The holiday season, filled with festive gatherings and delicious food, can be challenging for anyone committed to a healthy lifestyle.&nbsp;



A new national survey by <a href="https://www.orlandohealth.com/" target="_blank" rel="noreferrer noopener">Orlando Health</a> finds that nearly 40% of Americans worry about overeating during the <a href="https://www.earth.com/news/more-people-die-from-heart-attacks-during-the-holidays/" target="_blank" rel="noreferrer noopener">holidays</a>. However, experts reassure that a few holiday treats are not a cause for guilt or concern over weight gain long-term health impacts.



“Holidays come around once a year, and indulging in a few traditional foods and favorite recipes that may have a little extra sugar or fat is not going to affect your health or derail your healthy habits,” said Sara Riehm, a registered dietitian at Orlando Health.&nbsp;



Riehm notes that, for many, the anxiety about holiday <a href="https://www.earth.com/news/eating-nuts-every-day-does-not-cause-weight-gain-but-it-does-improve-health/" target="_blank" rel="noreferrer noopener">weight gain</a> far outweighs actual weight gain during this time.



<h2 class="wp-block-heading" id="h-healthy-holiday-habits">Healthy holiday habits</h2>



The survey also revealed some common yet counterproductive tactics people use to avoid overindulgence.&nbsp;



One in four respondents, for instance, skip meals before a holiday event in an attempt to “save” calories. Riehm warns against this strategy, as it often leads to overconsumption once hunger takes over.



“It’s a lot easier to make healthier decisions when we're not hungry. Having a light meal with protein and fiber before a party helps you feel fuller and make mindful choices about what you’re eating,” Riehm advised.



She suggests balancing a serving of a favorite holiday treat with nutritious options like <a href="https://www.earth.com/news/how-fruits-and-vegetables-improve-heart-health/" target="_blank" rel="noreferrer noopener">vegetables</a> or a fruit salad to ensure a balanced plate.



<h2 class="wp-block-heading" id="h-debunking-the-detox-myth">Debunking the “detox” myth</h2>



Another common response to holiday indulgence is the urge to “detox” or “cleanse” afterward. The survey showed that a third of people feel the need to detox post-holidays, believing it will offset any negative effects of holiday treats.&nbsp;



However, Riehm explains that these detox measures are not only ineffective but could also pose health risks.



“We can't really detox the body from the so-called ‘toxins’ that we're getting from our food,” she said. “Our liver and kidneys are already designed to remove toxins from the body without the need for juices or supplements.”&nbsp;



She further cautions that detox methods often involve extreme calorie restrictions, potentially leading to dangerous drops in blood sugar and disturbing <a href="https://www.earth.com/news/new-tool-detects-changes-in-gut-health-to-help-prevent-disease/" target="_blank" rel="noreferrer noopener">gut health</a>.



<h2 class="wp-block-heading" id="h-healthy-goals-in-the-holiday-season">Healthy goals in the holiday season </h2>



Rather than resorting to drastic measures, Riehm recommends seeking guidance from a registered dietitian to help manage a balanced and sustainable plan through the holiday season and beyond.



“With so much information, misguided advice, and pseudoscience out there, registered dietitians are going to be your number one source for evidence-based nutrition information,” she said.&nbsp;



According to Riehm, dietitians, unlike self-designated nutritionists, are licensed to provide medical nutrition therapy, making them a reliable resource for developing lasting, health-centered strategies.



<h2 class="wp-block-heading" id="h-making-informed-choices">Making informed choices </h2>



For Joshua Walker, a participant in a six-week lifestyle program at the Orlando Health Center for Health Improvement, working with Riehm revealed surprising insights into his <a href="https://www.earth.com/news/a-healthy-diet-can-reduce-brain-aging/" target="_blank" rel="noreferrer noopener">diet</a>. 



Walker, who carefully manages his diet and exercise, discovered that foods he once considered healthy were elevating his blood sugar.



“I was eating tons of carbs and fruit, and that turns into sugar inside the body,” Walker explained.&nbsp;



Through minor adjustments guided by Riehm, he stabilized his blood sugar and feels confident that he can navigate the holidays without compromising his health goals.&nbsp;



Walker now enjoys the flexibility to indulge without fear: “If Grandma made an apple pie that I’m just looking at and it’s speaking my name, I’ll go ahead and eat a slice.”



<h2 class="wp-block-heading" id="h-consistency-over-perfection">Consistency over perfection</h2>



Riehm emphasizes that sustainable health is built on consistency and flexibility rather than strict avoidance.&nbsp;



“No diet or healthy habit is going to be successful in the long term without a little bit of flexibility,” she said.&nbsp;



Rather than fixating on each meal, Riehm advocates a balanced approach: “The same way that one healthy meal is not going to make a huge difference in your health outcomes, having one unhealthy meal is also not going to make a huge difference.”



Ultimately, the key to maintaining a healthy weight over the holidays is to enjoy traditional foods in moderation and make informed, mindful choices without guilt. 



Embracing this balanced perspective allows holiday celebrations to be a joyful experience rather than a source of stress.



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Worried about holiday weight gain? Here's what the experts say

The holiday season, filled with festive gatherings and delicious food, can be challenging for anyone committed to a healthy lifestyle.&nbsp; A new national survey by Orlando Health finds that nearly 40% of Americans worry about overeating during the holidays. However, experts reassure that a few holiday treats are not a cause for guilt or concern over weight gain long-term health impacts. “Holidays come around once a year, and indulging in a few traditional foods and favorite recipes that may have a little extra sugar or fat is...

