Tech News
Plato's Final Hours Recounted In Scroll Found In Vesuvius Ash
science - Posted On:2024-05-05 10:45:00 Source: slashdot
An anonymous reader shared this report from the Guardian: Newly deciphered passages from a papyrus scroll that was buried beneath layers of volcanic ash after the AD79 eruption of Mount Vesuvius may have shed light on the final hours of Plato, a key figure in the history of western philosophy. In a groundbreaking discovery, the ancient scroll was found to contain a previously unknown narrative detailing how the Greek philosopher spent his last evening, describing how he listened to music played on a flute by a Thracian slave girl. Despite battling a fever and being on the brink of death, Plato — who was known as a disciple of Socrates and a mentor to Aristotle, and who died in Athens around 348BC — retained enough lucidity to critique the musician for her lack of rhythm, the account suggests.... In a presentation of the research findings at the National Library of Naples, Prof Graziano Ranocchia, of the University of Pisa, who spearheaded the team responsible for unearthing the carbonised scroll, described the discovery as an "extraordinary outcome that enriches our understanding of ancient history". He said: "Thanks to the most advanced imaging diagnostic techniques, we are finally able to read and decipher new sections of texts that previously seemed inaccessible... For the first time, we have been able to read sequences of hidden letters from the papyri that were enfolded within multiple layers, stuck to each other over the centuries, through an unrolling process using a mechanical technique that disrupted whole fragments of text." Read more of this story at Slashdot.
Breakthrough Achieved In Nanometer-Resolution Imaging of 3D Chemistry
science - Posted On:2024-05-05 07:45:01 Source: slashdot
"A leap in our ability to see the chemistry of matter in three-dimensions at the nanoscale was achieved, allowing scientists to understand how nanomaterials are chemically arranged," writes Slashdot reader Hovden: Traditionally, seeing matter at the smallest sizes requires too many high-energy electrons for 3D chemical imaging. The high beam exposure destroys the specimen before an experiment is completed. Even larger doses are required to achieve high resolution. Thus, chemical mapping in 3D has been unachievable except at lower resolution with the most radiation-hard materials. High-resolution 3D chemical imaging is now achievable near or below one-nanometer resolution. A team from Dow Chemical and the University of Michigan used a newly introduced method, called multi-modal data fusion, high-resolution chemical tomography, that provides 99% less dose by linking information encoded within both elastic and inelastic scattered signals. The researchers showed sub-nanometer 3D resolution of chemistry is measurable for a broad class of geometrically and compositionally complex materials. "Here are the pretty pictures," adds long-time Slashdot reader thoper. Phys.org also has this quote from Robert Hovden, an associate professor of materials science and engineering at the University of Michigan and corresponding author on the study published in Nature Communications. "Seeing invisible worlds, far smaller than the wavelengths of light, is absolutely critical to understanding the matter we are engineering at the nanoscale, not just in 2D but in 3D as well." Read more of this story at Slashdot.
U.S. Seeks to Build World Pressure on Russia Over Space Nuclear Weapon
science - Posted On:2024-05-04 18:30:00 Source: slashdot
An anonymous reader shared this report from the New York Times: American officials are trying to increase international pressure on Russia not to deploy an antisatellite nuclear weapon in space, and have obtained information that undermines Moscow's explanation that the device it is developing is for peaceful scientific purposes, a senior State Department official said on Friday... On Friday, Mallory Stewart, the assistant secretary of state for arms control, said that while the United States had been aware of Russia's pursuit of such a device for years, "only recently have we been able to make a more precise assessment of their progress." Ms. Stewart, speaking at the nonpartisan Center for Strategic and International Studies in Washington, said the orbit the Russian satellite would occupy is in a high-radiation region not used by other satellites, information that undercuts Russia's defense that it is not developing a weapon. Read more of this story at Slashdot.
