Many young adults struggle to put food on the table. What may seem like a temporary hardship could have lasting effects on health. A new study from Northwestern Medicine found that those who experienced food insecurity had a 41% higher chance of developing cardiovascular disease later in life. 



Even after accounting for demographic and socioeconomic <a href="https://www.earth.com/news/tiny-molecule-could-shape-the-future-of-food-security/" target="_blank" rel="noreferrer noopener">differences</a>, the risk remained significant.



Food insecurity affects one in eight households in the U.S. each year. It refers to the struggle to access enough nutritious food to maintain good health. This study confirms that this insecurity plays a direct role in increasing heart disease risk.



<h2 class="wp-block-heading" id="h-food-insecurity-as-a-preventable-risk">Food insecurity as a preventable risk</h2>



“We’ve known that food insecurity and heart disease often go hand in hand, but this study shows, for the first time, that food insecurity comes first,” said Dr. Jenny Jia, an instructor of general internal medicine and preventive medicine at <a href="https://www.nm.org" target="_blank" rel="noreferrer noopener">Northwestern University</a> Feinberg School of Medicine and a Northwestern Medicine internist. 



“That makes it a clear target for prevention — if we address food insecurity early, we may be able to reduce the burden of heart disease later.”



The research suggests that targeting food insecurity could prevent heart disease before it begins. Early intervention may lower future healthcare burdens and improve long-term <a href="https://www.earth.com/news/critical-food-crops-are-threatened-by-rising-temperatures-globally/" target="_blank" rel="noreferrer noopener">health outcomes</a>.



<h2 class="wp-block-heading" id="h-food-access-among-young-adults">Food access among young adults</h2>



The study was focused on data from the Coronary Artery Risk Development in Young Adults (CARDIA) study, which has tracked Black and white U.S. adults since the mid-1980s.



The researchers identified participants who reported food insecurity between 2000 and 2001, then compared their health outcomes over the next 20 years to those with stable food access.



Among the 3,616 participants, those who experienced food insecurity were 41% more likely to develop cardiovascular disease. Over two decades, 11% of food-insecure individuals developed heart disease, compared to only 6% of those who had adequate <a href="https://www.earth.com/news/coal-emissions-threaten-indias-food-security/" target="_blank" rel="noreferrer noopener">food</a> access.



“For a long time, there was this chicken-or-the-egg question - does food insecurity cause heart disease, or does heart disease make food insecurity worse because of the high cost of healthcare?” Jia said.



“By following people over two decades, we were able to show that food insecurity, on its own, significantly increases the risk of developing cardiovascular disease.”



The researchers discovered that people with a lack of food security were more likely to be Black and have lower levels of education compared to those with stable food access. This suggests that food insecurity is not just about access to meals but is also linked to broader social and economic inequalities.



<h2 class="wp-block-heading" id="h-screening-for-food-insecurity">Screening for food insecurity</h2>



Jia noted that these findings highlight the importance of screening for food insecurity in healthcare settings. Identifying inadequate nutrition early and connecting patients with <a href="https://www.earth.com/news/futuristic-food-supply-transforming-co2-into-protein/" target="_blank" rel="noreferrer noopener">resources</a> could help reduce future health risks.



Primary care settings offer an ideal space for screening. “Because there tends to be a lot of trust between primary care providers and patients,” Jia explained. 



She also suggests extending screenings to emergency rooms and specialties like cardiology. “The more we screen for it, the better,” Jia said.



“We need better strategies to help people once they screen positive. Do we connect them to social workers who can refer them to existing community programs? Should healthcare systems develop their own interventions? These are the next big questions.”



Food insecurity screenings can be conducted by internists, pediatricians, family doctors, nurses, and medical assistants. Even self-reported forms could help identify those at risk.



<h2 class="wp-block-heading" id="h-long-term-effects-of-food-insecurity">Long-term effects of food insecurity </h2>



Jia and her team plan to continue monitoring this group to understand the long-term <a href="https://www.earth.com/news/food-waste-crisis-why-u-s-goals-remain-out-of-reach/" target="_blank" rel="noreferrer noopener">consequences</a> of food insecurity.