Epicenter,Of,A,Nuclear,Explosion,,Armageddon,For,Planet,Earth.,Elements

With around 12,700 nuclear warheads, produced by nine countries and currently distributed around the world, the threat of a nuclear <a href="https://www.earth.com/news/scientists-can-now-observe-supernova-explosions/">explosion</a> is always present. Add to this a war on the border of the European Union, and it does not seem out of place to ask the question: How should one shelter from a nuclear explosion?



In a paper published in <a href="http://dx.doi.org/10.1063/5.0132565">Physics of Fluids</a>, researchers from the University of Nicosia report on the results of their simulated atomic bomb explosion. They used advanced computer modeling to study how a nuclear blast wave speeds through a standing structure, in order to determine where the best place would be for a person to shelter from the effects.&nbsp;



Essentially, no place is really safe when a nuclear bomb goes off. However, the researchers state that, in the event of a nuclear blast, people must not remain outside. Their best chance of surviving is to rush immediately inside a building – to the innermost room, or to an underground location if possible.&nbsp;



The explosion has three components – intense heat and light, a pressure wave, and radiation. Anything too close to the center of the blast is instantly vaporized by the heat and then, a second after the explosion, that heat from the fireball causes a high-pressure wave to develop and move outwards. This is known as a blast wave and it is the shock front which can be likened to a moving wall of highly compressed air. One can be protected from the effects of the shock wave, if one is sheltering in the correct place.&nbsp;



The air immediately behind the shock front is accelerated to high velocities and creates a powerful wind that can hurl people and objects great distances. However, if one shelters in a suitable place indoors, one can be protected from the worst of this wind. In the current study, the researchers simulated the movement of blast wind through a structure that featured rooms, windows, doorways, and corridors. The model enabled the experts to calculate the speed of the air following the blast wave and determine the best and worst places to be.



“Before our study, the danger to people inside a concrete-reinforced building that withstands the blast wave was unclear,” said co-author Dimitris Drikakis. “Our study shows that high airspeeds remain a considerable hazard and can still result in severe injuries or even fatalities.”



According to the results, simply being in a sturdy building is not enough to avoid risk. The tight spaces can actually increase airspeeds, and the involvement of the blast wave causes air to reflect off walls and bend around corners. In the worst cases, this can produce a force equivalent to 18 times a human’s body weight.



“The most dangerous critical indoor locations to avoid are the windows, the corridors, and the doors,” said study co-author Ioannis Kokkinakis. “People should stay away from these locations and immediately take shelter. Even in the front room facing the explosion, one can be safe from the high airspeeds if positioned at the corners of the wall facing the blast.”



There are still more than 100,000 Japanese people alive who survived the bombings of Hiroshima and Nagasaki at the end of the Second World War. Their testimonies are chilling, and it is noticeable that many of them managed to shelter behind walls or embankments, or in sturdy underground bunkers. To this, they owe their survival.



The authors of the current study stress that the time between the explosion and the arrival of the blast wave is only a few seconds, so it is imperative to get to a safe place as quickly as possible.&nbsp;



“Additionally, there will be increased radiation levels, unsafe buildings, damaged power and gas lines, and fires,” said Drikakis. “People should be concerned about all the above and seek immediate emergency assistance.”



While the researchers hope that their advice will never need to be followed, they believe that understanding the effects of a nuclear explosion can help prevent injuries and guide rescue efforts.



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By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer



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What should you do in the event of a nuclear explosion?

With around 12,700 nuclear warheads, produced by nine countries and...

An ever-growing body of evidence supports the importance of the gut-brain axis in linking emotional and cognitive centers in the <a href="https://www.earth.com/news/six-minutes-of-vigorous-exercise-helps-protect-the-brain-from-aging/">brain</a> with the enteric nervous system that governs the function of the&nbsp;<a href="https://en.wikipedia.org/wiki/Gastrointestinal_tract">gastrointestinal tract</a>. Recent advances in research have suggested that there is communication between the gut microbes and the gut-brain axis, and vice versa, by means of neural, endocrine, and immune system links.&nbsp;



A healthy gut microbiome is involved in overall health and wellbeing in people, and has been shown to affect human metabolism, nutrition, physiology, and immune function. Conversely, imbalance in the normal gut microbiota (dysbiosis) has been linked with gastrointestinal conditions such as inflammatory bowel disease (IBD) and irritable bowel syndrome (IBS), as well as mental health issues such as depression, anxiety and autism.



The practice of meditation has also been shown to influence physical, emotional and mental health in people, and it is increasingly incorporated into treatment programs for those suffering psychological distress associated with depression, anxiety, substance abuse, pain, eating disorders and trauma. Deep meditation is known to originate from ancient Indian Ayurveda, and is today practiced by Tibetan Buddhist monks as a form of psychological training. The practice exercises the mind and allows self-regulation of the body, to cultivate wellbeing and provide insights into the true nature of all phenomena.&nbsp;



However, no research has yet been conducted that links the practice of deep meditation with changes in the structure and function of the gut microbiome.&nbsp;



In an attempt to find out whether meditation can influence the gut microbiome, researchers based at the Shanghai Mental Health Center in Shanghai,&nbsp;China, collected fecal and blood samples from 37 Tibetan Buddhist monks from three temples, and compared them with samples from 19 secular residents in areas surrounding the temples.&nbsp;



The monks had all been practicing deep meditation for at least two hours a day, over a period of between three and thirty years. It was a logistical challenge for researchers to collect these samples, due to the isolated and remote conditions in the Tibetan mountains. Despite this, the researchers had to discard many samples from monks and secular participants who had recently taken antibiotics, probiotics, prebiotics or antifungal drugs, or who had eaten yogurt, as these substances can alter the quantity and diversity of gut microbes.



