring an end to the use of wild animals for entertainment, whether it’s elephants and tigers in circuses or orcas in marine parks.”

Over the years, PAWS and other animal rights groups – including the American Society for the Prevention of Cruelty to Animals and the Human Society of the United States – led protests and lawsuits targeting the circus.

“Ringling Bros. has changed a great deal over a century and a half, but not fast enough,” Wayne Pacelle, Humane Society president and CEO, said in a <a href="http://www.humanesociety.org/news/press_releases/2017/01/ringling-bros-show-ends-011417.html">statement</a>. “It’s just not acceptable any longer to cart wild animals from city to city and have them perform silly yet coercive stunts.”

In the late 1990s, activists with the Humane Society and other groups filed a lawsuit claiming that Ringling Bros. and other circuses used bullhooks and chains on their elephants, in addition to neglecting the animals.

In 2012, after 14 years, Ringling Bros. won a $16 million settlement in court over the allegations. Feld Entertainment, the circus’ parent company, <a href="http://www.postandcourier.com/news/animal-groups-agree-to-pay-nearly-m-to-ringling/article_6b737d7a-969c-5d81-97b6-32b79a6efbad.html">received the payment</a> in May 2014.

Despite their win in court, however, the company was feeling the pressure. In recent years, California and Rhode Island banned the use of bullhooks.

In October 2016, Feld Entertainment retired the Ringling Bros. elephants, a plan they’d first suggested at the beginning of the year. The elephants now live at the 200-acre <a href="https://www.ringlingelephantcenter.com/">Ringling Bros. Center for Elephant Conservation</a>.

While animal rights groups celebrate, others are saddened by the circus closing.

The elephants had been with the circus for more than 140 years, since the beginning.

But in recent years, the elephants – like SeaWorld’s performing orcas – have been at the center of a debate over working animals.

Abuse of performing animals shouldn’t happen, <a href="http://www.earth.com/news/animal-abuse-allegations-hollywood/">but it does</a>. When the abusers are caught, a scandal is sure to follow. After all, we bond to the animals that appear on our movie screens or in the shows we see live.

That’s the point – if we don’t feel a connection to performing animals, we’re not going to be emotionally invested in their performances.

That backfires on the culprits when abuse is uncovered – when we care about animals, we care if they’re being treated badly.

Working animals aren’t always mistreated, though. Some, in fact, enjoy their jobs. Trainers aren’t all villains, either.

Take <a href="http://circuscats.com/">The Acro-Cats</a>, for example. The cats perform amazing tricks for audiences around the U.S., but they’re felines on a mission. Their human staff use the act to raise awareness about two causes close to their hearts: pet adoption from shelters, and cat training.

If the circus cats aren’t in the mood to deal with performing for an audience, they don’t have to.

“Some days they perform, sometimes they don’t,” circus founder and cat trainer Samantha Martin said in the documentary “The Wonderful World of Cats.” “It’s free will. We open up the cage, and if they don’t come out, that means they don’t want to come out. We close the cage and move on to the next trick.”

Animals find fulfillment in other careers, too.

<a href="https://www.thedonkeysanctuary.org.uk/">The Donkey Sanctuary</a> matches up donkeys and children for animal therapy. The work is good for the children, but it’s good for the donkeys, too. They get some affection and attention from each child they help, and the sanctuary works to help donkeys, putting their welfare first.

Dogs around the world are employed in dozens of different jobs, and while some are mistreated – in the case of fighting dogs, horribly – many are thrilled for the chance to work with people.

Even circuses can be successful without exploiting animals.

<a href="https://www.cirquedusoleil.com/">Cirque du Soleil</a> is the obvious example. The Montreal-based circus has performed to sold-out shows around the world and is a permanent attraction in New York, Las Vegas, and other cities.

<a href="http://circusvargas.com/">Circus Vargas</a> once featured animal acts, but successfully retired them in 2010. They’ve made ending abuse a big part of their business model. Not just animal abuse, either – they also support the anti-child abuse organization Childhelp.

