nickwinlund77 quotes Live Science: Scientists have measured the shortest unit of time ever: the time it takes a light particle to cross a hydrogen molecule. That time, for the record, is 247 zeptoseconds. A zeptosecond is a trillionth of a billionth of a second, or a decimal point followed by 20 zeroes and a 1. Previously, researchers had dipped into the realm of zeptoseconds; in 2016, researchers reporting in the journal Nature Physics used lasers to measure time in increments down to 850 zeptoseconds. This accuracy is a huge leap from the 1999 Nobel Prize-winning work that first measured time in femtoseconds, which are millionths of a billionths of seconds. It takes femtoseconds for chemical bonds to break and form, but it takes zeptoseconds for light to travel across a single hydrogen molecule (H2). To measure this very short trip, physicist Reinhard Dörner of Goethe University in Germany and his colleagues shot X-rays from the PETRA III at Deutsches Elektronen-Synchrotron (DESY), a particle accelerator in Hamburg. The researchers set the energy of the X-rays so that a single photon, or particle of light, knocked the two electrons out of the hydrogen molecule. (A hydrogen molecule consists of two protons and two electrons.) The photon bounced one electron out of the molecule, and then the other, a bit like a pebble skipping over the top of a pond. These interactions created a wave pattern called an interference pattern, which Dörner and his colleagues could measure with a tool called a Cold Target Recoil Ion Momentum Spectroscopy (COLTRIMS) reaction microscope.

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Apparently Twinkies aren't immortal. After discovering that his 8-year-old Twinkies "tasted like old sock," biologist Colin Purrington sent them to a pair of scientists -- Brian Lovett and Matt Kasson from West Virginia University in Morgantown -- to study the kind of fungus growing on them. An anonymous reader shares the report from NPR: The researchers immediately thought some kind of fungus was involved in attacking the 8-year-old Twinkies, because they've studied fungi that kill insects and dry them out in a similar way. Plus, the reddish blotch on one Twinkie seemed to have a growth pattern that's typical of fungi. [...] They noticed that the wrapping on the mummified Twinkie seemed to be sucked inward, suggesting that the fungus got in before the package was sealed and, while the fungus was consuming the Twinkie, it was using up more air or oxygen than it was putting out. "You end up with a vacuum," Lovett says. "And very well that vacuum may have halted the fungus's ability to continue to grow. We just have the snapshot of what we were sent, but who knows if this process occurred five years ago and he just only noticed it now." A quick examination with a magnifying scope revealed fungal sporulation on both the marred and mummified Twinkies, again suggesting the involvement of fungi. The researchers used a bone marrow biopsy tool to sort of drill through the tough outer layer of the gray, mummified Twinkie. "We certainly hit the marrow of the Twinkie and quickly realized that there was still some cream filling on the inside," Kasson says. From the Twinkie marked with just a dark circle of mold, they were able to grow up a species of Cladosporium. "Cladosporium is one of the most common, airborne, indoor molds worldwide," says Kasson, who cautions that they haven't done a DNA analysis to confirm the species. So far, however, no fungi have grown from the sample taken out of the mummified Twinkie. "It may be that we don't have any living spores despite this wonderful, rare event that we've witnessed," Lovett says. "Spores certainly die, and depending on the fungus, they can die very quickly." They're not giving up, though. They'll fill lab dishes with all kinds of sweet concoctions to try to coax something back to life from the mysterious Twinkie mummy.