Once the fecal samples were analyzed for genetic material from microbes, the researchers found significant differences in the diversity and volume of microbes in the guts of the monks and their neighbors. The results, published in the journal <a href="http://dx.doi.org/10.1136/gpsych-2022-100893">General Psychiatry</a>, show that the control group (secular neighbors) had a greater diversity of species present in the gut microbiome, than did the monks. While the two groups shared 611 out of 803 different microbe species in their fecal samples, the meditation group had an additional, unique 91 species whereas the control group had 101 additional unique species.&nbsp;



Both groups were matched for age, blood pressure and heart rate. In addition, the two groups had the same dietary structure, with staple foods that included highland barley, rice, steamed bread and noodles. Supplementary food primarily comprised vegetables, meat and butter tea.&nbsp;&nbsp;



The authors report that, at the genus level, Prevotella, Bacteroides, Dialister, Roseburia and Faecalibacterium were the predominant microbes in both ample sgroups. In addition, Bacteroidetes were found to be significantly enriched in samples from the meditation group (29 percent vs 4 percent), which also contained more abundant Prevotella (42 percent vs 6 percent) species, and a high volume of Megamonas and Faecalibacterium species.&nbsp;



These groups of microbes are known to be beneficial to gut health. In addition, previous research has indicated that species of Prevotella, Bacteroidetes, Megamonas&nbsp;and&nbsp;Faecalibacterium&nbsp;have been associated with the alleviation of mental illness symptoms.&nbsp;



“Collectively, several bacteria enriched in the meditation group [have been] associated with the alleviation of mental illness, suggesting that meditation can influence certain bacteria that may have a role in mental health,” write the researchers.



The researchers then applied an advanced analytical technique to predict which chemical processes the microbes might be influencing. Their results suggested that several protective anti-inflammatory pathways, in addition to metabolic pathways – the conversion of food into energy – were enhanced in the meditating monks.



Finally, blood sample analysis showed that levels of chemical agents, including total cholesterol and apolipoprotein B, were significantly lower in the samples from the monks than in their secular neighbors. These biomarkers have previously been associated with decreased immune function and heightened risk of cardiovascular disease.&nbsp;



There are some limitations to this study; it is a comparative study, based on observations of a small, all-male group of participants that all lived at high altitude. This means the conclusions may not be generalizable to the public at large. In addition, no measurements were made of the potential health implications of these differences in gut microbiome, the researchers referring instead to results from other studies for this information.



However, the researchers suggest that their findings show long-term, deep meditation may have a beneficial effect on gut microbiota, enabling the body to maintain an optimal state of health, both physical and mental.&nbsp;



The study authors state that the role of meditation in helping to prevent or treat psychosomatic illness definitely merits further research. “These results suggest that long-term deep meditation may have a beneficial effect on gut microbiota, enabling the body to maintain an optimal state of health.”



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By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer



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Deep meditation transforms gut microbes for optimal health

An ever-growing body of evidence supports the importance of the...

During normal <a href="https://www.earth.com/news/aging-turns-lymph-nodes-into-fat-impairing-immunity/">aging</a>, the human brain undergoes several changes. It loses mass as nerve cells die and the volume of grey matter shrinks, and there are cellular and metabolic changes to the neurons. This results in the loss of synaptic plasticity, the ability of adjacent neurons to pass nerve impulses across their synapses to adjacent neurons. The overall result of these declines is a gradual decease in cognitive ability, manifested as memory loss and the inability to learn.



Recent research on how to protect the brain from these debilitating effects of aging has focused on the role of the specialized protein named brain-derived neurotrophic factor (BDNF). This protein promotes the brain’s ability to form new connections and pathways between nerve cells, and enhances the survival of neurons. It is produced in cells all over the body but its production declines naturally as we age. Research on animals has shown that increasing the availability of BDNF encourages the formation and storage of memories, enhances learning and boosts overall cognitive performance.&nbsp;



Unfortunately, the use of pharmaceuticals to supplement BDNF in humans has not shown much success. In an attempt to identify accessible, equitable and affordable non-pharmacological interventions that anyone can adopt to promote healthy brain aging, researchers from the University of Otago and the University of British Colombia have investigated the effects of fasting and exercise on levels of BDNF. The results are published in the <a href="http://dx.doi.org/10.1113/JP283582">Journal of Physiology</a>.



“BDNF has shown great promise in animal models, but pharmaceutical interventions have thus far failed to safely harness the protective power of BDNF in humans," said lead author Travis Gibbons from the University of Otago. “We saw the need to explore non-pharmacological approaches that can preserve the brain’s capacity, which humans can use to naturally increase BDNF to help with healthy aging.”



Previous research has indicated that both fasting and exercise can protect the brain from age-related cognitive decline. The link between these two stressors is thought to be their ability to force the brain cells to switch away from metabolizing glucose, and to use another substrate for energy production instead. This cerebral substrate switch has been implicated in upregulating the production of BDNF, which then brings heightened levels of this protective protein into the blood.



The researchers recruited 12 healthy, fit participants between the ages of 18 and 56, to help them investigate the effects of fasting and exercising on BDNF production. The participants took part in trials in which they fasted for 20 hours, took part in 90 minutes of low-intensity exercise, took part in six-minute bouts of vigorous exercise, or combined sessions of fasting and exercise. Levels of BDNF were recorded in blood samples from the participants.&nbsp;



The results showed that fasting for 20 hours made no difference to the levels of BDNF in the participants’ blood. Lengthy, low-intensity exercise did raise the blood levels of BDNF slightly (from 336 pg L-1&nbsp;to 390 pg L-1), but the biggest effect was seen when the participants took part in six-minute bouts of vigorous exercise. Their blood levels of BDNF increased from an average of 396 pg L-1&nbsp;to an average of 1170 pg L-1, representing a 3-fold increase.



