"Mirror, mirror...is deployed," NASA tweeted Saturday, confirming that the James Webb telescope "has taken on its final form. For the next ~6 months, the space telescope will cool down, calibrate its instruments, and prepare to #UnfoldTheUniverse."

With a diameter of 21.3 feet, the telescope's mirror is the largest mirror ever launched into space — a joint effort with the European Space Agency and Canadian Space Agency. "Good news keep coming," the ESA tweeted yesterday. " Mike Menzel, NASA Webb Mission Systems Engineer said yesterday in press brief that Webb might have 'quite a bit of fuel margin... Roughly speaking, it's around 20 years of propellant', adding that's still to be determined."

Long-time Slashdot reader cusco writes that "For years naysayers have confidently declared that the numerous automated operations necessary to fully deploy the James Webb Space Telescope were going to guarantee its failure. Today they've been proven wrong."

From NASA.gov: "Today, NASA achieved another engineering milestone decades in the making. While the journey is not complete, I join the Webb team in breathing a little easier and imagining the future breakthroughs bound to inspire the world," said NASA Administrator Bill Nelson. "The James Webb Space Telescope is an unprecedented mission that is on the precipice of seeing the light from the first galaxies and discovering the mysteries of our universe. Each feat already achieved and future accomplishment is a testament to the thousands of innovators who poured their life's passion into this mission...."

The world's largest and most complex space science telescope will now begin moving its 18 primary mirror segments to align the telescope optics. The ground team will command 126 actuators on the backsides of the segments to flex each mirror — an alignment that will take months to complete. Then the team will calibrate the science instruments prior to delivering Webb's first images this summer.

"I am so proud of the team — spanning continents and decades — that delivered this first-of-its kind achievement," said Thomas Zurbuchen, associate administrator for the Science Mission Directorate in NASA Headquarters in Washington. "Webb's successful deployment exemplifies the best of what NASA has to offer: the willingness to attempt bold and challenging things in the name of discoveries still unknown."

Soon, Webb will also undergo a third mid-course correction burn — one of three planned to place the telescope precisely in orbit around the second Lagrange point, commonly known as L2, nearly 1 million miles from Earth. This is Webb's final orbital position, where its sunshield will protect it from light from the Sun, Earth, and Moon that could interfere with observations of infrared light. Webb is designed to peer back over 13.5 billion years to capture infrared light from celestial objects, with much higher resolution than ever before, and to study our own solar system as well as distant worlds.

"The successful completion of all of the Webb Space Telescope's deployments is historic," said Gregory L. Robinson, Webb program director at NASA Headquarters. "This is the first time a NASA-led mission has ever attempted to complete a complex sequence to unfold an observatory in space — a remarkable feat for our team, NASA, and the world."
Saturday the Canadian Space Agency tweeted "Wow.... Congratulations to everyone involved. We can't wait to see what the telescope has in store for the international astronomy community!"

Slashdot reader eastlight_jim writes: Scientists from the University of Oxford have today published a study in Clinical Cancer Research which shows that they can use a technique called NMR (nuclear magnetic resonance) metabolomics analysis to identify patients with cancer. Specifically, they identify patients with cancer from within a population of generally unwell patients with non-specific symptoms like fatigue and weigh-loss — a traditionally hard-to-diagnose cohort.

The technique works because the NMR identifies small molecules called metabolites in the blood of patients and this information can then be used by machine learning to recognise patterns of metabolites specific to cancer, as well as identifying patients whose cancer has already spread.
The Guardian reports: If validated, the test could enable cancer patients to be identified earlier, when they are more likely to respond to treatment, and help flag up who could benefit from early access to drugs designed to tackle metastatic cancer.

The test can also tell if the disease has spread.

There is currently no clear route through which someone with nonspecific symptoms that could be cancer is referred for further investigation.... "The problem we've had in the past is that if they do have cancer, that cancer is growing all the time, and when they come back the cancers are often quite advanced," said Dr James Larkin, of the University of Oxford, who was involved in the research. Although it is difficult to know precisely how many individuals fall into this category, "it is likely to be tens of thousands of patients across the UK," Larkin said.

