On September 29, 2024, something unusual happened in our cosmic neighborhood. Earth captured a tiny asteroid named 2024 PT5, turning it into a temporary mini-moon. 



That's right... as of today, November 2, 2024, <a href="https://www.earth.com/news/its-official-earth-now-has-two-moons-captured-asteroid-2024-pt5/" target="_blank" rel="noreferrer noopener">Earth has two moons</a>.



Richard Binzel, an astronomer at the Massachusetts Institute of Technology (<a href="https://www.mit.edu" target="_blank" rel="noreferrer noopener">MIT</a>), shed some light on these fleeting celestial companions.



"These happen more often than we think, but they're small and tough to spot," Binzel explained. "Only lately have our telescopes become powerful enough to catch them regularly."



Back in August, a team of astronomers from the <a href="https://www.ucm.es/english" target="_blank" rel="noreferrer noopener">Complutense University</a> of Madrid detected the small space rock using a powerful telescope in Sutherland, South Africa.



They weren't the only ones keeping an eye on it. The asteroid was first noticed on August 7, 2024 by NASA's Asteroid Terrestrial-impact Last Alert System (<a href="https://atlas.fallingstar.com/" target="_blank" rel="noreferrer noopener">ATLAS</a>) at Haleakala Observatory in Hawaii.



This discovery sparked excitement among astronomers, offering a chance to learn more about <a href="https://www.earth.com/news/nasa-test-simulation-shows-earth-not-prepared-prevent-large-asteroid-strike/" target="_blank" rel="noreferrer noopener">near-Earth objects</a>.



<h2 class="wp-block-heading" id="h-what-exactly-is-2024-pt5">What exactly is 2024 PT5?</h2>



Earth occasionally captures small asteroids like 2024 PT5, placing them into temporary orbits around our planet. 



While most asteroids circle the sun on their regular paths, some venture close enough for <a href="https://www.earth.com/news/earth-global-electric-field-discovered-equally-important-gravity-magnetic-fields/" target="_blank" rel="noreferrer noopener">Earth's gravity</a> to snatch them up for a brief visit.



These cosmic visitors only stay in Earth's orbit for a short time -- typically a few weeks or months -- before breaking free and resuming their solar journey.



Each mini-moon gives scientists a rare opportunity to examine <a href="https://www.earth.com/news/27500-hidden-near-earth-asteroids-discovered-using-google-cloud/" target="_blank" rel="noreferrer noopener">near-Earth asteroids</a> up close, revealing valuable insights about our solar system's mechanics.



So, what makes this asteroid special, aside from the fact that new technology and the internet made it famous? 



William Blackmore, Planetarium Director and Astronomy Instructor at <a href="https://www.mhcc.edu/" target="_blank" rel="noreferrer noopener">Mt. Hood Community College</a>, offered his thoughts.



"All mini-moons are unique in their own way," Blackmore explained. "This one isn't different from others except that it's the most recent.”



2024 PT5 will be around for about two more weeks, probably until mid-November.



<h2 class="wp-block-heading" id="h-comparing-2024-pt5-to-our-moon">Comparing 2024 PT5 to our moon</h2>



Let's compare our moon to this new mini-moon: 2024 PT5 is only about 37 feet across, while our familiar moon stretches a massive 2,159 miles in diameter. That makes <a href="https://www.earth.com/news/how-did-earth-get-its-moon-a-new-theory-has-emerged/" target="_blank" rel="noreferrer noopener">our moon</a> over 300,000 times wider than this tiny asteroid.



Knowing it’s up there is pretty exciting, even though we can't see it for ourselves without an invitation to a huge Earth telescope installation.



“These temporary captures are natural cosmic laboratories,” Binzel mentioned. “They help us understand the small bodies that come close to Earth and could be important for future space missions.”



<h2 class="wp-block-heading" id="h-how-asteroid-2024-pt5-became-famous">How Asteroid 2024 PT5 became famous</h2>



Understanding how 2024 PT5 became Earth's temporary moon involves a bit of <a href="https://www.earth.com/news/finding-order-in-the-chaos-of-the-three-body-problem/" target="_blank" rel="noreferrer noopener">orbital mechanics</a>. 



Blackmore explained, "It's moving along with us in our orbit around the sun. It's part of a group of asteroids called the Arjuna asteroids, which move at about the same pace as Earth."



He added an interesting analogy: "Imagine a skateboarder dropping into a skate park. They ride the curves, adding energy as they go. That's like the asteroid getting caught in <a href="https://www.earth.com/news/dart-mission-debris-will-create-a-human-made-meteor-shower/" target="_blank" rel="noreferrer noopener">Earth's gravitational field</a>, riding the curve before moving on."



<h2 class="wp-block-heading" id="h-significance-of-spotting-mini-moons">Significance of spotting mini-moons</h2>



Spotting mini-moons is tough because they're incredibly small and faint. These tiny asteroids are often just a few dozen feet across, which means they don't reflect much sunlight. That makes them nearly invisible against the dark backdrop of space.



Plus, they're zipping around at high speeds and don't hang around for long, so by the time we point our telescopes their way, they might already be gone. 



