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.

sciencehabit writes: A number of animals, from dogs to chimpanzees, can imitate human behavior. Now scientists have shown that cats can too. Under controlled conditions, a Japanese cat named Ebisu copied the movements of her owner when she touched a cardboard box and rubbed her face against it. Researchers say it's evidence of complex cognition, because the cat must be able to "map" the human's body parts onto her own. The finding may also suggest that the ability to imitate arose earlier in mammalian evolution than previously thought. The study has been published in the journal Science.

An anonymous reader quotes a report from The Guardian: Doctors believe they are closer to a treatment for multiple sclerosis after discovering a drug that repairs the coatings around nerves that are damaged by the disease. A clinical trial of the cancer drug bexarotene showed that it repaired the protective myelin sheaths that MS destroys. The loss of myelin causes a range of neurological problems including balance, vision and muscle disorders, and ultimately, disability.

While bexarotene cannot be used as a treatment, because the side-effects are too serious, doctors behind the trial said the results showed "remyelination" was possible in humans, suggesting other drugs or drug combinations will halt MS. "It's disappointing that this is not the drug we'll use, but it's exciting that repair is achievable and it gives us great hope for another trial we hope to start this year," said Prof Alasdair Coles, who led the research at the University of Cambridge. The drug had some serious side-effects, from thyroid disease to raised levels of fats in the blood, which can lead to dangerous inflammation of the pancreas. But brain scans revealed that neurons had regrown their myelin sheaths, a finding confirmed by tests that showed signals sent from the retina to the visual cortex at the back of the brain had quickened. "That can only be achieved through remyelination," said Coles.

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.

"Every musician knows that when the performers can hear one another, the performance is always better than otherwise," writes Slashdot reader nightcats. "This principle applies in nature as well, and has been anecdotally witnessed amid the quiet imposed by COVID-19 on cities around the world. In San Francisco, behavioral ecologist Liz Derryberry has been able to deliver a dramatic scientific demonstration of the changes to the songs of the white-crowned sparrow amid the quiet of 2020." National Geographic reports: With most San Franciscans staying at home due to the coronavirus pandemic, she decided to seize an unprecedented opportunity to study how this small, scrappy songbird responded when human noises disappeared. By recording the species' calls among the abandoned streets of the Bay Area in the following months, Derryberry and colleagues have revealed that the shutdown dramatically improved the birds' calls, both in quality and efficiency. The research, published today in Science, is among the first to scientifically evaluate the effects of the pandemic on urban wildlife. It also adds to a burgeoning field of research into how the barrage of human-made noise has disrupted nature, from ships drowning out whale songs to automobile traffic jamming bat sonar.

Rose Pastore reporting via Gizmodo: A new way of producing powerful X-ray beams -- the brightest on Earth -- is now making it possible to create 3D images of matter at astounding resolutions. This "Extremely Brilliant Source" officially opened last month at the European Synchrotron Radiation Facility in France, and scientists are already using it to study the coronavirus behind covid-19. These X-ray beams will image the interiors of fossils, brains, batteries, and countless other interesting items down to the atomic scale, revealing unprecedented information and supercharging scientific research.

A typical medical X-ray, like you would get for a broken bone, can show doctors details about your particular fracture and the tissue around it. X-rays penetrate the body and are absorbed at different rates by different tissue; once they've passed through you, they hit a detector, creating the familiar black-and-white X-ray image. The Extremely Brilliant Source produces X-rays 10 trillion times more powerful than those used in hospitals. With such a beam, scientists could create a 3D image of your broken bone so detailed that they could see the individual atoms in the blood cells surrounding your fracture. Of course, you wouldn't want to be hit with this particular beam -- the dose of radiation would be fatal.

The possibilities that the Extremely Brilliant Source opens up feel endless. One area that particularly excites Francesco Sette, director general of the ESRF, is research into the structure and functioning of brains, which could eventually enable brain-like electronics. "It would be a major revolution, not only for neuroscience, but also for all those applications that are coming up to use possibly the human brain architecture for a new generation of devices," he said.

