An asteroid impact on Mars 11 million years ago sent fragments of the red planet hurtling through space. One of these pieces eventually crashed into Earth, making its way to Purdue University and becoming known as the Lafayette Meteorite.&nbsp;



This rare find has been instrumental in unlocking secrets of <a href="https://www.earth.com/news/manganese-discovery-ancient-mars-earth-like-water-lake-habitable/" target="_blank" rel="noreferrer noopener">Mars</a>’ watery past, with new research recently published in the journal <a href="http://dx.doi.org/10.7185/geochemlet.2443" target="_blank" rel="noreferrer noopener">Geochemical Perspective Letters</a> that provides insight into the timing and nature of Mars’ ancient water activity.



<h2 class="wp-block-heading" id="h-tracing-mars-watery-past">Tracing Mars’ watery past</h2>



Scientists have long known that the Lafayette Meteorite interacted with liquid water on Mars, but the exact timing of this event was uncertain.&nbsp;



Dr. Marissa Tremblay, an assistant professor at Purdue University’s <a href="https://www.eaps.purdue.edu/" target="_blank" rel="noreferrer noopener">Department of Earth, Atmospheric, and Planetary Sciences</a> (EAPS), led an international research team to determine the age of the water-altered minerals in the meteorite, pinpointing it to 742 million years ago.



“Dating these minerals can therefore tell us when there was liquid water at or near the surface of Mars in the planet's geologic past,” Tremblay explained.&nbsp;



The findings suggest that while liquid water wasn’t abundant on the surface at this time, it likely came from melting subsurface ice, or permafrost, caused by intermittent volcanic activity - a phenomenon still observed on Mars today.



<h2 class="wp-block-heading" id="h-preserving-a-moment-in-mars-geological-timeline">Preserving a moment in Mars’ geological timeline</h2>



The study not only identified when water interacted with the meteorite but also established that the dating was unaffected by events after the meteorite left Mars.&nbsp;



“The age could have been affected by the impact that ejected the Lafayette Meteorite from Mars, the heating it experienced during the 11 million years it was floating in space, or the heating when it fell to Earth,” Tremblay said.&nbsp;



However, the team confirmed that none of these factors altered the age, validating the timeline of <a href="https://www.earth.com/news/mars-lost-most-of-its-water-but-where-did-it-go/" target="_blank" rel="noreferrer noopener">water</a> interaction.



Study co-author and Purdue EAPS researcher Ryan Ickert applied heavy isotope analysis to further verify that previous data on the meteorite’s water-rock interaction had likely been skewed by other geological processes.&nbsp;&nbsp;



“This meteorite uniquely has evidence that it has reacted with water. The exact date of this was controversial, and our publication dates when water was present,” said Ickert.



<h2 class="wp-block-heading" id="h-mysterious-journey-of-the-meteorite">Mysterious journey of the meteorite </h2>



The Lafayette Meteorite’s journey to Purdue is something of a mystery. It was found in a university drawer in 1931, though how it got there remains unknown.&nbsp;



In previous research, Tremblay and her team used crop disease markers from organic contaminants found on the meteorite to narrow down when it might have fallen to Earth.



Once the meteorite was ejected from Mars, it endured constant cosmic ray bombardment in space, which produced certain isotopes, offering clues to its time of impact on Earth.&nbsp;



“Many meteoroids are produced by impacts on Mars and other planetary bodies, but only a handful will eventually fall to Earth,” Tremblay said.



<h2 class="wp-block-heading" id="h-planetary-time-capsules">Planetary time capsules</h2>



Meteorites like Lafayette serve as planetary time capsules, offering invaluable data on the geological and environmental history of their <a href="https://www.earth.com/news/most-meteorites-can-be-traced-to-three-asteroid-families/" target="_blank" rel="noreferrer noopener">home worlds</a>. With their dense structure, metallic content, and magnetic properties, meteorites are often distinguishable from Earth rocks.&nbsp;



“We can identify meteorites by studying what minerals are present in them, their mineral relationships, and by checking for a fusion crust formed during entry into Earth’s atmosphere,” Tremblay explained.&nbsp;



By analyzing these traits and their chemical signatures, scientists can often determine a meteorite’s planetary origin.



<h2 class="wp-block-heading" id="h-complex-history-of-meteorites">Complex history of meteorites</h2>



This research marks a significant milestone for the team, which included scientists from institutions across the globe, such as the Scottish Universities Environmental Research Center (SUERC), the University of St. Andrews, the University of Glasgow, the University of Bristol, and London’s <a href="https://www.nhm.ac.uk/" target="_blank" rel="noreferrer noopener">Natural History Museum</a>.&nbsp;



“Before moving to Purdue, Ryan and I were both based at SUERC, where the argon-argon isotopic analyses of the alteration minerals in Lafayette took place,” Tremblay said.&nbsp;



Their partners at SUERC and the Natural History Museum have long contributed to studying Lafayette’s complex history.



<h2 class="wp-block-heading" id="h-dating-minerals-in-meteorites">Dating minerals in meteorites</h2>



Dating the water-altered minerals in Lafayette, and others in its class of Martian meteorites called nakhlites, has been a central focus in planetary science, as they uniquely capture moments when liquid water was present on Mars.&nbsp;



Due to complex alterations over time, previous attempts to date these minerals were plagued with uncertainties.&nbsp;



However, the team has now developed a robust dating method that could be applied to other meteorites, enhancing our understanding of when water might have been present on Mars and other planetary bodies.