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schwit1 shares a report from Phys.Org: A team of physicists led by Professor Patrick Windpassinger at Johannes Gutenberg University Mainz (JGU) has successfully transported light stored in a quantum memory over a distance of 1.2 millimeters. They have demonstrated that the controlled transport process and its dynamics has only little impact on the properties of the stored light. The researchers used ultra-cold rubidium-87 atoms as a storage medium for the light as to achieve a high level of storage efficiency and a long lifetime. The controlled manipulation and storage of quantum information as well as the ability to retrieve it are essential prerequisites for achieving advances in quantum communication and for performing corresponding computer operations in the quantum world. Optical quantum memories, which allow for the storage and on-demand retrieval of quantum information carried by light, are essential for scalable quantum communication networks. In their recent publication, Professor Patrick Windpassinger and his colleagues have described the actively controlled transport of such stored light over distances larger than the size of the storage medium. Some time ago, they developed a technique that allows ensembles of cold atoms to be transported on an 'optical conveyor belt' which is produced by two laser beams. The advantage of this method is that a relatively large number of atoms can be transported and positioned with a high degree of accuracy without significant loss of atoms and without the atoms being unintentionally heated. The physicists have now succeeded in using this method to transport atomic clouds that serve as a light memory. The stored information can then be retrieved elsewhere. Refining this concept, the development of novel quantum devices, such as a racetrack memory for light with separate reading and writing sections, could be possible in the future. The findings have been published in the journal Physical Review Letters.

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Joe2020 shares a report from Science News: Now, scientists have found the first superconductor that operates at room temperature -- at least given a fairly chilly room. The material is superconducting below temperatures of about 15 degrees Celsius (59 degrees Fahrenheit), physicist Ranga Dias of the University of Rochester in New York and colleagues report October 14 in Nature. The team's results "are nothing short of beautiful," says materials chemist Russell Hemley of the University of Illinois at Chicago, who was not involved with the research. However, the new material's superconducting superpowers appear only at extremely high pressures, limiting its practical usefulness. Dias and colleagues formed the superconductor by squeezing carbon, hydrogen and sulfur between the tips of two diamonds and hitting the material with laser light to induce chemical reactions. At a pressure about 2.6 million times that of Earth's atmosphere, and temperatures below about 15 degrees C, the electrical resistance vanished. That alone wasn't enough to convince Dias. "I didn't believe it the first time," he says. So the team studied additional samples of the material and investigated its magnetic properties. Superconductors and magnetic fields are known to clash -- strong magnetic fields inhibit superconductivity. Sure enough, when the material was placed in a magnetic field, lower temperatures were needed to make it superconducting. The team also applied an oscillating magnetic field to the material, and showed that, when the material became a superconductor, it expelled that magnetic field from its interior, another sign of superconductivity. The scientists were not able to determine the exact composition of the material or how its atoms are arranged, making it difficult to explain how it can be superconducting at such relatively high temperatures. Future work will focus on describing the material more completely, Dias says.

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An anonymous reader quotes a report from The Guardian: Working with her Stanford colleague, Michal Kosinski, [Pin Pin Tea-makorn, ]a PhD student at Stanford] scoured Google, newspaper anniversary notices and genealogy websites for photos of couples taken at the start of their marriages and many years later. From these they compiled a database of pictures from 517 couples, taken within two years of tying the knot and between 20 and 69 years later. To test whether couples' faces grew alike over time, the researchers showed volunteers a photo of a "target" person accompanied by six other faces, one being their spouse, with the other five faces selected at random. The volunteers were then asked to rank how similar each of the six faces were to the target individual. The same task was then performed by cutting-edge facial recognition software. In the original study in 1987, the late psychologist Robert Zajonc, at the University of Michigan, had volunteers rank the photos of only a dozen couples. He concluded that couples' faces became more alike as their marriages went on, with the effect being greater the happier they were. The explanation, psychologists have argued, is that sharing lives shapes people's faces, with diet, lifestyle, time outdoors, and laughter lines all having a part to play. However, writing in Scientific Reports, Tea-makorn and Kosinski describe how they found no evidence for couples looking more alike as time passed. They did, however, look more alike than random pairs of people at the start of their relationship. Tea-makorn said people may seek out similar-looking partners, just as they look for mates with matching values and personalities.

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Two scientists have been awarded the 2020 Nobel Prize in Chemistry for developing the tools to edit DNA. Emmanuelle Charpentier and Jennifer Doudna are the first two women to share the prize, which honours their work on the technology of genome editing. From a report: Their discovery, known as Crispr-Cas9 "genetic scissors", is a way of making specific and precise changes to the DNA contained in living cells. They will split the prize money of 10 million krona ($1,110,400). The women's technology has been transformative for basic science research and it could also be used to treat, or even cure, inherited illnesses. Prof Charpentier, from the Max Planck Unit for the Science of Pathogens in Berlin, said it was an emotional moment when she learned about the award. "When it happens, you're very surprised, and you think it's not real. But obviously it's real," she said.