Saad Bhamla, an undergraduate in Mumbai, India, has invented a do-it-yourself hearing aid made from inexpensive, easy-to-find parts. "At bulk rates, Bhamla says, it would cost just under $1 to make," reports Science Magazine. "But anyone with the freely available blueprints and a soldering iron can make their own for not much more -- maybe $15 or $20, Bhamla says." From the report: Inspired by his grandparents and a hearing-impaired colleague -- who is the first author on the new paper -- Bhamla and his team set out to develop a cheap hearing aid built with off-the-shelf parts. They soldered a microphone onto a small circuit board to capture nearby sound and added an amplifier and a frequency filter to specifically increase the volume of high-pitch sounds above 1000 hertz. Then they added a volume control, an on/off switch, and an audio jack for plugging in standard earphones, as well as a battery holder. The device, dubbed LoCHAid, is the size of a matchbox and can be worn like a necklace.

Next, Bhamla and his colleagues tested the device. They found that it boosted the volume of high-pitch sounds by 15 decibels while preserving volumes at lower pitches. It also filtered out interference and sudden, loud sounds like dog barks and car horns. Finally, tests with an artificial ear revealed that LoCHAid might improve speech recognition, by bringing conversations closer to the quality heard by healthy individuals. It complied with five out of six of the World Health Organization's preferred product recommendations for hearing aids, the researchers report today in PLOS ONE. There are some drawbacks. The device can't be fine-tuned for individual needs, and the researchers anticipate that LoCHAid's parts will wear out after about a year and a half. It's also bulky, though a smaller version is in development.

Bhamla notes that it needs to be clinically tested before his device can be sold as a "hearing aid" in the United States.

The supermassive black hole at the center of the M87 galaxy has a shadow crescent that moves, like a dancer in the dark. From a report: Over a year ago, scientists unleashed something incredible on the world: the first photo of a black hole ever taken. By putting together radio astronomy observations made with dishes across four continents, the collaboration known as the Event Horizon Telescope managed to peer 53 million light-years away and look at a supermassive black hole, which is 6.5 million times the mass of the sun and sits at the center of the galaxy Messier 87 (M87). The fiery historic image showed off a bright crescent of ultra-hot gas and debris orbiting the black hole's event horizon, the pitch-black central point-of-no-return that traps anything that goes over, even light. The EHT team had just made one of the most impressive achievements in the history of astronomy, but this was only the beginning. On Wednesday, members of the EHT collaboration published new findings in the Astrophysical Journal about M87's supermassive black hole (known as M87*), revealing two new major insights.

First, the shadow diameter of the event horizon doesn't change over time, which is exactly what Einstein's theory of general relativity predicts for a supermassive black hole of M87*'s size. However, the second insight is that the bright crescent adorning this shadow is far from stable: it wobbles. There's so much turbulent matter surrounding M87* that it makes sense the crescent would bug out and get fidgety. But the fact that we can watch it over time means we now have an established method for studying the physics of one of the most extreme kinds of environment in the entire universe.

An anonymous reader quotes a report from Scientific American: Stomach ulcers and other gastric wounds afflict one in eight people worldwide, but common conventional therapies have drawbacks. Now scientists aim to treat such problems by exploring a new frontier in 3-D printing: depositing living cells directly inside the human body. [...] In their effort to treat stomach lesions less invasively, scientists in China wanted to develop a miniature bioprinting robot that could enter the human body with relative ease. The researchers used existing techniques for creating dexterous electronic devices, such as mechanical bees and cockroach-inspired robots, says the study's senior author Tao Xu, a bioengineer at Tsinghua University in Beijing.

The resulting micro robot is just 30 millimeters wide -- less than half the width of a credit card -- and can fold to a length of 43 millimeters. Once inside a patient's body, it unfolds to become 59 millimeters long and can start bioprinting. "The team has constructed clever mechanisms that make the system compact when entering the body yet unfurl to provide a large working area once past the tight constrictions at entry," says David Hoelzle, a mechanical engineer at the Ohio State University, who did not take part in the study. In their experiments, the researchers in China fitted the micro robot onto an endoscope (a long tube that can be inserted through bodily openings) and successfully snaked it through a curved pipe into a transparent plastic model of a stomach. There, they used it to print gels loaded with human stomach lining and stomach muscle cells (which were grown in culture by a commercial laboratory) onto a lab dish. The printed cells remained viable and steadily proliferated over the course of 10 days. "This study is the first attempt to combine micro robots and bioprinting together," Xu says. The study has been published in the journal Biofabrication.

