The fight against pain may have a new player in its ranks - gender. The findings from a recent study indicate that men and women resort to different biological mechanisms for pain relief. But what does this mean?



A team of researchers at the <a href="https://ucsd.edu/" target="_blank" rel="noreferrer noopener">University of California San Diego</a> School of Medicine has unmasked an intriguing reality - pain management is not a one-size-fits-all solution. 



The way <a href="https://www.earth.com/news/why-men-and-women-react-differently-to-stress/" target="_blank" rel="noreferrer noopener">men and women</a> experience and combat pain varies significantly, pointing to key biological differences in their responses.



<h2 class="wp-block-heading" id="h-gender-differences-in-pain-management">Gender differences in pain management </h2>



Men tend to rely on the release of endogenous opioids, which are the body's natural <a href="https://www.earth.com/news/scientists-learn-how-to-activate-the-bodys-natural-pain-killers/" target="_blank" rel="noreferrer noopener">pain relievers</a>. These substances act similarly to prescription opioids like morphine, binding to opioid receptors in the brain to dampen the perception of pain. 



In contrast, women appear to utilize alternative, non-opioid pathways. These channels bypass the body's opioid system entirely, meaning that the pain relief mechanisms at play in women may be less reliant on the body’s internal opioids.



This finding suggests there is a biological reason for why women might not respond as well to opioid-based treatments.



The research highlights a major distinction in how pain relief strategies should be tailored based on gender, potentially altering the way we approach pain management altogether.



<h2 class="wp-block-heading" id="h-opioids-may-not-help-women-in-pain">Opioids may not help women in pain</h2>



Powerful synthetic <a href="https://www.earth.com/news/brain-discovery-offers-hope-for-tackling-opioid-addiction/" target="_blank" rel="noreferrer noopener">opioid</a> drugs such as morphine and fentanyl are the leading painkillers at our disposal today. 



By adhering to the same receptors as endogenous opioids, these synthetic molecules pack a potent punch. However, this characteristic also primes them for a high risk of addiction.



One of the profound peculiarities of opioid therapy is the subpar response exhibited by women. 



"Dependence develops because people start taking more opioids when their original dosage stops working," explained Dr. Fadel Zeidan, an expert at the UC San Diego Sanford Institute for Empathy and Compassion.



"Although speculative, our findings suggest that maybe one reason that females are more likely to become addicted to opioids is that they’re biologically less responsive to them and need to take more to experience any pain relief.”



<h2 class="wp-block-heading" id="h-a-new-approach-to-pain-management">A new approach to pain management </h2>



The research was based on data from two clinical trials consisting of 98 participants, including healthy individuals and chronic lower back pain sufferers.



According to Dr. Zeidan, the results underscore the need for more sex-specific pain <a href="https://www.earth.com/news/music-therapy-can-reduce-pain-stress-and-anxiety/" target="_blank" rel="noreferrer noopener">therapies</a>, because many of the treatments we use do not work nearly as well for women as they do for men.



The implications of the study are immense. For one, the findings could revolutionize the way we approach pain management.



Tailoring treatment to an individual’s gender could improve patient outcomes and decrease opioid reliance and misuse. 



After all, it is clear disparities exist in pain management between genders, and these results provide the first tangible evidence that sex-based differences in pain processing need to be considered more seriously when developing and prescribing treatment for pain.



<h2 class="wp-block-heading" id="h-pain-treatment-for-women">Pain treatment for women </h2>



This research highlights a crucial issue that's been overlooked in healthcare - how men and women experience pain differently. Traditionally, pain treatments have followed a standardized approach, but this study suggests a shift in thinking is needed.



If men and women utilize different biological pathways for pain relief, it stands to reason they might need distinct treatments. The findings also explain why women have a greater prevalence of chronic pain. 



For women, who appear less responsive to opioids, exploring alternative methods that align with their unique pain pathways becomes important. Options like anti-inflammatory drugs, nerve blockers, or innovative approaches like mindfulness-based <a href="https://www.earth.com/news/mindfulness-meditation-is-a-powerful-weapon-against-chronic-pain/" target="_blank" rel="noreferrer noopener">pain management</a> could offer better results.



