An anonymous reader quotes a report from the Guardian: We may appear to have little in common with sperm whales – enormous, ocean-dwelling animals that last shared a common ancestor with humans more than 90 million years ago. But the whales' vocalized communications are remarkably similar to our own, researchers have discovered. Not only do sperm whale have a form of "alphabet" and form vowels within their vocalizations but the structure of these vowels behaves in the same way as human speech, the new study has found.

Sperm whales communicate in a series of short clicks called codas. Analysis of these clicks shows that the whales can differentiate vowels through the short or elongated clicks or through rising or falling tones, using patterns similar to languages such as Mandarin, Latin and Slovenian. The structure of the whales' communication has "close parallels in the phonetics and phonology of human languages, suggesting independent evolution," the paper, published in the Proceedings B journal, states. Sperm whale coda vocalizations are "highly complex and represent one of the closest parallels to human phonology of any analyzed animal communication system," it added.

[...] The new study shows that "sperm whale communication isn't just about patterns of clicks -- it involves multiple interacting layers of structure," said Mauricio Cantor, a behavioral ecologist at the Marine Mammal Institute who was not involved in the research. "With this study, we're starting to see that these signals are organized in ways we didn't fully appreciate before." The latest discovery around sperm whale speech has inched forward the possibility of someday fully understanding the creatures and even communicating with them. Project CETI has set a goal of being able to comprehend 20 different vocalized expressions, relating to actions such as diving and sleeping, within the next five years. A future where we're able to fully understand what the whales are saying and be able to have a conversation with them is "totally within our grasp," said David Gruber, founder and president of Project CETI. "We've already got a lot further than I thought we could. But it will take time, and funding. At the moment we are like a two-year-old, just saying a few words. In a few years' time, maybe we will be more like a five-year-old."

An anonymous reader quotes a report from UploadVR: A group of independent researchers built a device that can artificially induce smell using ultrasound, with no consumable cartridges required. [...] The team of four are Lev Chizhov, Albert Yan-Huang, Thomas Ribeiro, Aayush Gupta. Chizhov is a neurotech entrepreneur with a background in math and physics, Yan-Huang is a researcher at Caltech with a background in computation and neural systems, and Ribeiro and Gupta are co-researchers on the project with software engineering and AI expertise.

Instead of targeting your nose at all, the device directly targets the olfactory bulb in your brain with "focused ultrasound through the skull." The researchers say that as far as they're aware, no one has ever done this before, even in animals. A challenge in targeting the olfactory bulb is that it's buried behind the top of your nose, and your nose doesn't provide a flat surface for an emitter. Ultrasound also doesn't travel well through air. The solution the researchers came up with was to place the emitter on your forehead instead, with a "solid, jello-like pad for stability and general comfort," and the ultrasound directed downward towards the olfactory bulb.

To determine the best placement, they say they used an MRI of one of their skulls to "roughly determine where the transducer would point and how the focal region (where ultrasound waves actually concentrate) aligned with the olfactory bulb (the target for stimulation)". [...] According to the researchers, they were able to induce the sensation of fresh air "with a lot of oxygen", the smell of garbage "like few-day-old fruit peels," an ozone-like sensation "like you're next to an air ionizer," and a campfire smell of burning wood. While technically head-mounted, the current device does require being held up with two hands. But as with all such prototypes, it likely could be significantly miniaturized.

An anonymous reader quotes a report from the New York Times: Many scientists have contended that humans have evolved very little over the past 10,000 years. A few hundred generations was just a blink of the evolutionary eye, it seemed. Besides, our cultural evolution -- our technology, agriculture and the rest -- must have overwhelmed our biological evolution by now. A vast study, published on Wednesday in the journal Nature, suggests the opposite. Examining DNA from 15,836 ancient human remains, scientists found 479 genetic variants that appeared to have been favored by natural selection in just the past 10,000 years.

The researchers also concluded that thousands of additional genetic variants have probably experienced natural selection. Before the new study, scientists had identified only a few dozen variants. "There are so many of them that it's hard to wrap one's mind around them," said David Reich, a geneticist at Harvard Medical School and an author of the new study. He and his colleagues found that a mutation that is a major risk factor for celiac disease, for example, appeared just 4,000 years ago, meaning the condition may be younger than the Egyptian pyramids. The mutation became ever more common. Today, an estimated 80 million people worldwide have celiac disease, in which the immune system attacks gluten and damages the intestines.