A team of scientists from the Singapore University of Technology and Design discovered that, using simple chemistry, the organic polymer chitin -- contained in the exoskeletons of insects and crustaceans -- can easily be transformed into a viable building material for basic tools and habitats. The findings have been published in the journal PLOS ONE. Ars Technica reports: "The technology was originally developed to create circular ecosystems in urban environments," said co-author Javier Fernandez. "But due to its efficiency, it is also the most efficient and scalable method to produce materials in a closed artificial ecosystem in the extremely scarce environment of a lifeless planet or satellite." [T]he authors of the current paper point out that most terrestrial manufacturing strategies that could fit the bill typically require specialized equipment and a hefty amount of energy. However, "Nature presents successful strategies of life adapting to harsh environments," the authors wrote. "In biological organisms, rigid structures are formed by integrating inorganic filler proceed from the environment at a low energy cost (e.g., calcium carbonate) and incorporated into an organic matrix (e.g., chitin) produced at a relatively high metabolic cost."

Fernandez and his colleagues maintain that chitin is likely to be part of any planned artificial ecosystem because it is so plentiful in nature. It's the primary component of fish scales and fungal cell walls, for example, as well as the exoskeletons of crustaceans and insects. In fact, insects have already been targeted as a key source of protein for a possible Martian base. And since the chitin component of insects has limited nutritional value for humans, extracting it to make building materials "does not hamper or compete with the food supply," the authors wrote. "Rather, it is a byproduct of it."

With space junk piling up around our planet, the International Space Station needed to perform a last-minute avoidance maneuver Tuesday to steer clear of an "unknown piece of space debris expected to pass within several kilometers." From a report: Mission Control in Houston conducted the move at 2:19 p.m. PT using the Russian Progress resupply spacecraft docked to the ISS to help nudge the station out of harm's way. "Out of an abundance of caution, the Expedition 63 crew will relocate to their Soyuz spacecraft until the debris has passed by the station," NASA said in a statement prior to the move. The maneuver went off smoothly, NASA administrator Jim Bridenstine reported. "The astronauts are coming out of safe haven," he tweeted after the ISS relocated.

sciencehabit writes: A mini-arms race is unfolding in the supposed field of quantum radar, spurred by press reports in 2016 that China had built one -- potentially threatening the ability of stealthy military aircraft to hide from conventional radars. Governments around the world have tasked physicists to look into the idea. Whereas a conventional radar searches for objects by detecting pulse of microwaves reflected from them, quantum radar would utilize pulses of microwaves linked by a quantum connection called entanglement. The system would retain one pulse and measure it in concert with the one reflected from the object. Correlations between the two would make it easier to spot an object through the glare of the surroundings. Or so researchers hoped. Groups have demonstrated elements of a quantum radar, but only in limited experiments that a nonquantum system can still match. And fundamental physical limits suggest the scheme can't beat ordinary radar for long-range detection. Even one of the inventors of the basic concept thinks it won't work when applied to radar.

Plastic face shields are almost totally ineffective at trapping respiratory aerosols, according to modelling in Japan, casting doubt on their effectiveness in preventing the spread of coronavirus. From a report: A simulation using Fugaku, the world's fastest supercomputer, found that almost 100% of airborne droplets of less than 5 micrometres in size escaped through plastic visors of the kind often used by people working in service industries. One micrometre is one millionth of a metre. In addition, about half of larger droplets measuring 50 micrometres found their way into the air, according to Riken, a government-backed research institute in the western city of Kobe.

This week, senior scientists in Britain criticised the government for stressing the importance of hand-washing while placing insufficient emphasis on aerosol transmission and ventilation, factors that Japanese authorities have outlined in public health advice throughout the pandemic. As some countries have attempted to open up their economies, face shields are becoming a common sight in sectors that emphasise contact with the public, such as shops and beauty salons. Makoto Tsubokura, team leader at Riken's centre for computational science, said the simulation combined air flow with the reproduction of tens of thousand of droplets of different sizes, from under 1 micrometre to several hundred micrometres.