“It’s surprising to see heart disease in this group, which doesn’t include those 65 or older,” Jia said. “As they near 80, we plan to revisit the study to explore the evolving link to heart disease.”



This study was conducted with support from the U.S. National Heart, Lung, and Blood Institute (<a href="https://www.nhlbi.nih.gov/" target="_blank" rel="noreferrer noopener">NHLBI</a>) in collaboration with institutions such as the University of Alabama at Birmingham, Northwestern University, the University of Minnesota, and the <a href="https://digital.ahrq.gov/organization/kaiser-foundation-research-institute" target="_blank" rel="noreferrer noopener">Kaiser Foundation Research Institute</a>.



The study is published in the journal <a href="https://jamanetwork.com/journals/jamacardiology/article-abstract/2831124" target="_blank" rel="noreferrer noopener">JAMA Cardiology</a>.



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Food insecurity can lead to heart problems later in life

Many young adults struggle to put food on the table. What may seem like a temporary hardship could have lasting effects on health. A new study from Northwestern Medicine found that those who experienced food insecurity had a 41% higher chance of developing cardiovascular disease later in life. Even after accounting for demographic and socioeconomic differences, the risk remained significant. Food insecurity affects one in eight households in the U.S. each year. It refers to the struggle to access enough nutritious food to maintain good health. This...

The largest organ in the human body is the skin, but researchers may have discovered a new organ that’s even bigger. 

A team of researchers from the <a href="https://med.nyu.edu/">New York University School of Medicine </a>happened upon the discovery while studying bile ducts in cancer patients. 

What the researchers found was a vast network of connected fluid-filled compartments held together in a web of collagen and elastin. 

Called the interstitium, it is found all over the body just beneath the top layer of skin and lines the digestive tract, arteries, and lungs. The researchers say that the organ acts as a shock absorber. 

The results were recently published in the Journal Scientific Reports. 

According to the researchers, the interstitium acts as a fluid highway and drains into the lymphatic system. The amount of fluid moving throughout the compartments could also help explain how water in the body is dispersed. 

“You're talking about the remaining extracellular fluid that's unaccounted for,” said Neil Theise, the co-senior author of the study in an interview with <a href="https://news.nationalgeographic.com/2018/03/interstitium-fluid-cells-organ-found-cancer-spd/">National Geographic.</a>

Scientists have long known that the <a href="https://www.earth.com/news/body-temperature-obesity/">human body</a> is made up of 70 percent water, two-thirds of which is found in the cells. Where the remaining fluid originates in the body has not been well understood until now. 

The reason the interstitium has gone undetected for so long is that traditional methods of examining tissue samples under a microscope drained the interstitium’s compartments leaving it flat. 

Studying a tissue sample involves treating thinly sliced tissue with chemicals. The chemicals dye certain features in the tissue but drain away all fluid. Theise and his colleagues happened across their discovery by looking at live tissue samples. 

“This fixation artifact of collapse has made a fluid-filled tissue type throughout the body appear solid in biopsy slides for decades, and our results correct for this to expand the anatomy of most tissues,” said Theise. “This finding has potential to drive dramatic advances in medicine, including the possibility that the direct sampling of interstitial fluid may become a powerful diagnostic tool.”

[caption id="attachment_1177873" align="aligncenter" width="780"]<a href="https://www.earth.com/wp-content/uploads/2018/03/new-organ.jpg"><img class="size-full wp-image-1177873" src="https://www.earth.com/wp-content/uploads/2018/03/new-organ.jpg" alt="" width="780" height="438" /></a> Image Credit: Jill Gregory/Mount Sinai Health System[/caption]

First, the researchers used a new technology that allows scientists to view living tissues with a camera probe. 

The research team was originally studying the spread of cancer in the bile duct of several patients, but in doing so the team noticed a connective web of cavities. Upon further inspection, this web of fluid-filled compartments was found all over the body. 

The new discovery is exciting with a lot of promising implications for furthering our understanding of the human body. 