It's like trying to catch a glimpse of a firefly from miles away -- you need the right conditions and equipment.



<h2 class="wp-block-heading" id="h-modern-high-tech-telescopes">Modern high-tech telescopes</h2>



Astronomers find them by using powerful telescopes equipped with <a href="https://www.earth.com/news/gaia-reveals-moons-around-hundreds-of-asteroids/" target="_blank" rel="noreferrer noopener">sensitive detectors and smart software</a>.



Projects like the ATLAS system scan the skies every night, searching for any objects that weren't there before. 



When they spot something moving in a way that suggests it's close to Earth, they alert other astronomers to help confirm the find. 



It's a collaborative effort, combining technology and teamwork to spot these elusive cosmic visitors.



Knowing more about these temporary moons helps us prepare for any potential asteroid threats and opens up possibilities for mining resources from near-Earth objects.



<h2 class="wp-block-heading" id="h-challenges-in-observing-2024-pt5">Challenges in observing 2024 PT5</h2>



For those eager to see this mini-moon, both experts warned that it would be extremely difficult. "You'd need a telescope with a diameter of at least 30 inches," Blackmore mentioned. "That's beyond what most amateur astronomers have."



Todd agreed, adding, "It won't be visible to the naked eye. Being 33 feet wide and so far away, you'd need a very large telescope."



<h2 class="wp-block-heading" id="h-why-does-any-of-this-matter">Why does any of this matter?</h2>



While 2024 PT5 doesn't pose any threat to Earth, <a href="https://www.earth.com/news/is-there-a-fifth-force-of-nature-asteroids-provide-new-clues/" target="_blank" rel="noreferrer noopener">studying it is crucial</a>. 



"It's important to analyze how it moves and interacts with Earth's gravitational pull," Blackmore said. "This helps us refine our techniques for tracking objects that could cross our path again."



Todd highlighted the practical applications of this knowledge. 



"We need to understand how to intercept an asteroid at a distance and change its direction," he said. "This could be vital in <a href="https://www.earth.com/news/nasa-dart-mission-proves-humanity-can-be-saved-from-asteroid-collision/" target="_blank" rel="noreferrer noopener">preventing potential impacts</a> in the future."



<h2 class="wp-block-heading" id="h-inspiration-for-future-space-missions">Inspiration for future space missions</h2>



Blackmore envisioned future missions that could take advantage of these temporary visitors. 



"It would be fascinating if we had missions ready to send small satellites or probes to these objects when they come close," he mused. "Imagine building a network of sensors or cameras traveling along with us, like space webcams."



Todd also saw <a href="https://www.earth.com/news/asteroid-named-psyche-is-worth-10000-quadrillion-for-whoever-can-extract-minerals/" target="_blank" rel="noreferrer noopener">potential in asteroid mining</a> and scientific discovery. 



"There might be materials on these asteroids that we can't find on Earth," he said. "They could solve problems in medicine or technology. But we need to weigh the benefits carefully."



To sum it all up, the brief visit of asteroid 2024 PT5 serves as a reminder of the dynamic <a href="https://www.earth.com/news/building-blocks-of-life-found-in-asteroids-were-formed-in-cold-regions-of-space/" target="_blank" rel="noreferrer noopener">nature of our solar system</a>. 



While it won't be with us for long -- just a couple more weeks -- its presence offers valuable opportunities for learning and exploration.



As technology advances, we'll likely spot more of these mini-moons. Each one gives us a chance to understand our cosmic environment better and prepare for the future. 



So even though you'll never see it, you might want to spare a moment of your time and stop to appreciate 2024 PT5 while you still can.



The full study was published in the&nbsp;<a href="https://iopscience.iop.org/article/10.3847/2515-5172/ad781f" target="_blank" rel="noreferrer noopener">journal IOPscience</a>.



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Earth's second moon, a mini-moon, will drift away in a few days and never return

On September 29, 2024, something unusual happened in our cosmic neighborhood. Earth captured a tiny asteroid named 2024 PT5, turning it into a temporary mini-moon. That's right... as of today, November 2, 2024, Earth has two moons. Richard Binzel, an astronomer at the Massachusetts Institute of Technology (MIT), shed some light on these fleeting celestial companions. "These happen more often than we think, but they're small and tough to spot," Binzel explained. "Only lately have our telescopes become powerful enough to catch them regularly." Back in August,...

Politics has for years obfuscated the debate over climate change, with deniers claiming time and time again that any increase in carbon dioxide content or <a href="https://www.earth.com/news/rising-temperatures-alter-photosynthesis-and-plant-growth/">temperature</a> is due simple natural changes and variations. A new study from scientists at <a href="https://www.princeton.edu/">Princeton University</a> can put that claim to rest. The experts report that there is a less than a one percent probability that Earth's energy imbalance has occurred naturally. 

Satellite data has consistently shown that the Earth is undergoing a warming trend. The authors state in the new paper that the satellite record provides clear evidence of a human-influenced climate system. 

"Knowing that human activity is responsible for the acceleration of planetary heat uptake implies the need for significant policy and societal action to reduce anthropogenic greenhouse gas emissions to curb further increases in Earth’s energy imbalance.”