<h2 class="wp-block-heading" id="h-the-future-of-planetary-science">The future of planetary science</h2>



Thanks to the Stahura Undergraduate Meteorite Fund, Tremblay and Ickert’s research on the Lafayette Meteorite will continue, with the involvement of undergraduate students in Purdue EAPS.&nbsp;



This opportunity allows students to engage in real-world planetary science, helping to reveal the intricate histories of meteoritic samples.



Tremblay and her team’s work on the Lafayette Meteorite highlights its scientific significance, revealing a complex history that ties it to Mars’ geological past.&nbsp;



Their findings not only deepen our understanding of Mars but also set a precedent for future studies that might unveil even more about the red planet’s climate history, water activity, and potential for supporting <a href="https://www.earth.com/news/some-mars-rocks-contain-signs-of-life-scientists-call-to-bring-them-back-to-earth/" target="_blank" rel="noreferrer noopener">life</a>.



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Meteorite that struck Mars reveals when the planet had liquid water

An asteroid impact on Mars 11 million years ago sent fragments of the red planet hurtling through space. One of these pieces eventually crashed into Earth, making its way to Purdue University and becoming known as the Lafayette Meteorite.&nbsp; This rare find has been instrumental in unlocking secrets of Mars’ watery past, with new research recently published in the journal Geochemical Perspective Letters that provides insight into the timing and nature of Mars’ ancient water activity. Tracing Mars’ watery past Scientists have long known that the Lafayette...

Ancient human bone fossils have been found in numerous excavations with bite marks that align with human teeth. This is widely accepted as evidence that our early ancestors resorted to cannibalism at times, and most researchers believe the practice occurred as a result of other food sources running low.  

But research by Dr. James Cole, an archeologist from England’s <a href="https://www.brighton.ac.uk/">University of Brighton</a>, suggests that the relative lack of caloric content of humans points the motive in another direction – social or cultural ritual.

Cole arrived at that conclusion by examining nine sites where bone fossils exhibiting signs of cannibalism had been found. The sites conformed to the Paleolithic period, some 14,000 to 900,000 years ago, and reflected the dietary behavior of modern man as well as Neanderthals and two other extinct branches of human evolution.

He estimated that the caloric value of a human is no higher than that of many other meat sources that would have been available. And why would it be worth the risk of trying to add one of their own kind to the menu? Cole wondered.

“You're dealing with an animal that is as smart as you are, as resourceful as you are, and can fight back in the way you fight them,” he said.

He figured that most would of our ancestors would have figured it was less risky and much more of a feast to take down a <a href="https://www.earth.com/news/scientists-woolly-mammoths-extinction/">woolly mammoth</a> instead. Cole recognized that a certain amount of the human feasting could have been done out of convenience. Perhaps some meal sources consisted of tribe members who’d died and it was easier to consume them than to go on the hunt. But he didn’t feel that such a decision would be made frequently, and that most of the cannibalistic evidence we see through fossil study was motivated by factors beyond calories. It was more often a matter of choice, he wrote.

For instance, in some cases they might have been prisoners taken in battle and consumed for ritualistic reasons.

Cole’s paper was published in Scientific Reports.

-- 

By <a href="mailto:dsearls@earth.com">David Searls</a>,<a href="https://www.earth.com/staff/"> Earth.com</a> Staff Writer

Source:<a href="http://www.nature.com/articles/srep44707"> Scientific Reports</a>

Why early man might have practiced cannibalism

Ancient human bone fossils have been found in numerous excavations...

Our current understanding of the brain and memory is that when something happens it’s stored as a short-term memory in the hippocampus, and then transferred to long-term storage in the cortex.  Now, new research from <a href="http://web.mit.edu/">Massachusetts Institute of Technology</a> suggests that our memories are stored simultaneously in short- and long-term memory chambers, but the memory isn’t activated in long-term for a period of perhaps two weeks.  

To illustrate, lab <a href="https://www.earth.com/news/zombie-killer-mice/">mice</a> undergoing brain scans by MIT researchers were given mild shocks. They immediately remembered the shock in the hippocampus, the part of the brain where researchers already know short-term memory is temporarily stored. But then something unexpected happened: the shock simultaneously triggered a memory response in another part of the mouse brain, the prefrontal cortex.

The mice would freeze the next day when in the corridor where the shock occurred, and researchers could see the memory being activated in the hippocampus. That same memory, however, went ‘silent’ in the cortex. That means the memory was present there, but it didn’t spur a response. The mice only froze when the researchers reactivated that part of the brain with light. Furthermore, after the shock memory was fully transferred to the cortex, and the memory went silent in the hippocampus, it could be reactivated here too, making the mouse freeze.

To researchers, this availability of memory in two brain locations suggested the possibility of turning memories on or off by activating or silencing this mechanism to benefit the patients.

“If we identified a mechanism for the overactive memory in PTSD to be switched back to silent, we may find a way to treat the disease,” lead author Dr. Takashi Kitamura told the <a href="http://www.dailymail.co.uk/">Daily Mail</a>. “Additionally, we could potentially activate the frozen, silent memories of amnesiac patients to retrieve their past.”

-- 

By <a href="mailto:dsearls@earth.com">David Searls</a>,<a href="https://www.earth.com/staff/"> Earth.com</a> Staff Writer

Source:<a href="http://www.dailymail.co.uk/sciencetech/article-4387392/Is-memories-stored-brain.html"> Daily Mail</a>

How does the brain store and recall memories?

Our current understanding of the brain and memory is that...

