Latest news with #ScienceAlert
Yahoo
a day ago
- Health
- Yahoo
Scientists make concerning discoveries while studying mice guts: 'Took a turn for the worse'
Microplastics have infiltrated our bodies, including our brains and blood, and now one new study asserts that they could be wreaking havoc on our guts. The research, summarized on Science Alert, found that the smallest type of microplastics, nanoplastics, led to changes in protein production, gene activity, bacteria levels, and the microRNA coding inside cells when fed to mice. "Overall, the integrity and health of the guts of the mice took a turn for the worse," Science Alert wrote. For instance, the beneficial bacteria Lactobacillus decreased while a potentially harmful one, Ruminococcaceae, increased. And two proteins that normally seal and protect the gut became less abundant. "Given the current limitations in nanoplastic detection technologies and the uncertainties associated with extrapolating animal model results to humans, continued research is critical to accurately evaluate the potential long-term health effects of nanoplastics in humans," immunologist Yueh-Hsia Luo, who wasn't involved in the study, told the site. We already know that microplastics are accumulating inside our bodies. One study, for example, found them in all 23 semen samples examined. Another piece of research discovered that we can absorb microplastics directly into our brains as we breathe. Meanwhile, this new study adds to a body of research investigating the effects of microplastic exposure. For instance, one study on pigs suggested that these tiny plastic pieces can affect the functioning of the nervous system connected to digestion. Another paper found a link between microplastics and chronic kidney disease in mice. Although we are already exposed to microplastics through our air, water, soil, and food, we can help limit the number of new ones entering the environment by reducing our plastic use. You can help by reducing your dependence on plastic. For instance, invest in a reusable water bottle and shopping bag, and bring your own to-go containers when you dine out. Meanwhile, one group of researchers has found a way to remove microplastics from farm soil using a type of processed farm waste, and scientists are also working on ways to remove them from our water. Do you worry about the quality of the air inside your home? Yes — often Yes — but only sometimes Only when it's bad outside No — I never do Click your choice to see results and speak your mind. Join our free newsletter for weekly updates on the latest innovations improving our lives and shaping our future, and don't miss this cool list of easy ways to help yourself while helping the planet.
Yahoo
01-07-2025
- Science
- Yahoo
Scientists found what just might be Earth's oldest rocks
If you purchase an independently reviewed product or service through a link on our website, BGR may receive an affiliate commission. Researchers say they might have discovered the oldest rocks on Earth. The rocks in question are a belt of swirly, stripe-covered rocks found in the northeastern reaches of Canada. These rocks appear to contain some of the oldest minerals that we've ever catalogued. This outcropping of rocks is known as the Nuvvuagittuq Greenstone Belt, and new dating analysis of the belt say that it could be as old as 4.16 billion years. That's nearly as old as the estimated age of the Earth itself. And these findings suggest that the belt could be one of the best locations for digging deeper into understanding our planet's earliest years. But researchers haven't come to this conclusion easily. The Nuvvuagittuq Greenstone Belt has been under scrutiny for over 15 years, geoscientists told Science Alert. Today's Top Deals Best deals: Tech, laptops, TVs, and more sales Best Ring Video Doorbell deals Memorial Day security camera deals: Reolink's unbeatable sale has prices from $29.98 By confirming the age of these rocks, and that they might just be the oldest rocks on Earth, we're finally opening the door to new research possibilities. While there are likely other groups of rocks like this to be found elsewhere, the Earth's surface and crust are constantly in motion as tectonic forces meet with the weathering influences above. This creates a unique area for rocks and dirt to move and break down. As such, finding other places like the Nuvvuagittuq Greenstone Belt that are full of old and unique minerals is difficult. Places like this where the rocks have managed to survive the breakdown of time are extremely valuable for giving us insight into the past, which could hopefully one day help us determine where life on Earth originated from. The oldest rocks on Earth are especially helpful for scientists, as they contain Hadean minerals, which are minerals from Earth's first geological eon. This particular eon spans from the formation of Earth to just over 4 billion years ago. But dating the Nuvvuagittuq Greenstone Belt has been difficult because past attempts to date it returned inconsistent results, ranging from 2.7 billion years to 4.3 billion years. For this new study, which is published in Science, the researchers used two dating measurements on a type of rock known as metagabbro. Both tests returned the same results, suggesting that the researchers were on the right track. While they want to dive deeper into the analysis itself, the researchers say the minimum age of the Nuvvuagittuq Greenstone Belt is 4.16 billion years. More Top Deals Amazon gift card deals, offers & coupons 2025: Get $2,000+ free See the
Time of India
30-06-2025
- Health
- Time of India
Starving to get slim? Water-only fasting trend may be burning more than just fat, experts warn in revealing study