These groups show that it’s entirely possible to train working animals without abusing them and to have successful circuses without animals at all.

—

By Kyla Cathey / Earth.com staff writer

Circus closure prompts us to look at the history of performing animals

Performing animals were at the center of the success of...

Ever wonder how Leonardo DiCaprio’s character in The Revenant would have fared during that <a href="http://www.earth.com/news/ecological-traps-pose-big-risks-grizzly-bears/">grizzly bear</a> attack if he had been able to transform into a pack of wolves? Thanks to spectacular photographs from British vacationer Tom Littlejohns, you can almost picture it.

On a snow covered hilltop in the Rocky Mountains of Montana, a lone deer nibbles on the foliage of an evergreen. Deer are browsers, feeding primarily on young leaves and soft twigs.

The serenity of the scene swiftly gives way to violence as a pack three wolves ambush the deer, cornering her on a clearing near the edge of a cliff. She tries to run back into the thicket of the woods, but they have her surrounded. There is no escape.

Moments later, the three wolves feed greedily on the carcass of the deer. 

Thanks to expanding human populations, North American gray wolves had almost disappeared from the continental United States by the 1940s. However, a program based in central Idaho and Yellowstone Park proved successful in reintroducing the species to regions in northern Minnesota, northern Wisconsin, northern Oregon, Washington, Idaho, Michigan’s Upper Peninsula, and Montana.

One of them moves too close to the deer leg in another’s mouth on and a brawl ensues. Noise from the fight and the smell of the deer’s fresh blood attract the attention of a six and a half foot long grizzly bear.

The wolf not involved in the tussle turns and moves to pounce on the would-be plunderer. But she quickly discovers she is no match for the lumbering giant and runs off to hide the woods.  

The other two wolves move in to defend their food, but even at their most ferocious, the wolves cannot match the grizzly’s size and strength. The bear chases the wolves away and enjoys the fresh deer dinner.

All that is to say Leonardo’s character would have still lost.

<a href="http://www.earth.com/wp-content/uploads/2017/01/Screen-Shot-2017-01-16-at-3.12.40-PM.png"><img class="aligncenter size-medium wp-image-130388" src="http://www.earth.com/wp-content/uploads/2017/01/Screen-Shot-2017-01-16-at-3.12.40-PM-300x199.png" alt="screen-shot-2017-01-16-at-3-12-40-pm" width="300" height="199" /></a>

<a href="http://www.earth.com/wp-content/uploads/2017/01/Screen-Shot-2017-01-16-at-3.13.07-PM.png"><img class="aligncenter size-medium wp-image-130386" src="http://www.earth.com/wp-content/uploads/2017/01/Screen-Shot-2017-01-16-at-3.13.07-PM-300x184.png" alt="screen-shot-2017-01-16-at-3-13-07-pm" width="300" height="184" /></a>

<a href="http://www.earth.com/wp-content/uploads/2017/01/Screen-Shot-2017-01-16-at-3.13.19-PM.png"><img class="aligncenter size-medium wp-image-130385" src="http://www.earth.com/wp-content/uploads/2017/01/Screen-Shot-2017-01-16-at-3.13.19-PM-300x198.png" alt="screen-shot-2017-01-16-at-3-13-19-pm" width="300" height="198" /></a>

<a href="http://www.earth.com/wp-content/uploads/2017/01/Screen-Shot-2017-01-16-at-3.12.52-PM.png"><img class="aligncenter size-medium wp-image-130387" src="http://www.earth.com/wp-content/uploads/2017/01/Screen-Shot-2017-01-16-at-3.12.52-PM-300x219.png" alt="screen-shot-2017-01-16-at-3-12-52-pm" width="300" height="219" /></a>

<a href="http://www.earth.com/wp-content/uploads/2017/01/Screen-Shot-2017-01-16-at-3.13.41-PM.png"><img class="aligncenter size-medium wp-image-130384" src="http://www.earth.com/wp-content/uploads/2017/01/Screen-Shot-2017-01-16-at-3.13.41-PM-300x223.png" alt="Photos taken by a British vacationer capture wolves hunting down a deer, only to have their meal stolen by a hungry grizzly bear." width="300" height="223" /></a>

--

Photos: Tom Littlejohns

Written by Darryl Joseph, Earth.com Staff Writer

Grizzly bear caught stealing dinner from wolves

Ever wonder how Leonardo DiCaprio’s character in The Revenant would...