Furthermore, the study points out a pressing concern: women might face a higher risk of opioid addiction due to the need for larger doses to achieve pain relief. This insight could shed light on the alarming rates of opioid misuse among women. 



As we move forward, it's evident that doctors will need to carefully consider painkiller prescriptions, possibly adopting gender-specific guidelines to safeguard women from the risks of dependency.



The study is published in the journal <a href="https://academic.oup.com/pnasnexus/advance-article/doi/10.1093/pnasnexus/pgae453/7821498" target="_blank" rel="noreferrer noopener">PNAS Nexus</a>.



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Why women experience more chronic pain than men

The fight against pain may have a new player in its ranks - gender. The findings from a recent study indicate that men and women resort to different biological mechanisms for pain relief. But what does this mean? A team of researchers at the University of California San Diego School of Medicine has unmasked an intriguing reality - pain management is not a one-size-fits-all solution. The way men and women experience and combat pain varies significantly, pointing to key biological differences in their responses. Gender differences in...

Climate change will affect fertility differently in wealthy and poor countries. An international team of researchers has determined that the economic effects of <a href="http://www.earth.com/news/arctic-warming-cost-trillions/">climate change</a> will have a substantial impact on fertility. The experts predict that many people will re-evaluate how much time and money they should dedicate to raising children as resources become more limited. 

The study examined the economic channels through which climate change could affect fertility, including the gender wage gap, longevity, and mortality. 

The team used a quantitative model that combined standard economic-demographic theory with projections of how climate change will impact the economy. The model, which focused on Colombia and Switzerland, was designed to analyze how these impacts may vary between wealthy and poor countries.

In the model, parents must decide how to divide limited resources between supporting current family needs, having children, and paying for each child's education. 

“Increases in global temperature affect agricultural and non-agricultural sectors differently. Near the equator, where many poorer countries are, climate change has a larger negative effect on agriculture,” said study lead author Dr. Gregory Casey of <a href="https://www.williams.edu/">Williams College</a>.

“This leads to scarcity of agricultural goods, higher agricultural prices and wages and ultimately, a labour reallocation. Because agriculture makes less use of skilled labor, our model showed that climate change decreases the return on acquiring skills, leading parents to invest fewer resources in the education of each child, and to increase fertility.”

On the other hand, these patterns were found to be reversed at higher latitudes.

“Our model suggests climate change may worsen inequalities by reducing fertility and increasing education in richer northern countries, while increasing fertility and reducing education in tropical countries,” said study co-author Dr. Soheil Shayegh. “This is particularly poignant, because those richer countries have disproportionately benefited from the natural resource use that has driven climate change.”

“Our model only deals with a single economic channel, so it is not intended to give a complete quantitative account of the impact of climate change on demographic outcomes,” concluded Dr. Casey. “Further work is needed on other economic channels, especially those related to health.”

The study is published in the journal <a href="https://iopscience.iop.org/erl">Environmental Research Letters</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Paid for by <a href="http://earth.com">Earth.com</a>

Climate change will affect fertility differently in wealthy and poor countries

Climate change will affect fertility differently in wealthy and poor...

An international team of researchers has found that online behavior mimics the natural rhythms of the real world. In particular, the experts discovered that online interest in plants and animals often changes with the <a href="http://www.earth.com/news/infectious-diseases-seasonal/">seasons</a>. 

The study was focused on a massive dataset of 2.33 billion views on Wikipedia, which involved 31,715 species over the course of three years. The team identified seasonal trends in the page views of more than 25 percent of the plant and animal species. The timing and extent of this internet activity was found to be an accurate representation of when and where the species were present in the world.

The seasonal interest in Wikipedia pages was found to reflect seasonal patterns in the species themselves. For example, page views of flowering plants had stronger seasonal patterns than those for coniferous trees, which do not have an obvious flowering season. Insects and birds trended more by the season compared to most mammals.

The researchers also identified instances where seasonal patterns responded to cultural events. Wikipedia’s page for the wild turkey showed repeated annual spikes around Thanksgiving and during the dates of the spring hunting season.