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An anonymous reader quotes a report from The Guardian: For despite having evolved facial expressions that tug on the heartstrings of owners, researchers have found that unlike humans, dogs do not have brain regions that respond specifically to faces. "It's amazing dogs do so well when it comes to reading emotions and identify from faces, despite the fact that they seem not to have a brain designed for having a focus on [them]," said Dr Attila Andics, co-author of the study from Eotvos Lorand University, Hungary. Writing in the Journal of Neuroscience, Andics and colleagues report how they scanned the brains of 20 family dogs, including labradors and border collies, and 30 humans with each shown six sequences of 48 videos of either the front or the back of a human or dog head. The team found particular regions of the dog's brain showed differing activity depending on the species shown, with a greater response to dog videos. However, there was no difference in any region when dogs were shown a human or dog face compared with the back of its head. By contrast, regions of the human brain showed different activity depending whether a face or the back of a head was shown, with faces generally generating a stronger response. A small subset of these regions also showed a difference between species, in general showing a stronger response to humans. Andics said the further analysis showed the dog brain was primarily focused on whether the animal was looking at a dog or a human, whereas the human brain was mainly focused on whether there was a face.

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Uncertainty can be hard for humans. It drives anxiety, an emotion neuroscientists are trying to understand and psychologists are trying to better treat. From a report: Under the threat of a virus, job insecurity, election uncertainty, and a general pandemic life-in-limbo that is upending school, holidays and more, people are especially anxious. Before the pandemic, anxiety was already climbing in the U.S., especially among young adults, according to a recent study. Add the pandemic and its many unknowns: 35% of adults in the Household Pulse Survey reported symptoms of anxiety disorder in July. (In the first half of 2019, it was roughly 8%.) "We have anxiety for a reason," says Stephanie Gorka, who studies the neurobiology of anxiety and treatments for anxiety-related disorders and phobias at the Ohio State University. Anxiety alerts people to pay attention to their environment and is key to our survival, but if it is chronic or excessive, it can have negative health consequences, she says. But how exactly the brain responds to uncertainty and leads to anxiety is unclear.

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An anonymous reader quotes a report from Popular Mechanics: For the first time, scientists have observed an interaction of a rare and baffling form of matter called time crystals. The crystals look at a glance like "regular" crystals, but they have a relationship to time that both intrigues and puzzles scientists because of its unpredictability. Now, experts say they could have applications in quantum computing. [...] Researchers say they've collided two time crystals to see what happens next. "Our results demonstrate that time crystals obey the general dynamics of quantum mechanics and offer a basis to further investigate the fundamental properties of these phases, opening pathways for possible applications in developing fields, such as quantum information processing," they explain in a new paper. In their experiments, they placed two time crystals in superfluid and mixed magnons between them. Magnons are a magnetic quasiparticle that, in this case, led to "opposite-phase oscillations," while the crystals themselves stayed phase stable. What's cool (and, literally, supercooled) is how the matter acts within predictable quantum mechanical ways despite the central quality of wild oscillation patterns over time. "Before this, nobody had observed two time crystals in the same system, let alone seen them interact," lead author Samuli Autti, of Lancaster University, said in a statement. "Controlled interactions are the number one item on the wish list of anyone looking to harness a time crystal for practical applications, such as quantum information processing."

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Michele Solis, writing for Scientific American: In a perfect world, we would learn from success and failure alike. Both hold instructive lessons and provide needed reality checks that may safeguard our decisions from bad information or biased advice. But, alas, our brain doesn't work this way. Unlike an impartial outcome-weighing machine an engineer might design, it learns more from some experiences than others. A few of these biases may already sound familiar: A positivity bias causes us to weigh rewards more heavily than punishments. And a confirmation bias makes us take to heart outcomes that confirm what we thought was true to begin with but discount those that show we were wrong. A new study, however, peels away these biases to find a role for choice at their core. A bias related to the choices we make explains all the others, says Stefano Palminteri of the French National Institute for Health and Medical Research (INSERM), who conducted a study published in Nature Human Behaviour in August that examines this tendency. "In a sense we have been perfecting our understanding of this bias," he says.