When you look at the tree of life, some species have lots of branches, while others have only a few, or most of the branches have broken off. What makes one group an evolutionary success, while other lines lose most of their branches?

Trying to find a pattern to survival is more difficult than it might appear at first. The kingdom Animalia has been divided up into 30 phyla, divisions based on certain traits.

That’s where things start getting complicated. The phylum Placozoa has only one species: Trichoplax adhaerens, a tiny, flat organism with no internal structures or even organs. The phylum Anthropoda contains multitudes – more than 80 percent of known animal species, including crabs, lobsters, insects, spiders, and more.

Dr. Tereza Jezkova and Dr. John Wiens, both of the <a href="http://www.arizona.edu/">University of Arizona</a>, set out to look for any patterns that might explain the stunning range of diversity in Anthropoda and other phyla, and the stunning lack of it in those like Placozoa.

The goal was to try and get an idea of why one phylum might be an evolutionary success while another seems to be barely hanging on.

To do this, they created a database to keep track of 18 different traits. The characteristics they tracked ranged from internal anatomical structures, to the type of habitat an animal can survive in, to how quickly a species reproduces.

Three traits were most connected to evolutionary success, the scientists discovered. The most successful phyla contain organisms that live on dry land, have a skeleton, and mooch off other organisms as parasites.

Other traits that might seem important to humans, such as having organs and a head, aren’t actually all that vital for species survival, it turns out.

One reason parasites are so successful is that other species tend to do the work of evolution for them, the scientists noted. If a species of gazelle has a dozen parasites, and two population evolve away from each other into separate species, the parasites evolve with them, they said. That leads to 24 parasite species instead of 12.

The research can help scientists understand which animal species are more fragile and which are better survivors.

For example, phyla that survive in the water, especially the oceans, tend to be less robust. They’re also disappearing rapidly due to pollution, ocean acidification, and other issues, Jezkova and Wiens said.

The scientists have published their research in the journal <a href="http://www.journals.uchicago.edu/toc/an/current">American Naturalist</a>.

Scientists wonder: what traits add to evolutionary success?

When you look at the tree of life, some species...

Want to make sure your pet pooch can keep up with your active lifestyle? The new Fitbark can help.

The health monitor is the <a href="http://www.earth.com/image/awww-looks-just-like-dog/">doggy</a> version of the popular Fitbit, the wearable tech that keeps humans on the move.

“We're on a mission to get dogs and humans healthy together,” the <a href="https://www.fitbark.com/explore/">website devoted to the device</a> proclaims.

Fitbark is a bone-shaped clip-on for canine collars. It connects to a smartphone app, where owners can fill out information about their dogs for a better reading.

Then, the new Fitbark goes to work, monitoring your dog’s activity – through miles traveled and calories burned – and sleep patterns. It works with any mobile device that can connect to Bluetooth devices, as long as they’re running either iOS 8, Android 5, or above.

FitBark can be used with any dogs, according to the device’s creators.

“FitBark is so tiny that it won’t bother dogs of any size, including 3-pound Chihuahuas and 200-pound Leonbergers,” they wrote on their website.

It can even be used with <a href="http://www.earth.com/news/non-profit-instagram-big-cats/">cats</a>, pigs, and other pets, but the app doesn’t provide baseline data for animals other than dogs, they said.

FitBark can also help to monitor some health conditions seen in dogs as they age, such as osteoarthritis.