“People are becoming increasingly detached from nature and as a result we didn't really expect their activity online to respond to patterns in the natural world,” said study lead author John Mittermeier, who is a PhD student at the <a href="http://www.ox.ac.uk/">University of Oxford</a>. “To see that online activity often correlates strongly with natural phenomena suggests that people are paying attention to the world around them, and from a conservation perspective that is really exciting.”

Professor Richard Grenyer added, “Really widespread, accurate monitoring of all the world's species is still science fiction, unfortunately. But by using these big data approaches we can begin to shortcut some of the more difficult problems, and cut to the core questions in modern conservation: how is the world changing, for which species is it changing the most, and where are the people who care the most and can do the most to help.”

The study is published in the journal <a href="https://journals.plos.org/plosbiology/">PLOS Biology</a>.

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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Image Credit: Uri Roll

Public interest in plants and animals changes with the seasons

An international team of researchers has found that online behavior...

A new study from the <a href="https://www.acc.org/">American College of Cardiology</a> has revealed that <a href="http://www.earth.com/news/sleep-deprivation-public-health-crisis/">napping</a> may be more important to our health than what was previously realized. The experts discovered that individuals who took a nap in the middle of the day experienced a significant drop in blood pressure compared with those who did not take a nap.

Study co-author Dr. Manolis Kallistratos is a cardiologist at the Asklepieion General Hospital in Voula, Greece.

“Midday sleep appears to lower blood pressure levels at the same magnitude as other lifestyle changes. For example, salt and alcohol reduction can bring blood pressure levels down by 3 to 5 mm Hg.” Dr. Kallistratos explained that a low-dose antihypertensive medication usually lowers blood pressure levels by an average of 5 to 7 mm Hg.

The study revealed that taking a nap during the day was associated with an average 5 mm Hg drop in blood pressure. According to the researchers, this is the equivalent of what would be expected from other treatments to lower blood pressure. In addition, for every 60 minutes of midday sleep, 24-hour systolic blood pressure decreased by 3 mm Hg.

“These findings are important because a drop in blood pressure as small as 2 mm Hg can reduce the risk of cardiovascular events such as heart attack by up to 10 percent,” said Dr. Kallistratos. “Based on our findings, if someone has the luxury to take a nap during the day, it may also have benefits for high blood pressure. Napping can be easily adopted and typically doesn't cost anything.”

The research is the first of its kind to examine the potential effect of midday sleep on blood pressure levels among people whose blood pressure is reasonably controlled.

“The higher the blood pressure levels, the more pronounced any effort to lower it will appear. By including people with relatively well-controlled blood pressure, we can feel more confident that any significant differences in blood pressure readings are likely due to napping,” said Dr. Kallistratos.

“We obviously don't want to encourage people to sleep for hours on end during the day, but on the other hand, they shouldn't feel guilty if they can take a short nap, given the potential health benefits. Even though both groups were receiving the same number of medications and blood pressure was well controlled, there was still a significant decrease in blood pressure among those who slept during midday."

The research was presented at the American College of Cardiology's 68th Annual Scientific Session. 

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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

Midday naps have been found to help lower blood pressure

A new study from the American College of Cardiology has...

A new study has found that eating more red meat such as beef, pork, and lamb increases an individual's risk of death. The research suggests that this threat is particularly pronounced with a higher intake of processed red meat.

On the other hand, the mortality risk can be reduced over time by eating less <a href="http://www.earth.com/news/reduced-meat-consumption-2050/">red meat</a> while consuming high-quality protein foods such as eggs, fish, and whole grains.

Previous studies have found a correlation between red meat and a higher risk of type 2 diabetes, cardiovascular disease, certain cancers, and premature death. For the current study, researchers from the United States and China set out to determine how changes in red meat intake may influence the risk of death.

The investigation was focused on 53,553 registered female nurses between the ages of 30 and 55 who participated in the Nurses' Health Study (NHS) and 27,916 male health professionals between the ages of 40 and 75 who participated in the Health Professionals Follow-up Study (HPFS). The individuals were all free of cardiovascular disease and cancer at the beginning of the study.