Through the analysis of recovered mineral samples that originated from deep inside the Earth’s <a href="https://www.earth.com/news/volcanic-rock-earths-ancient/">mantle</a>, scientists can catch a glimpse of the dynamic processes that are occurring under our feet, as well as gain further understanding of the history of the mantle layer.

A research team in China recently discovered a rare sample of the mineral majorite they believe originated at least 235 miles below the planet’s surface. Majorite is a type of garnet – a group of silicate minerals – that is only formed at depths greater than 100 miles.

Even more intriguing, this particular majorite sample was encased inside a regular garnet. The researchers also discovered the majorite was rich in ferric iron, which is an oxidized form of iron that is not usually found in this type of mineral. These unique factors led to the scientists investigating the majorite’s origins further.

The research team – led by Yingwei Fei, a <a href="https://carnegiescience.edu/">Carnegie</a> experimental petrologist, and Cheng Xu, a field geologist from <a href="http://english.pku.edu.cn/">Peking University</a> – used a multitude of analytical techniques to determine the chemical and structural characteristics of this sample.

In an effort to determine the exact depth of the sample’s origin, they conducted high-pressure experiments that mimicked the formation conditions of natural majorite. From their results, the researchers were able to pinpoint its origin to a depth of almost 250 miles. This would place the majorite formation at the bottom of the soft part of the upper mantle – known as the asthenosphere – which drives plate tectonics.

What makes the discovery of this majorite sample so interesting is that it’s extremely unusual for a high-pressure majorite to survive moving from that depth of origin towards the surface.

In addition, the regular garnet that encased the majorite is usually formed at a much shallower depth of around 125 miles. Thus, this sample’s existence required two separate geological events to explain. The researchers could possibly use this “time capsule” as a way to better understand the history of the Earth’s mantle.

Fei explains, “This two-stage formation process offers us important clues about the mantle's evolutionary stage at the time when the majorite was first formed.” 

The researchers point to the majorite’s location and depth of origin as an indication that this is a relic from the end of an era of supercontinent assembly, which took place a whopping 1.8 billion years ago.

The team hopes to return to the site this summer in order to uncover fresh rocks that will lead to more clues about the processes that are occurring in the Earth’s mantle. 

More information on this study can be found in the journal <a href="http://advances.sciencemag.org/">Science Advances</a>.

&nbsp;

[caption id="attachment_259318" align="aligncenter" width="455"]<a href="https://www.earth.com/wp-content/uploads/2017/04/137431_web.jpg"><img class="size-full wp-image-259318" src="https://www.earth.com/wp-content/uploads/2017/04/137431_web.jpg" alt="" width="455" height="439" /></a> Credit: Yingwei Fei[/caption]

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: <a href="https://carnegiescience.edu/">Carnegie Institution for Science</a>

Image Credit: Yingwei Fei

&nbsp;

&nbsp;

Rare mineral formation provides a glimpse at the Earth’s mantle

Through the analysis of recovered mineral samples that originated from...

Living in a polluted city comes with a long list of risks and health issues that have been known for decades… and a new study just added one more. According to recent research involving almost 280,000 women in the United States, living in an area with a high level of fine particles from air pollution may increase a woman’s chance of having dense breasts. Now this is not an aesthetic problem, but a health risk, as increased breast density is a well-known risk factor for breast cancer.

Breast density is measured by mammography, which helps assess the relative amounts of different tissue types in the breast. In breasts with a majority of fatty tissue, it is easier to find abnormalities in the mammogram. Denser breasts have a higher percentage of fibroglandular tissue, which obscures mammography and would make a breast tumor more difficult to see.

They study found that for every one unit increase in fine particle concentration (PM2.5), a woman’s chance of having dense breasts increased by 4 percent. It also found that women with dense breasts were about 20 percent more likely to have experienced exposure to higher concentrations of PM2.5, while women with less dense breasts were 12 percent less likely to have been exposed.

The chemical make up of PM2.5 air pollution is known to include pollutants that have endocrine disrupting properties. The researchers believe that these pollutants could have an effect on breast density by interfering with growth of cells in the breast and increasing the relative amount of fibroglandular tissue. However, it must be noted that causation could not be established by this particular study.

The researchers also looked at the association between ozone exposure and breast density among the same group of women. Surprisingly, they found that for every one unit increase in ozone concentration, there was a 3% lower chance of having dense breasts.

Dr. Lusine Yaghjyan, lead author from the <a href="http://www.ufl.edu/">University of Florida</a>, explains: “We found a positive association between fine particle concentration exposure and breast density but an inverse association between ozone exposure and breast density. This is an intriguing result that warrants further investigation to unpick any possible biological mechanism that might cause ozone exposure to reduce a woman's chance of having dense breasts.”

Both the pollution and ozone factors require further study in order to shine a light on exactly how they influence breast density – especially given what is at stake. Dr. Yaghjyan continued, “Breast density is a well-established and strong breast cancer risk factor so future studies are warranted to determine if the observed associations are causal, which if confirmed may have implications for risk prevention.”]

More information on this study can be found in the open access journal <a href="https://breast-cancer-research.biomedcentral.com/">Breast Cancer Research</a>.

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: <a href="https://www.biomedcentral.com/">BioMed Central</a>

Air pollution may increase risk factors for breast cancer

Living in a polluted city comes with a long list...

According to a 2013 <a href="http://www.nytimes.com/">New York Times</a> article, one round-trip commercial air flight between New York City and San Francisco creates a carbon dioxide warming effect equivalent to two or three tons of CO2 per on-board person. For comparison sake, the average American generates about 19 tons of CO2 per year. Plane engines also emit carbon monoxide and other pollutants. That’s why engineers have been working to develop a commercially viable electric airplane for some time, and they took another step forward in March. 