The creators of FitBark are also using it to add to our understanding of dogs’ health. They’ve discovered some interesting trends in the data collected by dogs owners who have adopted the new FitBark tech.

For one, they learned that <a href="http://www.earth.com/news/deal-puppy-talk/">puppies</a> only spend about 11 to 13 hours a day sleeping. Human babies, on the other hand, sleep an average 16 to 20 hours a day.

They found that Maltese dogs are more restless during fireworks, while beagles and golden retrievers tend to be calmer. They even found that 6 p.m. is the most popular time for people to walk their dogs, and Swiss dogs are the most active.

—

By Kyla Cathey / Earth.com staff writer

New Fitbark promises to keep canines active

Want to make sure your pet pooch can keep up...

You may think you’ve been feeding puss perfectly with gourmet cat food twice a day – but scientists beg to differ and have outlined a new cat feeding schedule. The proper feeding schedule for your furry friend is actually closer to five bite-size meals a day, which more closely replicates how kitty dines in the wild.

Large meal sizes mean that our favorite pets are getting overweight and sluggish, and suffering from diseases like diabetes in their older years.

The new report suggests that:
<ul>
 	<li style="font-weight: 400;">Cats should be fed five times a day, which includes a night feed.</li>
 	<li style="font-weight: 400;">Dining on many small meals throughout the day stops cats from overeating.</li>
 	<li style="font-weight: 400;">Eating “little and often” replicates the way that cats naturally eat in the wild.</li>
</ul>
Chomping down on large-portioned meals means a cat overrides its inclination to stop eating when it feels full. As our feline companions are active after dark, scientists also suggest using timed feeders to assure cats get their energy after we go to bed. 

In addition to adopting the new cat feeding schedule the experts also suggested gamifying meal times to give the impression of a hunt. In the wild, cats can hunt for up to 12 hours a day. Without the stimulation of the hunt, cats become bored and frustrated, and engage in attention-seeking behaviours.

The scientists suggested creating “puzzle feeders” for the pets to help stimulate them mentally.

Puzzle feeders were the subject of a recent <a href="http://journals.sagepub.com/loi/jfm">Journal of Feline Medicine and Surgery</a> review. These nifty tools helped reduce feline stress, curbed weight loss, reduced aggressive behavior, and eliminated attention seeking. The same journal also advised to keep water bowls separate from food, as in the wild cats prefer to drink water far away from a food source. It is presumed that water near food is considered contaminated by the cats.

Feline behavior specialist Sarah Ellis said: “The way we feed our cats generally does not match the lifestyle they were designed for. Cats have undergone little in the way of selective breeding during the domestication process and therefore have an instinctive need to hunt. This modern lifestyle could be dangerous to pets, but by making a few simple changes to the way we feed them, we can help our cats to live longer, healthier and happier lives. The plan, based on scientific evidence, helps every cat owner mimic the conditions cats would usually contend with to get their food.”

This research and the subsequent cat feed plan was authored by Dr. Sarah Ellis and Dr. Lizzie Rowe for the charity <a href="http://www.icatcare.org/">International Cat Care</a>. You can read all their excellent tips for taking care of your nearest and dearest furry friend on their website. Follow this new cat feeding schedule and see your pussy prosper!

By Frances Levine/ Earth.com Editor-in-Chief

What's new pussycat? Science suggests new cat feeding schedule

You may think you’ve been feeding puss perfectly with gourmet...

The Asian shot hole borer has a name longer than it is. This tiny bug has a big appetite, though, and a new favorite food: avocado trees.

The little beetles are native to southeast Asia, but traveled to Los Angeles in 2003. More than a dozen years later, they’re expanding into other areas of Southern California.

Among those areas are the avocado tree orchards of Ventura County.

“Shot hole borers will bore into almost everything, including avocado trees, which is why they are getting a lot of attention,” graduate student Shelley Bennett said in a <a href="http://www.news.ucsb.edu/2017/017516/holy-guacamole">press release</a>. “But these beetles also affect many native tree species.”

