Science alert

Dec 19, 2023 · University of Washington-led research, published in August, discovered microglia in the brains of people with Alzheimer's disease were in a pre-inflammatory state more frequently, making them less likely to be protective. Microglia are immune cells that help keep our brains healthy by clearing waste and preserving normal brain function.

CNN’s John Vause speaks to Henna Hundal, a delegate to U.N. climate change conferences, about the U.N.’s State of the Global Climate report which found that every …Physicists describe this measure of aging as material time. While the concept has been around since the early 1970s, its interpretation in what's known as the Tool–Narayanaswamy formalism has never been experimentally measured. There's a good reason for this. Glass ages slowly in ways that can't be captured simply by watching it …Jan 29, 2024 · In a study that has yet to be peer reviewed, Zheludev and team searched 5.4 million datasets of published genetic sequences and identified almost 30,000 different Obelisks. They appeared in about 10 percent of the human microbiomes the team examined. In one set of data, Obelisks turned up in 50 percent of the patients' oral samples. Our Sun Might Not Be Quite as Big as We Thought. The star at the center of our Solar System – the Sun – may be infinitesimally smaller than scientists thought. A team of two astronomers has now found evidence that the radius of our Sun is a few hundredths of a percent slimmer than previous analyses indicated. That might not sound like much ...Parting the foliage to disentangle the stem of our own species is not so easy. The classic out-of-Africa hypothesis suggests that Homo sapiens evolved from a distinct lineage of early human that arose around 150,000 years ago before setting off to spread through Europe and beyond. But there is another story. A genomic study led by …Although the study does not show cause and effect, the link between hour-plus commutes and poorer mental health among men was strongest for those who were unmarried, worked more than 52 hours per week, and had no children. Among females, long commuting times were most strongly associated with depressive symptoms among low-income workers, …NPR's Ari Shapiro talks with Emily Kwong and Margaret Cirino about whale menopause, songbird rest stops along migratory routes, and a device that allows people …The microglial cells are responsible for clearing out old and worn out cells via a process called phagocytosis - meaning "to devour" in Greek. The astrocytes' job is to prune unnecessary synapses (connections) in the brain to refresh and reshape its wiring. We've known that this process occurs when we sleep to clear away the neurological …

But after the touchdown at 20 minutes past midnight on Saturday (1520 GMT Friday), the Japan Aerospace Exploration Agency (JAXA) could not confirm that the lightweight craft's solar batteries were generating power. Before turning the lander off remotely, mission control was able to receive technical and image data from its descent, …AI music-making is nothing new. The first, so-called “rules-based”, models date to the 1950s. These were built by painstakingly translating principles of music …We've touched on the hazards of solar storms plenty of times in the past. So it should come as no surprise that a team at NASA has been busily applying AI models to solar storm data to develop an early warning system that they think could give the planet about 30 minutes' notice before a potentially devastating solar storm hits a particular area.Space 15 June 2023. By Michelle Starr. Enceladus imaged by Cassini in 2008. NASA/JPL/Space Science Institute. For the first time, phosphates have been detected in an alien ocean. Found on Saturn 's moon Enceladus, the discovery raises the possibility that life could exist on the tiny frozen satellite. Compounds …Nov 6, 2023 · Humans 06 November 2023. By Michelle Starr. (buradaki/Getty Images Plus) The impact of human activity on the Earth system could result in unpredictable chaos from which there is no return, physicists have calculated. Using a theory conceived to model superconductivity, a team of physicists led by Alex Bernadini of the University of Porto in ... Gunung Padang. (RaiyaniM/Wikimedia Commons/CC BY-SA 4.0) A giant underground pyramid-like structure hidden beneath a hillside in Indonesia far outdates Stonehenge or the Giza Pyramids and, according to a new paper, may come to rival the oldest megalithic structures ever built by human hands. Remember the name Gunung …

The researchers published a scientific paper describing the 4.6 billion-year-old meteorite, which they called Maryborough after the town near where it was found. It weighs a whopping 17 kilograms (37.5 pounds), and after using a diamond saw to cut off a small slice, the researchers discovered its composition had a high percentage of iron, making it a H5 …In 2017, scientists studying bundles of lab-grown cells resembling tiny brains found evidence that disorganized brain cells dividing hurriedly and differentiating too early may give rise to schizophrenia. And in 2021, researchers pinpointed specific genes in the placenta that are active during complicated pregnancies and associated with … Electric senses could be more reliable. They could also help the creatures orient themselves along Earth's magnetic field. If a dolphin slowly swam through a weak area of Earth's magnetic field, researchers explain, it could theoretically generate a weak electric field of around 2.5 microvolts a centimeter across their body. Just enough to detect. Undeterred, scientists undertook another excavation in 2013. Led by paleoanthropologist Shi-Xia Yang of the Chinese Academy of Sciences, an international multidisciplinary team has now worked to characterize the site in detail. Some of the tools recovered at the ...