That’s when the Extra 330LE earned a record for fasted electric airplane by attaining an airspeed of over 21o miles per hour from an airport in Germany.

The plane, piloted by German tests pilot Walter Extra, actually broke two records last month. In addition to achieving the record speed over a two-mile expanse of sky, it was the first electrically powered <a href="https://www.earth.com/news/climate-change-aircraft-turbulence/">aircraft</a> to tow a glider plane to cruising speed. This followed a December test flight in which the plane with the electric engine set a climbing record by vertically scaling nearly 10,000 feet in less than 4.5 minutes.

All of this was done with a Siemens electric engine that weighed a relatively skimpy 110 pounds. Keep in mind, with the weight challenges of commercial and freight aircraft, lighter is always better.

As impressive as the accomplishments have been, the technology still has a way to go. Siemens said that it’s electric motor puts out 260 kilowatts per hour, enough to lift aircraft weighing two tons. But that’s not enough. Tech developer Elon Musk, the founder of Tesla Motors and an entrepreneur also working on electric aircraft development, has said that the minimal power needs for aircraft is 400kW.

So when will that milestone be reached?

 “By 2030, we expect to see the first planes carrying up to 100 passengers and having a range of about 1,000 kilometers,” said Frank Anton, head of Siemens’ eAircraft division.

--

By <a href="mailto:dsearls@earth.com">David Searls</a>,<a href="https://www.earth.com/staff/"> Earth.com</a> Staff Writer

Source:<a href="http://www.nytimes.com/2013/01/27/sunday-review/the-biggest-carbon-sin-air-travel.html"> New York Times</a>,<a href="http://www.dailymail.co.uk/sciencetech/article-4385978/Battery-powered-plane-breaks-speed-record-hitting-210mph.html"> Daily Mail</a>

Photo: Jean-Marie Urlacher

Electric airplane engine sets two more air records

According to a 2013 New York Times article, one round-trip...

Below our feet is the Earth’s <a href="https://www.earth.com/news/underground-ocean-beneath-earth/">mantle</a>, a bed of solid rock that actually circulates slowly over millions of years. This slow circulation has led some geologists to assume that any geochemical traces of Earth’s history were wiped away long ago. However, a new study shows that this is not the case. Geologists from the <a href="https://www.umd.edu/">University of Maryland</a> have discovered traces of ancient Earth in volcanic rock that could date back more than 4.5 billion years – all the way to the origins of our planet.

The researchers studied volcanic rock that had recently erupted from volcanoes in Hawaii and Samoa. These rocks contained enlightening geochemical anomalies, which the scientists explain as the “fingerprints” of conditions that were around immediately following the formation of our planet.

The results of the study suggest that some of these volcanic rocks contain compounds that survived just about all of Earth’s history. This has researchers scratching their heads, as they are not quite sure how the Earth’s mantle preserved these anomalies.

Andrea Mundl, a postdoctoral researcher in geology at <a href="https://www.umd.edu/">UMD</a> and the lead author of the study, explains, “We found geochemical signatures that must have been created nearly 4.5 billion years ago. It was especially exciting to find these anomalies in such young rocks. We don't yet know how these signatures survived for so long, but we have some ideas.”

These signatures refer to the distinct ratios of key isotopes of two elements: tungsten and helium. The researchers were able to analyze volcanic rock samples for these rare isotopic ratios of tungsten, which indicated that the volcanic samples contained traces of ancient rock.

“Our tungsten data show that it is very primitive indeed, with the source region most likely forming within the first 50 million years of solar system history,” says Richard Walker, professor of geology at <a href="https://www.umd.edu/">UMD</a> and co-author of the paper.

The research team then compared these findings with analysis of specific ratios of helium isotopes. This data correlated with the tungsten isotopic ratios, indicating that these rocks had not been significantly altered since the formation of Earth.

The authors of this study suggest a few different scenarios that could have led to these tungsten and helium anomalies. They think that the volcanoes might be drawing material from the Earth’s core, or that the rocky outer surface of Earth might have formed in patches, with expansive magma oceans in between. Areas of these magma oceans could have crystallized and sunk to the boundary between the mantle and core, which might have preserved these isotopic signatures.

Mundl admits that “each of these scenarios contain some inconsistencies that we can’t yet explain.” But she believes these findings will only lead to further research that may be able to provide some answers.

More information on this study can be found in the journal Science on April 7, 2017.

[caption id="attachment_255563" align="aligncenter" width="800"]<a href="https://www.earth.com/wp-content/uploads/2017/04/137370.jpg"><img class="size-full wp-image-255563" src="https://www.earth.com/wp-content/uploads/2017/04/137370.jpg" alt="" width="800" height="500" /></a> Credit: USGS/J.P. Eaton[/caption]

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: <a href="https://www.umd.edu/">The University of Maryland</a>

New volcanic rock found to contain Earth’s ancient secrets

Below our feet is the Earth’s mantle, a bed of...

Circadian rhythms are a fundamental component to life on earth and have remained genetically unchanged throughout the evolution of animals. These rhythms are physical, mental, and behavioral patterns that correspond to the 24-hour cycle of the day – mostly cued by light or darkness as observed by the individual. For <a href="https://www.earth.com/news/dinosaur-species-similarities-humans/">humans</a>, we all know someone who constantly stays up into the wee hours of the morning and has a hard time waking up before noon. According to a new study published in the journal <a href="http://www.cell.com/cell/home">Cell</a>, some of these people may exhibit this behavior because a gene mutation has programmed their internal clock to run slowly.