The cause for these differences is not yet known and more research is needed to understand the mechanisms involved. During intense exercise, the body’s supply of glucose quickly becomes exhausted and the brain switches to a different substrate to use as an energy source. The researchers hypothesize that when the brain switches from metabolizing glucose to metabolizing lactate during vigorous exercise, this may initiate chemical pathways that result in elevated levels of BDNF in the blood.



The observed increase in BDNF during exercise could also be due to the increased number of platelets (the smallest blood cell) which store large amounts of BDNF. The concentration of platelets circulating in the blood is more heavily influenced by exercise than by fasting, and increases by 20 percent during bouts of intense exercise.



These findings add support to the idea that exercise is beneficial for brain and body health in aging people. Six minutes of high-intensity exercise, undertaken on a regular basis, could extend the lifespan of a healthy brain and delay the onset of neurodegenerative disorders, such as Alzheimer's disease and Parkinson's disease.&nbsp;&nbsp;



“We are now studying how fasting for longer durations, for example up to three days, influences BDNF. We are curious whether exercising hard at the start of a fast accelerates the beneficial effects of fasting. Fasting and exercise are rarely studied together. We think fasting and exercise can be used in conjunction to optimize BDNF production in the human brain,” said Gibbons.



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By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer



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Six minutes of vigorous exercise helps protect the brain from aging

During normal aging, the human brain undergoes several changes. It...

The gut <a href="https://www.earth.com/news/peanuts-and-herbs-positively-impact-our-gut-microbiome/">microbiome</a> is made up of tens of trillions of healthy and unhealthy microbes that play a major role in human health. As a growing collection of research helps to clarify the potential benefits of gut bacteria, a new study from <a href="https://medicine.wustl.edu/">Washington University School of Medicine</a> demonstrates that the gut microbiome has a significant impact on brain health.&nbsp;



People with Alzheimer’s disease appear to have gut microbiomes that are different from those of healthy people, but it is not yet known whether these differences are a cause or a result of the disease. "Alzheimer’s disease (AD) is characterized by early deposition of amyloid-β (Aβ) plaques followed by pathological tau accumulation. Although Aβ is a necessary factor in AD pathogenesis, its accumulation in and of itself is insufficient for neurodegeneration and cognitive decline," wrote the study authors.



"By contrast, pathological tau accumulation is closely linked with neurodegeneration and cognitive decline in AD and primary tauopathies. Alterations of the gut microbiota have been reported in AD, which suggests that the microbiota may contribute to AD progression."



To investigate, the researchers altered the gut bacteria of mice that were predisposed to develop cognitive impairment. The study revealed that modified gut bacteria changed the behavior of immune cells throughout the body, including neural cells that promote brain damage that is associated withAlzheimer’s disease.&nbsp;



“We gave young mice antibiotics for just a week, and we saw a permanent change in their gut microbiomes, their immune responses, and how much neurodegeneration related to a protein called tau they experienced with age,” said study senior author Dr. David M. Holtzman. “What’s exciting is that manipulating the gut microbiome could be a way to have an effect on the brain without putting anything directly into the brain.”



Short-chain fatty acids are compounds produced by specific types of gut bacteria. The experts identified three short-chain fatty acids that were associated with neurodegeneration in the mice. Ultimately, these compounds activated immune cells in the brain that caused tissue damage.&nbsp;



Dr. Linda McGavern is the program director at the National Institute of Neurological Disorders and Stroke (NINDS), which provided some of the funding for the study. She noted that the study may offer important insights into how the microbiome influences tau-mediated neurodegeneration, and suggests therapies that alter gut microbes may affect the onset or progression of neurodegenerative disorders.



“What I want to know is, if you took mice genetically destined to develop neurodegenerative disease, and you manipulated the microbiome just before the animals start showing signs of damage, could you slow or prevent neurodegeneration?” said Dr. Holtzman.&nbsp;



“That would be the equivalent of starting treatment in a person in late middle age who is still cognitively normal but on the verge of developing impairments. If we could start a treatment in these types of genetically sensitized adult animal models before neurodegeneration first becomes apparent, and show that it worked, that could be the kind of thing we could test in people.”



The study is published in the journal <a href="http://dx.doi.org/10.1126/science.add1236">Science</a>.



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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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Gut bacteria have an impact on brain health

The gut microbiome is made up of tens of trillions...

Children often become active on social media platforms during their early <a href="https://www.earth.com/news/emotional-eating-by-teens-is-influenced-by-their-parents/">adolescent</a> years. This is a critical developmental period when the brain is especially sensitive to social feedback, and it is possible that the frequent checking of social media may affect the way in which adolescents’ brains respond to the world around them.&nbsp;



A new study from researchers at the <a href="https://www.unc.edu/">University of North Carolina at Chapel Hill</a> has now investigated adolescent neural development in relation to technology use over a three-year period, in order to identify links with habitual checking behavior.&nbsp;



The researchers selected 169 participants (average age 12.9 years) from three public middle schools in rural North Carolina. At the start of the study, the sixth- and seventh-grade students completed a survey about how often they checked three popular social media platforms, namely Facebook, Instagram and Snapchat. Following this, they underwent yearly functional magnetic resonance imaging (fMRI)&nbsp;of their brains while completing the social incentive delay task, which measures brain activity while anticipating social feedback from peers.



