Astronomers using the James Webb Space Telescope have discovered Zhulong, the most distant grand-design spiral galaxy identified so far, located at a redshift of approximately 5.2. Phys.Org reports: The galaxy was named Zhulong, after a giant red solar dragon and god in Chinese mythology. [...] Its mass was found to be comparable to that of the Milky Way, which is relatively high for a galaxy that formed within one billion years after the Big Bang, as the redshift indicates. The study found that Zhulong has a classical bulge and a large face-on stellar disk with spiral arms extending across 62,000 light years. The spectral energy distribution (SED) analysis points to a quiescent-like core and a star-forming stellar disk. Furthermore, it turned out that compared to the stellar disk, the center core of Zhulong is red and has the highest stellar mass surface densities measured among quiescent galaxies. The core is quiescent, which is consistent with the expectations of inside-out galaxy growth and quenching.

The study also found that although the disk is still forming stars, Zhulong has a relatively low overall star-formation rate -- at a level of 66 solar masses per year. The baryons-to-stars conversion efficiency was calculated to be approximately 0.3, which is about 1.5 times higher than even the most efficient galaxies at later epochs. These results suggest that Zhulong must have been forming stars very efficiently and is in the transformation phase from star-forming to quiescence. In concluding remarks, the authors of the paper note that Zhulong appears to be the most distant spiral galaxy discovered to date. The properties of this galaxy seem to suggest that mature galaxies emerged much earlier than expected in the first billion years after the Big Bang. The findings have been published on the pre-print server arXiv.

An anonymous reader quotes a report from Ars Technica, written by Jennifer Ouellette: Over the holiday weekend, all but one member of the editorial board of Elsevier's Journal of Human Evolution (JHE) resigned "with heartfelt sadness and great regret," according to Retraction Watch, which helpfully provided an online PDF of the editors' full statement. It's the 20th mass resignation from a science journal since 2023 over various points of contention, per Retraction Watch, many in response to controversial changes in the business models used by the scientific publishing industry. "This has been an exceptionally painful decision for each of us," the board members wrote in their statement. "The editors who have stewarded the journal over the past 38 years have invested immense time and energy in making JHE the leading journal in paleoanthropological research and have remained loyal and committed to the journal and our authors long after their terms ended. The [associate editors] have been equally loyal and committed. We all care deeply about the journal, our discipline, and our academic community; however, we find we can no longer work with Elsevier in good conscience."

The editorial board cited several changes made over the last ten years that it believes are counter to the journal's longstanding editorial principles. These included eliminating support for a copy editor and a special issues editor, leaving it to the editorial board to handle those duties. When the board expressed the need for a copy editor, Elsevier's response, they said, was "to maintain that the editors should not be paying attention to language, grammar, readability, consistency, or accuracy of proper nomenclature or formatting." There is also a major restructuring of the editorial board underway that aims to reduce the number of associate editors by more than half, which "will result in fewer AEs handling far more papers, and on topics well outside their areas of expertise." Furthermore, there are plans to create a third-tier editorial board that functions largely in a figurehead capacity, after Elsevier "unilaterally took full control" of the board's structure in 2023 by requiring all associate editors to renew their contracts annually -- which the board believes undermines its editorial independence and integrity.

In-house production has been reduced or outsourced, and in 2023 Elsevier began using AI during production without informing the board, resulting in many style and formatting errors, as well as reversing versions of papers that had already been accepted and formatted by the editors. "This was highly embarrassing for the journal and resolution took six months and was achieved only through the persistent efforts of the editors," the editors wrote. "AI processing continues to be used and regularly reformats submitted manuscripts to change meaning and formatting and require extensive author and editor oversight during proof stage." In addition, the author page charges for JHE are significantly higher than even Elsevier's other for-profit journals, as well as broad-based open access journals like Scientific Reports. Not many of the journal's authors can afford those fees, "which runs counter to the journal's (and Elsevier's) pledge of equality and inclusivity," the editors wrote. The breaking point seems to have come in November, when Elsevier informed co-editors Mark Grabowski (Liverpool John Moores University) and Andrea Taylor (Touro University California College of Osteopathic Medicine) that it was ending the dual-editor model that has been in place since 1986. When Grabowki and Taylor protested, they were told the model could only remain if they took a 50 percent cut in their compensation.