NASA's Moon Capsule Suffered Extensive Damage During 2022's Test Flight
science - Posted On:2024-05-04 15:45:00 Source: slashdot
An anonymous reader shared this report from the Washington Post: The heat shield of the Orion spacecraft intended one day to carry astronauts to the moon under NASA's Artemis program suffered unexpected damage in more than 100 places as the spacecraft returned to Earth during an uncrewed test flight in 2022, according to a watchdog report released late Wednesday. While the capsule withstood the fiery tumult of reentry, when temperatures reached 5,000 degrees Fahrenheit as it plunged through the atmosphere at nearly 25,000 mph, the damage the heat shield suffered was far greater than NASA engineers had expected and more severe than NASA had revealed previously. Photos of the heat shield in the report showed gouges that look like small potholes. "Should the same issue occur on future Artemis missions, it could lead to the loss of the vehicle or crew," the report, by NASA's inspector general, concluded... The IG report provides the most detailed description of the issue to date. It also highlighted other problems with the spacecraft that could create significant challenges for the space agency as it seeks to return humans to the lunar surface for the first time in more than 50 years. Portions of the heat shield "wore away differently than NASA engineers predicted, cracking and breaking off the spacecraft in fragments that created a trail of debris rather than melting away as designed," according to the report. That, in turn, "could have caused enough structural damage to cause one of Orion's parachutes to fail...." In addition to the heat shield erosion on Orion, which is manufactured by Lockheed Martin, the IG said several bolts on the crew module "experienced an exposed gap that allowed for increased heating to the bolt interior and greater than expected melting and erosion." Earlier this year, NASA announced the next flight for its moon program — sending a crew of four around the moon — would be delayed, according to the article. The moon-orbiting mission would now occur "no earlier than September 2025, largely because officials wanted to study the heat shield issue further and understand why it eroded as it did." The article adds that this new report "casts doubt on both NASA's rosy original assessment of the test flight" — as well as the likelihood that a lunar landing will occur by late 2026. Read more of this story at Slashdot.
The Highest Observatory On Earth Is Now Open
science - Posted On:2024-05-04 11:45:00 Source: slashdot
The world's highest astronomical site is officially open for business after being in the works for 26 years. Space.com reports: The Japanese University of Tokyo Atacama Observatory, or TAO, which was first conceptualized 26 years ago to study the evolution of galaxies and exoplanets, is perched on top of a tall mountain in the Chilean Andes at 5,640 meters (18,500 feet) above sea level. The facility's altitude surpasses even the Atacama Large Millimeter Array, which is at an elevation of 5,050 meters (16,570 feet). TAO is located on the summit of Atacama's Cerro Chajnantor mountain, whose name means "place of departure" in the now-extinct Kunza language of the indigenous Likan Antai community. The region's high altitude, sparse atmosphere and perennially arid climate is deadly to humans, but makes an excellent spot for infrared telescopes like TAO as their observational accuracies rely on low moisture levels, which render Earth's atmosphere transparent in infrared wavelengths. TAO's 6.5-meter telescope consists of two science instruments designed to observe the universe in infrared, which is electromagnetic radiation with a wavelength longer than visible light but shorter than microwaves. One of the instruments, named SWIMS, will image galaxies from the very early universe to understand how they coalesced out of pristine dust and gas, a process whose specifics remain murky despite decades of research. The second, named MIMIZUKU, will aid the overarching science goal by studying primordial disks of dust within which stars and galaxies are known to form, according to the mission plan. Constructing the telescope on the summit of Mt. Chajnantor "was an incredible challenge, not just technically, but politically too," Yuzuru Yoshii, a professor at the University of Tokyo in Japan who spearheaded TAO since 1998, said in a statement. "I have liaised with Indigenous peoples to ensure their rights and views are considered, the Chilean government to secure permission, local universities for technical collaboration, and even the Chilean Health Ministry to make sure people can work at that altitude in a safe manner." "Thanks to all involved, research I've only ever dreamed about can soon become a reality, and I couldn't be happier," he added. Read more of this story at Slashdot.
Glow of an exoplanet may be from starlight reflecting off liquid iron
Science - Posted On:2024-05-04 08:00:00 Source: arstechnica
Do rainbows exist on distant worlds? Many phenomena that happen on Earth—such as rain, hurricanes, and auroras—also occur on other planets in our Solar System if the conditions are right. Now we have evidence from outside our Solar System that one particularly strange exoplanet might even be displaying something close to a rainbow.