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Regulatory agencies are alert to the potential health risks of artificial sweeteners; their job is to figure out what levels of food additives are safe to consume based on the available evidence. Just last year, a study involving more than 100,000 volunteers from France flagged an increased risk of heart disease with greater …A nearby exploding star is due to offer a spectacular show that could outshine our North Star this year. The star, which is 3,000 light-years from Earth, is expected to …And now there's a new one: astrophysicists Gustavo Magallanes-Guijón and Sergio Mendoza of National Autonomous University of Mexico have recorded it sort of… pulsing. Every 76 minutes, like clockwork, the gamma-ray flux of Sgr A* fluctuates. This, the researchers say, is similar in periodicity to changes in the black hole's radio and X-ray ...Scientists have accidentally tied the smallest and tightest knot ever, overtaking the top spot in the Guinness Book of World Records. The remarkable microscopic tangle contains just 54 atoms that twist around three times into an interlacing loop called a 'trefoil' knot, with no loose ends. This 'three-leaf clover' shape is the simplest of ...

In a study published in 2022, genomics researchers uncovered a clear relationship between the gene for the A1 subgroup and early onset stroke. Researchers compiled data from 48 genetic studies, which included roughly 17,000 people with a stroke and nearly 600,000 non-stroke controls. All participants were between 18 and 59 … This Camera Takes 1,000 Years to Capture a Single Photograph Tech 20 January 2024. The coolest technology news. From artificial intelligence and robots to quantum computing, renewable energy, lasers, and awesome experiments. Humans are yet to set foot on Mars, but over time, Mars has come to the humans. Chunks of Martian rock ejected from their homeworld by processes such as violent impacts have wended their way through the Solar System to end up – smack! – crashing into Earth. As we collect these samples of our neighboring planet, a curious pattern has emerged. Mini brains grown in a lab from stem cells spontaneously developed rudimentary eye structures, scientists reported in a fascinating paper in 2021.On tiny, human-derived brain organoids grown in dishes, two bilaterally symmetrical optic cups were seen to grow, mirroring the development of eye structures in human embryos.A team at NASA has developed a deep learning model, DAGGER, that can detect and forecast the impact of solar storms on Earth with 30 minutes' notice. The …NPR's Ari Shapiro talks with Emily Kwong and Margaret Cirino about whale menopause, songbird rest stops along migratory routes, and a device that allows people …Dec 1, 2022 · A piece of the El Ali meteorite. (University of Alberta) An analysis of a huge chunk of space rock that fell to Earth in Somalia has revealed materials never before seen in nature. Two new minerals have been analyzed and named, and a possible third is currently under consideration by the International Mineralogical Association. The earliest cities in Europe were built on the foundations of a mostly vegetarian diet, according to new research. The findings suggest that even with the dawn of agriculture and large, planned settlements, meat was but a delicacy. The gigantic circular cities of the Trypillia culture emerged around 6,000 years ago in …Autocatalytic reactions play crucial roles in biology, from regulating our heartbeats to forming patterns on seashells. In fact, the replication of life itself, where one cell takes in nutrients and energy from the environment to produce two cells, is a particularly complicated example of autocatalysis. A chemical reaction called the formose ...Ötzi the Iceman’s etchings hint at a time when artistry pierced the skin with purpose. The 5,000-year-old Ötzi the Iceman mummy had 61 tattoos preserved on his …The gravitational 'hole' in the Indian Ocean, and the location of seismometers (black triangles) deployed on the seafloor. ( Ningthoujam, Negi & Pandey/EOS, 2019) But a longer view was needed to reconstruct the geoid low in its early phases. So Pal and Ghosh retraced the formation of the massive geoid by modeling how tectonic plates skimmed ...

Conditions affecting the nervous system – such as strokes, migraines and dementia – have surged past heart disease to become the leading cause of ill health …

What they found was that the a value for our black hole is between 0.84 and 0.96, which means it's rotating incredibly fast. At the upper range of the estimated rotation, it would be rotating at nearly the maximal rate. This is even higher than the spin parameter of the black hole in M87, where a is estimated to be between 0.89 and 0.91.Scientists Warn The Atmosphere Hasn't Been Like This in 14 Million Years. The last time carbon dioxide in the atmosphere consistently matched today's human-driven levels was 14 million years ago, according to a large new study Thursday that paints a grim picture of where Earth's climate is headed. Published …This is the key switch that kills off cGAS when it's not needed – when there's no threat from foreign DNA. Essentially, it stops the enzyme from attacking healthy cells by …NASA's Parker Solar Probe is set to pass the Sun this year in a milestone moment for space exploration. The probe, launched on Aug 12, 2018, is due to fly past the sun at 195 km/s, or 435,000 mph on 24 December 2024, the BBC reported. NASA describes it as a mission to ""touch the Sun" on its website, aiming to get our "first-ever sampling of …Together, these bones, ligaments, and muscles pull the body into alignment, permitting balance, and – in the case of some monkeys – an ability to grasp and manipulate. So if humans had tails, they'd also need the hips and muscles to make use of them. Otherwise, they'd be little better than a cumbersome length of …We've touched on the hazards of solar storms plenty of times in the past. So it should come as no surprise that a team at NASA has been busily applying AI models to solar storm data to develop an early warning system that they think could give the planet about 30 minutes' notice before a potentially devastating solar storm hits a particular area.Physicists describe this measure of aging as material time. While the concept has been around since the early 1970s, its interpretation in what's known as the Tool–Narayanaswamy formalism has never been experimentally measured. There's a good reason for this. Glass ages slowly in ways that can't be captured simply by watching it …At a distance of 4.25 light-years (40 trillion km; 25 trillion mi) from the Solar System, even Proxima Centauri is unfathomably far away. To put it in perspective, the record for the farthest distance ever traveled by a spacecraft goes to the Voyager 1 space probe, which is currently more than 24 billion km (15 billion miles) from Earth.