Slashdot reader BoogieChile writes: Details of an important new fossil site has just been published in the first Science Advances journal for the new year. McGraths Flat, in New South Wales, Australia, was once the location of this oxbow lake in a mesic rainforest. Today, superb examples of fossilised animals and plants from the Miocene epoch have been recovered, showing incredible detail, including melanosomes preserved in feathers of birds and the eyes of fossilised fish

"The discovery of melanosomes — subcellular organelles that store the melanin pigment — allows us to reconstruct the colour pattern of birds and fishes that once lived at McGraths Flat," said Dr Michael Frese of the University of Canberra, one of the team's leaders. "Interestingly, the colour itself is not preserved, but by comparing the size, shape and stacking pattern of the melanosomes in our fossils with melanosomes in extant specimens, we can often reconstruct colour and/or colour patterns.
"Over the last three years a team of researchers has been secretly excavating the site, discovering thousands of specimens including rainforest plants, insects, spiders, fish and a bird feather," announced the University of New South Wales: "The fossils we have found prove that the area was once a temperate, mesic rainforest and that life was rich and abundant here in the Central Tablelands," said UNSW Sydney palaeontologist Dr Matthew McCurry [one of the team's leaders]. "Many of the fossils that we are finding are new to science and include trapdoor spiders, giant cicadas, wasps and a variety of fish.

"Until now it has been difficult to tell what these ancient ecosystems were like, but the level of preservation at this new fossil site means that even small fragile organisms like insects turned into well-preserved fossils."

Associate Professor Michael Frese, who imaged the fossils using stacking microphotography and a scanning electron microscope, said that the fossils from McGraths Flat show an incredibly detailed preservation. "Using electron microscopy, I can image individual cells of plants and animals and sometimes even very small subcellular structures," Dr Frese said. "The fossils also preserve evidence of interactions between species. For instance, we have fish stomach contents preserved in the fish, meaning that we can figure out what they were eating. We have also found examples of pollen preserved on the bodies of insects so we can tell which species were pollinating which plants."

Slashdot reader DevNull127 writes: Google marked what would've been Stephen Hawking's 80th birthday with a very special Doodle — an animated video in which the voice of Stephen Hawking speaks again, generated and used with the approval of the Hawking estate.

"My expectations were reduced to zero at 21. Everything since then has been a bonus," Hawking says in the video. "Although I cannot move and I have to speak through a computer, in my mind I am free. I have spent my life travelling across the universe, inside my mind."

In the video tribute, Stephen Hawking passes near a black hole on a model timeline of the universe. "We are very very small," he says. "But we are profoundly capable of very very big things.

"There should be no boundaries to human endeavor. However bad life may seem. While there is life, there is hope. Be brave, be curious, be determined, overcome the odds. It can be done."
"From colliding black holes to the Big Bang, his theories on the origins and mechanics of the universe revolutionized modern physics," explains the Google Doodles page, "while his best-selling books made the field widely accessible to millions of readers worldwide."

And Google's Arts and Culture blog shares a longer look at Stephen Hawking's life, including a 1979 photo of young Hawking at the Department of Applied Mathematics and Theoretical Physics at Cambridge University. "Because of Stephen Hawking's work, the radiation emitted by black holes is now called Hawking Radiation," the biography says at one point, also remembering Hawking's best-selling book A Brief History of Time: From the Big Bang to Black Holes.

But they also share some more personal memories: In 1990, with lifelong friend, the physicist Kip Thorne, Stephen approached the controversial notion of whether time travel is allowed by the laws of physics. To explore this hypothesis Stephen planned a party for time travellers. He wrote invitations, set a date, time and venue and provided precise GPS coordinates.

Stephen did not send out the invitations until after the party date was over. That way, only those who could genuinely travel back in time would know of it and be able to attend.

On the due day Stephen sat politely and waited. But no-one came. And that was the point. "I have experimental evidence that time travel is not possible", he said afterwards. And the champagne went back on ice....
The biography closes with this quote from Stephen Hawking. "Remember to look up at the stars, and not down at your feet. Try to make sense of what you see and wonder about what makes the universe.

"Be curious, and however difficult life may seem there is always something you can do and succeed at; it matters that you don't just give up."