People who stay up late and have trouble getting up early are usually referred to as “night owls.” Sleep clinics will often diagnose this night owl behavior as delayed sleep phase disorder, or DSPD. People with DSPD generally struggle to fall asleep at night, sometimes with sleep coming so late that it fractures into a series of long naps. Michael Young, the head of the Laboratory of Genetics at <a href="http://www.rockefeller.edu/">The Rockefeller University</a>, calls it “perpetual jet lag.”

Sleep disorders such as DSPD are associated with anxiety, depression, cardiovascular disease, and diabetes. Both Michael Young and Alina Patke – a research associate in Young’s lab and the first author of the study – decided to take a closer look at what causes this disrupted circadian rhythm.

Young connected with clinical researchers at the <a href="http://weill.cornell.edu/">Weill Cornell Medical College</a> in an attempt to find the molecular map behind these sleep disorders.

By studying the skin cells of people with DSPD, they found that a mutation in a gene called CRY1 actually alters the human circadian clock, throwing off the rhythmic behavior of a person’s sleep/wake cycle. Their results showed that carriers of the gene variant experienced nighttime sleep delays of 2 to 2.5 hours compared to non-carriers.

Patke explains, “Carriers of the mutation have longer days than the planet gives them, so they are essentially playing catch-up for their entire lives." Their study is the first to point towards a gene mutation in the development of DSPD, and sheds light on the genetic basis behind this sleep disorder.

While not all suffers of DSPD can be attributed to the CRY1 mutation – Patke herself is a night owl but does not carry the gene variant – the researchers found the mutation in 1 in 75 individuals of non-Finnish, European ancestry. They discovered this gene variation in what Young calls “a large fraction of the population,” by doing a gene database search.

Despite the CRY1 mutation potentially affecting millions of people, it is possible for the resulting sleep disorder to be properly managed. The circadian clock is very responsive to external environmental cues, so it can be easily influenced if the right steps are taken. “An external cycle and good sleep hygiene can help force a slow-running clock to accommodate a 24-hour day,” says Patke. “We just have to work harder at it.”

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: <a href="http://www.cell.com/about">Cell Press</a>

Are you a night owl? A gene mutation may explain why

Circadian rhythms are a fundamental component to life on earth...

A report published by <a href="http://web.unep.org/">United Nations Environment</a>, the <a href="http://fs-unep-centre.org/">Frankfurt School – UNEP Collaborating Centre</a>, and <a href="https://about.bnef.com/">Bloomberg New Energy Finance</a>, shows that the world added record levels of renewable energy capacity in 2016 as the cost of clean technology continues to fall.

Global Trends in Renewable Energy Investment 2017 found that wind, solar, biomass and waste-to-energy, geothermal, small hydro and marine sources added 138.5 gigawatts to global power capacity in 2016 – an 8 percent increase from the 127.5 gigawatts added in 2015. This added generating capacity roughly equals that of the world’s 16 largest existing power producing facilities combined.

The study also found that investment in renewables capacity roughly doubled that of fossil fuel generation, and the corresponding new capacity from renewables made up 55 percent of all new power – the highest to date.

The total investment was $241.6 billion – excluding large hydro – which is actually the lowest amount since 2013. Experts believe this is largely due to the falling costs of renewable energy. “Ever-cheaper clean tech provides a real opportunity for investors to get more for less,” says Erik Solheim, Executive Director of <a href="http://web.unep.org/">UN Environment</a>. “This is exactly the kind of situation, where the needs of profit and people meet, that will drive the shift to a better world for all.”

Although a lot of the renewable financing drop can be explained by reduced technology costs, the report also documents a slowdown in China, Japan, and some emerging markets for a variety of reasons. Renewable energy investment also dropped in both developed and developing countries.

However, investment in renewables increased by 3 percent in Europe, mainly due to the UK and Germany. Offshore wind was a major target of European investors, increasing by 53 percent from the previous year.

The proportion of electricity coming from renewables (excluding large hydro once again) rose a full percentage point, and prevented the emission of an estimated 1.7 gigatonnes of <a href="https://www.earth.com/video/carbon-dioxide-atmosphere/">carbon dioxide</a>.

Data from the International Energy Agency points to the switch to renewables as one of the key reasons for greenhouse gas emissions staying flat in 2016, even though output in the global economy rose by 3.1 percent.

Due to the dramatic cost reductions in technology for solar and wind, it “can provide the lowest cost new electrical power in an increasing number of countries, even in the developing world -- sometimes by a factor of two," explains Michael Liebreich, Chairman of the Advisory Board at BNEF. 

Although investment is down in some areas, a record level of renewable energy capacity was added this past year and the cost of much of the technology is only getting smaller. This is good news for anybody hoping to see fossil fuels phased out and renewable energy gain a stronger foothold worldwide.

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: <a href="http://web.unep.org/">UN Environment</a>

Renewable energy capacity is up as technology costs continue to fall

A report published by United Nations Environment, the Frankfurt School...

Sleep… we spend roughly one-third of our lives doing it, and while it may look like nothing, it’s a major part of a healthy lifestyle. The thing is, no one is really sure why sleep is necessary.

"Sleep must be serving some important function," says Jason Gerstner, an assistant research professor at <a href="https://medicine.wsu.edu/">Washington State University’s College of Medicine</a>, "But as scientists we still don't understand what that is. One way to get closer to that is by understanding how it is regulated or what processes exist that are shared across species."