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Forget artificial sweeteners. Researchers are now developing new forms of real sugar, to deliver sweetness with fewer calories. But tricking our biology is no easy feat. From a report: Until the late eighteenth century, when sugar production started to become mechanized, most people consumed very little of what nutritionists call "free" or "added" sugars -- sweeteners other than, say, the lactose naturally present in milk and the fructose naturally present in fruit. In 1800, an average American would have lived and died never having encountered a single manufactured candy, let alone the array of sugar-sweetened yogurts, snacks, sauces, dressings, cereals, and drinks that now line supermarket shelves. Today, that average American ingests more than nineteen teaspoons of added sugar every day. Not only does most of that never come into contact with our taste buds; our sweet receptors are also less effective than those for other tastes. Our tongues can detect bitterness at concentrations as low as a few parts per million, but, for a glass of water to taste sweet, we have to add nearly a teaspoon of sugar. DouxMatok's method of restructuring sugar crystals was invented by Baniel's father, Avraham, an industrial chemist. He patented the technique five years ago, when he was ninety-six; today, at the age of a hundred and one, he has finally retired. At one point during my visit, Eran sifted through a pile of his father's memorabilia -- black-and-white photographs, identification cards, university certificates -- to find illustrations for a forthcoming presentation about the company. Many of the photographs were new to Eran, and, as he tried to place them, the outline of his father's life emerged: a six-year-old Polish boy sent to boarding school in what was then the British Palestine Mandate; a student at the University of Montpellier; a promising young scientist, strikingly handsome, exempted from serving in the British Army's Palestine Regiment so that he could make bombs in the basement of a paint factory near Haifa. [...] Estella Belfer, a pastry chef who is a judge on the TV show "Bake-Off Israel," hopes to use Incredo exclusively one day, but, recently, she told me about some of the challenges of cooking with it. "To make chocolate, it's easy. I just substitute the sugar with a smaller amount. In shortbread cookies, it is an improvement -- it makes them crispier," she said. "But in the cupcakes and the sponge cakes -- this is where there is an art to using Incredo sugar." Sugar is responsible for much of the tender, springy texture of a good cake; Incredo sugar behaves exactly the same way, but there's a lot less of it, which creates a problem. Belfer told me that she has successfully blended other ingredients, including soluble fibre and plant proteins, to restore the missing bulk and fluffiness -- "but it's not easy."

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University of California at Berkeley has made a big announcement: Transistors based on carbon rather than silicon could potentially boost computers' speed and cut their power consumption more than a thousandfold — think of a mobile phone that holds its charge for months — but the set of tools needed to build working carbon circuits has remained incomplete until now. A team of chemists and physicists at the University of California, Berkeley, has finally created the last tool in the toolbox, a metallic wire made entirely of carbon, setting the stage for a ramp-up in research to build carbon-based transistors and, ultimately, computers. "Staying within the same material, within the realm of carbon-based materials, is what brings this technology together now," said Felix Fischer, UC Berkeley professor of chemistry, noting that the ability to make all circuit elements from the same material makes fabrication easier. "That has been one of the key things that has been missing in the big picture of an all-carbon-based integrated circuit architecture." Heat was used to induce the molecules to join together, in a process Fischer compares to an atomic-scale set of Legos. "They are all precisely engineered so that there is only one way they can fit together. It's as if you take a bag of Legos, and you shake it, and out comes a fully assembled car. That is the magic of controlling the self-assembly with chemistry..." "I believe this technology will revolutionize how we build integrated circuits in the future..." Fischer said.