Right now, NASA is providing live coverage for the conclusion of the James Webb Space Telescope's major spacecraft deployments. NASA offered this description of the event earlier this week: Beginning no earlier than 9 a.m. EST, NASA will air live coverage of the final hours of Webb's major deployments. After the live broadcast concludes, at approximately 1:30 p.m. [EST], NASA will hold a media briefing. Both the broadcast and media briefing will air live on NASA TV, the NASA app, and the agency's website.

As the final step in the observatory's major deployments, the Webb team plans to unfold the second of two primary mirror wings. When this step is complete, Webb will have finished its unprecedented process of unfolding in space to prepare for science operations....
SlashGear reports: Consisting of 18 hexagonal, gold-plated segments, the mirror is one of the telescope's most visually striking components. The primary mirror needs to be large as this is directly related to how much light the telescope can detect, which makes it more accurate (via NASA). James Webb's mirror is 6.5 meters (21ft) across, which is the largest ever launched into space. Compared to the 2.4-meter (7.8ft) mirror used on James Webb's predecessor, the Hubble Space Telescope, this big mirror will help the telescope to see out further into space.

Engineers couldn't just build a 6.5-meter (21ft) mirror like Hubble's, though, because it would be too large and too heavy to launch. Instead, they built the James Webb mirror in segments made from beryllium, which is both lightweight and strong. These segments fold in on themselves to fit into the rocket, and now it is time for them to unfold into their final configuration.
"Once fully operational, Webb will explore every phase of cosmic history," NASA announced, "from within the solar system to the most distant observable galaxies in the early universe, and everything in between. Webb will reveal new and unexpected discoveries and help humanity understand the origins of the universe and our place in it."

SlashGear adds that "Having left Earth's atmosphere and traveled over 250,000 miles away from our planet, it is now more than 70% of its way to its final orbit around the sun..."

A federal judge in Texas on Thursday ordered the Food and Drug Administration to make public the data it relied on to license Pfizer's COVID-19 vaccine, imposing a dramatically accelerated schedule that should result in the release of all information within about eight months. Reuters reports: That's roughly 75 years and four months faster than the FDA said it could take to complete a Freedom of Information Act request by a group of doctors and scientists seeking an estimated 450,000 pages of material about the vaccine. The court "concludes that this FOIA request is of paramount public importance," wrote U.S. District Judge Mark Pittman in Fort Worth, who was appointed to the bench by former President Donald Trump in 2019.

The FDA didn't dispute it had an obligation to make the information public but argued that its short-staffed FOIA office only had the bandwidth to review and release 500 pages a month. While Pittman recognized "the 'unduly burdensome' challenges that this FOIA request may present to the FDA," in his four-page order, he resoundingly rejected the agency's suggested schedule. Rather than producing 500 pages a month -- the FDA's proposed timeline -- he ordered the agency to turn over 55,000 a month. That means all the Pfizer vaccine data should be public by the end of the summer rather than, say, the year 2097. "Even if the FDA may not see it this way, I think Pittman did the agency -- and the country -- a big favor by expediting the document production," writes Reuters' Jenna Greene. "Making the information public as soon as possible may help assuage the concerns of vaccine skeptics and convince them the product is safe."

"Still, the FDA is likely to be hard-pressed to process 55,000 pages a month," Greene adds. "The office that reviews FOIA requests has just 10 employees, according to a declaration filed with the court by Suzann Burk, who heads the FDA's Division of Disclosure and Oversight Management. Burk said it takes eight minutes a page for a worker 'to perform a careful line-by-line, word-by-word review of all responsive records before producing them in response to a FOIA request.' [...] But as lawyers for the plaintiffs Public Health and Medical Professionals for Transparency pointed out in court papers (PDF), the FDA as of 2020 had 18,062 employees. Surely some can be dispatched to pitch in at the FOIA office."

An anonymous reader quotes a report from The New York Times: Shortly after coronavirus vaccines were rolled out about a year ago, women started reporting erratic menstrual cycles after receiving the shots. Some said their periods were late. Others reported heavier bleeding than usual or painful bleeding. Some postmenopausal women who hadn't had a period in years even said they had menstruated again. A study published on Thursday found that women's menstrual cycles did indeed change following vaccination against the coronavirus (Warning: source may be paywalled; alternative source). The authors reported that women who were inoculated had slightly longer menstrual cycles after receiving the vaccine than those who were not vaccinated.