However, because it is such a radical finding, future studies will need to be conducted before the interstitium is officially recognized as a new organ. 

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>, <a href="https://www.earth.com/">Earth.com</a> Staff Writer

Newly discovered organ may be the largest in the human body

The largest organ in the human body is the skin,...

Woman Eating A Burger

Frequently eating out or grabbing something on the go increases your risk of exposure to potentially harmful levels of chemicals called phthalates, according to a new study. 

Phthalates are common in food packaging and processing materials such as to-go boxes, sandwich wrappers, and even the rubber gloves used for food handling. 

These chemicals have been associated with a wide range of health-problems, particularly affecting hormones. 

Researchers from the <a href="http://sph.berkeley.edu/">University of California, Berkeley, School of Public Health</a> and the <a href="https://publichealth.gwu.edu/">Milken Institute School of Public Health </a>compared levels of phthalates of people who reported eating out alot to those who preferred to eat at home. 

The results were published in the journal Environment International. 

“This study suggests food prepared at home is less likely to contain high levels of phthalates, chemicals linked to fertility problems, pregnancy complications, and other health issues,” said Ami Zota, the senior author of the study. “Our findings suggest that dining out may be an important, and previously under-recognized source of exposure to phthalates for the U.S. population.” 

The researchers collected data from the <a href="https://www.cdc.gov/nchs/nhanes/index.htm">National Health and Nutrition Examination Survey</a> (NHANES) between 2005 and 2014. 

There were 10,253 participants in the study who were asked to remember what they ate and where their <a href="https://www.earth.com/news/filters-smoked-food-safer/">food</a> came from in the previous 24 hours. 

Once the data from the NHANES had been gathered and examined, the researchers made connections between the food that was consumed and the levels of phthalates found in the participants’ urine samples. 

The researchers found that those who had eaten out, particularly adolescents, had higher levels of phthalates. 

The results also showed that certain foods had higher levels than others in restaurants and fast food places. 

To limit your exposure to phthalates, the researchers suggest cooking more meals at home and buying food from the grocery store.

The study is a cause for concern as the researchers say two-thirds of the U.S population eats out every day, and future research is needed in order to find effective ways to remove the risk of phthalate exposure. 

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette,</a> <a href="https://www.earth.com/">Earth.com </a>Staff Writer

Image Credit: The Milken Institute School of Public Health

Eating out increases your risk of exposure to harmful chemicals

Frequently eating out or grabbing something on the go increases...

According to previous research, during the last ice age, humans migrated from Asia across a former land bridge to <a href="https://www.earth.com/news/more-snow-north-america/">North America</a>. While making this move almost 12,000 years ago, they reached what is now the west coast of British Columbia, Canada, as well as coastal regions to the south. Unfortunately, much of this shoreline is now covered in dense forest and is only accessible by boat, which makes it tough for archaeologists to dig up evidence that supports this research.

However, a new study published in the open-access journal <a href="http://journals.plos.org/plosone/">PLOS ONE</a> by Duncan McLaren and colleagues from the <a href="https://www.hakai.org/">Hakai Institute</a> <a href="https://www.uvic.ca/">and University of Victoria</a>, Canada, details the discovery of human footprints found off the Pacific coast of Canada, which could be 13,000 years old.

[caption id="attachment_1177854" align="aligncenter" width="996"]<a href="https://www.earth.com/wp-content/uploads/2018/03/canada-footprints.jpg"><img class="wp-image-1177854 size-large" src="https://www.earth.com/wp-content/uploads/2018/03/canada-footprints-1024x832.jpg" alt="" width="996" height="809" /></a> Image Credit: Duncan McLaren[/caption]

For the study, the researchers excavated intertidal beach sediments along the shoreline of Calvert Island, British Columbia. In this area, the sea level is two to three meters lower than it was at the end of the last ice age. The researchers found 29 human footprints of at least three varying sizes in the sediment. Using radiocarbon dating, the team estimated the footprints to be roughly 13,000 years old. Through measurements and digital photographic analysis, they determined that the footprints likely belonged to two adults and a child, all of whom were barefoot.