The steady rise of the mutation came about through natural selection, the scientists argue. For some reason, people with the mutation had more descendants than people without it -- even though it put them at risk of an autoimmune disorder. Other findings are even more puzzling. The researchers found that genetic variants that raise the odds of a smoking habit have been getting steadily rarer in Europe for the past 10,000 years. Something is working against those variants -- but it can't be the harm from smoking. Europeans have been smoking tobacco for only about 460 years. The scientists can't see from their research so far what forces might be making these variants more or less common. "My short answer is, I don't know," said Ali Akbari, a senior staff scientist at Harvard and an author of the study. The researchers also found that some variants, like the one linked to Type B blood, became much more common in Europe around 6,000 years ago, while others changed direction over time. For example, a TYK2 immune gene variant that may have once been beneficial later became harmful because it increased tuberculosis risk.

The study also found signs of natural selection in 44 out of 563 traits. Variants linked to Type 2 diabetes, wider waists, and higher body fat have become less common, possibly because farming and carbohydrate-heavy diets made once-useful fat-storing traits more harmful. Other findings, such as selection favoring genes linked to more years of schooling, are harder to interpret.

A 63-year-old man in Norway appears to be cured of HIV after receiving a stem cell transplant from his brother, who turned out to have a rare mutation that makes immune cells resistant to HIV. "Four years after the transplant, and two years after the man stopped antiretroviral therapy, he still appears to be free of the infection," reports Gizmodo. From the report: According to the report, the man was first diagnosed with myelodysplastic syndrome, a type of cancer that weakens blood cell production from bone marrow, in 2018. Though he seemed to initially respond to treatment, the cancer returned after two years, and doctors decided to perform a stem cell transplant. Because the man also had HIV (diagnosed in 2006), the doctors were hoping to treat both conditions at once, though they knew their chances were low. Most of these cases have involved the use of stem cells taken from people with two copies of a particular mutation in their CCR5 gene, which regulates the CC5R receptor on white blood cells. This mutation, named CCR5-delta 32, makes immune cells naturally resistant to infection from strains of HIV-1 (the most common type of the virus). However, only about 1% of the population carries two copies of the mutation.

After initial screening failed to find someone who both possessed the mutation and had compatible bone marrow, the doctors decided to move ahead with the man's brother, who was already known to have compatible bone marrow. But to everyone's surprise, testing on the day of the transplant showed that the brother also had the mutation. Though the man did experience some complications from the procedure, his body successfully started to produce new blood cells with the mutation. The doctors decided to take him off antiretroviral medication two years after the transplant. And in the two years since then, regular follow-up tests have failed to show any signs of the virus in his system. [...] According to AFP, there have only been roughly 10 cases worldwide involving an HIV cure through stem cell transplantation. This is the first to involve a family donor.

Researchers at the University of Southern California say they've developed a memristor memory device that continued operating at 700 degrees Celsius. "And crucially, 700 degrees was not the limit, it was simply as hot as their testing equipment could go," adds ScienceAlert. "The device showed no signs of failing." From the report: The device is called a memristor and it's a nanoscale component that can both store information and perform computing operations. Think of it as a tiny sandwich with two electrode layers on the outside and a thin ceramic filling in the middle. The team built theirs from tungsten, the metal with the highest melting point of any element, combined with a ceramic called hafnium oxide, and with a layer of graphene at the bottom. Each material can withstand enormous heat. Together, they turned out to be extraordinary.

What makes graphene the key ingredient is the way it interacts with tungsten at the atomic level. In a conventional device, heat causes metal atoms to drift slowly through the ceramic layer until they bridge the two electrodes, short circuiting everything and leaving the device permanently broken. Graphene stops that process dead. Its surface chemistry with tungsten is ... almost like oil and water. Tungsten atoms that drift toward the graphene find they simply cannot take hold, no anchor, no short circuit, no failure. The team used advanced electron microscopy and quantum level computer simulations to understand exactly why, turning a single lucky result into a repeatable principle. The findings have been published in the journal Science.

The biotech industry's engineered cells could become an $8 trillion market by 2035, notes Phys.org. But how do you keep them from being stolen? Their article notes "an uptick in the theft and smuggling of high-value biological materials, including specially engineered cells." In Science Advances, a team of U.S. researchers present a new approach to genetically securing precious biological material. They created a genetic combination lock in which the locking or encryption process scrambled the DNA of a cell so that its important instructions were non-functional and couldn't be easily read or used. The unlocking, or decryption, process involves adding a series of chemicals in a precise order over time — like entering a password — to activate recombinases, which then unscramble the DNA to their original, functional form...