Researchers at Cornell University have developed a set of low-cost VR goggles for lab mice. Called MouseGoggles, the VR headsets will allows scientists to provide immersive virtual environments for the mice while capturing fluorescent images of the rodents' brain activity. Phys.Org reports: The goggles -- which dwarf the tiny mice in size -- were built using low-cost, off-the-shelf components like smartwatch displays and tiny lenses, researchers said. [...] About a decade ago, researchers began rigging up clunky projector screens for mice as a means of creating virtual reality environments, but these devices frequently created so much light and noise that they spoiled experiments, researchers said. "The more immersive we can make that behavioral task, the more naturalistic of a brain function we're going to be studying," senior researcher Chris Schaffer, a professor of biomedical engineering at Cornell, said in a news release.

The new VR setup, called MouseGoggles, requires a mouse to stand on a ball-shaped treadmill with its head fixed in place. The headset is attached to its head and held in place with a rod while the mouse skitters about on the treadmill. To see if the headset worked, researchers projected the image of an expanding dark blotch that appeared to be approaching the mice. "When we tried this kind of a test in the typical VR setup with big screens, the mice did not react at all," Isaacson said. "But almost every single mouse, the first time they see it with the goggles, they jump. They have a huge startle reaction. They really did seem to think they were getting attacked by a looming predator."

The researchers also examined two key brain regions to make sure the VR images were working properly. Results from the primary visual cortex confirmed that the goggles form sharp, high-contrast images that mice can see, and readings from the hippocampus confirmed that mice are successfully mapping the virtual environment provided them. These VR goggles could be used to help study brain activity that occurs as mammals -- be they mice or men -- move around their environment, potentially giving researchers new insights into disorders like Alzheimer's disease, the study's authors said. The research has been published in the journal Nature Methods.

An anonymous reader shared this report from the Wall Street Journal: The rich get richer — and older. People with high salaries and net worth tend to live longer lives, research shows. Once Americans make it to their late 50s, the wealthiest 10% live to a median age of around 86 years, roughly 14 years longer than the least wealthy 10%, according to a study published earlier this year in JAMA Internal Medicine. People with more money can afford healthier food, more healthcare and homes in safer, less-polluted neighborhoods, says Kathryn Himmelstein, a co-author of the study and a medical director at the Boston Public Health Commission.

Though you can't add more months or years to your online shopping cart yet, health and aging researchers say there are ways to spend money to improve your chances of living longer. They suggest favoring purchases that help you track your health, stay active and reduce stress. "We know the things that help us age better, and everyone's always disappointed when you tell them," says Andrew Scott, director of economics at the Ellison Institute of Technology in Oxford, England. "Eat less and eat better, sleep more, exercise more and spend time with friends...." But certain gadgets and luxuries can be worth the cost, some researchers say. Devices such as the Apple Watch and Oura Ring can instill healthy habits and catch worrying patterns that might emerge between annual checkups, says Joe Coughlin, the director of the MIT AgeLab... Coughlin says he once went to the emergency room because his Apple Watch detected a spike in his heart rate that he hadn't noticed himself.

"For the superwealthy, suddenly living longer and living better has become the new prestige," Coughlin says. Higher incomes correlate with longer lives, but there are diminishing returns. Each successive jump in pay is linked to smaller boosts in longevity, a 2016 study from the research group Opportunity Insights found... A key to the relationship between income and longevity is that money doesn't just buy stuff that helps you live longer. It also buys time and reduces stress. "If you've got a nice place to live and you don't have to worry about food on the table, you have the mental head space and resources to prioritize your health," says Steven Woolf, a professor at Virginia Commonwealth University School of Medicine... Moreover, many lower-income jobs are more physically taxing and more prone to workplace accidents and exposure to harmful substances.
The article also includes examples of spending that promotes health, including things like home gym equipment and even swing-dancing lessons.