The participants completed a food frequency questionnaire (FFQ) every four years to report how often they ate each food of a standard portion size in the past year. Based on their changes in red meat intake, they were divided into five categories.

During the study period, 14,019 participants died from various causes including cardiovascular disease, cancer, respiratory disease, and neurodegenerative disease.

The study revealed that an increase in red meat intake by 3.5 servings a week or more over an eight-year period was associated with a 10-percent higher risk of death within the subsequent eight years. The effect was found to be largely consistent regardless of age, levels of physical activity, dietary quality, smoking, and alcohol consumption.

In addition, replacing red meat with more whole grains, vegetables, or other high-protein foods was associated with a lower risk of death. For example, trading one serving of red meat for one serving of fish per day over eight years was linked to a 17-percent lower risk of death in the following eight years.

The findings provide "a practical message to the general public of how dynamic changes in red consumption is associated with health," according to the study authors. "A change in protein source or eating healthy plant based foods such as vegetables or whole grains can improve longevity."

The study is published in the journal <a href="https://www.bmj.com/">The BMJ</a>.

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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Image Credit: Shutterstock/hlphoto

Eating more red meat linked with increased risk of death

A new study has found that eating more red meat...

With spring on the way and summer soon to follow, more and more people will flock to <a href="https://www.earth.com/news/air-pollution-national-parks/">national parks</a>, forests, trails, campgrounds, and lakes to enjoy some quality time with nature. For the average recreational hiker, camper, or fisherman, getting lost is the worst case scenario, but it does happen.

Have you ever wondered what you would do if you were lost in the wilderness with no way of getting back, no water, and no shelter?

A new report conducted by <a href="https://smokymountains.com/">SmokyMountains</a> reviewed over 100 news reports of survival stories to create a comprehensive view of how people get lost and the methods they used to survive, find shelter, and flag down rescuers.

The <a href="https://smokymountains.com/safe-and-found/">Safe and Sound study</a> uses data to help answer questions like should you stay put or keep moving, and do you dare to drink untreated water or risk dehydration? An independent survival expert also helped consult on the study to provide tips for survival and staying safe.

The authors of the study found that when it came to getting lost, 41 percent of survivors reported wandering off trail. This was the most common way that people got lost or separated from their group.

Weather, falling off the trail, and injury were all also cited as reasons for getting lost.

Shelter, water and to a somewhat lesser extent, food, are the three biggest needs that must be considered when a person is lost in the wilderness. The study showed that clothes, fires, and camping gear were used to stay warm. 

Many of the survivors used camping gear to make shelters or happened upon caves and downed trees that doubled as shelters. One intrepid skier in California dug a hole in the snow and lined it pine branches for insulation.

Hydration is crucial, and while you can survive without food for a few days at least if you conserve energy, the same cannot be said for water. That’s why survival experts recommend carrying filters or water treatment capsules to use in an emergency.

If it’s a matter of having no water or drinking from an untreated source, the report says that your best bet may be drinking water with most rescues taking place within 24 hours in the US.

Among the survivor reports analyzed for the study, 25 percent relied on a natural body of water, 16 percent used snow to stay hydrated, and other methods included collecting rainwater or dew from leaves, moss, and plants.

The study says that hydration, shelter, and warmth should all be prioritized over food as the average person has a reserve of over 30 days of calories to survive on.

When it came to the decision of staying put or moving, the majority of survivors (65 percent) kept moving, looking for trail markers or finding open areas to flag rescuers.

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By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>, <a href="https://www.earth.com/">Earth.com</a> Staff Writer

What’s the best way to survive if you get lost in the wilderness?

With spring on the way and summer soon to follow,...

Heart attacks have gotten less deadly and less common since the 90s. The saying “as serious as a heart attack” may have to take on a less-dramatic meaning due to the recent findings of a <a href="https://www.yale.edu/">Yale University</a> study published in <a href="https://jamanetwork.com/journals/jamanetworkopen">JAMA Network Open</a>. The study found that – compared to the mid 1990s – Americans today are less likely to have heart attacks and also less likely to die from them.

