An anonymous reader quotes a report from TechCrunch: After already targeting verticals like hotels and apartment complexes, Amazon announced today it's now rolling out new solutions for healthcare providers and senior living centers. The solutions, which are a part of Alexa Smart Properties, are designed specifically to meet the needs of deploying Alexa devices at scale and will allow the facility's administrators to create customized experiences for their residents or patients. In senior living centers, the residents would be able to use Alexa devices to call their family members and other loved ones, as well as keep up with the goings-on at their community and other community news. The devices could also be used to make announcements, allow the residents to communicate with each other through direct audio messages and make voice and video calls, and they can streamline other center activities -- like check-ins, maintenance requests and various administrative tasks. Amazon believes this could help make facilities more efficient and productive. Amazon says senior living communities include Atria and Eskaton will integrate with its new solution.

With Amazon's new solution for hospitals, patients will be able to use Alexa to communicate with care staff, control the devices in their room, and stay entertained with news and music. Healthcare providers can also communicate with their patients using Alexa features like calling and Drop-In, without having to enter the patient rooms. This could also help hospitals be more productive and conserve their medical supplies and protective equipment like gloves, masks and gowns, notes Amazon. (PPE shortages had been an ongoing issue in some locations as COVID spiked during the pandemic.) Though Amazon has struggled with privacy issues related to its use of voice recordings and transcriptions, the healthcare and senior living center solutions will not save the voice recordings and don't require users to share personal info with Alexa to use the device, the company explains. Users can also mute the Echo's microphone at any time with the button on top. Amazon also claims it safeguards protected health information received through HIPAA-eligible Alexa skill interactions. Both of the new Alexa Smart Properties solutions will roll out in the U.S. starting next month, Amazon says.

An anonymous reader quotes a report from The Debrief: How do we how know to speak and to read? These essential questions led to new research from the Massachusetts Institute of Technology that uses AI models to examine how and why our brains understand language. Oddly enough, your brain may work just like your smartphone's autocorrect feature. The new study, published in the Proceedings of the National Academy of Sciences, shows that the function of these AI language models resembles the method of language processing in the human brain, suggesting that the human brain may use next-word prediction to drive language processing.

In this new study, a team of researchers at MIT analyzed 43 different language models, many of which were optimized for next-word prediction. These models include the GPT-3 (Generative Pre-trained Transformer 3), which can generate realistic text when given a prompt, or other ones designed to provide a fill-in-the-blanks function. Researchers presented each model with a string of words to measure the activity of its neural nodes. They then compared these patterns to activity in the human brain, measured when test subjects performed language tasks like listening, reading full sentences, and reading one word at a time. The study showed that the best performing next-word prediction models had activity patterns that bore the most resemblance to those of the human brain. In addition, activity in those same models also correlated with human behavioral measures, such as how fast people could read the text.

The new study results suggest that next-word prediction is one of the key functions in language processing, supporting a previously proposed hypothesis but has yet to be confirmed. Scientists have not found any brain circuits or mechanisms that conduct that type of processing. Moving forward, the researchers plan to build variants of the next-word prediction models to see how small changes between each model affect their processing ability. They also plan to combine these language models with computer models developed to perform other brain-like tasks, such as perception of the physical world.

Time was found to flow differently between the top and bottom of a single cloud of atoms. Physicists hope that such a system will one day help them combine quantum mechanics and Einstein's theory of gravity. From a report: The infamous twin paradox sends the astronaut Alice on a blazing-fast space voyage. When she returns to reunite with her twin, Bob, she finds that he has aged much faster than she has. It's a well-known but perplexing result: Time slows if you're moving fast. Gravity does the same thing. Earth -- or any massive body -- warps space-time in a way that slows time, according to Albert Einstein's general theory of relativity. If Alice lived her life at sea level and Bob at the top of Everest, where Earth's gravitational pull is slightly weaker, he would again age faster. The difference on Earth is modest but real -- it's been measured by putting atomic clocks on mountaintops and valley floors and measuring the difference between the two.