In order to do this, Gerstner and his colleagues in Japan analyzed <a href="https://www.earth.com/news/cannabis-strain-flavors/">genes</a> that change expression over the sleep-wake cycle. They discovered that expression of the gene FABP7 tended to change over the day in the brains of mice. Furthermore, they found that mice with a “knocked out” – or absent – FABP7 gene slept more fitfully compared to mice with a normal FABP7 gene.

The researchers thought these findings might mean that this gene is a requirement for normal sleep in all mammals. The next step was to observe the actions of this gene expression in humans.

Gerstner and his team looked at data from nearly 300 Japanese men who underwent a seven-day sleep study, which included analyzing their DNA. They found that 29 individuals had an abnormal variant of the gene responsible for the production of FABP7. These subjects – similar to the mice – tended to sleep more fitfully. In other words, while they would get the same amount of sleep as others, their sleep was not as good and included more waking events.

Delving further, the researchers made transgenic fruit flies by inserting mutated and normal human FABP7 genes into their astrocytes, which are cells that support neuronal activity and help control behavior. They then monitored the flies’ sleep using an infrared beam that detected motion.

As luck would have it, flies with mutated FABP7 genes slept more fitfully – aligning perfectly with the results from the mouse and human studies.

Gerstner believes these results suggest “there's some underlying mechanism in astrocytes throughout all these species that regulates consolidated sleep.” Recent research has revealed that astrocytes – a form of glial cells – may have more of a role in the central nervous system than previously thought.

This particular research is especially exciting, Gerstner explains, “It's the first time we've really gained insight into a particular cell's and molecular pathway's role in complex behavior across such diverse species.”

Given that fruit flies have been around for about 60 million years, it “suggests we have found an ancient mechanism that persisted over evolutionary time,” says Gerstner. “Evolution does not keep something around that long if it is not important.”

Moving forward, Gerstner and his colleagues will look to see how the functions of FABP7 proteins may shed light on current theories about why sleep is so important.

More information on this study can be found in the open-access journal <a href="http://advances.sciencemag.org/">Science Advances</a>.

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: <a href="https://wsu.edu/">Washington State University</a>

Discovery of a sleep gene helps explain why we need rest

Sleep… we spend roughly one-third of our lives doing it,...

It is possible you may have noticed recent “clickbait” or “life-hack” headlines that suggest using common artificial sweeteners as insecticides to keep away houseflies. It’s also possible you may have tried this out or have boxes of Splenda being shipped to you right now. But scientists have come out with new research that could have your rushing to the computer to cancel that order.

A new study done by a team of researchers at <a href="https://www.ncsu.edu">North Carolina State University</a> suggests that these insects aren’t poisoned by artificial sweeteners – rather, they simply end up dying of malnutrition. 

The researchers tested the survival rate of houseflies (Musca domestica) on the main ingredient in Truvia – known as erythritol – compared to natural sugar, agar, and water alone. They discovered that the flies had a strong preference for the natural sugar over the erythritol when given the choice. When fed only erythritol, they had a similar mortality rate to flies fed only water or agar.

Michael Fisher, the lead author on the study and a doctoral candidate at <a href="https://www.ncsu.edu">NC State,</a> elaborates: “Based on our results, erythritol does not appear to have insecticidal properties on house flies in the traditional sense, and would not be a candidate for adult control.”

The research team also tested mannitol, xylitol, and sorbitol on flies, ultimately finding that only sorbitol had any nutritive value for the insects. They believe there are a multitude of reasons for why <a href="https://www.earth.com/news/fossilized-damselflies-mating-rituals/">flies</a> cannot survive on artificial sweeteners, including problems with digestion and a negative effect on the flies’ gut microbes.

Scientists also believe that real-world applications of a sweetener insecticide would face practical challenges, the most significant of which would likely be the presence of competing food sources. It appears even flies can understand that these sweeteners hold no nutritional value for them, and they would realistically avoid contributing to their own demise.

--

By Connor Ertz, Earth.com Staff Writer

Source: <a href="http://www.entsoc.org/">Entomological Society of America</a>

Can artificial sweeteners be an effective fly insecticide?

It is possible you may have noticed recent “clickbait” or...

Seaweed has been making more and more appearances on the shelves of people around the world, whether it’s as the new <a href="https://www.earth.com/news/study-seaweed-plays-major-role-global-carbon-cycle/">super food</a> or an ingredient in a beauty product. But now seaweed may also be making a push as an important component in the development of longer-lasting, more powerful batteries.

Researchers have recently come up with a material derived from seaweed that can help improve the performance of superconductors, lithium-ion batteries, and fuel cells. 

Dongjiang Yang of <a href="http://english.qdu.edu.cn/">Qingdao University</a> in China, says, “Carbon-based materials are the most versatile materials used in the field of energy storage and conversion. We wanted to produce carbon-based materials via a really 'green' pathway.” With seaweed being a very renewable resource, Yang decided to use seaweed extract in the production of these carbon-based materials.

The current energy landscape has been mainly based around traditional carbon materials like graphite. But in order to push forward the next generation of lithium-ion batteries and other storage devices, a more stable material is needed with a higher capacitance (the ability to store electric charge). With the current and necessary focus on sustainability, finding a sustainable material for this improvement was key.

Yang worked with a team to make porous carbon nanofibers from seaweed extract. After much-complicated trial and error, they were able to develop a seaweed-derived material that surpassed the capacity of traditional graphite anodes in lithium-ion batteries. If the supporting cathode can be of equal quality, this new battery could potentially double the range of electric cars.