Previous studies have shown that 78 percent of 13- to 17-year-olds check their mobile devices at least hourly, and 35 percent of teens report using at least one of the top five social media platforms almost constantly.&nbsp;In the current study, the number of times participants checked their social media feeds ranged between less than once to more than 20 times a day.&nbsp;



The research findings, published in the <a href="http://dx.doi.org/10.1001/jamapediatrics.2022.4924">JAMA</a>, showed that 12- to 13-year olds who checked their social media feeds more frequently (more than 15 times per day) had different patterns of neural development in certain brain areas than did those who checked less frequently. Over the three-year period, participants who checked more frequently also became more sensitive to social feedback in the form of rewards and punishments.&nbsp;



“The findings suggest that children who grow up checking social media more often are becoming hypersensitive to feedback from their peers,” said Eva Telzer, a professor in UNC-Chapel Hill’s psychology and neuroscience department and a corresponding author.



“While this increased sensitivity to social feedback may promote future compulsive social media use, it could also reflect a possible adaptive behavior that will allow teens to navigate an increasingly digital world,” noted Maria Maza, a doctoral student in psychology and one of the study’s two lead authors.



Social media platforms provide adolescents with unprecedented opportunities for social interactions during a critical developmental period when the brain is especially sensitive to social feedback. Furthermore, these platforms deliver a constant and unpredictable stream of social feedback in the form of likes, comments, messages and notifications. This pattern of delivery often proves irresistibly attractive to users, who eagerly await any form of communication.&nbsp;



“These social inputs are frequent, inconsistent and often rewarding, making them especially powerful reinforcers that can condition users to check social media repeatedly,” said Kara Fox, co-lead author of the study and a doctoral student in psychology.&nbsp;



The results of this cohort study, one of the first long-term studies on adolescent neural development and technology use, suggest that social media checking behaviors in early adolescence may be associated with changes in the brain’s sensitivity to social rewards and punishments, explained the study authors. They suggest that further research is needed on the long-term associations between social media use, adolescent neural development, and psychological adjustment in order to understand the effects of this ubiquitous influence on development in today’s adolescents.



“Most adolescents begin using technology and social media at one of the most important periods for brain development during our lifetime,” said co-author Mitch Prinstein, who also serves as the chief science officer for the American Psychological Association.&nbsp;



“Our research demonstrates that checking behaviors on social media could have long-standing and important consequences for adolescents’ neural development, which is critical for parents and policy-makers to consider when understanding the benefits and potential harms associated with teen technology use.”



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By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer



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Social media use alters the adolescent brain

Children often become active on social media platforms during their...

Since the beginning of the <a href="https://www.earth.com/news/china-may-trigger-the-deadliest-wave-of-the-covid-19-pandemic/">Covid-19</a> pandemic, SARS-CoV-2 has infected over 600 million people worldwide, resulting in 6.57 million confirmed deaths worldwide - a major underestimate, with studies arguing that this value has already tipped 20 million. Yet, information about factors affecting the probability of infection or experiencing a severe course of the disease remain scarce and often speculative.



Now, a team of researchers led by <a href="https://cuni.cz/uken-1.html">Charles University</a> in the Czech Republic has surveyed over 30,000 internet users, who shared their information about their exposure to 105 risk factors for Covid-19, including behavioral traits such as taking vitamins and supplements, being actively engaged in sports, keeping pets, swimming in cold water, walking in nature, volunteering, singing, or smoking tobacco or marijuana.



The analysis revealed that people who live in larger cities and have a higher level of education, especially women, had a lower risk of infection, while larger household sizes and the number of children were associated with a higher risk of infection. Moreover, people living on their own had a lower chance of catching Covid-19.&nbsp;



Quite surprisingly, active involvement in sports, frequent singing, and cold-water swimming increased the risk of infection, while tobacco smoking and marijuana use (in women) had a relatively strong protective effect on both infection and the development of severe illness. However, the most substantial protective factors appeared to be strict adherence to mask-wearing, as well the consumption of vitamins and supplements, particularly vitamin D.



Yet, the most unexpected result was a positive correlation between the severity of disease and adherence to mask wearing and social distancing. The scientists speculate this is because people with comorbidities (such as diabetes, obesity, or chronic respiratory illnesses) tried hard to avoid infection and adhered more strictly to non-pharmaceutical protective measures such as mask-wearing. However, when they did become infected, they often had a more severe course of the disease due to their underlying health factors.



“This preregistered longitudinal study is of explorative nature. Therefore, although the observed effects were strong and remained highly significant even after correction for multiple tests, it will be necessary to confirm their existence in future independent studies,” the authors concluded.



The study is published in the journal <a href="http://dx.doi.org/10.1093/biomethods/bpac030">Biology Methods and Protocols</a>.



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer



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Study reveals surprising risk factors for Covid-19

Since the beginning of the Covid-19 pandemic, SARS-CoV-2 has infected...

Insulin is an essential hormone for humans and many other animals, helping to regulate sugar <a href="https://www.earth.com/news/coffee-before-breakfast-has-a-negative-impact-on-metabolism/">metabolism</a>. In order to clarify how this process functions, a team of researchers led by the <a href="https://www.uni-wuerzburg.de/en/home/">Julius Maximilians University of Würzburg</a> (JMU) has used the fruit fly&nbsp;Drosophila melanogaster&nbsp;as a case study.



While this fly also secretes insulin after meals, this hormone does not come from the pancreas as in humans, but is instead released by nerve cells in the brain. By measuring the activity of insulin-producing cells in walking and flying Drosophila, the experts found that physical activity has a strong effect on these cells: when the fly starts to move, its insulin-producing cells are immediately inhibited, whereas when it stops moving, the activity of these cells rapidly increases and rises above normal levels. According to the scientists, the fast, behavior-dependent inhibition of insulin-producing cells is actively controlled by neural pathways.



“We hypothesize that the low activity of insulin-producing cells during walking and flight contributes to the provision of sugars to meet the increased energy demand,” said study lead author Sander Liessem, an expert in Neurobiology and Genetics at JMU. “We suspect that the increased activity after exercise helps to replenish the fly’s energy stores, for example in the muscles.”