Physicists have now managed to measure this difference to the millimeter. In a paper posted earlier this month to the scientific preprint server arxiv.org, researchers from the lab of Jun Ye, a physicist at JILA in Boulder, Colorado, measured the difference in the flow of time between the top and the bottom of a millimeter-tall cloud of atoms. The work is a step toward studying physics at the intersection of general relativity and quantum mechanics, two theories that are famously incompatible. The new clock takes a fundamentally quantum system -- an atomic clock -- and intertwines it with gravity's pull. In the experiment, Ye's team used an optical lattice clock, a cloud of 100,000 strontium atoms that can get tickled by a laser. If the laser's frequency is just right, the electrons orbiting each atom will be excited to a higher, more energetic orbit. Because only a tiny range of laser frequencies motivate the electrons to move, measuring this frequency provides an extremely precise measurement of time. It's like a quantum grandfather clock, where the ticking comes from the oscillations of the laser light rather than the swing of a pendulum.

"A star located 60 million light years away went supernova last year, and astronomers managed to capture all stages of the stellar explosion using telescopes both on the ground and in space," reports Gizmodo.

Long-time Slashdot reader spaceman375 shared Gizmodo's report: This awesome display of astronomical power has yielded a dataset of unprecedented proportions, with independent observations gathered before, during, and after the explosion. It's providing a rare multifaceted view of a supernova during its earliest phase of destruction. The resulting data should vastly improve our understanding of the processes involved when stars go supernova, and possibly lead to an early warning system in which astronomers can predict the timing of such events.

"We used to talk about supernova work like we were crime scene investigators, where we would show up after the fact and try to figure out what happened to that star," Ryan Foley, an astronomer at the University of California, Santa Cruz, and the leader of the investigation, explained in a press release. "This is a different situation, because we really know what's going on and we actually see the death in real time."

Of course, it took 60 million years for the light from this supernova to reach Earth, so it's not exactly happening in "real time," but you get what Foley is saying... Observations of circumstellar material in close proximity to the star were made by Hubble just hours after the explosion, which, wow. The star shed this material during the past year, offering a unique perspective of the various stages that occur just prior to a supernova explosion. "We rarely get to examine this very close-in circumstellar material since it is only visible for a very short time, and we usually don't start observing a supernova until at least a few days after the explosion," said Samaporn Tinyanont, the lead author of the paper, which is set for publication in the Monthly Notices of the Royal Astronomical Society. TESS managed to capture one image of the evolving system every 30 minutes, starting a few days before the explosion and ending several weeks afterward. Hubble joined in on the action a few hours after the explosion was first detected. Archival data dating back to the 1990s was also brought in for the analysis, resulting in an unprecedented multi-decade survey of a star on its way out...

In the press release, the researchers referred to SN 2020fqv as the "Rosetta Stone of supernovas," as the new observations could translate hidden or poorly understood signals into meaningful data.

NASA's Perseverance rover has recorded up to five hours of sounds on the Mars, giving engineers a sense of how the Red Planet sounds different from Earth. Space.com reports: NASA now has a Perseverance rover website filling up with Martian audio, ranging from wind gusts to the sounds of rover driving as it seeks spots to hunt for the signs of life on the Red Planet. In March, we even heard its laser "snapping" (sadly, no pew-pew noise was evident.)

"It's like you're really standing there," Baptiste Chide, a planetary scientist who studies data from the Perseverance microphones, said in a statement from NASA's Jet Propulsion Laboratory (JPL). "Martian sounds have strong bass vibrations, so when you put on headphones, you can really feel it. I think microphones will be an important asset to future Mars and solar system science," added Chide, who works at France's Institute of Research in Astrophysics and Planetology. The SuperCam mics have been especially helpful for JPL to learn more about the environment in Jezero Crater, where Perseverance has been roaming for about seven Earth months. In May, Perseverance was able to hear the sound of the Ingenuity drone's rotors buzzing from a distance of 262 feet away. "The audio has been useful for investigations ranging from how sound propagates on Mars, and keeping Perseverance well-maintained," the report adds.