This discovery indicates that humans were likely present on the west coast of British Columbia about 13,000 years ago – while the region was emerging from the last ice age. The research adds to a growing body of evidence that supports the hypothesis of humans using a coastal route to migrate from Asia to North America during the most recent ice age. 

The study’s authors believe that further excavations using more advanced methods would likely uncover even more human footprints around this area, and these discoveries would serve to help us better understand the patterns of early human settlement along the coast of North America.

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

13,000-year old footprints discovered of Pacific coast of Canada

According to previous research, during the last ice age, humans...

A research team at <a href="https://www.cmu.edu/">Carnegie Mellon University</a> has developed a strategy to help people avoid feeling <a href="https://www.earth.com/news/27-different-human-emotions/">awkward</a> in everyday circumstances. The scientists are reporting that embarrassment can be prevented altogether if you train your mind to think of yourself as merely an observer rather than a participant in uncomfortable situations.

According to the experts, an unnecessary fear of humiliation often holds us back from seeking advice on certain topics and causes us to dodge certain situations. The researchers pointed out that failure to get help can sometimes have serious consequences, particularly when an individual is dealing with a medical issue.

“Embarrassment prevents us from asking advice about what we should do, for example, about our mounting mortgage bills or unplanned pregnancies,” said study lead author Li Jiang. “In many cases, if we are to help ourselves, and others, we must overcome our fear of embarrassment in social situations.”

Study participants watched videos of people in various awkward situations, such as getting tested for sexually transmitted diseases or accidentally passing gas in front of a love interest, and they were asked to describe how it made them feel.

Individuals who were the most self-conscious actually felt humiliated by just watching the videos. However, when these participants perceived themselves as being merely observers instead of being involved in the scenario, their levels of self-consciousness dropped.

“Our research shows that devising strategies to successfully reduce embarrassment avoidance is complicated,” said Jiang. “This is because consumers will react differently to persuasion tactics depending on their level of public self-consciousness and their amount of available cognitive resources.”

Jiang explained that many products, such as laundry and dish detergent, are advertised to consumers as a way to avoid embarrassment.

“Our research is relevant to those situations in which marketers want to inoculate consumers against a fear of embarrassment and encourage them to take actions they might otherwise avoid.”

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

How to eliminate embarrassment as an emotional option

A research team at Carnegie Mellon University has developed a...

A new study has found that high tides are flooding roadways much more frequently along the eastern coast of the United States. Researchers are reporting that coastal roads in this region have experienced a 90 percent increase in flooding over the last 20 years.

Study co-author Jennifer Jacobs is a professor of Civil and Environmental Engineering at the <a href="https://www.unh.edu/">University of New Hampshire</a>.

“This could be just the beginning of impact on these areas,” said Jacobs. “With the continued rise in sea levels, nuisance-flood frequency is projected to grow and the effect on the physical roads and the people that live along the coastline is concerning.”

According to the study, high tide floods threaten over 7,500 miles of roadways along the entire <a href="https://www.earth.com/news/coast-cities-reduced-emissions/">East Coast</a>, including over 400 miles of interstate. The researchers have estimated that this flooding causes drivers over 100 million hours of delays each year. By 2100, that number is expected to rise to over 3.4 billion hours.

The study also revealed that high tide flooding could occur almost daily at certain sites along the coast of New Jersey, Maryland, Connecticut, North Carolina, Florida and the District of Columbia by the middle of this century. This trajectory is based on intermediate levels of sea rise.

“As tidal coastal flooding increases in the coming years, there will also be issues with the transportation infrastructure,” said Jacobs. “We've already seen billions of dollars in damage to coastal roadways from recent hurricanes. In the future, with rising sea levels, we expect to see more frequent issues, more damage, and impact to roadways even farther inland.”

The researchers pointed out that critical transportation infrastructure is at risk from sea level rise alone, which is projected to swell up somewhere between one and eight feet along the Atlantic and Gulf Coasts of the United States.