But it also adds that "plenty of things that are good for you don't come with a bill, such as going on a walk or minimizing screen time before bedtime."

When it comes to the possibility of a bird flu outbreak, America's Centers for Disease Control recently issued a statement that the risk to the public "remains low."

But even in the event of a worst-case scenario, New York magazine believes "We may be more equipped for another pandemic than you think..." In 2023, more than half of people surveyed said that their lives had not returned to normal since the COVID outbreak, and a surprising number — 47 percent — said they now believe their lives will never return to normal.

But do we really know how a new pandemic would go and how we would handle it? Things are different this time — and in ways that aren't all bad. Unlike with COVID in the spring of 2020, millions of doses of bird-flu vaccines at various stages of testing sit in government stockpiles, and more are on the way. There are also already tests that work, though these are not broadly available to the public... Recent research suggests that we might actually manage a second pandemic better than we would believe. Despite all the noise to the contrary, a June poll by Harvard's School of Public Health says that Americans overall think the government responses to COVID — asking people to wear masks, pausing indoor dining, requiring health-care workers to get vaccinated — were all good ideas. Although the media tends to paint school closures as radically unpopular, only 44 percent of respondents said they currently think the shutdowns were a mistake.

A growing body of research also suggests that many Americans feel stronger for what we endured during the most extreme days of COVID. Counter to what we like to say about our friends and neighbors and children, the challenge of the pandemic may have benefited some people's mental health. One study found that "children entering the pandemic with clinically meaningful mental-health problems experienced notable improvements in their mental health." (Turns out there's one thing worse than shutting down an American school and that's having to attend it.)
The article also points out that "There is no real information" on the likelihood of a bird-flu virus even crossing over into humans.

And of course, "COVID still kills, with a body count just shy of 50,000 Americans in 2024, and it feels like a stretch to say that Americans are particularly concerned."

The Washington Post shares some good news from 2024: Researchers were able to detect a significant dip in atmospheric levels of hydrochlorofluorocarbons — harmful gases that deplete the ozone layer — for the first time, almost 30 years after countries first agreed to phase out the chemicals.

A new satellite launched in March to track and publicly reveal the biggest methane polluters in the oil and gas industry — an important step in tackling the greenhouse gas that accounts for almost a third of global warming. The NASA/Carbon Mapper satellite, which measures CO2 and methane emissions, also launched, providing detailed images from individual oil and gas facilities across the world.

Back on Earth, the world's largest plant for pulling carbon dioxide out of the atmosphere opened in Iceland. Norway became the first country to have more electric than gas-powered vehicles, while one Japanese island began using a new generation of batteries to help stockpile massive amounts of clean electricity.

There were also small but important victories for animal conservation. The Iberian lynx, a European wildcat once on the brink of extinction, is no longer classed as an "endangered" species — in what experts have hailed as the "greatest recovery of a cat species ever achieved through conservation...."

Despite a large number of powerful tornadoes to hit the United States in early 2024, the death tolls were fortunately not as high as meteorologists feared, in part due to improved forecasting technology.
The article also notes America's Food and Drug Administration approved a new therapy which uses a patients' own cells to attack skin cancer for adults for whom surgery isn't an option. "Experts said the decision could open the door to similar treatments for far more common cancers."

And one more inspiring story from 2024: 105-year-old Virginia Hislop, of Yakima, Washington received her master's degree from Stanford University...

While microplastics seem to be everywhere, CNN reports that scientists in China "have come up with a possible solution: a biodegradable sponge made of squid bones and cotton" (which contain two organic compounds "known for eliminating pollution from wastewater...") They then tested the sponge in four different water samples, taken from irrigation water, pond water, lake water and sea water, and found it removed up to 99.9% of microplastics, according to a study published last month in Science Advances... The sponge created by the Wuhan researchers was able to absorb microplastics both by physically intercepting them and through electromagnetic attraction, the study said.