Last year, NASA had said that in four years, it would be landing the first woman ever on the moon, and returning to Earth's only natural satellite for the first time since 1972, through its Artemis programme. Now, in a release on September 22, NASA has shared an update outlining its plan, announcing a whopping $28 billion plan for the return to the lunar surface. From a report: The funds are all going to be used for the development of machinery; one billion dollars of the budget will go directly to the development of a commercial human lunar system that will take humans to the moon's surface. An allotment of $651 million will be used to support the Orion Spacecraft and the rocket that Boeing is building for the moon mission -- called the Space Launch System or SLS, on which NASA has already spent at least $11.9 billion.

The mission is named Artemis after the Greek goddess of the moon and the twin sister of Apollo. It's the antithesis to the NASA mission which last landed humans on the moon, Apollo 17. Only 12 humans, all male, have ever walked on the moon and they were all American, according to Bettina Inclan, NASA Communications Director. And with Artemis, they are finally planning to launch women on our satellite too. Currently, there are just 12 active women astronauts, excluding the five other female astronauts who graduated from training earlier this year. The crew for the 2024 mission, however, has not yet been named. According to NASA Administrator Jim Bridenstine, the first woman to walk on the moon would be somebody "who has been proven, somebody who has flown, somebody who has been on the International Space Station already."

America is now under siege by climate change in ways that scientists have warned about for years. But there is a second part to their admonition: Decades of growing crisis are already locked into the global ecosystem and cannot be reversed. From a report: This means the kinds of cascading disasters occurring today -- drought in the West fueling historic wildfires that send smoke all the way to the East Coast, or parades of tropical storms lining up across the Atlantic to march destructively toward North America -- are no longer features of some dystopian future. They are the here and now, worsening for the next generation and perhaps longer, depending on humanity's willingness to take action. "I've been labeled an alarmist," said Peter Kalmus, a climate scientist in Los Angeles, where he and millions of others have inhaled dangerously high levels of smoke for weeks. "And I think it's a lot harder for people to say that I'm being alarmist now." Last month, before the skies over San Francisco turned a surreal orange, Death Valley reached 130 degrees Fahrenheit, the highest temperature ever measured on the planet. Dozens of people have perished from the heat in Phoenix, which in July suffered its hottest month on record, only to surpass that milestone in August.

Conversations about climate change have broken into everyday life, to the top of the headlines and to center stage in the presidential campaign. The questions are profound and urgent. Can this be reversed? What can be done to minimize the looming dangers for the decades ahead? Will the destruction of recent weeks become a moment of reckoning, or just a blip in the news cycle? The Times spoke with two dozen climate experts, including scientists, economists, sociologists and policymakers, and their answers were by turns alarming, cynical and hopeful. "It's as if we've been smoking a pack of cigarettes a day for decades" and the world is now feeling the effects, said Katharine Hayhoe, a climate scientist at Texas Tech University. But, she said, "we're not dead yet." Their most sobering message was that the world still hasn't seen the worst of it. Gone is the climate of yesteryear, and there's no going back. The effects of climate change evident today are the results of choices that countries made decades ago to keep pumping heat-trapping greenhouse gases into the atmosphere at ever-increasing rates despite warnings from scientists about the price to be paid.

An anonymous reader shares a report: Everyone's favorite mathematical constant has received an inadvertent tribute from the universe. A team led by MIT researchers discovered a distant planet that orbits its star every 3.14 days, mirroring the famous first three digits of pi. MIT described the rocky Earth-sized planet K2-315b as "baking hot" and "likely not habitable" in a statement on Monday. "The planet moves like clockwork," said MIT graduate student Prajwal Niraula, lead author of a paper on the planet published in the Astronomical Journal this week. The team found the exoplanet (a planet located outside our solar system) in data gathered in 2017 by NASA's Kepler Space Telescope K2 mission. The planet-finding telescope was put into a permanent sleep mode in 2018. The researchers confirmed the planet's existence by taking another look with the ground-based Speculoos telescope network. "Speculoos" stands for "Search for habitable Planets EClipsing ULtra-cOOl Stars." It's also a fun reference to a type of spiced cookie.

Two professors at the University of Massachusetts have co-authored a new essay explaining how open source licensing "could keep Big Pharma from making huge profits off taxpayer-funded research" in the international, multi-billion-dollar race for a Covid-19 vaccine: The invention of the "General Public License," sometimes referred to as a viral or reciprocal license, meant that should an improvement be made, the new software version automatically inherits the same license as its parent. We believe that in a time of a global pandemic, a safe and effective COVID-19 vaccine should be licensed with General Public License-like properties...