Researchers tracked over four million Medicare patients between 1995 and 2014 as part of the largest and most comprehensive study of <a href="http://www.earth.com/news/heart-attack-stroke-unemployment/">heart attacks</a> ever in the United States. In this effort, they found that hospitalizations for heart attacks have declined by almost 40%, and the 30-day mortality rate for heart attacks is at an all-time low of 12%. 

Yale cardiologist Harlan Krumholz believes that these trends are a result of the last two decades of national efforts to prevent heart attacks and improve care for those who suffer them. These efforts have included the promotion of healthy lifestyles, focus on risk factors, and improvement in quality of care spearheaded by the Centers for Medicare and Medicaid Services, the American College of Cardiology, and the American Heart Association.

Although this is good news for the nation as a whole, the study does shed light on health outcome disparities in America. 

“Priority health areas,” which had been previously identified as lagging areas, saw little to no change in 30-day mortality rates in the past two decades. The researchers state that these areas should be receiving more focused attention in future healthcare improvement activities.

“We are now at historic lows in the rates of heart attacks and deaths associated with heart attacks,” says Krumholz. “However, this is no time to be complacent. We document extraordinary gains – but the effort is far from finished. The goal is to one day relegate heart attacks to the history of medicine.”

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By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Heart attacks have gotten less deadly and less common since the 90s

Heart attacks have gotten less deadly and less common since...

A team of researchers has found that the benefits of living in a walkable neighborhood could be outweighed by exposure to traffic-related <a href="http://www.earth.com/news/visiting-city-air-pollution-breathing-issues/">air pollution</a>. The study was led by <a href="http://www.stmichaelshospital.com/">St. Michael's Hospital</a> and ICES, a non-profit research institute which addresses a broad range of health care issues.

The investigation was focused on nearly 2.5 million adults in 15 districts of Ontario. The study findings contradict the idea that all walkable neighborhoods provide Canadian residents with an opportunity for improved overall health and well-being.

Study co-lead author Dr. Gillian Booth is a scientist at St. Michael's Hospital's MAP Centre for Urban Health Solutions and at ICES.

"Previous research has shown that individuals living in more walkable neighborhoods are more physically active, with downstream health benefits like lower rates of overweight and obesity, hypertension and diabetes," said Dr. Booth. "But our findings confirm that walkability and air pollution are highly intertwined, potentially diminishing any health benefits derived from living in walkable, urban communities."

According to the researchers, individuals in unwalkable neighborhoods have a higher risk of diabetes or hypertension compared to those living in most walkable communities. However, the health benefits of walkable areas were found to decrease, or even disappear, as concentrations of air pollution increased.

"Individuals living in highly walkable neighborhoods tend to be more likely to choose active forms of transportation, like walking or bicycling, as an alternative to driving," explained study co-lead author Dr. Nicholas Howell. "So they may be more exposed to air pollution based simply on the amount of time they spend outside."

The research suggests that the development of walkable neighborhoods should coincide with strategies to mitigate residents' exposure to air pollution.

"Initiatives to create walkable communities while decreasing sources of car pollution may have promise to reap even greater health benefits and have a stronger impact on the health of Canadians," said Dr. Howell.

The study is published in the journal <a href="https://www.journals.elsevier.com/environment-international">Environment International</a>.

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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Image Credit: Shutterstock/Martyn Jandula

Air pollution outweighs the health benefits of living in walkable areas

A team of researchers has found that the benefits of...

Heart disease is a leading cause of death in the United States, responsible for 1 out of every 4 deaths each year, according to the <a href="https://www.cdc.gov/heartdisease/facts.htm">Centers for Disease Control</a> (CDC).

Now, a new study conducted by researchers from the <a href="https://www.cnic.es/en">Spanish National Center for Cardiovascular Research (CNIC)</a> shows that sleep has a significant impact on heart health and too little sleep can increase the risk of cardiovascular disease by up to 35 percent.