Appearing in the sky as a halo of colors, a phenomenon called a "glory" occurs when light hits clouds made up of a homogeneous substance in the form of spherical droplets. It might be the explanation for a mystery regarding observations of exoplanet WASP-76B. This planet, a scorching gas giant that experiences molten iron rain, has also been observed to have more light on its eastern terminator (a line used to separate the day side from the night side) than its western terminator. Why was there more light on one side of the planet?
After observing it with the CHEOPS space telescope, then combining that with previous observations from Hubble, Spitzer, and TESS, a team of researchers from ESA and the University of Bern in Switzerland now think that the most likely reason for the extra light is a glory.
We still don’t understand how one human apparently got bird flu from a cow
Science - Posted On:2024-05-03 17:45:00 Source: arstechnica
The US Department of Agriculture this week posted an unpublished version of its genetic analysis into the spillover and spread of bird flu into US dairy cattle, offering the most complete look yet at the data state and federal investigators have amassed in the unexpected and worrisome outbreak—and what it might mean.
The preprint analysis provides several significant insights into the outbreak—from when it may have actually started, just how much transmission we're missing, stunning unknowns about the only human infection linked to the outbreak, and how much the virus continues to evolve in cows. The information is critical as flu experts fear the outbreak is heightening the ever-present risk that this wily flu virus will evolve to spread among humans and spark a pandemic.
But, the information hasn't been easy to come by. Since March 25—when the USDA confirmed for the first time that a herd of US dairy cows had contracted the highly pathogenic avian influenza H5N1 virus—the agency has garnered international criticism for not sharing data quickly or completely. On April 21, the agency dumped over 200 genetic sequences into public databases amid pressure from outside experts. However, many of those sequences lack descriptive metadata, which normally contains basic and key bits of information, like when and where the viral sample was taken. Outside experts don't have that crucial information, making independent analyses frustratingly limited. Thus, the new USDA analysis—which presumably includes that data—offers the best yet glimpse of the complete information on the outbreak.
NASA hasn’t landed on the Moon in decades—China just sent its third in six years
Science - Posted On:2024-05-03 17:00:00 Source: arstechnica
China is going back to the Moon for more samples.
On Friday the country launched its largest rocket, the Long March 5, carrying an orbiter, lander, ascent vehicle, and a return spacecraft. The combined mass of the Chang'e-6 spacecraft is about 8 metric tons, and it will attempt to return rocks and soil from the far side of the Moon—something scientists have never been able to study before in-depth.
The mission's goal is to bring about 2 kg (4.4 pounds) of rocks back to Earth a little more than a month from now.
China Launches Moon Probe
science - Posted On:2024-05-03 14:30:00 Source: slashdot
China launched an uncrewed lunar mission Friday that aims to bring back samples from the far side of the moon for the first time, in a potentially major step forward for the country's ambitious space program. From a report: The Chang'e-6 probe -- China's most complex robotic lunar mission to date -- blasted off on a Long March-5 rocket from the Wenchang Space Launch Center in south China's Hainan island, where space fans had gathered to watch the historic moment. The country's National Space Administration said the launch was a success. The launch marks the start of a mission that aims to be a key milestone in China's push to become a dominant space power with plans to land astronauts on the moon by 2030 and build a research base on its south pole. It comes as a growing number of countries, including the United States, eye the strategic and scientific benefits of expanded lunar exploration in an increasingly competitive field. China's planned 53-day mission would see the Chang'e-6 lander touch down in a gaping crater on the moon's far side, which never faces Earth. China became the first and only country to land on the moon's far side during its 2019 Chang'e-4 mission. Any far-side samples retrieved by the Chang'e-6 lander could help scientists peer back into the evolution of the moon and the solar system itself -- and provide important data to advance China's lunar ambitions. Read more of this story at Slashdot.