The study is published in the journal <a href="http://trrjournalonline.trb.org/">Transportation Research Record</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Image Credit: Melissa Paly

Coastal roads flooding far more frequently in the eastern U.S.

A new study has found that high tides are flooding...

Researchers at the <a href="http://www.uchile.cl/english">University of Chile</a> have had a breakthrough that could ultimately lead to a cure for alcoholism. When the experts injected human stem cells into mice that had become binge drinkers, the animals cut their <a href="https://www.earth.com/news/marijuana-less-damaging-alcohol/">alcohol</a> intake by as much as 90 percent within two days.

A team of scientists led by Yedy Israel fed study rats a diet of unlimited heavy alcohol until they became dependent upon it. The animals were drinking the equivalent of a bottle of vodka each day until the researchers took the alcohol away for two weeks.

In an interview with <a href="https://www.researchgate.net/">ResearchGate</a>, Israel explained:

“At the end of this period, they were given alcohol for only 60 minutes a day. Typically, the animals would engage in binge-like drinking during this short period, consuming the human equivalent of about eight standard drinks.”

On the other hand, animals that received human stem cell injections consumed far fewer drinks compared to those who were left untreated. Israel explained that the alcohol intake of the treated mice dropped to levels that would be considered social drinking.

In fact, within 48 hours of treatment, the mice were drinking 90 percent less alcohol. While the control mice went right back to heavy alcohol intake, the study mice showed no signs of a relapse for the next four weeks.

The cells used in the experiment, mesenchymal stem cells, are found in human fat tissue and are known to have strong immunosuppressive properties.

Mesenchymal stem cells have the ability to stop the production of reactive oxygen species (ROS) that are created in binge drinkers. These molecules damage neurons in the brain and promote alcoholism.

Even though issues related to alcoholism are much more complex in humans compared to mice, the researchers hope that the stem cell treatments will have a similar effect on people. They are currently developing human trials which will begin soon.

The study is published in the journal <a href="http://www.nature.com/srep/">Scientific Reports</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Stem cell injections have the potential to cure alcoholism

Researchers at the University of Chile have had a breakthrough...

A team of researchers has found that information and computer technologies (ICT) are making a surprisingly large contribution to carbon dioxide emissions. Professor Lotfi Belkhir of <a href="https://www.mcmaster.ca/">McMaster University</a> is urging for the issue to be addressed right away.

The researchers conducted a comprehensive analysis of tech devices and the infrastructure associated with them such as data centers. Professor Belkhir published an article in <a href="http://theconversation.com/au">The Conversation</a> to share the study findings and create awareness of this growing problem. 

“We found that the relative contribution of ICT to the total global footprint is expected to grow from about one percent in 2007 to 3.5 percent by 2020 and reach 14 percent by 2040,” wrote Professor Belkhir.

The investigation revealed that <a href="https://www.earth.com/news/addiction-smartphones-imbalances-brain/">smartphones</a> have a much more significant impact than that of of PCs, laptops, and computer monitors. Between 2010 and 2020, the emissions generated by smartphones will jump from 4 to 11 percent.

“In absolute values, emissions caused by smartphones will jump from 17 to 125 megatons of CO2 equivalent per year (Mt-CO2e/yr) in that time span, or a 730 percent growth,” explained Professor Belkhir.

The rise in harmful emissions from smartphones will primarily come from their production and not their use, according to the study. The infrastructure used to provide data services, however, will also make a substantial contribution to carbon dioxide emissions.

“For every text message, video download, photo exchange, email or chat, there’s a 24/7 power-hungry server in some data center that’s making it happen,” wrote Professor Belkhir.

He pointed out that software companies like Google, Facebook, Amazon, Microsoft and Yahoo are ultimately driving the growth of ICT and related infrastructure.

“At the societal level, we must demand that all data centers run exclusively on renewable energy,” Belkhir concluded in the article.

“At the individual level: Hold on to your smartphone for as long as you can, and, when you do upgrade, make sure you recycle your old one. Sadly, only one percent of smartphones are being recycled today.”