Scrolling through wellness influencers and biohackers on social media, you might have come across glowing testimonials about the benefits of water-only fasting—claims of rapid weight loss , mental clarity, and even anti-inflammatory effects. But new research and medical experts caution that the reality is far more complex—and potentially harmful. Water fasting, as the name suggests, involves abstaining from all food and drink except for water, typically for 1 to 3 days. Its popularity has grown especially among those seeking quick weight loss solutions, but health professionals are urging caution. According to a study cited by Science Alert and AOL, while participants did shed weight—an average of 7.7% of body mass over 10 days—the fast also triggered a slew of worrying physiological responses. More Than Just a Headache: The Hidden Costs of Fasting Short-term side effects reported included headaches, low blood pressure, and insomnia. But it's what was found in participants' blood work that raised even more red flags. The study observed a surprising rise in proteins associated with inflammation , such as C-reactive protein (CRP) and interleukin-8 (IL-8), suggesting that rather than calming the body's immune response, water fasting may actually agitate it. This is significant because inflammation is a key player in the development of several chronic illnesses , including heart disease and autoimmune disorders. As the researchers stated, 'While the acute inflammatory response during prolonged fasting may serve as a transient adaptive mechanism, it raises concerns regarding potential cardiometabolic effects that could persist after refeeding.' Muscle Loss, Memory Risks, and the Question of Long-Term Harm In addition to inflammation, researchers found a decrease in proteins associated with maintaining muscle and bone integrity. Worryingly, levels of amyloid beta—proteins linked to Alzheimer's disease—also dropped. While this might seem positive at first glance, researchers say it could point to alterations in brain function that are not yet fully understood. You Might Also Like: 22 kg weight loss with 3 very easy lifestyle changes: How 'healthy' foods were holding back this man However, experts stress that these findings are not conclusive. The study had a limited sample size—just 20 participants, all of whom were classified as overweight. It remains unclear how water fasting might affect individuals with different body types or existing health conditions. Between Hype and Health While intermittent fasting has been credited in other studies with benefits such as slowing cellular aging and reducing inflammation, this research paints a more complicated picture. As such, experts advise that any form of prolonged fasting should only be undertaken with medical supervision. In an era where wellness trends go viral faster than scientific results can keep up, this serves as a crucial reminder: social media might deliver compelling before-and-after photos, but it doesn't always provide the full picture. As the science continues to evolve, one thing is clear—what works for some might be risky for others, and blindly following fasting fads could do more harm than good. So the next time you're tempted to dive into a water-only fast because your favorite influencer swears by it, remember: real health isn't a trend—and your body deserves more than just what's trending online. You Might Also Like: Forget weight-loss jabs: These nutritionist-approved foods can naturally cut fat without side effects
The Sun
27-06-2025
- Health
- The Sun
Deadly brain-eating parasite is found in ‘contaminated' salad bags sold in UK supermarkets – 7 symptoms to watch out for
HEALTH warnings have been issued over salad bags due to potentially deadly contamination fears. The popular ready-to-eat product sold across UK supermarkets has been associated with a rise in food poisoning cases. 1 Research carried out by the journal Eurosurveillance highlighted the contamination fears reported across 10 European countries, including the UK. This came after over 4% of the leaves in salad samples, tested between October 2021 and September 2022, were found to be contaminated with toxoplasma gondii oocysts. "The parasite Toxoplasma gondii can cause severe disease in humans," the research said. "People can acquire the parasite by eating raw or undercooked infected meat or unwashed fruits or vegetables contaminated with the parasite. "We wanted to investigate T. gondii in commercial ready-to eat (RTE) salads in European countries to estimate the importance of these food products as sources of T. gondii." The bacteria, which can be passed on through contact with cat faeces, has been known to contaminate food and water. This makes salad that is washed or watered with dirty water a prime place for bacteria to grow. According to research cited by Science Alert, this bacteria "can seriously disrupt the brain function of intermediate hosts, potentially including humans". The National Institute of Health previously reported that half of the UK population show signs of past infection by the age of 50. They added that once acquired, these parasites remain in human tissues for life. 'Contaminated' children's cough syrup recalled nationwide over ingredient inside that could kill – parents must act now Health risks This can cause a problem later in life for people who have a weakened immune system, often a result cancer treatments or immunosuppressant drugs. The Food Standards Agency recommended the best action to take to combat this outbreak. "[Always] wash fruit and vegetables with water before you eat them to make sure that they are clean," the experts advised. "You should wash them under a running tap, or in a bowl of fresh water, making sure to rub their skin under the water." While toxoplasmosis is not usually serious and normally gets better on its own, the NHS highlighted that it can cause serious problems in certain situations. This includes if you get it while you're pregnant or have a weakened immune system . If you have a weakened immune system toxoplasmosis may cause problems with your eyes, brain, heart, or lungs. And if you experience more severe symptoms such as confusion, blurred vision, or slurred speech, you should also seek medical help. Positive samples across Europe Samples of the leaves were collected in the Czech Republic, Denmark, France, Germany, Italy, Norway, Poland, Portugal, and Spain as well as the UK. Majority of the positive samples were collected in winter and packaged in the UK, France, Portugal, Spain, and Denmark. Scientists have urged for better control measures to help protect prevent infection. "This is particularly relevant since ready-to-eat salads are intended to be consumed raw without any further treatment by the consumer," they pointed out. "Future work should investigate presence of [the parasite] in different steps of the ready-to-eat production to minimise infection risk for humans." Rise in food poisoning cases The warning follows alerts relating to a significant rise in serious food poisoning cases. The latest annual data from the UK Health Security Agency (UKHSA) showed that Campylobacter infections increased by 17% between 2023 and 2014 - from 60,055 to 70,352. According to UKHSA, this represents the highest number of cases recorded in the past decade. Meanwhile, Salmonella infections also reached a decade high, according to data. They rose by with a 17% as well, from 8,872 cases in 2023 to 10,388 cases in 2024.