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An anonymous reader quotes a report from The New York Times: The medal awarded on Friday lauded the "lifesaving bravery and devotion to duty" for work detecting land mines in Cambodia. Its recipient: a rat named Magawa. Magawais the first rat to receive the award -- a gold medal bestowed by the People's Dispensary for Sick Animals, a British charity, that is often called the "animal's George Cross" after an honor usually given to civilians that recognizes acts of bravery and heroism. Not since the fictional Remy of the 2007 Disney-Pixar film "Ratatouille" has a rat done so much to challenge the public's view of the animals as creatures more commonly seen scuttling through sewers and the subway: Magawa has discovered 39 land mines and 28 pieces of unexploded ordnance, and helped clear more than 1.5 million square feet of land over the past four years. More than five million land mines are thought to have been laid in Cambodia during the ousting of the Khmer Rouge and internal conflicts in the 1980s and 1990s. Parts of the country are also littered with unexploded ordnance dropped in United States airstrikes during the Vietnam War, a 2019 report from the Congressional Research Service found. Since 1979, more than 64,000 people have been injured by land mines and other explosives in Cambodia, and more than 25,000 amputees have been recorded there, according to the HALO Trust, the world's largest humanitarian land mine clearance charity. Magawa, the most successful rat to have taken part in the program, was trained to detect TNT, the chemical compound within explosives. The ability to sniff out TNT makes him much faster than any person in searching for land mines, as he can ignore scrap metal that would usually be picked up by a metal detector. He can search an area the size of a tennis court in 30 minutes, whereas a person with a metal detector would usually take four days to search an area of that size. When he finds a mine, he signals to his handler by scratching at the earth above it. Unlike humans, Magawa is too light to detonate a mine, so there is minimal risk of injury.

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Research unveiled on Thursday in Science finds that crows know what they know and can ponder the content of their own minds, a manifestation of higher intelligence and analytical thought long believed the sole province of humans and a few other higher mammals. STAT reports: "Together, the two papers show that intelligence/consciousness are grounded in connectivity and activity patterns of neurons" in the most neuron-dense part of the bird brain, called the pallium, neurobiologist Suzana Herculano-Houzel of Vanderbilt University, who wrote an analysis of the studies for Science, told STAT. "Brains can appear diverse, and at the same time share profound similarities. The extent to which similar properties present themselves might be simply a matter of scale: how many neurons are available to work." The study shows that neurons in the most complex part of the crows' brain, the pallium, "do have activity that represents not what was shown to them, but what they later report," said Herculano-Houzel. Neurons "represent what the animals next report to have seen -- whether or not that is what they were shown," she said. The neurons figure this out, so to speak, during the time lapse between when Nieder tells the birds the rule and when they peck the target to indicate their answer. "That's exactly what one would expect from neurons that participated in building the thoughts that we later report," she said, suggesting that corvids "are as cognitively capable as monkeys and even great apes." A second study, also in Science, looked in unprecedented detail at the neuroanatomy of pigeons and barn owls, finding hints to the basis of their intelligence that likely applies to corvids', too. STAT reports: Specifically, the pigeons' and owls' neurons meet at right angles, forming computational circuits organized in columns. "The avian version of this connectivity blueprint could conceivably generate computational properties reminiscent of the [mammalian] neocortex," they write. "[S]imilar microcircuits ... achieve largely identical cognitive outcomes from seemingly vastly different forebrains." That is, evolution invented connected, circuit-laden brain structure at least twice. "In theory, any brain that has a large number of neurons connected into associative circuitry ... could be expected to add flexibility and complexity to behavior," said Herculano-Houzel. "That is my favorite operational definition of intelligence: behavioral flexibility." That enables pigeons to home, count, and be as trainable as monkeys. But for sheer smarts we're still in the corvid camp.

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In mice and one person, scientists were able to reproduce out-of-body experiences often associated with ketamine by inducing certain brain cells to fire together in a slow-rhythmic fashion. The findings have been published in the journal Nature. NPR reports: "There was a rhythm that appeared and it was an oscillation that appeared only when the patient was dissociating," says Dr. Karl Deisseroth, a psychiatrist and neuroscientist at Stanford University. Dissociation is a brain state in which a person feels separated from their own thoughts, feelings and body. It is common in people with some mental illnesses, or who have experienced a traumatic event. It can also be induced by certain drugs, including ketamine and PCP (angel dust). Deisseroth's lab made the discovery while studying the brains of mice that had been given ketamine or other drugs that cause dissociation. The team was using technology that allowed them to monitor the activity of cells throughout the brain "It was like pointing a telescope at a new part of the sky," Deisseroth says. "And something really unexpected jumped out at us." What jumped out was a very distinct rhythm produced by cells in an area involved in learning and navigation. Those cells were firing three times each second. To learn more, the team used a tool called optogenetics, which Deisseroth helped invent. It uses light to control the firing of specific cells in the brain. As a result, the team was able to artificially generate this rhythm in the brains of mice. We could see, right before our eyes, dissociation happening," Deisseroth says.