They created a biological keypad with nine distinct chemicals, each acting as a one-digit input. By using the same chemicals in pairs to form two-digit inputs, where two chemicals must be present simultaneously to activate a sensor, they expanded the keypad to 45 possible chemical inputs without introducing any new chemicals. They also added safety penalties — if someone tampers with the system, toxins are released — making it extremely unlikely for an unauthorized person to access the cells.
"The researchers conducted an ethical hacking exercise on the test lock and found that random guessing yielded a 0.2% success rate, remarkably close to the theoretical target of 0.1%."

"Breathable oxygen has been created from Moon dust," reports the Telegraph, "in a world first that paves the way for a lunar base."

Jeff Bezos's Blue Origin ""announced this week that it had developed a reactor that could successfully release oxygen from lunar soil by using an electric current." Almost half of Moon dust — the thin layer of rock that blankets the lunar surface — is oxygen, but it is bound to metals such as iron and titanium... Previous work to isolate oxygen has been lab-based, and the unwieldy equipment needed has been too difficult to send to the Moon. In contrast, Blue Origin said its small-scale reactor, named Air Pioneer, could be made flight-ready to "provide the first breath of life for a sustainable Moon base"... As well as breathable air, Blue Origin said the reactor produces other critical elements for planetary infrastructure, such as iron, aluminium and silicon for construction and electronics, as well as glass for windows and solar panel covers. The company has previously said it wants to turn the Moon, and eventually Mars, into "self-sustaining worlds where robots and humans can go beyond visiting and truly explore, grow, live, and thrive"....

Blue Origin said it would need to generate around one megawatt of power to drive the reactors — about the energy it would require to power around 400 to 1,000 homes simultaneously. It envisages that each lunar settlement would have an array of nearby solar panels, generating the power needed for one reactor.
Besides breathable air for astronauts, the oxygen could also be used in propellant for refuelling landers and fuel cells, Blue Origin points out — and "produced right where they're needed, and at much lower cost than being brought from Earth."

Thanks to Slashdot reader fjo3 for sharing the article.

Critics say social media is engineered to be as addictive as tobacco or gambling, writes the Washington Post — while adding that "the science has been moving in parallel with the court's recognition." A growing body of research links heavy social media use not only to declines in mental health but to measurable cognitive effects — on attention, memory and focus — that in some studies resemble accelerated aging. Science also suggests we have more control than we realize when it comes to reversing this damage, and the solution is surprisingly simple: Take a break... "Digital detoxes" can sound like a fad. But in one of the largest studies to date, published in PNAS Nexus and involving more than 467 participants with an average age of 32, even a short time away produced striking results — effectively erasing a decade of age-related cognitive decline.

For 14 days, participants used a commercially available app, Freedom, to block internet access on their phones. They were still allowed calls and text messages, essentially turning a smartphone into a dumb phone. Their time online decreased from 314 minutes to 161 minutes, and by the end of the period the participants had improvements in sustained attention, mental health as well as self-reported well-being. The improvement in sustained attention was about the same magnitude as 10 years of age-related decline, the researchers noted, and the effect of the intervention on depression symptoms was larger than antidepressants and similar to that of cognitive behavioral therapy.

But two things were even more mind-blowing... Even those people who cheated and broke the rules after a few days seemed to have positive effects from the break; and in follow-up reports after the two weeks, many people reported the positive effects lingered. "So you don't have to necessarily restrict yourself forever. Even taking a partial digital detox, even for a few days, seems to work," Kushlev said.
The article also notes a November study at Harvard published in JAMA Network Open where nearly 400 people 'found that even a short break can make a measurable difference: After just one week of reduced smartphone use, participants reported drops in anxiety (16.1 percent), depression (24.8 percent) and insomnia (14.5 percent)..."

"Other experiments point in the same direction — whether decreasing social media use by an hour a day for one week or stepping away from just Facebook and Instagram."

NASA's Artemis II crew safely splashed down off the California coast after completing a 10-day trip around the moon and back. "This is not just an accomplishment for NASA," sad NASA Administrator Jared Isaacman. "This is an accomplishment for humanity, again, a historic mission to the moon and back." From a report: Isaacman is aboard the USS John. P Murtha Navy recovery vessel, where the astronauts will be brought once they've been retrieved from the Orion capsule, and he shared "there is a lot to celebrate right now on on a mission well accomplished for Artemis II."