Previously studied methods for absorbing plastics tend to be expensive and difficult to make, limiting their scalability. Last year, researchers in Qingdao, China developed a synthetic sponge made of starch and gelatin designed to remove microplastics from water, though its efficacy varied depending on water conditions. The low cost and wide availability of both cotton and squid bones mean [the Chinese researchers' sponge] "has great potential to be used in the extraction of microplastic from complex water bodies," according to the study.

Shima Ziajahromi, a lecturer at Australia's Griffith University who studies microplastics, called the squid-cotton-sponge method "promising" and said it could be an effective way to "clean up the high risk and vulnerable aquatic ecosystem." However, the study's authors did not address whether the sponge can remove microplastics that sink to the sediment, which is the majority of microplastics in our waters, said Ziajahromi, who was not involved in the study. Another "critical issue" is the proper disposal of the sponges, Ziajahromi said. "Although the material is biodegradable, the microplastics it absorbs need to be disposed of properly," she said. "Without careful management, this process risks transferring microplastics from one ecosystem to another."

Ultimately, Ziajahromi added, minimizing plastic pollution is in the first place should remain a "top priority."

A 9-year-old girl born without a left hand had "started asking for a robotic arm to help her feel more confident," her mother told the Washington Post. So her parents met with a consultant from Open Bionics, which fits people with lightweight, 3D-printed prostheses that function more like a natural arm and hand — known as Hero Arms. The bionic arms are manufactured in Britain and cost about $24,000, but the Batemans were hopeful that their health insurance company, Select Health, would pay for one for [their 9-year-old daughter] Remi. Remi said she tried using one of the robotic arms for a few days in Colorado and was thrilled to cut her food with a knife and fork for the first time and carry plates with two hands. "I loved it so much — I could function like a full human," she said. "I was able to steal my dad's hat. When they fit me for my arm, I told them I wanted it to be pink."

On Oct. 1, the Batemans sent a prescription for the robotic arm and office notes from Remi's pediatrician to Select Health for approval. One week later, their request was denied, Jami Bateman said. "They sent us a letter saying it was not medically necessary for Remi to have a Hero Arm and that it was for cosmetic use only," she said. "We appealed twice and were again denied."

"It was very upsetting, and Remi cried when I told her, because we'd all been so hopeful," Bateman added. "It broke our hearts." In mid-December, a frustrated Jami Bateman tried an approach she'd seen other people use when their health insurance failed them: She started a GoFundMe for her daughter, hoping to purchase a robotic arm through the kindness of strangers.... Bateman was stunned when friends and strangers chipped in more than $30,000 in just a few days, surpassing the family's $24,000 goal. People who donated understood the Batemans' predicament, and many were furious on their behalf.

As donations poured in, the Batemans received a call from somebody else who wanted to help. Andy Schoonover is the CEO of CrowdHealth, a subscriber-based resource that helps people negotiate lower costs for medical bills. He told the family on Dec. 16 that his company wanted to pay the entire cost of Remi's bionic arm. "We were looking for some ways to help people during the holiday season, and I stumbled upon Remi's story on social media," Schoonover said. "We were honored to help her out...."

Remi quickly came up with an idea. "She came to me and said, 'Mom, I know how it feels to have one hand. Is there someone else we can help?" Bateman recalled. She said she contacted Open Bionics and learned there was a long list of children who had been turned down for Hero Arms by their health insurance companies for the same reason Remi was denied...
Somewhere in Maryland, the mother of a 9-year-old boy born without a left hand suddenly got a surprise phone call explaining Remi's decision. "I was so proud of Remi that I immediately started crying," she said. "She wanted to give my son an opportunity that I was unable to give him. It just touched my heart."

They had been trying to raise money by running a lemonade stand. But yesterday Remi's GoFundMe page posted an update. The 9-year-old boy's arm had now been paid for.

"And maybe, if more donations roll in we can help a third child!"