An anonymous reader shares a report: It's safe to assume that few Pornhub visitors are looking for hour-long calculus videos (by a fully-clothed instructor), but Taiwanese math teacher Changhsu puts them there anyway. His channel is filled with over 200 decidedly unsexy chalkboard lessons about topics like differential equations. The 34-year-old math tutor found the YouTube market for math explainers to be saturated, so he decided to expand his reach into Pornhub. He told Mel Magazine that he wants to reach a new market of mathematics learners.

Does a meme a day keep the doctor away? Not quite, but it looks like it might help, according to one recent study. From a report: Researchers with Pennsylvania State University and the University of California Santa Barbara found that memes helped people cope with life during the COVID-19 pandemic, according to a study published this week in the Psychology of Popular Media journal. Researchers found that those who viewed memes -- a type of humor they described as funny or cute pictures that reference pop culture -- reported "higher levels of humor" and more positive feelings, according to a news release from the American Psychological Association, which publishes the journal.

They surveyed 748 people online last December: 72% of those who responded were white, 54% identified as women, 63% didn't hold a college degree, and their ages ranged from 18 to 88, the release states. They were shown a variety of meme types, with different kinds of photos and captions, and asked to rate the cuteness, humor and emotional responses prompted by the materials, as well as how much the memes in question made them think about COVID-19. Those who viewed memes that specifically referenced the pandemic felt less stress than those who viewed non-pandemic-related memes. They also felt more capable of coping with the COVID-19 crisis and were better at processing information, according to the study. And they were also less likely to be stressed about the pandemic than those who didn't view memes related to COVID-19 at all, researchers concluded.

India has administered 1 billion doses of COVID-19 vaccine, officials said Thursday, passing a milestone for the South Asian country where the delta variant fueled its first crushing surge earlier this year. From a report: About 75% of India's total eligible adult population have received at least one dose, while around 30% are fully immunized. The country of nearly 1.4 billion people is the second to exceed a billion cumulative doses after the most populous country China did so in June. Coronavirus cases have fallen sharply in India since the devastating months at the start of the year when the highly transmissible delta variant, first detected in the country a year ago, was infecting hundreds of thousands daily, sending COVID-19 patients into overwhelmed hospitals and filling cremation grounds. Officials have bolstered the vaccination campaign in recent months, which experts say have helped control the outbreak since. The country began its drive in January. Still, there remains a worrying gap between those who have received one shot and those fully immunized. Ramping up the second dose is "an important priority," V K Paul, the head of the country's COVID-19 taskforce, said at a briefing last week.

Nanoracks, Voyager Space and Lockheed Martin announced today (Oct. 21) that they plan to get a free-flying private space station up and running in low Earth orbit (LEO) by 2027. Space.com reports: The outpost, called Starlab, is envisioned to be a tourist destination as well as a research and manufacturing hub that helps foster the growth of an off-Earth economy. "To meet U.S. government, international space agency and commercial needs in space, these industry leaders will develop Starlab specifically to enable the growing space economy and meet pent-up customer demand for space services such as materials research, plant growth and astronaut activity," the three companies said in a press release.

The four-person Starlab station will be lofted in a single launch, which is expected to take place in 2027. The outpost will feature a habitat module with 12,000 cubic feet (340 cubic meters) of internal volume, a power and propulsion element, a laboratory setup and a large external robotic arm to service payloads and cargo, according to Nanoracks' Starlab page. For comparison, the International Space Station (ISS) has 32,333 cubic feet (916 cubic meters) of internal volume, which is equivalent to that of a Boeing 747 jet.

Scientists have used a new form of hardened wood to create a steak knife that is nearly three times sharper than a stainless steel dinner table knife. It can even be washed in the dishwasher! New Atlas reports: This hardy new form of wood is the handiwork of scientists at the University of Maryland, who set out to supercharge the material's natural strength, which lies in the cellulose packed inside. Cellulose is the primary component of wood, accounting for 40 to 50 percent of the material, and itself has a higher strength-to-density ratio than many engineered materials, including ceramics, metals and polymers. But the remainder of wood, made up of the binding materials hemicellulose and lignin, dilutes its overall strength and limits its applications. The authors of the study set out remove these weaker parts of the wood while preserving the cellulose structures.