“Cardiovascular disease is a major global problem, and we are preventing and treating it using several approaches, including pharmaceuticals, physical activity and diet,” said José M. Ordovás, the senior author of the study. “But this study emphasizes we have to include sleep as one of the weapons we use to fight heart disease--a factor we are compromising every day.”  

Previous studies have shown that too little or too much sleep can increase the risk of <a href="https://www.earth.com/news/sleep-heart-disease/">heart disease</a> and can cause problems with memory, focus, and mood.

For this study, the researchers found similar results and both sleeping too little (less than six hours a night) or too much (over eight hours a night) increased the risk of heart disease, specifically, atherosclerosis which is when plaque builds up in the arteries.

“This is the first study to show that objectively measured sleep is independently associated with atherosclerosis throughout the body, not just in the heart,” said Ordovás.

The researchers also found that quality of sleep, as well as length, influence cardiovascular disease risk.

The study was published in the <a href="http://www.onlinejacc.org/content/73/2/134">Journal of the American College of Cardiology</a>.

Ordovás and colleagues asked members of the<a href="https://www.cnic.es/en/investigacion/proyectos-clinicos/pesa-cnic-santander"> PESA CNIC- Santander Study</a> to take part in the in the new study where overall 3,974 bank employees from Spain were included in the research. 

The participants didn’t have a history of heart disease, and the researchers asked the participants to wear an actigraph for seven days to record sleep quality and length. Actigraphs measure activity and movement throughout the wearer’s day.

After the week was up, the researchers split the participants into groups depending on how much sleep they got each night. The researchers also took 3D heart ultrasounds and CT scans of the participants to find any signs of heart disease.

Participants that slept less than six hours were 27 percent more likely to have plaque built up in their arteries. Participants who had poor sleep including trouble staying asleep or waking up in the middle of the night had a 34 percent higher likelihood of atherosclerosis.

Sleeping over eight hours was also linked to an increased risk of heart disease and both caffeine and alcohol disrupted normal sleeping patterns.

The research suggests that sleeping patterns need to be considered as a preventive measure to help guard against heart disease, but more work is needed to see if changing sleep patterns will help reduce the risk of heart disease.

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By<a href="mailto:kayvandette@gmail.com"> Kay Vandette</a>, <a href="https://www.earth.com/">Earth.com</a> Staff Writer

Sleeping less than 6 hours a night increases heart disease risk

Heart disease is a leading cause of death in the...

American adults spend close to half of their waking hours looking at screens, according to a new survey from contact lens manufacturer <a href="https://coopervision.com/">CooperVision</a>. The study revealed that our eyes are generally looking at a television, computer, <a href="http://www.earth.com/news/smartphones-sleep-deprivation-kids/">smartphone</a>, or another device around 42 percent of the time we are awake. 

Based on eight hours of sleep per night, the researchers estimated that the average American is in front of a screen for six hours and 43 minutes every day. This means that we have more than 47 hours of screen time in a typical week. 

According to the survey, the amount of time we spend looking at screens is rapidly rising. Around 80 percent of survey respondents said that their screen time has increased over the last five years, while 75 percent admitted they spend too much of their time fixated on their computer, smartphone, or television. 

More than half of the individuals surveyed said that they take breaks from their computer to check their phone, and more than a quarter of participants reported looking at the phone and watching TV at the same time. 


“We live in a digitally-connected world and these survey results show how digital devices have completely transformed our lives, no matter our age,” said Dr. Michele Andrews, who is an optometrist with CooperVision. ‘Digital eye fatigue is faced by millions of Americans every day because of this non-stop screen time.”


The researchers determined that we can stare at a screen for around four hours before experiencing eye discomfort. The study also revealed that the amount of screen time varies significantly with age, with millennials feeling the most attached to their devices. 

Overall, only half of the survey respondents agreed that society as a whole has become more screen-focused over the past five years. In addition, 73 percent of the individuals said too much screen time makes them feel lethargic, and 64 percent feel happier when they step away from the screen. 
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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

Americans spend almost half of the day in front of a screen

American adults spend close to half of their waking hours...