Mayans burned and buried dead political regimes
Science - Posted On:2024-05-03 14:00:01 Source: arstechnica
As civilizations evolve, so do the political regimes that govern them. But the transition from one era to another is not always quiet. Some ancient Mayan rulers made a very fiery public statement about who was in charge.
When archaeologists dug up the burned fragments of royal bodies and artifacts at the Mayan archaeological site of Ucanal in Guatemala, they realized they were looking at the last remnants of a fallen regime. There was no scorching on the walls of the structure they were found beneath. This could have only meant that the remains (which had already been in their tombs a hundred years) were consumed by flames in one place and buried in another. But why?
The team of archaeologists, led by Christina T. Halperin of the University of Montreal, think this was the doing of a new leader who wanted to annihilate all traces of the old regime. He couldn’t just burn them. He also had to bury them where they would be forgotten.
Two seconds of hope for fusion power
Science - Posted On:2024-05-03 12:45:00 Source: arstechnica
Using nuclear fusion, the process that powers the stars, to produce electricity on Earth has famously been 30 years away for more than 70 years. But now, a breakthrough experiment done at the DIII-D National Fusion Facility in San Diego may finally push nuclear fusion power plants to be roughly 29 years away.
The DIII-D facility is run by General Atomics for the Department of Energy. It includes an experimental tokamak, a donut-shaped nuclear fusion device that works by trapping astonishingly hot plasma in very strong, toroidal magnetic fields. Tokamaks, compared to other fusion reactor designs like stellarators, are the furthest along in their development; ITER, the world’s first power-plant-size fusion device now under construction in France, is scheduled to run its first tests with plasma in December 2025.
But tokamaks have always had some issues. Back in 1988, Martin Greenwald, a Massachusetts Institute of Technology expert on plasma physics, proposed an equation that described an apparent limit on how dense plasma could get in tokamaks. He argued that maximum attainable density is dictated by the minor radius of a tokamak and the current induced in the plasma to maintain magnetic stability. Going beyond that limit was supposed to make the magnets incapable of holding the plasma, heated up to north of 150 million degrees Celsius away from the walls of the machine.
Rocket Report: Astroscale chases down dead rocket; Ariane 6 on the pad
Science - Posted On:2024-05-03 08:00:01 Source: arstechnica
Welcome to Edition 6.42 of the Rocket Report! There are several major missions set for launch in the next few months. These include the first crew flight on Boeing's Starliner spacecraft, set for liftoff on May 6, and the next test flight of SpaceX's Starship rocket, which could happen before the end of May. Perhaps as soon as early summer, SpaceX could launch the Polaris Dawn mission with four private astronauts, who will perform the first fully commercial spacewalk in orbit. In June or July, Europe's new Ariane 6 rocket is slated to launch for the first time. Rest assured, Ars will have it all covered.
As always, we welcome reader submissions, and if you don't want to miss an issue, please subscribe using the box below (the form will not appear on AMP-enabled versions of the site). Each report will include information on small-, medium-, and heavy-lift rockets as well as a quick look ahead at the next three launches on the calendar.
German rocket arrives at Scottish spaceport. Rocket Factory Augsburg has delivered a booster for its privately developed RFA One rocket to SaxaVord Spaceport in Scotland, the company announced on X. The first stage for the RFA One rocket was installed on its launch pad at SavaVord to undergo preparations for a static fire test. The booster arrived at the Scottish launch site with five of its kerosene-fueled Helix engines. The remaining four Helix engines, for a total of nine, will be fitted to the RFA One booster at SaxaVord, the company said.
FDA Qualifies Apple Watch's AFib History For Use In Clinical Studies
science - Posted On:2024-05-02 23:45:00 Source: slashdot
In a first for "digital health technology," the Apple Watch's atrial fibrillation (AFib) history feature has been approved by the FDA to join the FDA's Medical Device Development Tools (MDDT) program. This means the wearable is now usable in clinical studies. The Verge reports: The FDA announcement describes using it as a noninvasive way to collect the data both before and after treatment: "Designed to be used as a biomarker test to help evaluate estimates of AFib burden as a secondary effectiveness endpoint within clinical studies intended to evaluate the safety and effectiveness of cardiac ablation devices to treat." Read more of this story at Slashdot.