Yang’s seaweed-based nanofibers also exhibited long-term stability and a high capacitance as a superconductor material. These characteristics indicate that these fibers could be used in zinc-air batteries – which are used in everything from car batteries to hearing aids – as well as supercapacitors. 

The researchers published their initial results in <a href="http://pubs.acs.org/journal/acscii">ACS Central Science</a> in 2015, but have since done further development on the materials. There is more work to be done before these seaweed-based materials can be commercialized. However, Yang is confident that it is only a matter of time.

--

By Connor Ertz, Earth.com Staff Writer

Source: <a href="https://www.acs.org/content/acs/en.html">American Chemical Society</a>

Seaweed may be the new sustainable superconductor

Seaweed has been making more and more appearances on the...

Scientists have announced the discovery of a new species of snail that is brightly colored, lives on shipwrecks, filter-feeds like a whale, and even shoots webs – kind of like Spiderman but a lot less cinematic. According to its discoverer, this snail shows “amazing adaptations” and could play an important role in coral reef restoration work.

Most <a href="https://www.earth.com/news/ocean-acidification-sea-snails/">snails</a> have coiled shells and are slow movers – but this isn’t like most snails. Instead, adult worm-snails have irregularly-shaped tubular shells that they cement onto a hard surface, meaning that they don’t move at all. Worm-snails will stick to one spot for the rest of their life, which makes them ideally suited for the hard surfaces of reefs and shipwrecks.

Dr. Rüduger Bieler, Curator of Invertebrates at <a href="https://www.fieldmuseum.org/">Chicago’s Field Museum</a> and the lead author of the paper, describes these new spiderman snails as “particularly weird animals,” that “could have a substantial impact on coral reef restoration efforts.”

Bieler was first intrigued by the snail’s giant slime glands, saying “Normally, snails produce a trail of slime so that they can glide on it in order to move. But worm-snails are stationary--what did they need slime glands for?”

It turns out that these slime glands are used to hunt rather than move. Using an extra pair of tentacles on their body, the snails shoot out a mucous web, “just like Spiderman – although in slow motion,” explains Bieler. Microorganisms get stuck in the web, which the snail then pulls back in to eat.

The new species, Thylacodes vandyensis, is named after “Vandy,” which is the nickname divers have given to the sunken naval vessel on which the worm-snails were first found. In fact, the USNS General Hoyt S. Vandenburg is the only location where this species is known to exist.

Intentional shipwrecks such as the USNS Vandenburg make up numerous artificial reef systems in the Florida Keys. According to Bieler, “…the deliberately scuttled shipwrecks are empty, brand-new real estate. There [are] fewer organisms to compete with for space on the artificial reef, and fewer resident predators.”

Although this new species is of great interest, their presence in these artificial reefs is not necessarily without consequence. Worm-snails could potentially harm corals and other reef organisms, possibly through reducing coral growth. They also are known to be hosts for certain blood flukes, which are parasites of loggerhead turtles.

Bieler believes it is imperative the researchers keep monitoring this new species, as “non-native and potentially invasive species like Thylacodes vandyensis might eventually make its way from the artificial reef to the natural reef and cause trouble for the animals living there.” The study’s author says that the artificial reefs may end up serving as “the canary in the coal mine,” indicating problems with invasive species before they can spread to the living reefs.

More information on this discovery can be found in the journal <a href="https://peerj.com/">PeerJ</a>.

--

By Connor Ertz, Earth.com Staff Writer

Source: <a href="https://www.fieldmuseum.org/">Field Museum</a>

Image Credit: © Rüdiger Bieler, The Field Museum

Spiderman worm-snails discovered on shipwreck in the Florida Keys

Scientists have announced the discovery of a new species 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

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Kainji Lake, a reservoir on the Niger River.



In 1968, Kainji Lake was created by the construction of the Kainji Dam. The Niger River, the third longest in Africa, enters the lake in the north.&nbsp;



According to <a href="https://www.earth.com/news/rivers-in-the-american-west-are-a-lifesaving-resource-for-birds/">ESA</a>, the creation of the lake submerged Foge Island and the town of Bussa and permanently flooded other riverine settlements, leaving around 50,000 people displaced.&nbsp;



Large parts of Foge Island are temporarily exposed during low water tides, and the land is often used by migrating fishermen. Kainji Dam is a dam across the Niger River in Niger State of Central Nigeria. 



Wild mammals occur at relatively low densities due to illegal hunting. Lake Kainji has suffered a dramatic decline as a fishery due to the high numbers of artisanal and subsistence fisherfolk using the lake. It has been suggested that a period of closure, together with controlled fishing rights may help improve fish stocks.



Kainji Lake National Park is the oldest of its kind in Nigeria. The park contains three distinct areas: a part of the Kainji Lake, the Borgu Game Reserve to the west of the lake, and the Zugurma Game Reserve to the southeast. The park is home to around 65 mammal species, 350 bird species, and 30 species of reptiles and amphibians. 



Video/ Image Credit: European Space Agency&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.

Kainji Lake in north central Nigeria

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Today’s Video of the Day from <a href="https://www.igb.illinois.edu/">Carl R. Woese Institute for Genomic Biology</a> reveals how scientists can modify common crops like soybean, rice, and wheat to protect them from heat stress.



“We need to double crop production by 2050 to feed a growing global population, and not only are we not on track to do that, but climate change is further complicating things,” said Amanda Cavanagh, a lecturer at the University of Essex. 