Long-time Slashdot reader schwit1 writes: The Dubai-based startup LEAP71, focused on using AI software to quickly develop rocket engine designs it can then 3D print, has successfully test fired a prototype aerospike engine on December 18, 2024 during a static fire test campaign conducted in the United Kingdom.
Along the way they tackled a problem with bell-shaped rocket nozzles, writes New Atlas. "A rocket that works very well on liftoff will work less well as it rises in the atmosphere and the air pressure decreases. This is why second- and third-stage rocket engines are different from those of the first stage." Ideally, engineers want an engine that can adjust itself automatically to changes in air pressure. An aerospike does this by shaping the engine into a spike or plug with a curve like that of the inside of a rocket bell. As the combustion gases flow from the engine over the spike, the curve acts as one side of the bell and the surrounding air as the outside curve. As the air pressure changes, so does the shape of the virtual bell. There have been a number of aerospike engines developed since the 1950s and one has actually gone airborne, but there's still a long way to go when it comes to turning a promising idea into a practical space engine.

LEAP 71's contribution to the effort is to apply its Noyron Large Computational Engineering Model to the problem. It's an AI programmed and trained by aerospace experts to take a given set of input parameters and use them to create a design that meets those parameters by inferring physical interactions of various factors, including thermal behaviors and projected performance. The results of this are then fed back into the AI model to fine tune it as it presents computed performance parameters, the geometry of the engine, the parameters of the manufacturing process, and other details.
"Despite their clear advantages, Aerospikes are not used in space access today," LEAP 71's co-founder said in a statement. "We want to change that. Noyron allows us to radically cut the time we need to re-engineer and iterate after a test and enables us to converge rapidly on an optimal design."

Aerospikes "are more compact and significantly more efficient across various atmospheric pressures, including the vacuum of space," the company said this week — announcing the successful hot-firing of their Aerospike engine, and calling it "one of the most advanced and elusive rocket engines ever created..." By leveraging the power of Noyron's computational AI, the thruster was developed in a matter of weeks, manufactured as a monolithic piece of copper through industrial 3D printing, and put on the test stand, where it worked successfully on the first attempt...

The Aerospike was fired on December 18th, 2024, as part of a four-engines-in-four-days campaign conducted by LEAPâ71 at Airborne Engineering in Westcott, UK. The company will process the collected data to fine-tune Noyron for the next iteration of engines and continue testing in 2025, with the goal of making Aerospikes a viable option for modern spacecraft.

ewhac (Slashdot reader #5,844) writes: Retraction Watch is reporting that the entire editorial staff (save one) for the Journal of Human Evolution has resigned in protest over creeping harmful changes imposed by its publisher, Elsevier.

In an open letter posted to social media, the editors recount Elsevier's changes to their journal's scientific and editorial processes (inserting itself into those processes) — along with staff and budget reductions negatively impacting their ability to review and publish submissions. The letter alleges that when the editorial board complained of Elsevier's eliminating support for a copy editor, Elsevier responded that the editors shouldn't be paying attention to language, grammar, readability, consistency, or accuracy of proper nomenclature or formatting. When the editors fiercely protested Elsevier's ending of JHE's dual-editor model, Elsevier allegedly responded that it would support a dual-editor model by cutting the compensation rate by half.

But perhaps most damning is a footnote revealing Elsevier's use of so-called "AI" in the publication process. "In fall of 2023, for example, without consulting or informing the editors, Elsevier initiated the use of AI during production, creating article proofs devoid of capitalization of all proper nouns (e.g., formally recognized epochs, site names, countries, cities, genera, etc.) as well italics for genera and species. These AI changes reversed the accepted versions of papers that had already been properly formatted by the handling editors. This was highly embarrassing for the journal and resolution took six months and was achieved only through the persistent efforts of the editors. AI processing continues to be used and regularly reformats submitted manuscripts to change meaning and formatting and require extensive author and editor oversight during proof stage."

Except for one unnamed associate editor, the editorial board for the Journal of Human Evolution determined that the situation with Elsevier was no longer tenable, and resigned.