The energy imbalance the authors are referring to essentially means we are retaining more of the sun’s radiation then we are putting out. While the normal greenhouse effect plays a significant role, the retention of more infrared heat from the sun is also influenced by other factors. 

“We always think, ‘Increasing greenhouse gases means trapping more infrared heat’ - the classic greenhouse effect becomes larger. This is correct, but the flip side is that the resulting warmer planet now also radiates more infrared heat away to space, so the greenhouse gas heating impact is canceled," explained study lead author Shiv Priyam Raghuraman.

"Instead, much of the imbalance increase comes from the fact that we are receiving the same amount of sunlight but reflecting back less, because increased greenhouse gases cause cloud cover changes, less aerosols in the air to reflect sunlight - that is, cleaner air over the U.S. and Europe - and sea-ice decreases.”

The only explanation is “anthropogenic forcing” - humans adding more energy into the Earth’s natural systems. “Our study shows that even with the given observational record, it is almost impossible to have such a large increase in the imbalance just by Earth doing its own oscillations and variations.” 

While science is an ever-ongoing process that operates on falsification, this is yet another nail in the denialists coffin. 

“It is exceptionally unlikely - less than 1% probability - that this trend can be explained by natural variations in the climate system,” said Raghuraman.

The study is published in the journal <a href="https://www.nature.com/ncomms/">Nature Communications</a>.

---

By <a href="http://rugerpaleo@gmail.com">Alex Ruger</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Less than 1% chance that Earth's energy imbalance has occurred naturally

Politics has for years obfuscated the debate over climate change,...

Predicting the weather is an unenviable task - meteorologists often feel the brunt of the public’s disdain when a forecast just isn’t quite right - snow when it should be sunny, or dry when they’re hunkered down for a <a href="https://www.earth.com/news/climate-variability-is-driving-more-intense-thunderstorms/">thunderstorm</a>. 

The weatherman may need to watch out, because a new study suggests that he may become obsolete, set to be replaced with forecasting by machine learning and artificial intelligence. 

Study first author Lei Han, a professor at <a href="http://eweb.ouc.edu.cn/">Ocean University of China</a>, stresses the importance of his team’s work. 

“Accurate weather forecasting is critical in protecting socioeconomic conditions in many areas such as transportation, agriculture and water resources management,” said Professor Han.

Traditionally, meteorologists have used a narrow band of data, known as numerical weather prediction (NWP), that relies on various measurements of humidity, air pressure and observations. Without being informed by an understanding of atmospheric dynamics and physics, these models are prone to under or over-forecasting. 

The researchers have created a new forecasting method based on inspiration from medical imaging software called U-net. This new software, CU-net (or correction U-Net), is getting progressively better at predicting weather patterns. 

Rather than using purely localized data to predict the weather of a single locale, CU-net takes data from adjacent blocks and layers them on top of each other. The artificial intelligence then gets to work predicting what weather patterns may occur at the location, refining the variables of temperature, humidity, wind-speed, and wind direction to come up with what the researchers believe is a more accurate forecast. 

“The confidence gained from this research can directly lead to innovative diagnostics for weather and climate variability, as we have never been able to imagine before the era of AI," explained study co-author Haonan Chen from the University of Colorado.

These advances in technology allow meteorologists to make large-scale predictions about weather patterns. According to Dr. Chen, artificial intelligence will be a game changer in Earth system research.

The study is published in the journal <a href="https://www.springer.com/journal/376">Advances in Atmospheric Sciences</a>.

---

By <a href="http://rugerpaleo@gmail.com">Alex Ruger</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Artificial intelligence will be a game changer in weather forecasting

Predicting the weather is an unenviable task - meteorologists often...

At the end of the Cretaceous Period, <a href="https://www.earth.com/news/dinosaurs-were-already-in-trouble-before-extinction/">dinosaurs</a> (besides birds) and many large marine reptiles suffered a cataclysmic end. Everyone knows about this mass extinction event, yet few consider the survivors of it. A new study has analyzed shark diversity before and after the mass die off. 

Sharks are ancient creatures, and the oldest known form of vertebrate on the planet. Fossil records suggest that at one point in history, there were more than 3,000 types of sharks and their relatives. Sharks managed to survive during extinction events when the ocean lost its oxygen - including the die off during the Cretaceous period, when many other large species were wiped out. 

Researchers from <a href="https://www.uu.se/en">Uppsala University</a> led by Mohamad Bazzi looked closely at the easiest shark remains to find - teeth. Examining the diversity of 1,239 fossil shark teeth, the team found that shark diversity had been declining before the extinction event. 

The extinction, roughly 66 million years ago, happened at the boundary of the Cretaceous and Paleogene, the so-called K-Pg boundary. Even though shark diversity was diminished before the extinction, it stayed steady over the course of the event itself. 

There were some exceptions to the overall rule - apex predator sharks with large triangular shaped teeth, did suffer some loss of species during the extinction. Possibly these extinctions were related to the extinction of prey species. 