As <a href="https://www.earth.com/news/rates-loneliness-doubled/">we reported</a> last year, rates of loneliness have doubled over the past 50 years, despite the ability to connect online at almost any time. Since pharmaceutical solutions seem to be available for most other ailments, many have questioned if a pill could cure one of humanity’s greatest epidemics and hardest to treat afflictions.

This is the current goal of Dr. Stephanie Cacioppo, a neuroscientist who has studied loneliness for most of her career, and recently spoke to the <a href="https://www.dailymail.co.uk/health/article-6598703/A-pill-loneliness-Scientists-race-treat-condition-raise-premature-death-risks.html">Daily Mail</a> on her efforts to develop a loneliness cure.

With social media platforms and the internet connecting people all over the world in the blink of an eye, you would think loneliness would be a thing of the past. 

However, research has shown that people today feel more<a href="https://www.earth.com/news/loneliness-rise-united-states/"> isolated despite social media’s connectivity</a> and that pervasive loneliness impacts health and wellbeing, especially among younger generations. 

One 2018 nationwide survey of 20,000 US adults found that around <a href="https://www.npr.org/sections/health-shots/2018/05/01/606588504/americans-are-a-lonely-lot-and-young-people-bear-the-heaviest-burden">50 percent of the survey respondents felt lonely some or all of the time</a>. Studies have found links between loneliness and an increased risk of <a href="https://www.nytimes.com/2017/12/11/well/mind/how-loneliness-affects-our-health.html">diabetes, dementia, and cardiovascular disease</a>. 

Cacioppo recently had to deal with loneliness head-on after the sudden death of her husband, an event that motivated her to continue on with her research into what loneliness does to the brain and how to potentially treat it. 

A cure for loneliness may be closer than you think as Cacioppo found that pregnenolone (a steroid naturally made in the body) can help combat the anxiety that comes with feelings of loneliness. 

Several test studies and trials have shown that participants given pregnenolone have less activity in the amygdala and insula parts of the brain compared to control groups. These regions in the brain are linked to the flight or fight response and help people process and perceive threats around them. 

Cacioppo is in the process of analyzing data from a clinical trial in which 96 participants who reported feeling lonely were given different amounts of the steroid or a placebo. If the results are successful, Cacioppo and her team could soon develop a pill form of the steroid which could help ease the anxiety and negative symptoms of loneliness.  

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By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>, <a href="https://www.earth.com/">Earth.com</a> Staff Writer

With loneliness on the rise, there may soon be a pill to treat it

As we reported last year, rates of loneliness have doubled...

How thinking globally, but acting locally can make a difference. The idea that having narrow local focus leaves little room for anything but a selfish mindset is a misconception, according to a new study that found that concern for local issues could help with <a href="https://www.earth.com/news/global-warming-industrial-revolution/">global environmental conservation</a>. 

You might have heard of the acronym <a href="https://www.britannica.com/topic/Not-in-My-Backyard-Phenomenon">NIMBY</a> which means “not in my backyard” and describes an individual or group opposed to a new addition to the neighborhood, typically a factory, roadway or power station. Nimbyism and parochialism, which is a focus on a local area, can go hand in hand, and there are concerns that parochialism paves the way for bigotry, prejudice, narrow-mindedness, and selfishness. 

But researchers from the <a href="https://www.exeter.ac.uk/">University of Exeter</a> found the exact opposite to be true in a new study published in the journal Transactions of the Institute of British Geographers. 

The researchers argue that positive parochialism can inspire a larger awareness of global environmental issues and spur people to action. 

“We did not find evidence that parochialism was inevitably negative and inward-looking,” said Patrick Devine-Wright, a researcher for the study. “It can be those things, but there's no necessary conflict between feeling connected to your local area and feeling connected to the wider world.” 

For the study, the researchers reviewed archival material from the <a href="https://www.commonground.org.uk/parish-maps/">1987 Parish Maps project </a>which was started by the UK charity <a href="https://www.commonground.org.uk/">Common Ground</a>. The researchers also conducted interviews with people who had been involved in the project. The Parish Maps project asked communities to create maps of local areas, highlighting important community buildings, parks, and features. 

The maps were not necessarily accurate cartographically speaking but instead emphasized the most important features to a local community. 