An anonymous reader quotes a report from The Independent: The two professions associated with the lowest levels of death due to Alzheimer's disease may be surprising. Taxi and ambulance drivers were found to have the lowest proportion of deaths of more than 440 occupations that were considered in a new observation-based study from Massachusetts physicians. Alzheimer's disease is a type of dementia that affects memory, thinking, and behavior. It impacts millions of Americans and is one of the top 10 causes of death in the US.

While the study's findings cannot confirm a direct link between the professions and reduced risk, its researchers said they raise the possibility that memory-intensive driving occupations could be associated with some protection. "We view these findings not as conclusive, but as hypothesis-generating," they said, noting that no resolute conclusions can be drawn about cause and effect. The jobs require frequent spatial and navigational processing: the ability to sense and incorporate information about the location of objects around them. Although, the trend was not seen in other related jobs, like driving a bus or piloting an aircraft. It was also not seen in other forms of dementia, which suggests changes in the hippocampus region of the brain -- which is used for spatial memory and navigation -- may account for the reduction.

The hippocampus, located deep within the brain, has been shown to be enhanced in London taxi drivers compared to the general population. The region is also one of the parts of the brain involved in the development of Alzheimer's disease. [...] The authors acknowledged that there were limitations, including that individuals who are at higher risk of developing Alzheimer's disease may be less likely to enter driving occupations. However, they said this is unlikely because disease symptoms typically develop after working age. "Further research is necessary to definitively conclude whether the spatial cognitive work required for these occupations affects the risk of death from Alzheimer's disease and whether any cognitive activities can be potentially preventive," they said. The research has been published in the journal The BMJ.

BrianFagioli shares a report from BetaNews: It might sound unbelievable, but the human brain processes information at just 10 bits per second! Yes, folks, that's slower than the internet speeds many of us endured during the early days of dial-up. While our senses take in billions of bits of data every second, our brain intelligently sifts through the chaos, letting through only what's important.

This is no accident. Researchers Jieyu Zheng and Markus Meister explain in their study, The Unbearable Slowness of Being, that the brain is built this way for survival. Instead of getting overwhelmed by a flood of details, the brain has a system to focus on what matters most. It ensures we act quickly and effectively without being bogged down by unnecessary information. [...] The slow pace of the human brain might seem like a drawback in today's fast-paced world, but it has been sufficient for survival throughout human history. Evolution prioritized efficiency over speed, enabling the brain to focus on critical tasks without wasting energy. While machines continue to outpace us in raw processing power, the human brain remains unmatched in its ability to prioritize and adapt. The study raises an important question: Why does a brain capable of such complexity operate at such a slow rate?

Following its record-breaking closest approach to the Sun, NASA's Parker Solar Probe has transmitted a beacon tone back to Earth indicating it's in good health and operating normally. NASA: The mission operations team at the Johns Hopkins Applied Physics Laboratory (APL) in Laurel, Maryland received the signal just before midnight EST, on the night of Dec. 26. The team was out of contact with the spacecraft during closest approach, which occurred on Dec. 24, with Parker Solar Probe zipping just 3.8 million miles from the solar surface while moving about 430,000 miles per hour.

The spacecraft is expected to send back detailed telemetry data on its status on Jan. 1. This close-up study of the Sun allows Parker Solar Probe to take measurements that help scientists better understand how material in this region gets heated to millions of degrees, trace the origin of the solar wind (a continuous flow of material escaping the Sun), and discover how energetic particles are accelerated to near light speed. Previous close passes have helped scientists pinpoint the origins of structures in the solar wind and map the outer boundary of the Sun's atmosphere.

U.S. biotech startup Loyal plans to launch a lifespan-extending drug for dogs in early 2025, potentially offering insights into human longevity. The San Francisco-based company has secured $125 million in funding for LOY-002, a beef-flavored daily pill designed to extend canine lifespans by at least one year. The drug works by targeting age-related metabolic changes and insulin regulation, according to Loyal CEO Celine Halioua.

Simultaneously, the Dog Aging Project is studying rapamycin, an immunosuppressant drug, which preliminary research suggests could add three years to dogs' lives. Researchers believe these canine studies could accelerate human longevity research, though experts note the lack of standardized aging biomarkers remains a significant hurdle for human trials.