"It's a two-step process," says senior author Teng Li. "In the first step, we partially delignify wood. Typically, wood is very rigid, but after removal of the lignin, it becomes soft, flexible, and somewhat squishy. In the second step, we do a hot press by applying pressure and heat to the chemically processed wood to densify and remove the water." The hardened wood was then carved into a knife and coated in mineral oil, which counters the natural tendency of cellulose to absorb water, extending the lifespan of the material, preserving the blade's sharpness and making it dishwasher safe. According to the team, the hard wood knife is almost three times sharper than a stainless steel dinner table knife and is 23 times times harder than natural wood. It was used to cut through a medium-well done steak with ease. The team was also able to produce nails using the new hard wood. Not only were they rust-resistant but they were just as sharp as regular steel nails.

The research was published in the journal Matter.

The Food and Drug Administration approved a virtual reality-based treatment for children with the visual disorder amblyopia, or lazy eye, the company behind the therapy announced today. The Verge reports: Luminopia's approach uses TV and movies to develop the weaker eye and train the eyes to work together. Patients watch the show or movie through a headset that shows the images to each eye separately. The images shown to the stronger eye have a lower contrast, and the images are presented with overlays that force the brain to use both eyes to see them properly. Kids using the therapy and wearing glasses had more improvement in their vision than a similar group of kids who did not use the therapy and just wore corrective glasses full time during a clinical trial of the technology. After 12 weeks watching the shows one hour per day, six days per week, 62 percent of kids using the treatment had a strong improvement in their vision. Only around a third of the kids in the comparison group had similar improvements over the course of the 12 weeks.

Luminopia has over 700 hours of programming in its library, and it partnered with kids' content distributors like Nelvana and Sesame Workshop to develop the tool. The authors of the clinical trial wrote that they think that the option to pick popular videos might be one reason users stuck to the program -- people followed the treatment plan 88 percent of the time. Less than 50 percent of patients stick to eye patches or blurring drops. With the approval, Luminopia joins only a handful of companies with clearance to offer a digital therapeutic as a prescription treatment for medical conditions. Last year, the FDA approved a prescription video game called EndeavorRx, which treats ADHD in kids between eight and 12 years old. Luminopia said in a statement that it plans to launch the treatment in 2022.

Even as world leaders vow to take stronger action on climate change, many countries are still planning to dramatically increase their production of oil, gas and coal in the decades ahead, potentially undermining those lofty pledges, according to a United Nations-backed report released Tuesday. From a report: The report looked at future mining and drilling plans in 15 major fossil fuel producing countries, including the United States, Saudi Arabia, Russia, Canada, China, India and Norway. Taken together, those countries are currently planning to produce more than twice as much oil, gas and coal through 2030 as would be needed if governments want to limit warming to 1.5 degrees Celsius (2.7 degrees Fahrenheit) above preindustrial levels. Scientists and world leaders increasingly say that holding global warming to 1.5 degrees Celsius is crucial if humanity wants to avoid the most catastrophic consequences of climate change, such as ever-deadlier heat waves, large scale flooding and widespread extinctions. The world has already heated up roughly 1.1 degrees since the Industrial Revolution.

But the planned global expansion of fossil fuel extraction clashes sharply with those climate goals, the report found. If the world remains awash in oil, gas and coal for decades to come, then many countries could find it more difficult to shift to cleaner sources of energy. At the same time, many of the oil wells and coal mines now being approved and developed could prove deeply unprofitable if demand for fossil fuels shrinks, creating economic disruption. By 2030, the report found, the world's nations are planning to produce 240 percent more coal, 57 percent more oil and 71 percent more natural gas than would be needed to limit warming to 1.5 degrees Celsius.