Yahoo
25-06-2025
- Science
- Yahoo
Orcas' Strange Beauty Routine Revealed by Scientists For The First Time
Sometimes we all need a kelping hand – or fin. For the first time, orcas have been recorded making and using tools, fashioning pieces of kelp so that they can groom each other as they swim. The new discovery in these remarkable animals (Orcinus orca) isn't just a wonderful example of reciprocal aid. It displays several aspects of cognition and culture in a format that we had never seen in orcas before. "We found that southern resident killer whales regularly use lengths of bull kelp during social interactions, apparently as a tool to groom one another," says marine zoologist Michael Weiss of the Center for Whale Research in the US. "To find that the whales were not just using but also manufacturing tools, and that these objects were being used in a way never before reported in marine mammals, was incredibly exciting." Related: Orcas Have a Killer Technique to Hunt The Biggest Fish in The Ocean The use of tools is thought to be an important marker of intelligence in non-human animals. Although cetaceans are highly intelligent, tool use among them is not widely documented. That's at least partially because their habitat – the ocean – makes them difficult to observe. Nevertheless, we have seen tool use in bottlenose dolphins, which use sea sponges to protect their beaks while foraging. Orcas have the second-largest brain found in nature, and are among the most intelligent animals known. So it's tremendously exciting to find that they are capable of creating a tool to make their lives better. Weiss and his colleagues have been studying the critically endangered southern resident population of orcas that lives in the Salish Sea, a group with fewer than 80 members. In recent years, drone technology has dramatically upgraded our ability to observe orcas in their natural habitat, and scientists have been taking full advantage of the opportunity. "We began using a new drone to observe the whales that allowed us to see the whales and their behavior in much greater detail," Weiss explained to ScienceAlert. "We quickly started seeing whales carrying these small pieces of kelp and pressing them between each other. Once we had observed several pairs doing this behavior on multiple days, we started to think that something scientifically interesting was occurring here." On seven occasions, the orcas were seen snapping the ends off pieces of bull kelp (Nereocystis luetkeana), then pressing the stalk between their bodies. In an eighth case, an orca just found a suitable piece of kelp floating in a kelp mat. As they swam with their bodies pressed together, the orca pairs would roll the piece of the kelp back and forth between them for extended periods. We don't know exactly why the whales do this, but we can make a pretty good guess. Some species of cetacean, including orcas, like to frolic amid flotillas of seaweed. This is called kelping, and it helps keep their skin healthy, sloughing off dead cells and parasites. The new behavior, which Weiss and his colleagues call allokelping, is likely the next level of this form of grooming – one which confers greater benefits than just swimming through kelp. "It certainly does appear to be a social activity, and might help reinforce social bonds like other forms of grooming," Weiss explained. "Unlike swimming through a kelp mat or a kelp forest, pairs of whales can allokelp 'on the go', continuing to travel with the rest of the pod. I also suspect that they're able to target specific areas more precisely and exert greater pressure than if they were just swimming through kelp on their own." Although orcas around the world are all categorized as a single species, they don't really behave as one. Distinct populations, called ecotypes, have their own habitats, their own languages, their own hunting and dietary strategies. There are physical and genetic differences between them, and they don't intermingle or interbreed. Other orca ecotypes have been observed grooming themselves in ways that don't involve fashioning tools, such as rubbing themselves on pebble beaches. Weiss and his team believe that allokelping may be a behavior that is culturally unique to the southern resident orca population. It's a finding that highlights the importance of studying and understanding this tiny population of orcas, in order to better protect them and their habitat. "What's surprising is how much we still have to learn about this population, despite them having been studied in great detail since the 1970s!" Weiss said. "More research is very much needed to better understand the development and function of this behavior. We are very interested to see how allokelping might impact other social behaviors, as an indication of a function in social bonding. We're also keen to conduct more detailed analysis of allokelping and skin condition over time to determine what benefit the behavior is giving the whales." The research has been published in Current Biology. New Discovery of Deep Sea 'Spiders' Is Unlike Anything We've Seen Before Entire Genus of Jumping Spiders Found Hidden in New Zealand New Clues Emerge on How Life Survived 'Snowball Earth'