Bennett works in the <a href="http://rivrlab.msi.ucsb.edu/">Riparian InVasion Research Laboratory</a> at the University of California, Santa Barbara. The lab studies invasive insect species, among other topics. One team has been tracking Asian shot hole borers in California.

The two species of shot hole borer seen in the state are tiny – usually less than a tenth of an inch. They have a big appetite, though.

Worse, both species of beetle carry a pathogenic fungus that causes a disease called Fusarium dieback.

For the beetles, the fungus is vital. It’s carried by pregnant females, who plant it beneath a tree’s bark before laying their eggs. The eggs hatch into larvae, which eat the fungus as they grow to adulthood.

Once they’re adults, each females collects some fungus of her own before heading out into the world.

But for trees that are susceptible to Fusarium dieback, the fungus that causes it is devastating. The disease affects the vascular systems of more than 130 tree species, cutting off the flow of nutrients that keep them alive.

Aside from the avocado trees, the beetle has been spotted in oak and sycamore trees in Santa Barbara County, and along the Santa Clara River which runs through parts of Southern California.

The spread of the invasive insects could lay waste to Southern California’s avocado groves, valued at more than $400 million.

Worse, they could cause damage to the state’s riparian habitats – natural areas along rivers that offer habitat for native animal and plant species.

The <a href="http://www.ucsb.edu/">UC Santa Barbara</a> researchers are working with scientists from the <a href="http://ucanr.edu/">UC Cooperative Extension</a>, the <a href="https://www.cdfa.ca.gov/">California Department of Food and Agriculture</a>, and other agencies to come up with a solution.

—

By Kyla Cathey / Earth.com staff writer

Tiny shot hole borers want our guacamole!

The Asian shot hole borer has a name longer than...

Chimps enjoy their casual flings, but when it’s time to settle down, they don’t want just any mate. Opposites attract, scientists said.

Researchers at <a href="http://www.tanzaniaparks.go.tz/index.php?option=com_content&amp;view=article&amp;id=28&amp;Itemid=186">Gombe National Park</a> in Tanzania have found that when it comes time to have babies, chimps want a mate who is as genetically different from themselves as possible.

The researchers ran DNA tests of feces from 150 chimpanzees to see how similar each male-female pair was. Not that similar, they found out.

While most wild animals appear to avoid breeding with close relatives, chimps take it a step farther.

They avoid not only their siblings and close cousins, but also strangers who are genetically similar, the researchers said.

The scientists aren’t sure yet how the chimps can tell. They think the primates may base their choices on appearance, smell, and the sounds they make, and how different they are from each other.

“Our results suggest that, as expected for a slowly reproducing species in which females invest heavily in each offspring and sometimes reside with close relatives, several mechanisms promote inbreeding avoidance and mate choice in chimpanzees,” they wrote in their study.

In other words, it’s quite literally a case of opposites attract.

The drive behind their choices may be a phenomenon called “inbreeding depression,” the scientists said.

In the rare cases where a chimpanzee does mate with a parent, sibling, or other close relative, the babies are less likely to survive to adulthood, the scientists said. That’s because inbreeding can allow recessive genes to be expressed, leading to health problems.

“Inbreeding can adversely affect fitness through numerous pathways, notably via early death or reproductive disadvantage,” the scientists wrote.

Usually, this is avoided by female chimps moving out of their family group once they reach their teen years.

But even among a new group of chimps she hasn’t met before, a female chimp is more likely to choose a genetically different mate, the scientists said. When tested, female chimpanzees who had migrated to a new group often had more genetic differences with their chosen mate than with other males in the group, they said.

The study was published in the journal <a href="http://rsos.royalsocietypublishing.org/content/4/1/160422">Royal Society Open Science</a>.

—

By Kyla Cathey / Earth.com staff writer

When chimps want to start a family, opposites attract

Chimps enjoy their casual flings, but when it’s time to...