An anonymous reader quotes a report from NPR: The World Health Organization has hired the company, called Afrigen Biologics and Vaccines, as part of a $100 million plan to figure out how to make an mRNA vaccine against COVID that is as close as possible to the version produced by Moderna. Until recently, Afrigen specialized in developing veterinary vaccines using fairly traditional methods. Now, says Afrigen's managing director, Petro Treblanche, the company's labs are a hive of research into the cutting-edge technology behind mRNA vaccines. Once Afrigen has sorted out all the complicated steps to make Moderna's shot on an industrial scale, WHO and other partners plan to pay Afrigen to become a teaching center.

"We call it a 'technology transfer hub,' " says Martin Friede, the WHO official in charge of this effort. "Manufacturers from around the world will be invited to come and learn the entire process. So this will accelerate the availability of the technology, not to one manufacturer but to many manufacturers." Friede says it makes sense to set up more manufacturers of mRNA vaccines in particular because the technology appears so effective against COVID -- and because it shows promise against other diseases including malaria and tuberculosis. As to why WHO has chosen to try to copy Moderna rather than the other mRNA COVID vaccine, which is made by Pfizer BioNTech, Friede says the choice was practical. "Moderna has reiterated on several occasions that they will not enforce their intellectual property during the pandemic," says Friede. In other words, a manufacturer probably won't face a lawsuit for producing a vaccine that's virtually identical to Moderna's. Also, says Friede, compared to Pfizer's vaccine, there just happens to be a lot more information in the public domain about how Moderna's vaccine is made.

But Afrigen's Petro Treblanche says there are still a lot of unknowns. Take Moderna's patent. "It's written very carefully and cleverly to not disclose absolutely everything," says Treblanche. So while Afrigen has been able to determine most of the equipment and specialized ingredients that are needed, "what we don't know is the exact concentrations," says Treblanche. "And we don't know some of the mixing times -- some of the conditions of mixing and formulating." A particularly vexing question is how to replicate Moderna's "lipid nano-particle" -- a special casing around the mRNA strand at the heart of the vaccine that keeps it stable as it travels through the body to, as Treblanche puts it, "essential places like the spleen and lymph nodes." "We understand other encapsulations," says Treblanche. But for all the expertise at Afrigen, "my team has never formulated a liquid nanoparticle."

U.S. regulators on Wednesday signed off on extending COVID-19 boosters to Americans who got the Moderna or Johnson & Johnson vaccine and said anyone eligible for an extra dose can get a brand different from the one they received initially. The Associated Press reports: The Food and Drug Administration's decisions mark a big step toward expanding the U.S. booster campaign, which began with extra doses of the Pfizer vaccine last month. But before more people roll up their sleeves, the Centers for Disease Control and Prevention will consult an expert panel later this week before finalizing official recommendations for who should get boosters and when.

The latest moves would expand by tens of millions the number of Americans eligible for boosters and formally allow "mixing and matching" of shots -- making it simpler to get another dose, especially for people who had a side effect from one brand but still want the proven protection of vaccination. Specifically, the FDA authorized a third Moderna shot for seniors and others at high risk from COVID-19 because of their health problems, jobs or living conditions -- six months after their last shot. One big change: Moderna's booster will be half the dose that's used for the first two shots, based on company data showing that was plenty to rev up immunity again. For J&J's single-shot vaccine, the FDA said all U.S. recipients should get a second dose at least two months following their initial vaccination.

For the first time, a pig kidney has been transplanted into a human without triggering immediate rejection by the recipient's immune system, a potentially major advance that could eventually help alleviate a dire shortage of human organs for transplant. Reuters reports: The procedure done at NYU Langone Health in New York City involved use of a pig whose genes had been altered so that its tissues no longer contained a molecule known to trigger almost immediate rejection. The recipient was a brain-dead patient with signs of kidney dysfunction whose family consented to the experiment before she was due to be taken off of life support, researchers told Reuters. For three days, the new kidney was attached to her blood vessels and maintained outside her body, giving researchers access to it.

Test results of the transplanted kidney's function "looked pretty normal," said transplant surgeon Dr. Robert Montgomery, who led the study. The kidney made "the amount of urine that you would expect" from a transplanted human kidney, he said, and there was no evidence of the vigorous, early rejection seen when unmodified pig kidneys are transplanted into non-human primates. The recipient's abnormal creatinine level - an indicator of poor kidney function - returned to normal after the transplant, Montgomery said.