Fortunately, some pharmaceutical companies, national governments, nonprofits like the Bill & Melinda Gates Foundation and international organizations like the Coalition for Epidemic Preparedness Initiatives — which supports vaccine development — are putting policies in place that embrace openness and sharing rather than intellectual property protection. Coalition for Epidemic Preparedness Initiatives officials have stated that all of their funding agreements require that "appropriate vaccines are first available to populations when and where they are needed to end an outbreak or curtail an epidemic, regardless of ability to pay." That's an important start.

However, when there is a safe, effective COVID-19 vaccine, the U.S. and other national governments need to create contractual agreements with firms that provide fair and reasonable funding to cover their costs or even some reasonable profit margin while still mandating the open sharing of the processes for vaccine production, quality assurance and rapid global distribution.

CNN reports: A planned reality show will seek to give the winner of its on-air competition "the greatest prize ever given out on Earth" — a 10-day stay on the International Space Station...

The production company's press release said that the team is "now looking for global brand and primary distribution partners." Space Hero is planning to open the application process for the show in the first half of 2021 before broadcasting begins in 2022, a spokesperson said via email Friday... Space Hero, which is headed by a former News Corp executive named Marty Pompadur, said it is working with Texas-based startup Axiom Space to coordinate the trip into orbit.

Axiom was co-founded and led by Michael Suffredini, who led NASA's International Space Station Program from 2005 to 2015. The company plans to serve as a go-between for NASA, launch providers such as SpaceX and Boeing, and any private-sector individuals interested in booking rides to space for tourism, entertainment or other business purposes. Axiom has also said it can provide all the training necessary to prepare individuals for a trip to the ISS...

Private citizens have visited the space station before: A company called Space Adventures previously organized eight trips to the International Space Station for ultra-wealthy travelers between 2001 and 2009 using Russian Soyuz spacecraft. Allowing tourists and other private citizens to make use of the space station — via SpaceX's or Boeing's new spacecraft — is part of NASA's goal of commercializing outer space.
CNN notes that Axiom is also handling the training and coordination for that Tom Cruise movie that's going to be filmed in space.

"Earlier this week, scientists announced the discovery of phosphine on Venus, a potential signature of life. Now, in an amazing coincidence, a European and Japanese spacecraft is about to fly past the planet — and could confirm the discovery," writes Forbes. A Slashdot reader shares their report: BepiColombo, launched in 2018, is on its way to enter orbit around Mercury, the innermost planet of the Solar System. But to achieve that it plans to use two flybys of Venus to slow itself down, one on October 15, 2020, and another on August 10, 2021. The teams running the spacecraft already had plans to observe Venus during the flyby. But now, based on this detection of phosphine from telescopes on Earth, they are now planning to use both of these flybys to look for phosphine using an instrument on the spacecraft...

As this first flyby is only weeks away, however, the observation campaign of the spacecraft is already set in stone, making the chance of a discovery slim. More promising is the second flyby next year, which will not only give the team more time to prepare, but also approach just 550 kilometers from Venus...

If a detection can be made, it would provide independent verification of the presence of phosphine in the atmosphere of Venus. And for future missions planning to visit the planet, which alongside Rocket Lab's mission includes potential spacecraft from NASA, India, Russia, and Europe, that could be vital information.

"Russia has announced an intention to independently explore Venus a day after scientists said there was a gas that could be present in the planet's clouds due to single-cell microbes," reports Euronews: The head of Russia's space corporation Roscosmos, Dmitry Rogozin, told reporters that they would initiate a national project as "we believe that Venus is a Russian planet," according to the TASS news agency. In a statement, Roscosmos noted that the first missions to explore Venus were carried out by the Soviet Union. "The enormous gap between the Soviet Union and its competitors in the investigation of Venus contributed to the fact that the United States called Venus a Soviet planet," Roscosmos said.

The Russians claim to have extensive material that suggests that some objects on the Venusian surface have changed places or could be alive, although these are hypotheses that have yet to be confirmed.

The national project would be in addition to the "Venera-D" project that the Russians are working on with the US' National Aeronautics and Space Administration... Roscosmos said they would study the soil and atmosphere of the planet as well as the "evolutionary processes of Venus, which allegedly suffered a climatic catastrophe associated with the greenhouse effect."