Pet Parrots Prefer Live Video-Calls Over Watching Pre-Recorded Videos
science - Posted On:2024-05-02 19:30:00 Source: slashdot
When given the choice, pet parrots prefer to video-call each other instead of watch pre-recorded videos of other birds. Those are the findings from a new paper (PDF) set to appear next week at a conference on Human Factors in Computing Systems in Hawaii. Phys.Org reports: The study, led by animal-computer interaction specialists at the University of Glasgow, gave tablet devices to nine parrots and their owners to explore the potential of the video chats to expand the birds' social lives. Their results suggest that the clever birds, who often suffer from loneliness in captivity, may be able to tell the difference between live and pre-recorded content on digital devices, and strongly prefer interacting with other birds in real time. Over the course of the six-month study, the parrots chose to initiate calls to other birds significantly more often than they opted to watch pre-recorded footage. They also seemed more engaged in the live chats, spending much longer on calls with other birds than they did watching videos from a library of options. The findings could help steer the future course of the emerging "animal internet," which uses digital technology to empower animals to interact with humans and each other in new ways. Read more of this story at Slashdot.
Nurses Say Hospital Adoption of Half-Cooked 'AI' Is Reckless
science - Posted On:2024-05-02 18:15:00 Source: slashdot
An anonymous reader quotes a report from Techdirt: Last week, hundreds of nurses protested the implementation of sloppy AI into hospital systems in front of Kaiser Permanente. Their primary concern: that systems incapable of empathy are being integrated into an already dysfunctional sector without much thought toward patient care: "No computer, no AI can replace a human touch," said Amy Grewal, a registered nurse. "It cannot hold your loved one's hand. You cannot teach a computer how to have empathy." There are certainly roles automation can play in easing strain on a sector full of burnout after COVID, particularly when it comes to administrative tasks. The concern, as with other industries dominated by executives with poor judgement, is that this is being used as a justification by for-profit hospital systems to cut corners further. From a National Nurses United blog post (spotted by 404 Media): "Nurses are not against scientific or technological advancement, but we will not accept algorithms replacing the expertise, experience, holistic, and hands-on approach we bring to patient care," they added. Kaiser Permanente, for its part, insists it's simply leveraging "state-of-the-art tools and technologies that support our mission of providing high-quality, affordable health care to best meet our members' and patients' needs." The company claims its "Advance Alert" AI monitoring system -- which algorithmically analyzes patient data every hour -- has the potential to save upwards of 500 lives a year. The problem is that healthcare giants' primary obligation no longer appears to reside with patients, but with their financial results. And, that's even true in non-profit healthcare providers. That is seen in the form of cut corners, worse service, and an assault on already over-taxed labor via lower pay and higher workload (curiously, it never seems to impact outsized high-level executive compensation). Read more of this story at Slashdot.
Maya used hallucinogenic plants in “ensouling” rituals for their ball courts
Science - Posted On:2024-05-02 12:30:01 Source: arstechnica
It's well-known that the ancient Maya had their own version of ball games, which were played with a rubber ball on stone courts. Such games served not just as athletic events but also religious ones that often involved ritual sacrifices. Archaeologists have now found evidence that the Maya may have blessed newly constructed ball courts in rituals involving plants with hallucinogenic properties, according to a new paper published in the journal PLoS ONE.
“When they erected a new building, they asked the goodwill of the gods to protect the people inhabiting it,” said co-author David Lentz of the University of Cincinnati. “Some people call it an ensouling ritual, to get a blessing from and appease the gods.” Lentz and his team previously used genetic and pollen analyses of the wild and cultivated plants found in the ancient Maya city Yaxnohcah in what is now Mexico’s Yucatan Peninsula, revealing evidence of sustainable agriculture and forestry spanning a millennia.
As we've reported previously, there is ample evidence that humans in many cultures throughout history used various hallucinogenic substances in religious ceremonies or shamanic rituals. That includes not just ancient Egypt but also ancient Greek, Vedic, Maya, Inca, and Aztec cultures. The Urarina people who live in the Peruvian Amazon Basin still use a psychoactive brew called ayahuasca in their rituals, and Westerners seeking their own brand of enlightenment have also been known to participate.