The study is published in the <a href="https://www.journals.elsevier.com/journal-of-cleaner-production/">Journal of Cleaner Production</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Smartphones drive more carbon emissions than other devices

A team of researchers has found that information and computer...

Researchers at <a href="https://wayne.edu/">Wayne State University</a> have found evidence to confirm that stress can impact the brain of an unborn child. For the first time ever, experts have shown how brain development is altered in fetuses whose mothers experience high levels of stress and anxiety during pregnancy.

“The major thrill is that we have demonstrated what has long been theorized, but not yet observed in a human, which is that the stress of a mother during her pregnancy is reflected in connectional properties of her child's developing brain,” said lead author Moriah Thomason.

The study was facilitated by new scanning techniques which enabled the researchers to analyze the brain activity of dozens of fetuses at 30 and 37 weeks gestation. 

The scans revealed significant changes in the cerebellum, which is the brain’s stress response region, that emerged almost immediately as the <a href="https://www.earth.com/news/coffee-cannabis-brain-health/">brain</a> began to develop.

“It has long been thought that the stress of a mother during her pregnancy may imprint on the brain of her developing child,” said Thomason.

“Despite the clear importance of this time frame, we presently possess very little understanding of how functional macroscale neural networks build during this precious time in human life, or the relevance of this to future human health and development.”

The pregnant study participants all came from high-stress situations, with many of them reporting high levels of anxiety and depression. Thomason explained that the women were eager to participate in the study to help other women like themselves, and not simply out of concerns about their pregnancy.

Beyond health implications, the results of the study indicate that complex functions in the brain such as stress response develop earlier than what was previously thought.

“We must consider the developing brain in context, thinking about the role of the environment in shaping the brain,” said Thomason. “It is a topic that inspires us to promote healthy brain growth, to ask what it is that we do for children in the lifestyles, opportunities, and learning conditions we create for them.”

The research was presented at the 25th annual meeting of the <a href="https://www.cogneurosociety.org/">Cognitive Neuroscience Society</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Stress during pregnancy affects the baby’s brain, study confirms

Researchers at Wayne State University have found evidence to confirm...

Two major developments happening now in the motor vehicle industry involve the rise of <a href="https://www.earth.com/news/self-driving-cars-sensors/">self-driving cars</a> and the push towards electric cars. Both technological advancements aim to increase efficiency – electric cars would make vehicles more fuel efficient, while self-driving cars could decrease motor vehicle accidents and aid with everything from shipping products to moving people.

Currently, electric vehicles make up less than one percent of new car sales. This is mainly attributed to slow charging capabilities, high prices, and limited travel ranges. Furthermore, self-driving cars still emit a significant amount of greenhouse gasses, and also have a major sticker price. But a recent study published in the American Chemical <a href="https://pubs.acs.org/toc/esthag/0/0">Society’s Environmental Science &amp; Technology</a> used a mathematical model to determine that self-driving, electric taxis may be able to reduce emissions, energy use, and overall costs.

Researchers Gordon Bauer, Jeffery Greenblatt and Brian Gerke developed a mathematical model in order to test the cost and capabilities of a fleet of shared, automated electric vehicles in New York City. They varied the types of vehicles used and charging infrastructure parameters, identifying which options cost the least amount of money and have the greatest impact on energy and greenhouse gas emission reductions. 

The results showed that roughly 6,500 vehicles with a battery range of 70 miles or more could be sustained on 1,500 medium-power electric vehicle chargers across Manhattan. These electric vehicles would produce about 33,000 tons of carbon dioxide per year. This would be a 57 percent reduction compared to a hybrid vehicle fleet, and a 73 percent reduction over an automated gasoline-powered car fleet. Furthermore, shared vehicles – especially self-driving electric ones – could place the up-front cost and burden on the taxi fleet operator, mitigating the cost of the relatively pricey automated vehicles.

Overall, the study’s results suggest that electric vehicles could reduce operating costs by as much as 18 percent, and energy consumption by up to 55 percent when compared to a fleet of hybrid or gasoline vehicles. However, the researchers do state that this model might be more difficult to apply to less dense regions, saying the more research needs to be done on this subject.