Other sharks, such as those from the family Odontaspididae, flourished after the K-Pg boundary and rapidly diversified. This family of sharks evolved narrow teeth for preying on fish.

The scientists speculate that the selective extinction in sharks may indicate an overall change in diet from more specialized predators to one of fish generalists. Ultimately, sharks proved to be more resilient in the face of extinction than most vertebrate groups.           

The research is published in the journal <a href="https://journals.plos.org/plosbiology/">PLOS Biology</a>.

Shark diversity survived the dinosaur extinction

At the end of the Cretaceous Period, dinosaurs (besides birds)...

We are among the only primates on the planet that can actually tread <a href="https://www.earth.com/news/new-technology-needed-to-monitor-earths-water-cycle/">water</a>. Swimming is a full body activity that exercises all of our major muscle groups - including the brain, according to a new study.

The research, conducted by scientists at the <a href="https://www.udel.edu/">University of Delaware</a>, looked at students from the ages of 6 to 12. The experts set out to investigate the connection between exercise and the retention of vocabulary words. 

The students were taught new vocabulary words and were then separated into three groups; one for swimming (an aerobic activity), one to take part in a Crossfit-like routine (an anaerobic activity), and the other to participate in a coloring sheet (a control group). 

Lead researcher Maddy Pruit explained that motor movement helps the brain encode new words. While this benefit has been noted in adults, the current study is the first of its kind to examine the effect of exercise on learning ability among children.

As it turns out, the swimmers retained 13 percent more of their vocabulary words compared to their peers in the other two groups. Pruitt attributes this to the automatic, full-body nature of swimming. The other exercise group had to learn the movements of their routine, yet swimming comes much more naturally to us. 

"We were so excited about this study because it applies to clinicians, caregivers and educators who can put it into practice. It’s simple stuff, nothing out of the ordinary. But it could really help boost the outcomes," said study co-author Giovanni Morini.

Pruitt herself has taken these lessons to heart. Having earned her masters degree in 2020, she now works as a speech pathologist for elementary students. 2020. 

“My sessions are very rarely at a table,” she said. “I’ll take my kids out to the playground or we’ll take a walk around the school.” 

The study is published in the <a href="https://pubs.asha.org/journal/jslhr">Journal of Speech Language and Hearing Research</a>.

---

By <a href="http://rugerpaleo@gmail.com">Alex Ruger</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Swimming exercises the brain

We are among the only primates on the planet that...

The effects of the climate crisis have become more widespread and severe much sooner than expected, and <a href="https://www.earth.com/news/what-cats-can-teach-us-about-human-genetic-diseases/">human</a> activities are "unequivocally" to blame, according to the latest report from the <a href="https://www.ipcc.ch/">IPCC</a>. The assessment represents the most comprehensive study to date from the UN climate panel.

The research suggests that recent warming is not only unprecedented over the past two thousand years - but possibly over the past hundred thousand years. 

The researchers say that weather extremes which were once considered rare, or even unprecedented, have become common. Furthermore, we are now permanently locked into major impacts of the climate crisis, regardless of whether future global warming is limited to 1.5 degrees Celsius.

The heat wave that killed hundreds of people and more than a billion animals this summer in British Columbia and the Pacific Northwest would have been "virtually impossible" without the impacts of human-caused climate change, according to a recent study from the <a href="https://www.worldweatherattribution.org/">World Weather Attribution</a>. The scientists said that the climate crisis has increased the likelihood of an extreme heat wave in this particular region by more than 150 times.

The IPCC report points out that severe heat waves which used to happen only once every 50 years are now happening about once a decade, as a direct result of global warming. 

The research is based on more than 14,000 scientific studies. The analysis has produced a despairing picture of the future that humans are creating for our planet. 

Severe droughts are happening 1.7 times as often, fire seasons are getting longer and more intense, and tropical storms are getting stronger. Furthermore, rainfall and snowfall extremes are becoming less predictable.

"There is no uncertainty language in this sentence, because there is no uncertainty that global warming is caused by human activity and the burning of fossil fuels," said co-author Friederike Otto, a climatologist at the University of Oxford.

On the bright side, we still have an opportunity to prevent many of the worst impacts of climate change. For example, by drastically reducing greenhouse gas emissions, we could keep global warming below 1.5°C. This would limit sea level rise to just a couple feet over the next century. 

On the other hand, the IPCC report shows that exceeding the 1.5°C global warming target could ultimately lead to 20 feet or more of global sea level rise.

The researchers say that unless immediate, rapid and large-scale action is taken to reduce emissions, the average global temperature is likely to reach or cross the 1.5-degree Celsius warming threshold within 20 years.

“We are now committed to some aspects of climate change, some of which are irreversible for hundreds to thousands of years,” said IPCC co-author Tamsin Edwards of King’s College London. “But the more we limit warming, the more we can avoid or slow down those changes.”

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Humans are "unequivocally" to blame for the climate crisis

The effects of the climate crisis have become more widespread...

Gut microbes may be a new therapeutic target to promote healthy <a href="https://www.earth.com/news/self-control-in-childhood-linked-to-slower-aging/">aging</a>, according to the results of a new study from <a href="https://www.ucc.ie/">University College Cork</a> (UCC).