Their periods themselves, which came almost a day later on average, were not prolonged, however, and the effect was transient, with cycle lengths bouncing back to normal within one or two months. For example, someone with a 28-day menstrual cycle that starts with seven days of bleeding would still begin with a seven-day period, but the cycle would last 29 days. The cycle ends when the next period starts and would revert to 28 days within a month or two. The delay was more pronounced in women who received both vaccine doses during the same menstrual cycle. These women had their periods two days later than usual, the researchers found. [...] One serious drawback of the study, which focused on U.S. residents, is that the sample is not nationally representative and cannot be generalized to the population at large. The data were provided by a company called Natural Cycles that makes an app to track fertility. Its users are more likely to be white and college educated than the U.S. population overall; they are also thinner than the average American woman -- weight can affect menstruation -- and do not use hormonal contraception. "I want to make sure we dissuade people from those untrue myths out there about fertility effects," said Dr. Hugh Taylor, the chair of the department of obstetrics, gynecology and reproductive sciences at Yale School of Medicine. "A cycle or two where periods are thrown off may be annoying, but it's not going to be harmful in a medical way."

With that said, postmenopausal women who experience vaginal bleeding or spotting, whether after vaccination or not, should be evaluated by a physician, says Dr. Taylor. It may be a sign they have a serious medical condition.

As snowstorms sweep the East Coast of the United States this week, transportation officials have deployed a go-to solution for keeping winter roads clear: salt. From a report: But while pouring tons of salt on roads makes winter driving safer, it also has damaging environmental and health consequences, according to a growing body of research. As snow and ice melt on roads, the salt washes into soil, lakes and streams, in some cases contaminating drinking water reservoirs and wells. It has killed or endangered wildlife in freshwater ecosystems, with high chloride levels toxic to fish, bugs and amphibians, according to the Environmental Protection Agency. "It's an issue that requires attention now," said Bill Hintz, an assistant professor in the environmental sciences department at the University of Toledo and the lead author of a recent research review published in the journal Frontiers in Ecology and the Environment.

"There's plenty of scientific evidence to suggest that freshwater ecosystems are being contaminated by salt from the use of things like road salt beyond the concentration which is safe for freshwater organisms and for human consumption," Dr. Hintz said. Salt has been used to de-ice roads in the United States since the 1930s, and its use across the country has tripled in the past 50 years, Dr. Hintz said. More than 20 million metric tons of salt are poured on U.S. roads each winter, according to an estimate by the Cary Institute of Ecosystem Studies in New York, and the environmental costs are growing. Still, little has been done to address the environmental impact of road salt because it is cheap and effective, said Victoria Kelly, the environmental programming manager at the Cary Institute. By lowering the freezing temperature of water, salt prevents snow from turning to ice and melts ice that is already there.

New submitter nuckfuts writes: Canada's Minister of Health is signalling that provinces may make vaccines mandatory in the coming months as the only way to deal with surging COVID-19 caseloads. It will be up to individual provinces to decide. Alberta's Premier Jason Kenny as already stated that Alberta will not make vaccines mandatory. Some European countries, such as Austria and Greece, have moved in that direction already as infection rates hit record highs and vaccination campaigns stall. Greeks over the age of 60 who are not yet vaccinated are now subject to monthly fines of 100 euros ($140 Cdn). Austria, which has one of the lowest vaccination rates in the European Union, is looking at fining unvaccinated Austrians more than 7,000 euros ($9,880). Slovakia, meanwhile, is offering payments of 600 euros ($844) to encourage people to get their shots.

An anonymous reader shares a report: Weighing 80-100kg and sporting long straight horns, white spots on its face and large facial scent glands, the saola does not sound like an animal that would be hard to spot. But it was not until 1992 that this elusive creature was discovered, becoming the first large mammal new to science in more than 50 years. Nicknamed the "Asian unicorn," the saola continues to be elusive. They have never been seen by a biologist in the wild and have been camera-trapped only a handful of times. There are reports of villagers trying to keep them in captivity but they have died after a few weeks, probably due to the wrong diet. It was during a survey of wildlife in the remote Vu Quang nature reserve, a 212 square mile forested area of north central Vietnam, in 1992, that biologist Do Tuoc came across two skulls and a pair of trophy horns belonging to an unknown animal.