The study is part of Realizing Increased Photosynthetic Efficiency (RIPE), an international research project that aims to develop food crops that turn the sun’s energy into food more efficiently.



“Using an engineering approach we designed multiple alternative metabolic pathways to photorespiration. Testing them in the field showed increases in productivity which led Amanda to significantly move the project forward by showing our engineered plants can withstand pretty extreme temperature stress,” said study co-author and RIPE researcher Paul South.&nbsp;



“As the climate changes and temperature stresses increase the pressure on our global food supply, farmers will need every tool available including engineering approaches like the synthetic biology used here to maintain safe and productive harvests.”



The experts tested plants modified to have more efficient photorespiration to see if they were better adapted to warmer temperatures.&nbsp;



The team found that the engineered plants produced 26 percent more biomass than the wild-type plants exposed to the same temperatures, and had 15 percent less yield loss under the higher temperatures.



Video Credit: Amanda Nguyen/University of Illinois



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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.

Designing crops that can beat the heat

[sendtonews key="QGPzYnXEtN-1712599-12187" type="single"] Today’s Video of the Day from Carl...

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



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



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



Video Credit: ACS Reactions



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



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

How does salt makes things taste better?

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



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



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



Video/ Image Credit: ESA



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



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

Santiago, Chile in South America

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

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



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



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



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



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



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



Video Credit: Johns Hopkins&nbsp;



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



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

Interactive map of the universe includes 200,000 galaxies

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes the first comprehensive estimate of carbon density in the Saharan, Sahel, and Sudanian zones of Africa. In an effort to measure the amount of carbon stored across these drylands, a team of scientists used high-resolution satellite images and artificial intelligence to map nearly 10 billion individual trees. 



"The high spatial resolution (50 cm) combined with AI and field measurements used in this study is key to improving tree inventories in drylands," said Pierre Hiernaux, a French researcher working for NASA. "The ever-increasing availability of very high-resolution satellite imagery will make it possible to assess carbon pools and their dynamics at the individual tree level on a global scale."



"This study is exceptional because it is pioneering a type of approach that will revolutionize the monitoring of trees and forests on a global scale: in the short term, it will be possible to map the world's trees from the centre of the Amazon to our schoolyards," said <a href="https://www.inrae.fr/en">INRAE</a> researcher Jean-Pierre Wigneron.



"Many fields of application will become much more efficient and accurate, such as tracking carbon stocks, biodiversity, monitoring logging and protection against illegal forest degradation, in near real time.”



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.

Remote sensing will revolutionize the way we monitor trees

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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://www.nasa.gov/goddard">NASA Goddard</a> features a visual dataset of.methane emissions from wetlands across the globe. Atmospheric methane levels have reached record highs in recent years, and wetlands are a major source of these emissions.&nbsp;



"Methane is an important greenhouse gas that contributes substantially to global warming. On a molecule by molecule basis, methane is much more efficient at trapping heat than carbon dioxide, the main driver of warming," says NASA.



"Though human activities, including agriculture, oil and natural gas production and use, and waste disposal, collectively contribute the majority of methane to the atmosphere, about a third of total methane emissions comes from wetlands."&nbsp;



According to NASA, understanding methane emissions from wetlands and other natural sources is critically important for scientists and policymakers who are working to combat climate change by reducing emissions from human activities.



Video Credit: NASA Goddard



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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.

Wetlands are a major source of methane emissions

[sendtonews key="f8fukm28Vz-2491833-12187" type="single"] Today's Video of the Day from NASA...

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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.stowers.org/">Stowers Institute for Medical Research</a> describes why experts are studying zebrafish to gain a better understanding of how the immune system responds to injury. Zebrafish have the ability to repair and regenerate organs.



“Organ regeneration offers an exciting opportunity for studying the immune system and to inquire why some species can regenerate organs like the heart or missing limbs while others like humans cannot,” explained Dr. Tatjana Piotrowski.



Zebrafish sensory organ hair cells are an ideal system to investigate the pathways and cell types involved in regeneration since they are easily destroyed with antibiotics and begin regenerating within five hours. This enabled the researchers to identify the exact timing and genetic programs for each anti-inflammatory macrophage activation state.&nbsp;



“Our hypothesis is that human macrophages do not receive the proper chemical activation 'cocktail' to instruct pro-regenerative processes,” said Dr. Nicolas Denans. “Identifying the molecular recipe of macrophage activation in zebrafish may one day enable us to design regenerative immunotherapies in humans.”&nbsp;&nbsp;&nbsp;



“The new evidence is a valuable resource for comparative studies on the genetic programs involved in macrophage-mediated repair and regeneration. In other words, different types of injuries may induce different kinds of inflammatory responses. We want to decipher whether this 'language' is universal or if there are a variety of dialects."



Video Credit: Stowers Institute for Medical Research&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.

How the immune system responds to injury

[sendtonews key="0dEcERCq61-2283382-12187" type="single"] Today’s Video of the Day from Stowers...

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes how record-breaking heat expressed itself around the world in 2022.



Scientists have determined that 2022 was the 5th warmest year since 1880. Furthermore, the last nine consecutive years have been the warmest on record.



From devastating floods and wildfires to natural disasters like Hurricane Ian, 2022 showed us yet again how a warming climate affects people across the globe.&nbsp;



"As we look back at 20:22 and years past, we see that each year we better understand the challenges we face and how important it is to meet them," says NASA.



Video/ Image Credit: NASA Goddard



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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.

2022 illustrated the consequences of a warming climate

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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...