Montgomery's team theorized that knocking out the pig gene for a carbohydrate that triggers rejection - a sugar molecule, or glycan, called alpha-gal - would prevent the problem. The genetically altered pig, dubbed GalSafe, was developed by United Therapeutics Corp's Revivicor unit. It was approved by the U.S. Food and Drug Administration in December 2020, for use as food for people with a meat allergy and as a potential source of human therapeutics. Other researchers are considering whether GalSafe pigs can be sources of everything from heart valves to skin grafts for human patients.

An anonymous reader quotes a report from People: Doctors around the world are seeing a rise in cases of tic-like behaviors in teen girls, which they believe could be caused by watching TikTok videos about Tourette syndrome. Pediatric hospitals have reported an increase in teen girls coming in after developing tics, sudden twitches or noises that are a common symptom of Tourette syndrome, during the pandemic. The sudden rise is unusual, with tics typically occurring in boys, not girls. Experts in the U.S., Canada, the U.K. and Australia studied the patients for months and consulted between hospitals, finding that the common factor between the girls was an interest in watching TikTok videos from influencers who said they have Tourette syndrome, The Wall Street Journal reported.

According to the outlet, Texas Children's Hospital said they've had around 60 teens come in with tics since March 2020, compared to just one or two a year before then, while at Johns Hopkins University Tourette's Center, the number of patients reporting tic-like behaviors has jumped from 2 to 3% a year to 10 to 20%. And Rush University Medical Center in Chicago had 20 patients with tics over just four months this year, compared to 10 all of last year. Researchers from pediatric hospitals around the world found that referrals for tic-like behaviors soared during the pandemic, especially in girls aged 12 to 25, they wrote in a study published in August in the journal Movement Disorders. Since March 2020, referrals in the U.S., Canada, the U.K., Germany and Australia went from 1 to 2% to 20 to 35%. The researchers wrote that they've seen a "similarity between the tics or tic-like behaviors shown on social media and the tic-like behaviors of this group of patients." Another group of doctors say they "believe this to be an example of mass sociogenic illness," where people are copying the behaviors they see in the videos. Doctors recommend therapy to treat kids experiencing these symptoms. They also advise parents to require their teens to "take a social media break or block Tourette videos on their TikTok account," adds the report.

How Natalie Grams, who once abandoned her medical education to study alternative therapies, became Germany's most prominent homeopathy skeptic. From a report: The pseudoscience of homeopathy was invented in Germany in the 18th century by a maverick physician named Samuel Hahnemann. His theory was based on the ancient principle of like cures like -- akin to the mechanism behind vaccines. The remedies Hahnemann developed, meant to help the body heal on its own, originate as substances that with excess exposure (like pollen) can make a patient ill (in this case, with hay fever) -- or kill them: Arsenic is used as a treatment for digestive problems, and the poisonous plant belladonna is meant to counteract pain and swelling. These substances are diluted -- again and again -- and shaken vigorously in a process called "potentization" or "dynamization." The resultant remedies typically contain a billionth, trillionth, orâ...âwellâ...âa zillionth (10 to the minus 60th, if you're counting) of the original substance.

Today, homeopathy is practiced worldwide, particularly in Britain, India, the U.S. -- where there's a monument to Hahnemann on a traffic circle six blocks north of the White House -- and, especially, Germany. Practitioners, however, differ greatly in their approach. Some only prescribe remedies cataloged in homeopathic reference books. Others take a more metaphoric bent, offering treatments that contain a fragment of the Berlin Wall to cure feelings of exclusion and loneliness or a powder exposed to cellphone signals as protection from radiation emitted by mobile handsets. Grams, the daughter of a chemist, first turned to homeopathy in 2002. While she was attending medical school to become a surgeon, a highway accident left her car in the ditch with the windshield shattered. Grams walked away unhurt, but she soon began to suffer from heart palpitations, panic attacks, and fainting spells that doctors couldn't explain. Her roommate suggested she visit a heilpraktiker, a type of German naturopath that offers alternative therapies ranging from acupuncture and massage to reiki and homeopathy.