Twenty more specimens, including a complete skin, were subsequently collected and, in 1993, laboratory tests revealed the animal to be not only a new species, but an entirely new genus in the bovid family, which includes cattle, sheep, goats and antelopes. Initially named Vu Quang Ox, the animal was later called saola (Pseudoryx nghetinhensis) -- meaning "spindle horns," the arms or posts (sao) of a spinning wheel (la) according to Lao-speaking ethnic groups in Laos and neighbouring Vietnam. The discovery was hailed as one of the most spectacular zoological discoveries of the 20th century but less than 30 years later the saola population is believed to have declined massively due to commercial wildlife poaching, which has exploded in Vietnam since 1994. Even though the saola is not directly targeted by poachers, intensive commercial snaring that supplies animals for use in traditional Asian medicine or as bushmeat serves as the primary threat.

Researchers at Carnegie Mellon University developed a mathematical model to understand why popular baby names keep on changing, and it "points to a tug-of-war between the need to stand out in the crowd and the need to fit in with the pack," reports Phys.Org. "The motives to conform and to be unique interact to produce complex dynamics when people observe each other in a social network." The research has been published in the journal Psychological Review. From the report: Mathematically speaking, the desire to fit in would drive behavior toward the mean, or average, in the group while the desire to stand out would drive behavior away from the mode, or most common occurrence, in the group. "Put them together and they still lead to equilibrium," [said Russell Golman, associate professor in the Social and Decision Sciences Department at CMU]. To break out of the equilibrium conundrum, Golman and his team added social networks to the mix. According to Golman, that means communities, neighbors, colleagues, clubs, or other social groups, not necessarily social media. "It was surprising that social networks could make such a big difference," said Golman. "We modeled the dynamics with a lot of different networks, and not converging to equilibrium is actually pretty typical."

To test their new model, CMU Ph.D. student Erin Bugbee turned to the large database of baby names managed by the Social Security Administration for the last century. If baby names settled into an equilibrium, the most popular name would always be the most popular. That is not what happened.

As the popularity of one name, say Emily, peaks, parents may decide to forgo that name and pick a similar one, like Emma. By following this strategy, they are instilling in their new daughter a name that is socially acceptable by its similarity to the popular name but will allow her to stand out in the crowd by putting a unique twist on her identity. Many parents may be thinking the same thing and the number of little girls named Emily will decline while those named Emma will increase. The study concludes that understanding social psychology and social network structure are both critical to explain the emergence of complex, unpredictable cultural trends.

"For the first time, astronomers were able to observe the death throes of a red supergiant star in real time," writes Slashdot reader quonset from a report via CNN. "The fortuitous event came about when astronomers were first alerted in the summer of 2020 by a release of bright radiation detected by the University of Hawaii Institute for Astronomy Pan-STARRS telescope on Maui's Haleakal. Then, In the fall, astronomers witnessed a supernova form in the same spot." From the report: Before they go out in a blaze of glory, some stars experience violent eruptions or release glowing hot layers of gas. Until astronomers witnessed this event, they believed that red supergiants were relatively quiet before exploding into a supernova or collapsing into a dense neutron star. Instead, scientists watched the star self-destruct in dramatic fashion before collapsing in a type II supernova. This star death is the rapid collapse and violent explosion of a massive star after it has burned through the hydrogen, helium and other elements in its core. All that remains is the star's iron, but iron can't fuse so the star will run out of energy. When that happens, the iron collapses and causes the supernova. A study detailing these findings published Thursday in The Astrophysical Journal.