A new study reveals that the widely accepted "sophomore slump" phenomenon -- where a band's second album is perceived as significantly worse than the first -- exists primarily in professional critics' reviews, not fan ratings. Researchers suggest this bias stems from social conformity among critics, while fans provide more consistent and reliable evaluations across albums. "If every music critic has heard of a sophomore slump and everyone knows it happens, they might be convinced to over-apply it in their reviews," said Gregory Webster, Ph.D., the R. David Thomas Endowed Professor of Psychology at the University of Florida and co-author of the new study. "We suspect it's a kind of social conformity, which we see in a lot of social groups." Phys.Org reports: Webster and his co-author, University of Hannover Professor of Educational Science Lysann Zander, Ph.D., analyzed thousands of albums rated by professional critics and amateur fans. Both critics and fans said that bands' albums generally got worse over time.

But critics were exceptionally harsh with the second album, which was an outlier in this downward trajectory. "It's only critics that show substantial evidence of a sophomore slump bias, whereby they are giving artists' second albums unusually low reviews compared to their first and third albums," Webster said. "Fans show no evidence of a sophomore slump bias."

Webster and Zander expected that fan ratings would reflect a broader consensus about a band's true performance. Fans aren't pressured by the same social norms as professional critics. And with ratings from thousands of fans, the researchers could average across a large group to find more reliable ratings.

NASA's Parker Solar Probe made a historic approach on Christmas Eve, flying within 3.8 million miles of the Sun at a record-breaking speed of 430,000 mph. It marks humanity's closest encounter with a star. Live Science reports: Mission control cannot communicate with the probe during this rendezvous due to its vicinity to the sun, and will only know how the spacecraft fared in the early hours of Dec. 27 after a beacon signal confirms both the flyby's success and the overall state of the spacecraft. Images gathered during the flyby will beam home in early January, followed by scientific data later in the month when the probe swoops further away from the sun, Nour Rawafi, who is the project scientist for the mission, told reporters at the Annual Meeting of the American Geophysical Union (AGU) earlier this month.

Parker launched in 2018 to help decode some of the biggest mysteries about our sun, such as why its outermost layer, the corona, heats up as it moves further from the sun's surface, and what processes accelerate charged particles to near-light speeds. In addition to revolutionizing our understanding about the sun, the probe also caught rare closeups of passing comets and studied the surface of Venus. On Christmas Eve, scientists expect the probe to have flown through plumes of plasma still attached to the sun, and hope it observed solar flares occurring simultaneously due to ramped-up turbulence on the sun's surface, which spark breathtaking auroras on Earth but also disrupt communication systems and other technology. "Right now, Parker Solar Probe has achieved what we designed the mission for," Nicola Fox, the associate administrator for NASA Science Mission Directorate at NASA Headquarters in Washington, D.C., said in a NASA video released on Dec. 24. "It's just a total 'Yay! We did it' moment."

Researchers at the University of Toronto have experimentally observed "negative time" in photon interactions with atoms, suggesting a measurable effect rather than an illusion. The researchers stress that these findings, posted on the preprint server arXiv, don't imply time travel. Phys.Org reports: The experiments, conducted in a cluttered basement laboratory bristling with wires and aluminum-wrapped devices, took over two years to optimize. The lasers used had to be carefully calibrated to avoid distorting the results. [...] The explanation lies in quantum mechanics, where particles like photons behave in fuzzy, probabilistic ways rather than following strict rules.

Instead of adhering to a fixed timeline for absorption and re-emission, these interactions occur across a spectrum of possible durations -- some of which defy everyday intuition. Critically, the researchers say, this doesn't violate Einstein's theory of special relativity, which dictates that nothing can travel faster than light. These photons carried no information, sidestepping any cosmic speed limits. "We've made our choice about what we think is a fruitful way to describe the results," said Aephraim Steinberg, a University of Toronto professor specializing in experimental quantum physics, adding that while practical applications remain elusive, the findings open new avenues for exploring quantum phenomena.