The researchers have introduced a novel approach to reverse age-related deterioration in the brain through the gut microbiome.

"The gut microbiota is increasingly recognized as an important regulator of host immunity and brain health," wrote the study authors. 

"The aging process yields dramatic alterations in the microbiota, which is linked to poorer health and frailty in elderly populations. However, there is limited evidence for a mechanistic role of the gut microbiota in brain health and neuroimmunity during aging processes." 

To investigate, the experts conducted fecal microbiota transplantation from either young or old donor mice into aged recipient mice. The young donor-derived microbiota were found to reduced age-associated impairments in cognitive behavior among the aging recipients. 

The research team was led by Professor John F. Cryan, Vice President for Research &amp; Innovation, University College Cork as well as a Principal Investigator at APC Microbiome Ireland.

“Previous research published by the APC and other groups internationally has shown that the  gut microbiome plays a key role in aging and the aging process," said Professor Cryan.

"This new research is a potential game changer, as we have established that the microbiome can be harnessed to reverse age-related brain deterioration. We also see evidence of improved learning ability and cognitive function."

While the research is very exciting, Professor Cryan cautions that much more research is needed to see how these findings could be translated in humans.

The study is particularly relevant today, as the global population ages. Nearly every country in the world is experiencing growth in the number of older individuals in their population.

With this is mind, it is critically important to develop strategies to maintain healthy brain function. The groundbreaking new research opens up a potentially new therapeutic strategy that targets gut microbes to slow down brain aging and associated cognitive problems. 

“This research of Professor Cryan and colleagues further demonstrates the importance of the gut microbiome in many aspects of health, and particularly across across the brain/gut axis where brain functioning can be positively influenced," said APC Director Professor Paul Ross. 

"The study opens up possibilities in the future to modulate gut microbiota as a therapeutic target to influence brain health."

The study is published in the journal <a href="https://www.nature.com/nataging/">Nature Aging</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Gut microbes may be the key to healthy aging

Gut microbes may be a new therapeutic target to promote...

Record-breaking weather events, both hot and <a href="https://www.earth.com/news/warm-river-habitats-are-important-for-cold-water-fish/">cold</a>, may actually share the same underlying mechanism. An international research team has looked into three extreme events from the past winter to identify the forces that are driving such swings in the weather. 

"By studying these record-breaking cold spells, we can see the ’big picture‘ of extreme weather events.” said study co-author Zhe Han, a scientist in the Institute of Atmospheric Physics at the <a href="https://english.cas.cn/">Chinese Academy of Sciences</a>. 

“Though the events can be different, they might share similar underlying mechanisms that are related to the global warming. Along with the warming, the Arctic amplification and intensified ocean thermal anomalies may interact with the atmospheric circulation, such as the polar vortex and sudden stratospheric warming, to cause the occurrence of extreme cold or hot events."

On July 9, 2021, the highest temperature on Earth was recorded at 130 degrees Fahrenheit in Death Valley, California. This record was broken just months after record-low temperatures were recorded across Asia and the United States. 

“The overarching problem to solve is why extreme weather events have more frequently occurred in a warming climate during recent decades and if the Arctic warming amplification plays a leading driving role,” said first author Professor Xiangdong Zhang of the University of Alaska Fairbanks. 

“The extreme events of the 2020-21 winter provide a unique opportunity to examine what physical processes or mechanisms drive these events.”

The study was focused on two record-setting cold air outbreaks in China from late December 2020 to mid-January 2021. During this time, Beijing and Tiajin experienced their lowest temperatures in 54 years.

The researchers also examined the historic cold spell that struck the United States in the Midwest and the South. In Austin, Texas, the temperature dropped its lowest in almost a century at eight degrees Fahrenheit.

The team used both observational data and simulated models to investigate out how sea and atmospheric events may have driven the extreme weather of the 2020-21 winter compared to the last 42 winters.

“Even though global warming and loss of Arctic Sea ice occurs every year, such extreme weather events that we investigate are intermittent - they do not occur every year,” said study co-author James Overland, an oceanographer at the National Oceanic and Atmospheric Administration (NOAA) Pacific Marine Environmental Laboratory. 

“This is because they are caused by a combination of new global warming and extreme, but naturally occurring, precursor weather conditions in the jet stream and polar vortex.”

Zhang explained that abrupt temperature increases in an upper layer of the atmosphere, called sudden stratospheric warming, can drastically alter how the polar vortex and jet stream behave and interact. The weather that results can become even more extreme with fluctuations in ocean temperatures and Arctic sea ice.

“The simultaneous occurrence of anomalous ocean thermal conditions in three ocean basins and the interaction of atmospheric dynamics drove hemispheric-scale, systematic changes in the atmospheric circulation, or weather pattern, to an extremely anomalous state.”

The researchers found that all three events were linked to a sudden stratospheric warming event, but the downstream effects were different in each one. 

In the first event in East Asia, cold polar air steered the midlatitude jet stream southward. During the second event, the polar vortex split, deepening a region of low pressure and circulating with cooler Arctic air. In North America, the polar vortex was also split, but in this case the lower atmosphere settled deeper over the south.