"It's like watching a ticking time bomb," said senior study author Raffaella Margutti, an associate professor of astronomy and astrophysics at UC Berkeley, in a statement. "We've never confirmed such violent activity in a dying red supergiant star where we see it produce such a luminous emission, then collapse and combust, until now." Some of these massive stars likely experience consequential internal changes that cause the tumultuous release of gas before they die, the finding has shown.

sciencehabit shares a report from Science.org: It takes a lot of science to stop a fire. To prevent homes and workplaces from going up in smoke, manufacturers have added flame retardants to plastic, wood, and steel building materials for decades. But such additives can be toxic, expensive, and sometimes ineffective. Now, researchers in Australia and China have come up with a new flame retardant that, when exposed to extreme heat, forms a ceramic layer akin to hardened lava, squelching the flames before they spread. "This is very good work," says David Schiraldi, a chemist at Case Western Reserve University, who has developed other flame retardants. He notes that the ceramic's starting materials aren't particularly expensive or toxic, making it more likely to see widespread use. "[This] could impact public safety in the long run."

[The researchers] used three components. First, they created a mixture of several metal oxide powders -- including oxides of aluminum, silicon, calcium, and sodium. That mix begins to melt at about 350C (below the temperature of most flames), forming a glasslike sheet. Next, the researchers added tiny flakes of boron nitride, which flow easily and help fill any spaces between the metal oxides as the glass forms. Finally, they added a fire-retardant polymer, which they described in ACS Nano in 2021. The polymer acts as a binder to glue the rest of the mixture to whatever it's coating. That mix dissolved in water into a milky-white solution, which they then sprayed on a variety of surfaces, including rigid foam insulation, wood, and steel. After it dried, they blasted each coated material for 30 seconds with an 1100C butane torch. In each case, the coating melted into a viscous liquid, covering the material in a continuous glassy sheet.

When heated by the torch, coating spewed out nonflammable gases, such as carbon dioxide. As it did, it became more dense and formed a uniform, noncombustible char layer, which blocked flames from spreading to the materials underneath. The novel flame retardant protected rigid polymer foam -- the kind used to insulate homes -- better than more than a dozen commonly used retardants, the researchers report today in Matter. The new coating also excelled at protecting wood and steel. If sprayed on building materials during construction, the new coating could prevent disasters like the 2017 Grenfell Tower fire in London, where 72 people died, the researchers say.

The European Space Agency will soon send JUICE, or the JUpiter ICy moons Explorer on a mission to scout out Jupiter and three of its 79 moons: Europa, Callisto, and Ganymede. From a report: Scheduled to launch in April 2023, JUICE will blast off from an Ariane 5 rocket before embarking on a 7.6-year journey to reach the gas giant. Broken up by multiple gravitational assists -- or pushes that help adjust a spacecraft's speed and trajectory -- from Venus and Earth, the explorer will carry some of the most powerful remote sensing and geophysical instruments ever flown to the outer solar system.

Last month, a 1:18 scale model of JUICE was employed at the ESA's testing center in the Netherlands to try out one of the instruments, RIME, also known as the Radar For Icy Moons Exploration. RIME will use ice-penetrating radar and a 52-foot-long antennae to map the subsurface structure of these moons, up to about 5.6 miles down. To test, the model was placed in a chamber lined with metal walls that blocked incoming radio signals and black, spiky foam coating that absorbed internal radio signals, or outgoing transmissions. This dichotomy helped the JUICE team simulate both the vast emptiness of space and the challenges the craft could run into during the mission.

The number of new COVID cases more than tripled over the past two weeks, shattering records all across the U.S. From a report: The Omicron variant appears to be significantly milder than its predecessors, and it's not leading to as much serious illness. But sky-high case counts are still a warning sign, especially in areas whose health care systems are already stretched thin. The U.S. is now averaging nearly 550,000 new cases per day -- a 225% increase over the past two weeks, and by far the highest levels of the entire pandemic. That's likely an undercount, as many people are testing themselves at home. In previous waves, a sharp increase in cases would translate into a similar increase in hospitalizations, and then deaths. Omicron, however, appears to cause severe illness at a much lower rate.

An anonymous reader quotes a report from Science.org: Astronomers have long thought it takes millions of years for the seeds of stars like the Sun to come together. Clouds of mostly hydrogen gas coalesce under gravity into prestellar cores dense enough to collapse and spark nuclear fusion, while magnetic forces hold matter in place and slow down the process. But observations using the world's largest radio telescope are casting doubt on this long gestational period. Researchers have zoomed in on a prestellar core in a giant gas cloud -- a nursery for hundreds of baby stars -- and found the tiny embryo may be forming 10 times faster than thought, thanks to weak magnetic fields. "If this is proven to be the case in other gas clouds, it will be revolutionary for the star formation community," says Paola Caselli from the Max Planck Institute for Extraterrestrial Physics, who was not involved with the research.