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Between January 2021 and May 2023, a European drug database recorded 481 psychiatric events associated with three GLP-1 drugs: semaglutide, liraglutide, and tirzepatide. About half of these events were reported as depression, followed by anxiety. Roughly 20 percent were related to suicidal ideation. All three of these medications are …Between January 2021 and May 2023, a European drug database recorded 481 psychiatric events associated with three GLP-1 drugs: semaglutide, liraglutide, and tirzepatide. About half of these events were reported as depression, followed by anxiety. Roughly 20 percent were related to suicidal ideation. All three of these medications are …Field flips. Scientists map and track the overall shape and orientation of the Earth's magnetic field using local measurements of the field's orientation and magnitude and, more recently, models. The location of the north magnetic pole has moved by about 600 miles (965 kilometers) since the first measurement was …Extreme weather events were "off the charts" in 2023, according to a new report aiming to send a "red alert" to the world about the need for action on climate …Scientists have heretofore proposed that the LLVPs are generated by some sort of internal Earth process, such as remnants of old tectonic slabs, or spots of higher temperature, or a magma ocean at the base of the mantle. But the team behind this latest finding thought something else might have contributed to the formation of the LLVPs: Theia.On Monday, NASA the image, which expands on a snapshot revealed earlier this year of the icy tilted world. The images are a massive step up from the Hubble Space Telescope's attempt, which can barely make out one faint ring around Uranus. Images taken by Hubble Space Telescope (left) and JWST (right) of …Furthermore, AI has distinct advantages over humans, such as better speed and memory capacity, fewer physical constraints, and the potential for more rationality and recursive self-improvement. As computational power grows, AI systems will eventually surpass the human brain's computational capacity. Our primary challenge then is to gain …Undeterred, scientists undertook another excavation in 2013. Led by paleoanthropologist Shi-Xia Yang of the Chinese Academy of Sciences, an international multidisciplinary team has now worked to characterize the site in detail. Some of the tools recovered at the ...4 days ago · Awe-inspiring science reporting, technology news, and DIY projects. Skunks to space robots, primates to climates. That's Popular Science, 145 years strong. This Camera Takes 1,000 Years to Capture a Single Photograph Tech 20 January 2024. The coolest technology news. From artificial intelligence and robots to quantum computing, renewable energy, lasers, and awesome experiments. ….

They found that pythons' ratio of food consumed to meat produced (where a lower number means greater efficiency) was 1.2, compared to 1.5 for salmon, 2.8 for … Microplastics Invade Ancient Rock, And That's a Big Problem For Age Markers Environment 4 weeks ago. Important news about planet Earth. Climate change, global warming, the ecosystems of our world, and strange weather phenomena. A new study challenges the conventional wisdom that wild animals became more active during pandemic lockdowns. Snapshot USA. By Emily Anthes. March 18, 2024. In the early months of the Covid ...Researchers peering back through 800 years of history have concluded that Mayapan – the capital of culture and politics for the Maya people of the Yucatán Peninsula in the 13th and 14th century CE – may well have been undone by drought.The largest ape ever to roam planet Earth didn't stand the test of time, dying out when its smaller peers adapted to environmental change, new research suggests. Standing around three meters tall, the primate Gigantopithecus blacki could have weighed as much as 300 kilograms (660 pounds). Yet like other megafauna of its time, this gigantic ...With every single infection, our risk of long COVID increases. While this risk starts (relatively) low for most of us, particularly those vaccinated and in younger people or children, there are concerning signs it may not stay low. If each new invasion of our bodies allows this insidious virus a greater chance to cause damage, such small risks ...World's Leading Theory on Alzheimer's in Crisis After Major Drug Trials Fail. Health 16 November 2023. By Felicity Nelson. (koto_feja/Getty Images) At the start of the 20th century, psychiatrist Alois Alzheimer became the first person to notice the strange clumps and tangles in the brain of a person who had died with dementia.Regulatory agencies are alert to the potential health risks of artificial sweeteners; their job is to figure out what levels of food additives are safe to consume based on the available evidence. Just last year, a study involving more than 100,000 volunteers from France flagged an increased risk of heart disease with greater …"The Khufu branch remained at a high-water level… during the reigns of Khufu, Khafre, and Menkaure, facilitating the transportation of construction materials to the Giza pyramid complex." Location of the cores (red dots) on the Giza floodplain. (Sheisha et al., PNAS, 2022) ... Science alert, [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1]