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Scientists have produced gene-edited animals they say could serve as "super dads" or "surrogate sires." The BBC reports: The pigs, goats, cattle and mice make sperm carrying the genetic material of donor animals. The researchers used a hi-tech gene editing tool to knock out a male fertility gene in animal embryos. The animals were born sterile, but began producing sperm after an injection of sperm-producing cells from donor animals. The technique would enable surrogate males to sire offspring carrying the genetic material of valuable elite animals such as prize bulls, said a US-UK team. This would be a step towards genetically enhancing livestock to improve food production, they added. Further reading: EurekAlert

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An anonymous reader quotes a report from the BBC: The distinctive Pringles tube is being re-designed after criticism that it's almost impossible to recycle. The current container for the potato-based snack was condemned as a recycler's nightmare. It's a complex construction with a metal base, plastic cap, metal tear-off lid, and foil-lined cardboard sleeve. The Recycling Association dubbed it the number one recycling villain -- along with the Lucozade Sports bottle. Now Pringles' maker Kellogg's is trialling a simpler can -- although experts say it's not a full solution. The existing version is particularly troublesome because it combines so many different materials Some 90% of the new can is paper. Around 10% is a polyal (plastic) barrier that seals the interior to protect the food against oxygen and moisture which would damage the taste. But how about the lid? Well, two options are on trial in some Tesco stores -- a recyclable plastic lid and a recyclable paper lid. Kellogg's says these lids will still produce the distinctive "pop" associated with the product. [Simon Ellin from the Recycling Association] said the polyal-coated card might be recyclable but the product would need to be tested in recycling mills. And what of the much-criticised Lucozade Sports bottle? Mr Ellin said its unchanged basic design was still a big problem, as machines found it hard to differentiate the plastic in the bottle and the plastic that makes up its outer sleeve. He called on the makers, Suntory, to reduce the size of the external sleeve, as it has with the new Ribena bottle.

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fahrbot-bot writes: It's one of the oddest tenets of quantum theory: a particle can be in two places at once -- yet we only ever see it here or there. Textbooks state that the act of observing the particle "collapses" it, such that it appears at random in only one of its two locations. But physicists quarrel over why that would happen, if indeed it does. Now, one of the most plausible mechanisms for quantum collapse -- gravity -- has suffered a setback. The gravity hypothesis traces its origins to Hungarian physicists Karolyhazy Frigyes in the 1960s and Lajos Diosi in the 1980s. The basic idea is that the gravitational field of any object stands outside quantum theory. It resists being placed into awkward combinations, or "superpositions," of different states. So if a particle is made to be both here and there, its gravitational field tries to do the same -- but the field cannot endure the tension for long; it collapses and takes the particle with it. Still, the hypothesis seemed impossible to probe with any realistic technology, notes Diosi, now at the Wigner Research Center, and a co-author on the new paper. "For 30 years, I had been always criticized in my country that I speculated on something which was totally untestable." New methods now make this doable. In the new study, Diosi and other scientists looked for one of the many ways, whether by gravity or some other mechanism, that a quantum collapse would reveal itself: A particle that collapses would swerve randomly, heating up the system of which it is part. "It is as if you gave a kick to a particle," says co-author Sandro Donadi of the Frankfurt Institute for Advanced Studies. If the particle is charged, it will emit a photon of radiation as it swerves. And multiple particles subject to the same gravitational lurch will emit in unison. "You have an amplified effect," says co-author Catalina Curceanu of National Institute for Nuclear Physics in Rome.

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