Studying star birth and the tug of war between gravity and magnetic forces has been a challenge because the magnetic fields can be 100,000 times weaker than Earth's. The only direct way to detect them comes from a phenomenon called the Zeeman effect, in which the magnetic fields cause so-called spectral lines to split in a way that depends on the strength of the field. These spectral lines are bright or dark patterns where atoms or molecules emit or absorb specific wavelengths of light. For gas clouds, the Zeeman splitting occurs in radio wavelengths, so radio telescopes are needed. And the dishes must be big in order to zoom in on a small region of space and reveal such a subtle effect. Previously, researchers had used Puerto Rico's Arecibo radio telescope -- which collapsed in 2020 -- to study Lynds 1544, a relatively isolated stellar embryo within the Taurus Molecular Cloud, just 450 light-years away from Earth. They measured the magnetic fields in the wispy layers of gas far out from the core, where magnetic forces dominated over gravity. They also analyzed the stronger fields inside the core, where gravity nevertheless dominated because the core is 10,000 times denser than the outer layer, says Richard Crutcher, a radio astronomer at the University of Illinois, Urbana-Champaign. What was missing was an examination of the intermediate region between the core and the outer layer. That has now come into focus with a new tracer of the Zeeman effect -- a particular hydrogen absorption line -- detected by the Five-hundred-meter Aperture Spherical radio Telescope (FAST), a giant dish built inside a natural basin in southwestern China.

In a study published today in Nature, researchers report a magnetic field strength of 4 microgauss -- no stronger than in the outer layer. "If the standard theory worked, the magnetic field needs to be much stronger to resist a 100-fold increase in cloud density. That didn't happen," says Di Li, the chief scientist of FAST who led the study. "The paper basically says that gravity wins in the cloud: That's where stars start to form, not in the dense core," Caselli adds. "That's a very big statement." The finding implies that a gas cloud could evolve into a stellar embryo 10 times quicker than previously thought, says lead author Tao-Chung Ching of the Chinese Academy of Sciences's National Astronomical Observatories. Li says he wants to study other molecular clouds to see whether the lessons from Lynds 1544 apply more generally.

New submitter GFS666 shares a report from Live Science: We may soon be able to test one of Stephen Hawking's most controversial theories, new research suggests. In the 1970s, Hawking proposed that dark matter, the invisible substance that makes up most matter in the cosmos, may be made of black holes formed in the earliest moments of the Big Bang. Now, three astronomers have developed a theory that explains not only the existence of dark matter, but also the appearance of the largest black holes in the universe. "What I find personally super exciting about this idea is how it elegantly unifies the two really challenging problems that I work on -- that of probing the nature of dark matter and the formation and growth of black holes -- and resolves them in one fell swoop," study co-author Priyamvada Natarajan, an astrophysicist at Yale University, said in a statement. What's more, several new instruments -- including the James Webb Space Telescope that just launched -- could produce data needed to finally assess Hawking's famous notion.

In the latest research, Natarajan, Nico Cappelluti at the University of Miami and Gunther Hasinger at the European Space Agency took a deep dive into the theory of primordial black holes, exploring how they might explain the dark matter and possibly resolve other cosmological challenges. To pass current observational tests, primordial black holes have to be within a certain mass range. In the new work, the researchers assumed that the primordial black holes had a mass of around 1.4 times the mass of the sun. They constructed a model of the universe that replaced all the dark matter with these fairly light black holes, and then they looked for observational clues that could validate (or rule out) the model.

The team found that primordial black holes could play a major role in the universe by seeding the first stars, the first galaxies and the first supermassive black holes (SMBHs). Observations indicate that stars, galaxies and SMBHs appear very quickly in cosmological history, perhaps too quickly to be accounted for by the processes of formation and growth that we observe in the present-day universe. "Primordial black holes, if they do exist, could well be the seeds from which all supermassive black holes form, including the one at the center of the Milky Way," Natarajan said. And the theory is simple and doesn't require a zoo of new particles to explain dark matter. "Our study shows that without introducing new particles or new physics, we can solve mysteries of modern cosmology from the nature of dark matter itself to the origin of supermassive black holes," Cappelluti said in the statement. The model could be tested relatively soon, the report says. "The James Webb Space Telescope, which launched Christmas Day after years of delays, is specifically designed to answer questions about the origins of stars and galaxies. And the next generation of gravitational wave detectors, especially the Laser Interferometer Space Antenna (LISA), is poised to reveal much more about black holes, including primordial ones if they exist."