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Self-driving electric taxis can cut both emissions and costs

Two major developments happening now in the motor vehicle industry...

Everyone has what it takes to be a hero given the right set of circumstances, according to a new study. 

Researchers from <a href="https://www.osu.edu/">Ohio State University</a> and <a href="https://www2.calstate.edu/">California State University</a>, Sacramento found that contrary to previous research, heroism is not determined by personality but by a large set of extenuating circumstances including social setting, religious preferences, and family history. 

The study was published online in the journal Social Forces and examined heroism among the Hutu in <a href="https://www.earth.com/image/fires-in-rwandas-kagera-national-park/">Rwanda</a> who rescued or harbored persecuted Tutsi from genocidal violence in 1994. 

At first, the researchers set out to find links between personality and courage, but after conducting in-depth interviews with the Hutu, they found that heroism is a largely social effort. 

“We started this study thinking we would identify the individual characteristics that motivated rescuers, because that's what most previous research had pointed to,”  said Hollie Nyseth Brehm, a co-author of the study. “But we realized very quickly that most people who rescued weren't doing this alone. It was a form of collective action. The social dynamics and situational context were key factors in determining whether someone decided to rescue.”

The researchers also found that even those who did rescue the Tutsi could not be classified as heroes because there were Hutu who murdered some Tutsi but saved others.

This is why it’s important to understand what factors motivate a person’s actions. 

The researchers conducted one to two interviews with 35 Hutu who said they had saved at least one Tutsi during the genocidal violence of 1994. Data from an earlier survey of 273 rescuers conducted for another study was also used in the research.  

The results showed that three major factors influenced the choice of whether or not to save the Tutsi: biographical availability, socialization, and situational context. 

Biographical availability involves the specific circumstances that allowed a person to rescue a Tutsi. For example, older, wealthier Hutu were more likely to rescue the Tutsi than those who did not have the influence or socioeconomic status of other Rwandans. 

Family history and religious affiliation also influenced heroism. In the interviews some individuals recalled their family members rescuing Tutsi during similar periods of violence earlier on. 

This gave some Hutu the motivation and courage to follow in their family’s footsteps. 

Another factor was whether or not someone had personal ties to the Tutsi as some of the rescuers specifically helped someone they knew.

All in all, the results show that there are certain factors that go into an act of heroism. The context of the situation at hand, the social dynamics at work, family history, and even religious affiliation are all drivers behind heroism. 

“These results suggest that nearly anyone can engage in heroic deeds,” said Brehm. “You may not need a certain personality type, as long as you have the right network of friends and family and a support system that can help you.”

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>,<a href="https://www.earth.com/"> Earth.com</a> Staff Writer

It takes a village and the right circumstances to make a hero

Everyone has what it takes to be a hero given...

Land degradation caused by human activities is pushing the planet towards a sixth mass species extinction, according to a recent report.

It is one of the main causes of species loss and at the current rates of land use, two-fifths of the world’s population is at risk.

Intensifying <a href="https://www.earth.com/news/humans-driving-climate-change/">climate change</a> could force the mass migration of millions of people, creating conflict, food shortages, and habitat loss, according to the report.

The three-year assessment report was conducted by over 100 leading experts from 45 different countries and shows the costly economic and environmental toll of land degradation.

The report was produced by the <a href="https://www.ipbes.net/">Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services</a>, and was a collaborative effort that drew on more than 3,000 scientific, government, indigenous and local knowledge sources.

The conclusions of the assessment show that land restoration should be a priority as worsening land degradation threatens the well being of billions of people.

“Avoiding, reducing and reversing this problem, and restoring degraded land, is an urgent priority to protect the biodiversity and ecosystem services vital to all life on Earth and to ensure human well-being,” said Robert Scholes, a co-chair of the assessment.

A rapid, yet largely unsustainable expansion of croplands and grazing areas is the biggest driver of land degradation worldwide.

According to the report, the threat to food security and biodiversity has reached critical levels in some regions.