For this study, the researchers show how the Parish Maps project also showcased a passion for the environment and conservation. 

“The Parish Maps project was hugely popular at the time, but has been somewhat overlooked since it ended,” said Devine-Wright. “It led to a huge upswell in local environmentalism and the creation of thousands of maps across the UK and beyond. We argue that it represents parochialism without the negative connotations many people associate with that word.”


The researchers say that the Parish Maps project is a strong example of “positive parochialism,” and shows that thinking locally can influence a global mindset. 

“For a long time, the consensus has been that if we want people to think about global issues they need a cosmopolitan worldview - but this may not be the case,” said Devine-Wright. “Given where we are now in terms of trying to encourage people to make changes to help the environment, ‘positive parochialism’ offers something that has been overlooked.”

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By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>, <a href="https://www.earth.com/">Earth.com</a> Staff Writer

How thinking globally, but acting locally can make a difference

How thinking globally, but acting locally can make a difference....

A new study from the <a href="https://www.ku.dk/english/">University of Copenhagen</a> shows that, in the region that is now northeast Jordan, people began to live alongside <a href="http://www.earth.com/news/dogs-diagnose-malaria/">dogs</a> as far back as 11,500 years ago. The evidence also suggests that dogs were used for hunting, which would explain the drastic increase of hares and other small prey found at the archaeological dig site at this time.

Although dogs were domesticated by humans as early as 14,000 years ago in the Near East, it has remained unclear whether this happened intentionally. The research indicates that humans valued the tracking and hunting abilities of dogs much earlier than previously realized.

“The study of the large assemblage of animal bones from Shubayqa 6 revealed a large proportion of bones with unmistakable signs of having passed through the digestive tract of another animal; these bones are so large that they cannot have been swallowed by humans, but must have been digested by dogs,” explained study lead author and zooarchaeologist Lisa Yeomans.

The year-round accumulation of bones at the site showed that the dogs were living together with the humans rather than simply visiting the area when it was uninhabited.

“The dogs were not kept at the fringes of the settlement, but must have been closely integrated into all aspects of day-to-day life and allowed to freely roam around the settlement, feeding on discarded bones and defecating in and around the site,” explained Yeomans.

The team noticed a major increase in the number of hares at the same time that dogs appeared at Shubayqa 6.

“The use of dogs for hunting smaller, fast prey such as hares and foxes, perhaps driving them into enclosures, could provide an explanation that is in line with the evidence we have gathered,” said Yeomans. “The long history of dog use, to hunt both small as well as larger prey, in the region is well known, and it would be strange not to consider hunting aided by dogs as a likely explanation for the sudden abundance of smaller prey in the archaeological record."

“The shift may also be associated with a change in hunting technique from a method, such as netting, that saw an unselective portion of the hare population captured, to a selective method of hunting in which individual animals were targeted. This could have been achieved by dogs.”

The study is published in the <a href="https://www.journals.elsevier.com/journal-of-anthropological-archaeology">Journal of Anthropological Archaeology</a>.

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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Dogs and humans may have hunted together more than 11,000 years ago

A new study from the University of Copenhagen shows that,...

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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 



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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



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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



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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



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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



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Satellites reveal how Earth's systems are interconnected

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

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



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



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



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



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



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



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



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

Tiger sharks are shifting poleward as temperatures rise

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

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



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



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



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



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



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



Video Credit: ESA&nbsp;



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



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

Melt ponds on the Greenland Ice Sheet

[sendtonews key="qARzJPSabQ-2270617-12187" type="single"] Today’s Video of the Day from the...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> 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

[sendtonews key="qas3EhyI0Y-2220951-12187" type="single"] Today’s Video of the Day from the...

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Today's Video of the Day from the <a href="https://www.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

[sendtonews key="vpljfR2VBX-2560867-12187" type="single"] Today's Video of the Day from the...

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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

[sendtonews key="MHyhtebibJ-2200368-12187" type="single"] Today’s Video of the Day from NASA...

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



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



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



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



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



Video Credit: European Space Agency&nbsp;



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

Satellites have become essential to our survival

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