Isaacman also complimented the crew as "absolutely professional astronauts, wonderful communicators and almost poets" "" as well as "ambassadors from humanity to the stars." "I can't imagine a better crew than the Artemis II crew that just completed a perfect mission right now. We are back in the business of sending astronauts to the moon and bringing them back safely.

This is just the beginning. We are going to get back into doing this with frequency, sending missions to the moon until we land on it in 2028 and start building our base." Isaacman also said it's time to start preparing for Artemis III, expected to launch in 2027. You can watch the moment of the splashdown here.

Researchers say the world's largest known wild chimpanzee community in Uganda fractured into rival factions and has been locked in a vicious "civil war" for the last eight years. "It is not clear exactly why the once close-knit community of Ngogo chimpanzees at Uganda's Kibale National Park are at loggerheads, but since 2018 the scientists have recorded 24 killings, including 17 infants," reports the BBC. From the report: [O]ver several decades, [lead author Aaron Sandel] said the nearly 200 Ngogo chimpanzees had lived in harmony. There were divided into two sets - known to researchers as Western and Central - but they had existed overall as a cohesive group. Sandel said he first noticed them polarizing in June 2015, when the Western chimpanzees ran away and were chased by the Central group. "Chimpanzees are sort of melodramatic," he said, explaining that following arguments there would ordinarily be "screaming and chasing" and then later, they would grooming and co-operating.

But following the 2015 dispute, the researchers saw that there was a six-week avoidance period between the two sets, with interactions becoming more infrequent. When they did occur, Sandel said they were "a little more intense, a little more aggressive." Following the emergence of the two distinct groups in 2018, members of the Western group started attacking the Central chimpanzees. In 24 targeted attacks since the split, at least seven adult males and 17 infants from the Central chimps have been killed, the study found, although the researchers believe the actual number of deaths are higher. The researchers believe many factors such as the group size and subsequent competition of resources, and "male-male competition" for reproducing may be to blame.

But they say there were three likely catalysts:
- The first, were the deaths of five adult males and one adult female -- for reasons unknown -- in 2014, which could have disrupted social networks and weakened social ties across the subgroups
- The following year, there was a change in the alpha male, which the study says coincided with the first period of separation between the Western and Central groups. "Changes in the dominance hierarchy can increase aggression and avoidance in chimpanzees," it explained
- The third factor was the deaths of 25 chimpanzees, including four adult males and 10 adult females, as a result of a respiratory epidemic, in 2017, a year before the final separation. One of the adult males who died was "among the last individuals to connect the groups," the research paper said. The study has been published in the journal Science.

Longtime Slashdot reader fahrbot-bot shares a report from NewScientist: According to quantum chromodynamics (QCD) -- widely considered to be our best theory for describing the strong force, which binds quarks inside protons and neutrons -- even a perfect vacuum isn't truly empty. Instead, it is filled with short-lived disturbances in the underlying energy of space that flicker in and out of existence, known as virtual particles. Among them are quark-antiquark pairs. Under normal conditions, these fleeting pairs vanish almost as soon as they appear. But if enough energy is injected into a vacuum, QCD predicts they can be promoted into real, detectable particles with measurable mass. Now, the STAR collaboration -- an international team of physicists working at the Relativistic Heavy Ion Collider in Brookhaven National Laboratory in New York state -- has observed this process for the first time.

The team smashed together high-energy protons in a vacuum, producing a spray of particles. Some of these particles should be quark-antiquark pairs pulled directly from the vacuum itself, but quarks can never exist alone and immediately combine into composite particles. Quarks and antiquarks are born with their spins correlated -- a shared quantum alignment inherited from the vacuum. The researchers found that this link persists even after the quarks and antiquarks become part of larger particles called hyperons, which decay in less than a tenth of a billionth of a second. Spotting these spin-aligned hyperons in the aftermath of the proton collisions allowed the researchers to confirm that the quarks within them came from the vacuum. The findings have been published in the journal Nature.

Artemis II has broken the Apollo 13 record for the farthest distance humans have ever traveled from Earth. NASA reports: The Artemis II crew of NASA astronauts Reid Wiseman, Victor Glover, and Christina Koch, along with CSA (Canadian Space Agency) astronaut Jeremy Hansen have set the record for the farthest distance from Earth traveled by a human mission, surpassing the Apollo 13 record of 248,655 miles set in 1970.