An anonymous reader quotes a report from Bloomberg: China's Covid-19 health code system that strictly governs people's movements crashed in Xi'an this week, worsening conditions in the locked-down city where the country's worst outbreak since Wuhan has been unfolding. The crash has complicated efforts to weed out cases through mass testing, created hurdles for people seeking care at hospitals and led to the suspension of a top official, the latest among a slew of bureaucrats to be punished as Beijing fumes over the situation.

Liu Jun, head of Xi'an's big-data bureau, was temporarily dismissed over performance failures, the municipal Communist Party Committee said in a statement. While the committee didn't explicitly lay out the reason behind its decision, it came after Xi'an's health code system -- which is under Liu's purview and tracks individuals' movements and vaccination status -- broke down on Tuesday. The system crash meant that locals were unable to access their Covid infection status after Xi'an embarked on a new widespread round of nucleic acid tests, according to a media report. The provincial government said in a statement later that the system was temporarily paralyzed due to overwhelming traffic, and being fixed. It had also experienced technical issues in December. A pregnant women in Xi'an reportedly lost her baby after being refused entry to a hospital because she "couldn't show she was infection-free via the health code app," reports Bloomberg.

"A video posted Tuesday showing what appeared to be a woman bleeding on the sidewalk outside a hospital in Xi'an's Gaoxin district was trending on Weibo. Similar complaints and criticisms were seen elsewhere on Chinese social media as patients failed to get timely treatment at hospitals already overwhelmed by the virus."

InfiniteZero shares a report from Live Science: China's Tianwen-1 spacecraft at Mars pulled a big New Year's surprise with stunning new images captured by a small camera that flew free of the orbiter to snap epic selfies above the Red Planet. The new images published by the China National Space Administration show Tianwen-1 above Mars' north pole, with its solar arrays and antennas on display, as well as a partial closeup of the orbiter and a view of the Red Planet's northern ice cap. The views give an unprecedented view of a spacecraft in orbit around another planet, showing the golden body of Tianwen-1, the silver high-gain antenna for communications, solar arrays and science antennae. A closeup shows the spacecraft's radar antenna parallel to the solar array.

New research from the Institute of Psychiatry, Psychology, & Neuroscience (IoPPN) at King's College London, in partnership with COMPASS Pathways, has established that psilocybin can be safely administered at doses of either 10mg or 25mg to up to six participants simultaneously. King's College London reports: The research, published in The Journal of Psychopharmacology, is an essential first step in demonstrating the safety and feasibility of psilocybin -- a psychedelic drug isolated from the Psilocybe mushroom -- for use within controlled settings alongside talking therapy as a potential treatment for a range of mental health conditions, including treatment-resistant depression (TRD) and PTSD. Current treatment options for these conditions are ineffective or partially effective for many people, resulting in a significant unmet need. Early research has indicated a potential for psilocybin therapy to treat these groups, but no trials have been undertaken at the scale needed for regulatory approval to make the therapy available.

The trial is the first of its kind to thoroughly investigate the simultaneous administration of psilocybin. 89 healthy participants with no recent (within 1 year) use of psilocybin were recruited. 60 individuals were randomly picked to receive either a 10mg or 25mg dose of psilocybin in a controlled environment. In addition, all participants were provided with one-to-one support from trained psychotherapists. The remaining 29 participants acted as the control group and received a placebo, also with psychological support. Participants were closely monitored for six to eight hours following administration of psilocybin and then followed up for 12 weeks. During this time, they were assessed for a number of possible changes, including sustained attention, memory, and planning, as well as their ability to process emotions. Throughout the study, there were no instances of anyone withdrawing from the study due to an adverse event, and no consistent trends to suggest that either of the psilocybin doses had any short- or long-term detrimental effects on participants.