“When attributing the factors responsible for an extreme event, we should have a broad point of view to catch the big picture,” said study co-author Professor Timo Vihma from the Finnish Meteorological Institute. “It may consist of complex interactions of several factors acting far from each other in the hemispherical scale.”

Study co-author Annette Rinke, senior scientist at the Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research in Germany, explained that extreme winter weather events are often driven by "remote" factors.

“The study shows that anomalies in ocean temperatures in addition to the large-scale atmospheric circulation can play a key role in extreme weather events,” said Rinke.

The research is published in the journal <a href="https://www.springer.com/journal/376">Advances in Atmospheric Sciences</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Extreme weather events may share the same mechanism

Record-breaking weather events, both hot and cold, may actually share...

An abrupt increase in extreme precipitation across the northeastern United States is part of a larger trend, according to a new study from <a href="https://home.dartmouth.edu/">Dartmouth College</a>. 

States from West Virginia to Maine have experienced heavier rain and snowfall since 1996. The experts found that this excess precipitation has coincided with warming sea surface temperatures in the North Atlantic. 

Extreme precipitation in the Northeast is typically caused by tropical cyclones, thunderstorms, and extratropical cyclones like Nor’easters.

The new study has linked the last 25 years of extreme precipitation in the Northeast to greenhouse gases from human activity and a warming Atlantic Ocean.

“Our previous work has shown that Northeast extreme precipitation has increased dramatically over the past 25 years, but this study is among the first to demonstrate that this rise is partially due to anthropogenic climate change,” said study lead author Huanping Huang.

In an earlier study, the Dartmouth team found that the Northeast has experienced a 53 percent increase in extreme precipitation since 1996, and that the primary driver of the increase is heavier rainfall from tropical cyclones. 

The researchers linked this weather phenomenon to a warmer atmosphere - which can hold more water - and to a warmer Atlantic Ocean - which drives stronger and more frequent hurricanes. 

“Our results demonstrate that multidecadal variability in Atlantic sea surface temperatures, an important driver of warming in the Atlantic, alongside anthropogenic greenhouse gases and aerosols, also contributed to the increase in Northeast extreme precipitation after 1996,” explained Huang.

The warming of the North Atlantic Ocean since the 1990s is tied to both natural variability and an increase in greenhouse gases. This warming is also tied to a decrease in aerosols, which pollute the air and reflect sunlight, creating a cooling effect. 

“Our analysis illustrates that decreased aerosols and increased greenhouse gases from human activity have contributed to both the rise in Northeast extreme precipitation and North Atlantic sea surface temperatures,” said study co-author Professor Jonathan Winter. 

“Our research team has been exploring this dramatic increase in extreme precipitation for several years now, and this study confirms that humans are in fact, partially responsible for the increase in heavy rain events that we have been experiencing over the past two and a half decades.”

The study is published in the journal <a href="https://www.journals.elsevier.com/weather-and-climate-extremes">Weather and Climate Extremes</a>.

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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Extreme precipitation in the Northeast linked to human activity

An abrupt increase in extreme precipitation across the northeastern United...

Researchers at <a href="https://www.qut.edu.au/">Queensland University of Technology</a> have developed electrodes for batteries that can be recharged at a much faster rate. The inspiration for the research is a water-carrying membrane that is found inside of bamboo - the fastest growing <a href="https://www.earth.com/news/plant-foods-linked-to-drastically-lower-risk-of-heart-disease/">plant</a> in the world.

Professor Ziqi Sun was first inspired for the study when he walked past a clump of bamboo in the Brisbane City Botanic Gardens. His work is focused on mimicking natural objects, such as seashells and fish scales, to develop sustainable energy solutions.

According to Professor Sun, the new study was focused on the multilayer membrane that runs up inside the bamboo stem. This membrane, which is about as thick as a piece of paper, is responsible for the ultrafast transport of water and nutrients. 

Thanks to this tissue, bamboo can grow up to an estimated rate of about 40 millimeters per hour.

Professor Sun said the membrane was made up of layers, with the layers packed very closely together on the side closest to the inner ring of the bamboo, and further apart on the side nearest the center of the bamboo. The layers also have a porous structure on the surface.

“Why does the bamboo have this membrane? It’s not just something for decoration, it must be for some specific function," explained Professor Sun.

Study first author Dr. Jun Mei said the unique structure and its function deserved an in-depth study.

“The membrane is the most important component in the energy storage devices, and it would be very exciting if we could find a potential material candidate for energy storages by learning from the relationship between the membrane structure and the specific function,” explained Dr. Mei.

The researchers found that this multilevel structure enables water and electrolytes to travel through the bamboo in two ways.

The inner layer enables the “superfluidic” travel of the liquid and electrolytes, which means the liquid travels very quickly through the plant. The outer layer allows the liquid to be more quickly dispersed throughout the structure.

The research expands upon previous work that demonstrates the benefits of two-dimensional nanomaterials for the ultrafast transport of ions through a battery.