Homeopaths typically spend a lot of time with patients, asking not just about symptoms but also about emotions, work, and relationships. This is all meant to find the root cause of a patient's suffering and is part of its appeal. The heilpraktiker asked Grams about her feelings and the accident, things she hadnâ(TM)t spoken about with her doctors -- or anyone -- thinking they weren't important in understanding what was wrong. The heilpraktiker prescribed her belladonna globules and recommended she visit a trauma therapist. Steadily, her symptoms fell away. She was healed. Soon after, Grams dropped the idea of becoming a surgeon, opting for a future as a general practitioner while taking night courses in alternative therapies. After completing her medical degree, she began a five-year residency to qualify as a GP. But three years in, Grams abandoned conventional medicine and began an apprenticeship with a homeopath near Heidelberg.

People with mild or moderate hearing loss could soon be able to buy hearing aids without a medical exam or special fitting, under a new rule being proposed by the Food and Drug Administration. The agency says 37.5 million American adults have difficulties hearing. From a report: "Today's move by FDA takes us one step closer to the goal of making hearing aids more accessible and affordable for the tens of millions of people who experience mild to moderate hearing loss," Health and Human Services Secretary Xavier Becerra said as he announced the proposed rule on Tuesday. There is no timeline yet for when consumers might be able to buy an FDA-regulated over-the-counter hearing aid. The proposed rule is now up for 90 days of public comment. The Hearing Loss Association of America, a consumer advocacy group, welcomed the proposal. "This is one step closer to seeing OTC hearing devices on the market," Barbara Kelley, HLAA's executive director said in an email to NPR. "We hope adults will be encouraged to take that important first step toward good hearing health."

knaapie writes: It may still be fuel for hot debate on social media, but 99.9% of scientist actually agree on the fact that humans are altering the climate. The Guardian reports that the degree of scientific certainty about the impact of greenhouse gases is now similar to the level of agreement on evolution and plate tectonics, the authors say, based on a survey by Cornell University of nearly 90,000 climate-related studies. This means there is practically no doubt among experts that burning fossil fuels, such as oil, gas, coal, peat and trees, is heating the planet and causing more extreme weather.

"It is really case closed. There is nobody of significance in the scientific community who doubts human-cased climate change," said the lead author, Mark Lynas, a visiting fellow at Cornell University. In contrast, the paper cites a 2016 study by the Pew Research Center that found only 27% of US adults believed that "almost all" scientists agreed the climate emergency was caused by human activity. And according to the Center for American Progress, 30 US senators and 109 representatives "refuse to acknowledge the scientific evidence of human-caused climate change." Several big media organisations and social networks also promote climate-sceptical views that have little or no basis in science. Lynas said the study should encourage them to review their policies. "This puts the likes of Facebook and Twitter in a quandary. It is pretty similar to vaccine misinformation; they both lack a basis in science and they both have a destructive impact on society. Social networks that allow climate misinformation to spread need to look at their algorithms and policies or to be forced to do so by regulators."

Albert Einstein's theory of general relativity has aced another test. From a report: Following nearly 3 decades of monitoring, researchers have detected a subtle shift in the orbit of the closest known star to the supermassive black hole at the center of the Milky Way -- and the movement matches Einstein's theory precisely. The star, known as S2, follows an elliptical 16-year orbit. It made a close approach -- within 20 billion kilometers -- to our black hole, Sagittarius A*, last year. If Isaac Newton's classic description of gravity holds true, S2 should then continue along exactly the same path through space as on its previous orbit. But it didn't. Instead, it followed a slightly diverging path, the axis of its ellipse shifting slightly, a team using the European Southern Observatory's Very Large Telescope reports today in Astronomy & Astrophysics. The phenomenon, known as Schwarzschild precession, would, in time, cause S2 to trace out a spirographlike flower pattern in space -- as general relativity predicts.