The researchers argued that, although the release of insulin in fruit flies is mediated by different cells than in humans, the insulin molecule and its functions have not changed much in the course of evolution. Thus, these findings could contribute to human health too, by highlighting a possible link explaining how physical activity could positively affect insulin regulation via neuronal signaling pathways.



In future studies, the scientists aim to investigate which neurotransmitters and neural circuits are responsible for the activity changes observed in insulin-producing cells in flies, and what other factors – such as the age of the flies or their nutritional states – could have an influence on these cells. Ultimately, the researchers plan to bring these two questions together: how does the brain control movement, and how does the nervous system ensure that the energy balance is regulated accordingly?



The study is published in the journal <a href="http://dx.doi.org/10.1016/j.cub.2022.12.005">Current Biology</a>.



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer



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Physical activity curbs insulin production

Insulin is an essential hormone for humans and many other...

Fresh,Salmon,With,Vegetables,On,A,Wooden,Table

The Mediterranean diet is associated with enormous health benefits, such as reducing the risk of heart disease and improving cognitive function. Now, a study led by the <a href="https://www.unisa.edu.au/">University of South Australia</a> has revealed that the Mediterranean diet also improves <a href="https://www.earth.com/news/stress-may-be-linked-to-female-fertility-issues/">fertility</a>.



"Infertility is a global health concern affecting 48 million couples and 186 million individuals worldwide," wrote the study authors.&nbsp;



"Infertility creates a significant economic and social burden for couples who wish to conceive and has been associated with suboptimal lifestyle factors, including poor diet and physical inactivity.



The research suggests that the diet may help people overcome infertility, which means it has great potential as an affordable, non-intrusive option for couples who are struggling to conceive. The experts found that the Mediterranean diet improves fertility, assisted reproductive technology (ART) success, and sperm quality in men.



“Deciding to have a baby is one of life’s biggest decisions, but if things don’t go as planned, it can be very stressful for both partners,” said study co-author Dr. Evangeline Mantzioris.



“Research shows inflammation can affect fertility for both men and women, affecting sperm quality, menstrual cycles, and implantation. So, in this study we wanted to see how a diet that reduces inflammation - such as the Mediterranean diet - might improve fertility outcomes.



“Encouragingly, we found consistent evidence that by adhering to an anti-inflammatory diet - one that includes lots of polyunsaturated or ‘healthy’ fats, flavonoids (such as leafy green vegetables), and a limited amount of red and processed meat – we can improve fertility.”



The Mediterranean diet is primarily plant-based, and includes whole grains, extra virgin olive oil, fruits, vegetables, beans and legumes, nuts, herbs, and spices. Yoghurt, cheese, and lean protein sources such as fish, chicken, or eggs; red and processed meats are only eaten in small amounts.



&nbsp;The Mediterranean diet includes fruits, vegetables, whole grains, legumes, nuts and healthy fats, such as fish. This diet is associated with lower levels of inflammation, while a typical western diet has been linked with higher levels of inflammation.



Study co-author Simon Alesi of Monash University said that understanding the association between anti-inflammatory diets such as the Mediterranean diet, and fertility, could be a gamechanger for couples hoping to start a family.



“The Mediterranean diet is consistently ranked among the healthiest diets in the world. But knowing that it may also boost your chances of conceiving and having a baby is extremely promising,” said Alesi.



“Modifying your diet is a non-intrusive and affordable strategy that could potentially improve infertility. Of course, more research needs to be done, but at the very least, shifting to a Mediterranean diet will not only improve your overall health, but also your chances of conceiving.”



The study is published in the journal <a href="http://dx.doi.org/10.3390/nu14193914">Nutrients</a>.



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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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Mediterranean diet improves sperm quality and fertility

The Mediterranean diet is associated with enormous health benefits, such...

According to a new survey study of over 13,000 people across 122 countries, bonding with family members is linked to behaviors that can improve health during crises such as the pandemic. During the first wave of the pandemic, strong social bonds were associated with healthy behaviors like hand washing, mask wearing, and social distancing.



The researchers found that 46 percent of people who had strong family <a href="https://www.earth.com/news/social-bonds-can-ease-stress-among-elephants/">bonds</a> washed hands consistently at the onset of the pandemic, compared to 32 percent who did not have strong connections with their families. In addition, 54 percent of people who lacked close family bonds reported they never wore a mask.&nbsp;



Despite the fact that people with strong family ties constituted only 27 percent of the entire sample, they represented 73 percent of those who engaged in social distancing, 35 percent of those who washed their hands regularly, and 36 percent of those who consistently wore masks.



The analysis also revealed that having strong bonds with both close social circles and more extended groups led to better mental health and wellbeing. Moreover, the larger the number of groups people had stronger bonds with, the higher their engagement in health behaviors and the better their self-reported mental wellbeing. These findings suggest that public health communication should hocus on smaller networks as well as on multiple groups, particularly in times of crisis such as the Covid pandemic.



“This research speaks to the universal need to belong – this is one of the reasons we felt it was so important to include a truly diverse sample from across the globe. Wherever you are in the world, other people matter to you,” said study corresponding author Martha Newson, an anthropologist at the <a href="https://www.kent.ac.uk/">University of Kent</a>.



“We found that having lots of groups was important to encourage better health behaviors, including bonding to abstract groups like your country or government, but most important of all are our closest friends and family - groups that we have likely recognized as being important since the beginning of human history.”&nbsp;&nbsp;



“At times of turmoil, such as during disasters, social crises, or pandemics, our social bonds can be key to receiving support. We look out to people we trust and identify with as we decide what course of action to take. That’s why our close bonds with family – the people many of us share significant life events with and learn from – can promote healthy behaviors,” added study lead author Bahar Tunçgenç, a senior lecturer in Psychology at <a href="https://www.ntu.ac.uk/">Nottingham Trent University</a>.