“Nature has taught us how to design with these kinds of two-dimensional materials, and how a multilevel distribution of the space will be much more helpful for high-performance batteries,” said Professor Sun.

The researchers developed their own membrane using layers of nanosheets of cobalt oxides and graphene. Each individual sheet was about 100,000 times thinner than a human hair.

Ultimately, the bioinspired membranes showed a superwetting behavior towards organic electrolyte. This means there was no barrier for the contact and entry of the electrolyte from the surface into the inside membrane.

“The study offers a new principle in designing high-performance energy materials,”said Professor Sun. “Most importantly, it paves a way for future materials intervention by learning from the greatness of nature.”

The study is published in the journal <a href="https://onlinelibrary.wiley.com/journal/16163028">Advanced Functional Materials</a>.

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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

As the world's fastest growing plant, bamboo inspires new technology

Researchers at Queensland University of Technology have developed electrodes for...

Major depressive disorder is the most common mental illness worldwide. Depression has been associated with a reduction in neuroplasticity, that is a decrease in the brain’s ability to form neurons and reorganize connections between existing <a href="https://www.earth.com/news/rat-brains-are-wired-to-help-their-loved-ones-in-times-of-crisis/">brain</a> cells.

A recent study published in the journal <a href="https://www.frontiersin.org/journals/psychiatry">Frontiers in Psychiatry</a> has found that physical activity not only reduces the symptoms of depression, but also improves the brain’s ability to change. 

“The results show how important seemingly simple things like physical activity are in treating and preventing illnesses such as depression,” said Professor Dr. Karin Rosenkranz.

Participants in the study were in-patients who were hospitalized for depression at the University Clinic for Psychiatry and Psychotherapy at <a href="http://www.ruhr-uni-bochum.de/en">Ruhr-Universität Bochum</a>, Germany. They were divided into two groups; one group took part in a three-week program of organized physical activity, while the other group did not. 

Physical activity involved non-competitive exercises of moderate intensity that included endurance, strength and coordination elements, along with interaction and teamwork.

The severity of participants’ depressive symptoms was assessed before the start of the exercise program, and again after its completion. Symptoms included loss of interest, lack of motivation and prevalence of negative feelings. In addition, brain plasticity was measured using transcranial magnetic stimulation.

The results showed that brain plasticity improved significantly in participants who took part in physical activity. The individuals even achieved levels of plasticity that were the same as those found in healthy people. “The ability to change is important for all of the brain’s learning and adaptation processes,” explained Dr. Rosenkranz.

Furthermore, the severity of depressive symptoms decreased. The researchers found that the stronger the improvement in brain plasticity, the more the clinical symptoms decreased. 

Previous research has shown that physical activity is associated with greater neuroplasticity in healthy people, and also that it protects people against the onset of depression. 

“It is known that physical activity does the brain good, as it, for instance, promotes the formation of neuron connections. This could certainly also play a role here,” explained Dr. Rosenkranz.

What is clear is that interventions aimed at improving brain plasticity could be crucial in the treatment of depressive disorders in future. 

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By <a href="http://bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Exercise triggers changes in the brain that reduce depression

Major depressive disorder is the most common mental illness worldwide....

The Atlantic Meridional Overturning Circulation (AMOC) may have been gradually losing stability over the past one hundred years, according to a new study by Niklas Boers from the <a href="https://www.pik-potsdam.de/en/home">Potsdam Institute for Climate Impact Research</a>.

The results of this study are as concerning as they are surprising. The AMOC, which includes the Gulf Stream, is responsible for much of the <a href="https://www.earth.com/news/rising-temperatures-alter-photosynthesis-and-plant-growth/">temperatures</a> in Europe and has an important influence on the overall global climate. 

Until now, the collapse of this ocean system had seemed unlikely. If it’s the new reality, there could be dire consequences. 

“The Atlantic Meridional Overturning really is one of our planet’s key circulation systems,” said Boers. “We already know from some computer simulations and from data from Earth’s past, so-called paleoclimate proxy records, that the AMOC can exhibit - in addition to the currently attained strong mode - an alternative, substantially weaker mode of operation. This bi-stability implies that abrupt transitions between the two circulation modes are in principle possible.”

The AMOC redistributes heat and it’s predicted that if it collapses, there could be major changes to weather patterns. According to Britain's <a href="https://www.metoffice.gov.uk/">Met Office</a>, a collapse of the AMOC would increase cooling of the Northern Hemisphere, cause an overall drop in precipitation over Europe and North America, and lead to a shift in monsoons in South America and Africa, 

“The difference is crucial. Because the loss of dynamical stability would imply that the AMOC has approached its critical threshold beyond which an abrupt and potentially irreversible transition to the weak mode could occur,” said Boers.

Previous research has shown that the AMOC is weaker than it’s been at any point in the last thousand years. It’s been unclear whether this weakness is due to a slowing in pace or a loss of stability. Unfortunately, the research suggests that it’s the latter. According to Boers, the culprit seems to be warming.   

“Most evidence suggests that the recent AMOC weakening is caused directly by the warming of the northern Atlantic ocean. But according to our understanding, this would be unlikely to lead to an abrupt state transition." 