Usually it’s safe to talk about your career at the dinner table. If you’re a researcher in the field of fart science, though, maybe save it for after dessert.

Dr. David Steen of <a href="http://www.auburn.edu/">Auburn University</a> and a number of other scientists are investigating the subject of which animals pass gas.

The project was inspired by a <a href="https://twitter.com/DaniRabaiotti/status/818208792269717510">tweet</a> from Dani Rabaiotti, a <a href="http://www.ucl.ac.uk/">University College London</a> researcher and doctoral student. It was directed at Steen’s Twitter account: “[A] family member asked me the other day if snakes fart and [I] did not know the answer to their question. So do they?”

The question sparked a hashtag: <a href="https://twitter.com/hashtag/doesitfart">#DoesItFart</a>.

It also led the science side of Twitter to live up to its reputation. Doctoral student Nick Caruso created a <a href="https://docs.google.com/spreadsheets/d/19gMMn4Wmw3BNLWMojEy7kgrjnjVB2JlMSwd1s-nYyUc/edit?usp=sharing">spreadsheet</a> with Steed and Rabaiotti titled “Does it fart?” The spreadsheet lists dozens of animal species, whether or not they pass gas, and research to support the claim.

The foray into fart science expanded, as a “Does it puke?” tab was added to the spreadsheet.

Most of the “research notes” are tongue in cheek. For example, among the farters:
<ul>
 	<li>Snow leopards: “Their floofy bottoms help to muffle the sound.”</li>
 	<li>African wild dogs: “Any self-respecting canine does.”</li>
 	<li>Burmese pythons: “Often silent but deadly. Thick, and … meaty? If it were a color it would be brownish-yellow.”</li>
</ul>
Dogs do fart, but are more often blamed for human farts than their own. Birds don’t fart, but could if they wanted to. Mastodons don’t fart – anymore.

Science Twitter was quick to jump aboard.

“For the record, spotted #hyenas fart, burp and puke. A real treat to work with them!” <a href="https://hyena-project.com/">The Hyena Project</a> tweeted out on the organization’s account.

Geologists pointed out that volcanoes fart, and it’s extremely dangerous. Even astronomers got in on the fart science game, describing the gas-passing habits of black holes, moons, and comets.

As the hashtag caught on, Rabaiotti was quick to pin a caveat to her account: “To my new followers: I [don’t] normally tweet about farts.”

She has, however, posted a few contenders for <a href="https://twitter.com/hashtag/bestcarcass">#BestCarcass</a>.

— 

By Kyla Cathey / Earth.com staff writer

Researchers dive into the wind-breaking field of fart science

Usually it’s safe to talk about your career at the...

It sounds like a science fiction plot. Using lasers, scientists brainwash an unwitting subject to stalk and kill its prey. But for these hapless zombie killer mice, it’s all too real.

A team of scientists from <a href="http://www.yale.edu/">Yale University</a> and the <a href="http://www5.usp.br/english/?lang=en">University of São Paulo</a> have been studying which parts of the brain control hunting behavior in vertebrates. Their goal was to figure out if the amygdala played a role in hunting behaviors.

To test their theory, they created aggressive zombie mice with a virus and some lasers.

They injected each mouse’s brain with a light-sensitive virus. Then, they watched until the virus spread that light-sensitivity to the amygdala. Using a thin optic fiber and a blue laser, they were able to turn hunting-focused neurons on and off at will.

This turned the mice into hunting machines.

Using the laser, the scientists could “program” the mouse to chase down prey like grasshoppers and to attack. In other words, they could turn timid mice that were normally the targets of predators into bold hunters themselves, the researchers said.

When the laser was turned off, the mice behaved normally. When it was turned on, they ran around looking for targets, attacking everything from grasshoppers to bottle caps.

However, the scientists’ brain control was not complete. Unlike fictional human zombies, the zombie mice did not attack or eat their own kind. They also were much less aggressive if they weren’t hungry, the scientists said.