“At the same time, having strong social connections – no matter how abstract or distant these might be – is crucial for promoting mental health. Our research shows that close and extended social bonds offer different sources of support and direction,” she concluded.



The study is published in the journal <a href="https://doi.org/10.1126/sciadv.add3715">Science Advances</a>.



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer



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Strong social bonds promote healthy behaviors

According to a new survey study of over 13,000 people...

Replacing traditional wood and charcoal <a href="https://www.earth.com/video/gas-stoves-create-dangerous-levels-of-indoor-pollution/">stoves</a> could save nearly half a million lives each year in Africa alone, according to a new study from <a href="https://www.kth.se/en">KTH Royal Institute of Technology</a> in Stockholm. The researchers have published an open-source tool known as OnStove that can be used by local policymakers across the region to address a "severe market failure” in delivering clean cooking methods.



"Clean cooking is commonly defined as cooking with fuels and stove combinations that meet the standards set by the World Health Organization’s Guidelines for Indoor Air Quality," wrote the study authors.



"As of 2020, roughly 2.4 billion people worldwide lacked access to clean cooking, relying on polluting fuels instead to meet their daily cooking needs. The lack of clean cooking is especially pronounced in sub-Saharan Africa (SSA), where only 17% of the population currently use clean solutions."



According to the researchers, the OnStove geospatial tool provides a data-based way to calculate the costs and benefits of transitioning to clean cooking alternatives such as gas and electric stoves.



OnStove data shows that as many as 463,000 deaths could be prevented in Africa every year by replacing traditional wood- and charcoal-burning stoves. Professor Francesco Fuso-Nerini noted that clean cooking in sub-Saharan Africa could generate a savings of $66 billion in healthcare costs.



The OnStove tool has already been applied to support the Nepal government’s energy policies. The researchers have also begun working with the Kenyan government to assist in a widespread transition toward clean cooking.



“It was well received where we started to use it. There’s a lot of interest from other organizations and governments,” said Professor Fuso-Nerini. “But it’s a complex issue and this is one of the first tools that gives good information and a good picture of what you would need to transition away from these bad ways of cooking.”



The tool supports policy making by assigning actual value to traditional cooking methods’ negative aspects, such as respiratory disease or lost time due to collecting wood or other burnable biomass, explained Professor Fuso-Nerini.



“These values give a better understanding about costs and benefits of clean cooking. That enables governments to step in and take a broad view that moves people in the right direction.”



The study is published in the journal <a href="http://dx.doi.org/10.1038/s41893-022-01039-8">Nature Sustainability</a>.



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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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Clean cooking could save half a million lives each year

Replacing traditional wood and charcoal stoves could save nearly half...

Being socially connected is vital to human wellbeing but this aspect of human functioning is often impaired in people who suffer the symptoms of depression or <a href="https://www.earth.com/news/artificial-sweetener-has-been-linked-to-anxiety/">anxiety</a>. They may feel withdrawn and tired, unable to find the energy or drive to interact with people. Many patients with depression tend to withdraw from social contact and would rather stay at home, or in bed, than face society.&nbsp;



A new study by researchers from <a href="https://www.osu.edu/">Ohio State University</a> has revealed that when depressed or anxious people perform acts of kindness towards others, the symptoms of their mental illness become less severe and they are able to heal themselves to a certain extent.&nbsp;&nbsp;



“Social connection is one of the ingredients of life most strongly associated with wellbeing. Performing acts of kindness seems to be one of the best ways to promote those connections,” said David Cregg, who led the research as part of his PhD dissertation.



Cregg and his colleague Professor Jennifer Cheavens tested their acts of kindness technique in an experiment involving 122 people from central Ohio who had moderate to severe symptoms of depression, anxiety, and stress.&nbsp;



After an initial introductory session, the participants were randomly allocated to one of three different groups.&nbsp; Two of the groups received interventions that are commonly used in cognitive behavioral therapy (CBT) treatments for depression. The first group was instructed to plan social activities for two days a week, and the members of the second group had to keep records, for at least two days a week, that helped them identify negative thought patterns and revise their way of thinking in order to reduce depression and anxiety (a form of cognitive reappraisal).&nbsp;



The participants in the third group were instructed to perform three acts of kindness a day, for two days out of each week. Acts of kindness were defined as “big or small acts that benefit others or make others happy, typically at some cost to you in terms of time or resources.” Examples of kind acts that participants performed included baking cookies for friends, offering to give a friend a ride, and leaving sticky notes with worlds of encouragement in places where s roommate would find them.



All three interventions continued for a period of five weeks. Participants were evaluated after week five, and then again after a further five weeks, to see whether the interventions were successful at reducing the symptoms of depression and anxiety.



The researchers’ findings, published in the <a href="http://dx.doi.org/10.1080/17439760.2022.2154695">Journal of Positive Psychology</a>, showed that helping others is a powerful technique for healing oneself. &nbsp;Although participants in all three groups showed an increase in sense of life satisfaction, and a reduction in depression and anxiety symptoms after the 10 weeks of the study, those participants in the acts of kindness group showed the greatest improvements.



“These results are encouraging because they suggest that all three study interventions are effective at reducing distress and improving satisfaction,” Cregg said. “But acts of kindness still showed an advantage over both social activities and cognitive reappraisal, by making people feel more connected to other people, which is an important part of well-being."



Cheavens noted that just taking part in social activities did not improve feelings of social connection in this study. In addition, the process of cognitive reappraisal also does not involve increasing social connectedness in any way. &nbsp;



“There’s something specific about performing acts of kindness that makes people feel connected to others. It’s not enough to just be around other people, participating in social activities,” she said.