"I'll be honest, I don't currently have a path from what we've been looking at toward applications," he admitted. "We're going to keep thinking about it, but I don't want to get people's hopes up."

Research finds people who have more than four coffees a day have 17% lower chance of head and neck cancers. From a report: If the only thing getting you through a mountain of present-wrapping is a mug of tea or coffee, be of good cheer. Researchers have found people who consume those drinks have a slightly lower risk of head and neck cancers. There are about 12,800 new head and neck cancer cases and about 4,100 related deaths in the UK every year, according to Cancer Research UK.

The new study does not prove that tea and coffee are themselves protective against such cancers, but experts say the findings help to shed light on what has been a much debated area with inconsistent results. "While there has been prior research on coffee and tea consumption and reduced risk of cancer, this study highlighted their varying effects with different sub-sites of head and neck cancer including the observation that even decaffeinated coffee had some positive impact," said Dr Yuan-Chin Amy Lee of Huntsman Cancer Institute and the University of Utah School of Medicine, the senior author of the study.

Writing in the journal Cancer, the team report how they analysed data from 14 studies that covered Europe, North America and Latin America. [...] After taking into account factors such as age, sex, daily number of cigarettes smoked, alcohol consumption and fruit and vegetable consumption, the researchers found that people who drink more than four cups of caffeinated coffee a day have a 17% lower chance of developing head and neck cancers overall compared with those who do not drink the beverage. Specifically they found such consumption was associated with reduced odds of cancers of the oral cavity and the oropharynx -- part of the throat just behind the mouth.

A new study finds that polymer-based commercial tea bags release billions of nanoplastics and microplastics when infused. It also shows for the first time that these particles are capable of being absorbed by human intestinal cells, entering the bloodstream, and potentially affecting human health. The study by the Mutagenesis Group of the UAB Department of Genetics and Microbiology has been published in the journal Chemosphere. Medical Xpress reports: The tea bags used for the research were made from the polymers nylon-6, polypropylene and cellulose. The study shows that, when brewing tea, polypropylene releases approximately 1.2 billion particles per milliliter, with an average size of 136.7 nanometers; cellulose releases about 135 million particles per milliliter, with an average size of 244 nanometers; while nylon-6 releases 8.18 million particles per milliliter, with an average size of 138.4 nanometers. To characterize the different types of particles present in the infusion, a set of advanced analytical techniques such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), infrared spectroscopy (ATR-FTIR), dynamic light scattering (DLS), laser Doppler velocimetry (LDV), and nanoparticle tracking analysis (NTA) were used.

The particles were stained and exposed for the first time to different types of human intestinal cells to assess their interaction and possible cellular internalization. The biological interaction experiments showed that mucus-producing intestinal cells had the highest uptake of micro and nanoplastics, with the particles even entering the cell nucleus that houses the genetic material. The result suggests a key role for intestinal mucus in the uptake of these pollutant particles and underscores the need for further research into the effects that chronic exposure can have on human health.

fjo3 shares a report from the Washington Post: The International Space Station had to fire thrusters from a docked spacecraft last month to avoid a piece of debris that has been circling the globe for the nearly 18 years since the Chinese government blasted apart one of its own satellites in a weapons test. The evasive maneuver was the second in just six days for the space station, which has four NASA astronauts and three Russian cosmonauts aboard. That is the shortest interval ever between such actions, illustrating the slowly worsening problem of space junk in orbit. Debris is an increasingly vexing issue not only for NASA, but also for companies such as SpaceX and OneWeb seeking to protect the thousands of small satellites they send into space to provide high-speed internet. The debris cloud from China's 2007 destruction of the Fengyun 1C satellite remains one of the most persistent threats in orbit, with about 3,500 fragments still posing collision risks to spacecraft. Since 2020, the ISS has performed 15 debris-avoidance maneuvers.

The evasive maneuver was performed after a Space Force warning. According to the report, Space Force now tracks over 47,200 objects in orbit, issuing approximately 23 daily collision warnings -- up from just six per day five years ago.