That speaks to hunting behaviors being food-driven and not violence-focused, at least in mice.

The researchers also found that if they created lesions on the neurons in the amygdala associated with the biting and killing reflexes, mice would still chase their prey, but they would not kill it.

The research is still in its infancy, but isolating the neurons that control hunting and food-driven behaviors in mice could offer clues to how hunting behaviors evolved in other mammals. It could even offer clues into why some humans struggle with overeating, the researchers said.

However, that would require a lot more study, they said.

The study was published in the journal <a href="http://www.cell.com/cell/abstract/S0092-8674(16)31743-3">Cell</a>. 

By Kyla Cathey / Earth.com staff writer

Image credit: Ivan de Araujo

Scientists create food-driven killer mice

It sounds like a science fiction plot. Using lasers, scientists...

Everyone can relax. We finally know where the Hyolith sea creature belongs on the tree of life.  
The first fossil of the ocean floor dwelling creature was discovered 175 years ago.  The mysterious animal, with its cone-shaped shell, tentacles, and appendages for walking, has eluded scientific classification until now.
Scientists say the Hyolith belongs to an invertebrate group that includes the horseshoe worm.
“Hyoliths are small cone-shaped sea dwelling animals. They are known from all around the world, mostly from fossils of their shells, “ Joseph Moysiuk of<a href="https://www.utoronto.ca/"> University of Toronto</a> told<a href="http://www.bbc.com/news"> BBC News</a>.
Moysiuk analyzed more than 1,500 specimens excavated from rocks found in Canada and the U.S. to reach this conclusion about the animal’s classification.
“They appear in the fossil record about 530 million years ago and survived until about 250 million years ago.”
“But the question of where Hyoliths actually fit into the tree of life has been somewhat of a mystery for the last 175 years, since they were first described.”
Hyoliths had long been assumed to be related to today’s common mollusks – like squid, octopus, clams, and snails. However, the new research published in the journal <a href="http://www.nature.com/nature/index.html">Nature</a> suggests that they are more closely related to another group of organisms known as lophophorata, which also include lamp shells (brachipods).
Researchers involved in the study analyzed soft tissue preserved in fossils from a site called Burgess Shale in Canada.
“Being able to place them on the tree of life, it solves this long paleontological mystery about what these creatures are,” said Moysiuk.
He adds, “We have been able to discover some new features of a very old group of fossil animals, and it’s allowed us to reveal the evolutionary history of this group of animals and where exactly they sit on the tree of life.”
Dr. Martin Smith of the <a href="https://www.dur.ac.uk/">University of Durham, UK</a>, also analyzed the fossils. He believes that understanding how the ancient creatures lived can offer insight into the impact of mass extinction events.
The Hyolith, which lived during the Cambrian period nearly 540 million years ago, was wiped out (along with most animal life) during the Permian-Triassic mass extinction, 252 million years ago.
“Understanding the effects of such mass extinctions on ecology and diversity is particularly important as we seek to appraise and mitigate the implications of the current mass extinction event brought about by human activity,” said Dr. Smith.

Ancient Hyolith sea creature joins the tree of life

Everyone can relax. We finally know where the Hyolith sea...

While fossils can help shed light on the physicality of ancient humans, it is a much trickier task to figure out what our ancestors may have sounded like. But according to a new study by a collaborative team of researchers, the sounds of baboons may offer clues about the origins of ancient human speech.

The team of scientists from six different academic institutions, led by Dr. Louis-Jean Boe of <a href="http://www.univ-grenoble-alpes.fr/en/main-missions/international/international-2060.kjsp">Grenoble Alpes University</a>, published their findings in the journal <a href="http://journals.plos.org/plosone/">Plos One</a>. According to their research, the mating calls and grunts of Guinea baboons contain distinct, human-like vowel sounds.

Previous theories suggested that ancient human speech developed only after our humans developed a low larynx. But the new research suggests that the human vocal system evolved from abilities already present in our primate ancestors like the Guinea baboon.  