"Stability loss that could result in such a transition would be expected following the inflow of substantial amounts of freshwater into the North Atlantic in response to melting of the Greenland ice sheet, melting Arctic sea ice and an overall enhanced precipitation and river runoff,”

Direct observation of the AMOC for the last 100 years is non-existent. However, scientists can look at salinity patterns in the Atlantic to look at temperatures and overall climate. Unfortunately, this evidence suggests that indeed AMOC may be close to collapse. 

The research is published in the journal <a href="https://www.nature.com/nclimate/">Nature Climate Change</a>.

---

By <a href="http://zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Atlantic Ocean currents may soon change for the worse

The Atlantic Meridional Overturning Circulation (AMOC) may have been gradually...

Many research studies have investigated the potential health benefits behind fasting, usually exploring the effect on blood pressure, weight loss, and other health points in humans. However, a recent study from the <a href="https://www.ubc.ca/">University of British Columbia</a> has explored new ground,  concluding that fasting before and after exposure to Salmonella enterica bacteria prevents mice from developing a full-blown infection. 

The conclusion is based on the discovery that the gut microbiomes of mice change after fasting. The mice were made to fast for 48 hours before and during oral infection of Salmonella, a common foodborne illness in humans. 

We have known for decades that humans and animals alike lose their appetites during an infection, but it has remained unclear whether fasting increases their susceptibility or protects a host from infection. The new study shows that fasting decreased the levels of infection in comparison to fed mice, almost eliminating all inflammation and intestinal tissue damage.

Once mice were re-fed for a day after their 48-hour fast, the presence of Salmonella greatly increased and invaded the intestinal wall. However, inflammation levels that are usually associated with infection were still significantly decreased compared to normal. 

Interestingly, the decreases in infection rates were only identified within mice that were exposed to Salmonella orally, with intravenous exposure showing no effect from fasting. 

Another interesting observation is that fasting did not fully protect mice that were bred to be germ-free, hence lacking a regular microbiome. The researchers recreated the experiment using the bacteria Campylobacter jejuni, and similar results were found. 

The study ultimately suggests that fasting promoted highly beneficial changes within the gut microbiome and that these benefits were transferrable to other bacterial infections and were not restricted to Salmonella alone. 

“These data suggest that therapeutic fasting or calorie restriction has the potential to beneficially modulate infectious and potentially non-infectious gastrointestinal diseases," concluded lead researcher Bruce Vallance.

“Our research highlights the important role that food plays in regulating interactions between the host, enteric pathogens, and the gut microbiome," wrote the study authors.

"When food is limited, the microbiome appears to sequester the nutrients that remain, preventing pathogens from acquiring the energy they need to infect the host. While more research is needed, fasting or otherwise adjusting food intake could be exploited therapeutically to modulate infectious diseases in the future.”

The research has been published in <a href="https://journals.plos.org/plospathogens/">PLOS Pathogens</a>.

---

By <a href="http://calumvaughan05@gmail.com">Calum Vaughan</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Fasting may help ward off infections, a new study suggests

Many research studies have investigated the potential health benefits behind...

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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

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

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



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



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



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



Video/Image Credit: ESA&nbsp;



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

Lake Trasimeno in Central Italy

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



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



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



Video Credit: American Chemical Society&nbsp;



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



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

Detecting mercury contamination with the tap of a finger

[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

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

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

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



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



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



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



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



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



Video Credit: Johns Hopkins&nbsp;



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



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

Interactive map of the universe includes 200,000 galaxies

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



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



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



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



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



Video Credit: ESA&nbsp;&nbsp;



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



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

Lesotho: Africa's "Kingdom in the Sky"

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



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



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



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



Video Credit: ESA&nbsp;



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



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

The city of Dublin on Ireland's east coast

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



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



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



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



Video/ Image Credit: ESA



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



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

The province of Zaragoza in northeast Spain

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



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



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



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



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



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



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



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



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



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



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

The rapid retreat of the Columbia Glacier

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



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



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



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



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



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



Video &amp; Image Credit: ESA



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



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

The Pyrenees Mountains in southwest Europe

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



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



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



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



Video Credit: NASA Goddard



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



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



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

Two distant planets may be "water worlds"

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

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



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



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



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



Video Credit: NASA Goddard&nbsp;



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



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

Satellites reveal how Earth's systems are interconnected

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

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



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



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



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



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



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



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



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

Tiger sharks are shifting poleward as temperatures rise

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

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



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



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



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



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



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



Video Credit: ESA&nbsp;



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



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

Melt ponds on the Greenland Ice Sheet

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



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



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



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



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



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



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



Video Credit: ESA



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



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

The history of Mars is much more complex than we thought

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



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



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



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



Video Credit: Stowers Institute for Medical Research



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



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

Cavefish are healthy despite their sedentary lifestyle

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



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



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



Video Credit: NASA Earth Observatory&nbsp;



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



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

Satellites capture the world's biggest and fastest waves

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



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



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



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



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



Video Credit: European Space Agency&nbsp;



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

Satellites have become essential to our survival

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