Study: The Maya blessed their ball courts in rituals with hallucinogenic plants
Science - Posted On:2024-05-02 11:45:00 Source: arstechnica
It's well-known that the ancient Maya had their own version of ball games, which were played with a rubber ball on stone courts. Such games served not just as athletic events but also religious ones that often involved ritual sacrifices. Archaeologists have now found evidence that the Maya may have blessed newly constructed ball courts in rituals involving plants with hallucinogenic properties, according to a new paper published in the journal PLoS ONE.
“When they erected a new building, they asked the goodwill of the gods to protect the people inhabiting it,” said co-author David Lentz of the University of Cincinnati. “Some people call it an ensouling ritual, to get a blessing from and appease the gods.” Lentz and his team previously used genetic and pollen analyses of the wild and cultivated plants found in the ancient Maya city Yaxnohcah in what is now Mexico’s Yucatan Peninsula, revealing evidence of sustainable agriculture and forestry spanning a millennia.
As we've reported previously, there is ample evidence that humans in many cultures throughout history used various hallucinogenic substances in religious ceremonies or shamanic rituals. That includes not just ancient Egypt but also ancient Greek, Vedic, Maya, Inca, and Aztec cultures. The Urarina people who live in the Peruvian Amazon Basin still use a psychoactive brew called ayahuasca in their rituals, and Westerners seeking their own brand of enlightenment have also been known to participate.
NASA says Artemis II report by its inspector general is unhelpful and redundant
Science - Posted On:2024-05-02 10:30:00 Source: arstechnica
NASA's acting inspector general, George A. Scott, released a report Wednesday that provided an assessment of NASA's readiness to launch the Artemis II mission next year. This is an important flight for the space agency because, while the crew of four will not land on the Moon, it will be the first time humans have flown into deep space in more than half a century.
The report did not contain any huge surprises. In recent months the biggest hurdle for the Artemis II mission has been the performance of the heat shield that protects the Orion spacecraft during its fiery reentry at more than 25,000 mph from the Moon.
Although NASA downplayed the heat shield issue in the immediate aftermath of the uncrewed Artemis I flight in late 2022, it is clear that the unexpected damage and charring during that uncrewed mission is a significant concern. As recently as last week, Amit Kshatriya, who oversees development for the Artemis missions in NASA's exploration division, said the agency is still looking for the root cause of the problem.
Storing energy with compressed air is about to have its moment of truth
Science - Posted On:2024-05-02 10:30:00 Source: arstechnica
The need for long-duration energy storage, which helps to fill the longest gaps when wind and solar are not producing enough electricity to meet demand, is as clear as ever. Several technologies could help to meet this need.
But which approaches could be viable on a commercial scale?
Toronto-based Hydrostor Inc. is one of the businesses developing long-duration energy storage that has moved beyond lab scale and is now focusing on building big things. The company makes systems that store energy underground in the form of compressed air, which can be released to produce electricity for eight hours or longer.
NASA seems unhappy to be questioned about its Artemis II readiness
Science - Posted On:2024-05-02 09:45:00 Source: arstechnica
NASA's acting inspector general, George A. Scott, released a report Wednesday that provided an assessment of NASA's readiness to launch the Artemis II mission next year. This is an important flight for the space agency because, while the crew of four will not land on the Moon, it will be the first time humans have flown into deep space in more than half a century.
The report did not contain any huge surprises. In recent months the biggest hurdle for the Artemis II mission has been the performance of the heat shield that protects the Orion spacecraft during its fiery reentry at more than 25,000 mph from the Moon.
Although NASA downplayed the heat shield issue in the immediate aftermath of the uncrewed Artemis I flight in late 2022, it is clear that the unexpected damage and charring during that uncrewed mission is a significant concern. As recently as last week, Amit Kshatriya, who oversees development for the Artemis missions in NASA's exploration division, said the agency is still looking for the root cause of the problem.