The report also notes that humanity’s high-consumption lifestyles in developed economies coupled with rising consumption in developing and emerging economies are major motivators behind land degradation.

As the world’s population increases, the costs of land degradation will only get worse.

“In just over three decades from now, an estimated 4 billion people will live in drylands,” Scholes. “By then it is likely that land degradation, together with the closely related problems of climate change, will have forced 50-700 million people to migrate. Decreasing land productivity also makes societies more vulnerable to social instability -- particularly in dryland areas, where years with extremely low rainfall have been associated with an increase of up to 45% in violent conflict.”

The assessment emphasizes the need for land restoration which will become critical in the coming years. There have been many examples of successful land restoration in every ecosystem and well-tested practices and techniques.

The key then becomes implementing these practices on a wide-scale. The assessment also found that the benefits of restoration are ten times higher than the costs, just further proof that land restoration should be a priority. 

These benefits include more employment opportunities, improved quality of life, and better business spending.

“Fully deploying the toolbox of proven ways to stop and reverse land degradation is not only vital to ensure food security, reduce climate change and protect biodiversity," said Luca Montanarella, the fellow assessment co-chair.  “It's also economically prudent and increasingly urgent.

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>,<a href="https://www.earth.com/"> Earth.com</a> Staff Writer

Image Credit: Blanscape/Shutterstock

Global land degradation could displace millions in the future

Land degradation caused by human activities is pushing the planet...

A new study from the <a href="https://www.nmbu.no/en">Norwegian University of Life Sciences </a>has revealed that human activities have altered the natural behavior of the Scandinavian brown bear. Hunting pressure has not only changed the way a mother cares for her cubs, but has also changed how often she reproduces.

“Generally, the cubs have followed their mother for a year and a half,” said co-author Professor Jon Swenson. “Only rarely have we observed them to follow her for two and a half years.”

Compared to 15 years ago, many more cubs now stay with their mothers for an additional year. “Man is now an evolutionary force in the lives of the bears,” said Professor Swenson.

Norwegian and Swedish researchers have been closely tracking the Scandinavian brown bear since 1984. Professor Swenson has been involved with the research since almost the very beginning.

“The Scandinavian brown bear project is one of the world's two longest research projects on bears,” he explained. “We have followed over five hundred bears, many from birth to death.”

Since the project was launched, the number of bears shot and killed in Sweden has been on a steady rise. Between 2010 and 2014, approximately 300 bears were killed by Swedish <a href="https://www.earth.com/news/ancient-alaskan-hunters-advanced/">hunters</a> every year. 

The number of female bears keeping their cubs around for an additional year increased from 7 to 36 percent between 2005 and 2015. 

Most countries that allow bear hunting prohibit the killing of families. By keeping her cubs around her, the mother bear has a better chance of survival.

“A single female in Sweden is four times more likely to be shot as one with a cub,” said Professor Swenson.


On the other hand, females who keep their cubs until they are two and a half reproduce less often.

“In an evolutionary perspective, this would not be beneficial,” said Professor Swenson. “The animals with the most offspring ‘win’ nature's race.”

However, the results of the study revealed that the longer lives of females balanced out a lower birth rate, particularly in areas with high hunting pressure.

The study is published in the journal <a href="https://www.nature.com/ncomms/">Nature Communications </a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Hunting pressure has changed how bears raise their young

A new study from the Norwegian University of Life Sciences...

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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



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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



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



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



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



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



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



Video Credit: ESA&nbsp;&nbsp;



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



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

Lesotho: Africa's "Kingdom in the Sky"

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



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



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



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



Video Credit: ESA&nbsp;



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



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

The city of Dublin on Ireland's east coast

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



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



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



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



Video/ Image Credit: ESA



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



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

The province of Zaragoza in northeast Spain

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



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



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



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



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



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



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



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



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



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



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The rapid retreat of the Columbia Glacier

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



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



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



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



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



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



Video &amp; Image Credit: ESA



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



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

The Pyrenees Mountains in southwest Europe

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Earth,Like,Exoplanet,3d,Render

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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"

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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



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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

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