The researchers studied the acoustics of 1,335 baboon sounds and the physicality of their tongues. They found that baboon tongues and human tongues both shared the ability to make vowel sounds.

"Language is a key difference between humans and the rest of the natural world, but the origin of our speech remains one of the greatest mysteries of science," said the team. 

"The evidence developed in this study does not support the hypothesis of the recent, sudden, and simultaneous appearance of language and speech in modern Homo sapiens. It suggests that spoken languages evolved from ancient articulatory skills already present in our last common ancestor ... about 25 million years ago." 

Last year, a similar study involving monkeys identified five different vowel sounds, indicating a possible link to the origin of ancient human speech.  

Professor Scott Moisik from the <a href="http://www.mpi.nl/">Max Planck Institute for Psycholinguistics</a> told the <a href="https://www.apnews.com/658e37e1f9da45dcab1955c2685fe066/Scientists-hear-voice-of-ancient-humans-in-baboon-calls">AP</a> that these new findings fit with previous research, as well as his own experience listening to primates.  

"When I hear a cat on YouTube produce a vocalization that very much sounds like 'oh long Johnson,' or the 'no no no' cat, or a dog that gets pretty-darned close in imitating 'I love you' ... I am led to believe that, to use the words of Boe and company, 'speech precursors' (however rudimentary or limited) go back further than 25 million years ago," he said.

--

By Rory Arnold / Earth.com staff writer

Baboon mating calls hold clues about ancient human speech

While fossils can help shed light on the physicality of...

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



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



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



Video/ Image Credit: ESA



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

Nushagak Bay in southwest Alaska

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



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



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



Video/ Image Credit: American Chemical Society&nbsp;



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



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

Flu viruses are more flexible than expected

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



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



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



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



Video/Image Credit: ESA&nbsp;



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

Lake Trasimeno in Central Italy

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



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



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



Video Credit: American Chemical Society&nbsp;



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



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

Detecting mercury contamination with the tap of a finger

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

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



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



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



Video Credit: ACS Reactions



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



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

How does salt makes things taste better?

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

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



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



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



Video/ Image Credit: ESA



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



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

Santiago, Chile in South America

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

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



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



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



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



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



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



Video Credit: Johns Hopkins&nbsp;



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



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

Interactive map of the universe includes 200,000 galaxies

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



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



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



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



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



Video Credit: ESA&nbsp;&nbsp;



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



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

Lesotho: Africa's "Kingdom in the Sky"

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



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



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



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



Video Credit: ESA&nbsp;



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



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

The city of Dublin on Ireland's east coast

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



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



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



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



Video/ Image Credit: ESA



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



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

The province of Zaragoza in northeast Spain

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



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



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



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



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



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



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



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



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



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



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The rapid retreat of the Columbia Glacier

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



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



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



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



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



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



Video &amp; Image Credit: ESA



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



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

The Pyrenees Mountains in southwest Europe

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



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



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



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



Video Credit: NASA Goddard



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



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



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

Two distant planets may be "water worlds"

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

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



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



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



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



Video Credit: NASA Goddard&nbsp;



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



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

Satellites reveal how Earth's systems are interconnected

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



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



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



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



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



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



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



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

Tiger sharks are shifting poleward as temperatures rise

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

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



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



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



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



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



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



Video Credit: ESA&nbsp;



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



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

Melt ponds on the Greenland Ice Sheet

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



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



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



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



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



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



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



Video Credit: ESA



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



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

The history of Mars is much more complex than we thought

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



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



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



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



Video Credit: Stowers Institute for Medical Research



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



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

Cavefish are healthy despite their sedentary lifestyle

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



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



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



Video Credit: NASA Earth Observatory&nbsp;



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



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

Satellites capture the world's biggest and fastest waves

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



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



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



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



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



Video Credit: European Space Agency&nbsp;



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

Satellites have become essential to our survival

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