The researchers also discovered why performing acts of kindness worked so well to improve the symptoms of people with depression or anxiety. It helped distract participants from their own suffering while they were reaching out to help and consider others.&nbsp;



“Doing nice things for people and focusing on the needs of others may actually help people with depression and anxiety feel better about themselves,” explained Cheavens.



“We often think that people with depression have enough to deal with, so we don’t want to burden them by asking them to help others. But these results run counter to that,” she said.



Cregg said that, while this study used techniques of CBT, it is not the same experience as going through a complete CBT treatment. Those who undergo the full treatment may have better results than those in this study. However, the findings do show that even the limited CBT exposure given in this study can be helpful to people with depression or anxiety.&nbsp;



“Not everyone who could benefit from psychotherapy has the opportunity to get that treatment,” she said.&nbsp;“But we found that a relatively simple, one-time training had real effects on reducing depression and anxiety symptoms.”



And even those who are able to get CBT treatment may benefit even more if they are encouraged to carry out acts of kindness towards others on a regular and ongoing basis. This study shows that helping others has a healing effect through creating vital social connections.



“Something as simple as helping other people can go above and beyond other treatments in helping heal people with depression and anxiety,” concluded Cregg.



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By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer



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Acts of kindness can help relieve depression

Being socially connected is vital to human wellbeing but this...

According to a new study published in the <a href="http://dx.doi.org/10.1161/JAHA.122.026173">Journal of the American Heart Association</a>, teenagers who reported feeling optimism, self-esteem, happiness, belongingness, and feeling loved and wanted were more likely to have better <a href="https://www.earth.com/news/honey-can-improve-cardiometabolic-health/">cardiometabolic health</a> in their 20s and 30s compared to teens with fewer positive mental health assets. This association appeared stronger in the case of Black youth.&nbsp;&nbsp;



Although previous studies have found that psychological aspects of well-being, such as optimism and happiness, can positively influence cardiometabolic health, most of this research was conducted among older adults. By contrast, this new study focused on earlier life and took into consideration a broader measure of cardiometabolic health, including indicators of blood sugar levels and inflammation.



“We learned a lot in the last few decades about the impact of discrimination and other social risks youth of color face that may explain their elevated rates of cardiometabolic disease, however, much less attention is paid to the inherent strengths they possess and the ways those strengths may be leveraged to advance health equity,” said lead study author Farah Qureshi, an assistant professor of Social Epidemiology at the <a href="https://publichealth.jhu.edu/">Johns Hopkins Bloomberg School of Public Health</a>. “In this study, we wanted to shift the paradigm in public health beyond the traditional focus on deficits to one that concentrates on resource building.”&nbsp;



The scientists examined data related to health and well-being from nearly 3,500 U.S. teenagers from 1994 to 2018. Half of the participants were girls, 67 percent were white youth, 15 percent Blacks, 11 percent Latinos, and six percent Native American, Asian, or other. By using initial responses from when the participants were teenagers, the researchers identified five mental health assets related to better cardiometabolic health: optimism, happiness, self-esteem, a sense of belonging, and feeling loved. 



In addition, seven health measures aiming to examine cardiometabolic health were included and collected during clinical visits when participants were in their 20s and 30s: high-density lipoprotein (HDL), or “good” cholesterol, non-HDL cholesterol, systolic blood pressure, diastolic blood pressure, hemoglobin A1c (a measure of blood sugar), C-reactive protein (a measure of inflammation), and body mass index.



The analysis revealed that teens with four to five positive mental health assets were 69 percent more likely to maintain positive cardiometabolic health as young adults, and each additional asset conferred a 12 percent greater probability of positive cardiometabolic health. Although the assets were found to be protective across all racial and ethnic groups, the largest benefits were observed among Black youth, who also reported having more of these assets than participants from other groups.&nbsp;



However, racial disparities in cardiometabolic health were still apparent in adulthood. “These somewhat counterintuitive findings were surprising,” Qureshi said. “When we dug deeper, we found that the absence of psychological assets being was particularly health-damaging for Black youth. For Black youth – who face numerous barriers to achieving and sustaining optimal cardiometabolic health in adulthood – not having these additional mental health resources makes a big difference.”



“This work suggests that early investments in youth mental health may be a critical new frontier in the advancement of cardiometabolic health equity. We need more large-scale studies to monitor these and other positive mental health factors starting in childhood to understand how these assets may influence health and disease over the life course. This information may help us identify new ways to improve health and reduce disparities,” she concluded.



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer



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Feeling loved as a teen linked to healthier adulthood

According to a new study published in the Journal of...

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



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



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



Video/ Image Credit: ESA



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

Nushagak Bay in southwest Alaska

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



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



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



Video/ Image Credit: American Chemical Society&nbsp;



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



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Flu viruses are more flexible than expected

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

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



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



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



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



Video/Image Credit: ESA&nbsp;



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

Lake Trasimeno in Central Italy

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



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



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



Video Credit: American Chemical Society&nbsp;



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



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Detecting mercury contamination with the tap of a finger

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

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



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



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



Video Credit: ACS Reactions



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



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How does salt makes things taste better?

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

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



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



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



Video/ Image Credit: ESA



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



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Santiago, Chile in South America

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

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

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



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



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



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



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



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



Video Credit: Johns Hopkins&nbsp;



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



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Interactive map of the universe includes 200,000 galaxies

[sendtonews key="e4ZG0Jawp3-2374785-12187" type="single"] Astronomers at Johns Hopkins University have created...

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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



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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



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

Satellites reveal how Earth's systems are interconnected

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



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



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



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



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



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



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



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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



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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



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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



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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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