NASA Flight Director Brandon Lloyd, Capsule Communicator Amy Dill, and Command and Handling Data Officer Brandon Borter also marked a lighthearted milestone today by emailing the crew what is now assumed to be the longest person-to-person message ever sent in human history. After breaking the record for human spaceflight, crew also took a moment to provisionally name a couple of craters on the Moon, noting they were able to see them with their naked eye.

Just northwest of Orientale basin highlighted above is a crater they would like to name Integrity after their spacecraft and this historic mission. Just northeast of Integrity, on the near and far side boundary, and sometimes visible from Earth, the crew suggested Carroll crater in honor of Reid Wiseman's late wife, Carroll Taylor Wiseman. After this mission is complete, the crater name proposals will be formally submitted to the International Astronomical Union, the organization that governs the naming of celestial bodies and their surface features. On April 1, NASA successfully launched humanity's first crewed trip around the Moon in more than 50 years. A couple of days into the mission, attention turned to a more mundane problem when reports said the astronauts had access to "two Microsoft Outlooks" and neither was working properly. By April 4, the crew had passed 100,000 miles from Earth as they continued deeper into space, and by April 6, they had entered the Moon's gravitational pull and caught their first views of the lunar far side.

NASA's Artemis astronauts are now entering "the lunar sphere of influence," reports NBC News, "meaning the pull of the moon's gravity will become stronger than Earth's." Now as they begin their swing around the moon, the Artemis astronauts "are chasing after Apollo 13's maximum range from Earth," reports the Associated Press, hoping to beat its distance from Earth by more than 4,100 miles (6,600 kilometers).

They'll begin their six-hour lunar flyby 14 hours from now (at 2:45 p.m. ET Monday). But in a space-to-earth interview Saturday with NBC News, the astronauts were already describing their first glimpses of the edge of the far side: [NASA astronaut Christina Koch realized] it looked different from what she was accustomed to on Earth. "The darker parts just aren't quite in the right place," she said. "And something about you senses that is not the moon that I'm used to seeing...."

[Astronaut Reid] Wiseman called the flight a "magnificent accomplishment" and said the astronauts' ability to gaze at both Earth and the moon from their spacecraft has been "truly awe-inspiring." "The Earth is almost in full eclipse. The moon is almost in full daylight, and the only way you could get that view is to be halfway between the two entities," he said... And while the early photos of Earth and the moon that [Canadian astronaut Jeremy] Hansen and his colleagues have beamed back have been spectacular, the Canadian astronaut said they pale in comparison to the real deal outside their capsule's windows. "I know those photos are amazing," he said, "but let me assure you, it is another level of amazing up here."
And their upcoming six-hour lunar flyby "promises views of the moon's far side that were too dark or too difficult to see by the 24 Apollo astronauts who preceded them," notes the Associated Press: A total solar eclipse also awaits them as the moon blocks the sun, exposing snippets of shimmering corona.... At closest approach, they will come within 4,070 miles (6,550 kilometers) of the moon. Because they launched on April 1, the rendezvous won't have as much of the far lunar side illuminated as other dates would have. But the crew still will be able make out "definite chunks of the far side that have never been seen" by humans, said NASA geologist Kelsey Young, including a good portion of Orientale Basin.

They'll call down their observations as they photograph the gray, pockmarked scenes. There's a suite of professional-quality cameras on board, and each astronaut also has an iPhone for more informal, spur-of-the-minute picture-taking... Orion will be out of contact with Mission Control for nearly an hour when it's behind the moon. The same thing happened during the Apollo moonshots. NASA is relying on its Deep Space Network to communicate with the crew, but the giant antennas in California, Spain and Australia won't have a direct line of sight when Orion disappears behind the moon for approximately 40 minutes...

Once Artemis II departs the lunar neighborhood, it will take four days to return home. The capsule will aim for a splashdown in the Pacific near San Diego on April 10, nine days after its Florida launch. During the flight back, the astronauts will link up via radio with the crew of the orbiting International Space Station. This is the first time that a moon crew has colleagues in space at the same time and NASA can't pass up the opportunity for a cosmic chitchat.

Plants, toads, and mushrooms "can all produce psychedelic substances," writes ScienceAlert.

"And now their powers have been combined in one plant." [S]cientists have taken the genes these organisms use to make five natural psychedelics and introduced them into a tobacco plant ( Nicotiana benthamiana), which then produced all five compounds simultaneously. As interest grows in psychedelics as potential treatments for illnesses such as depression, anxiety, and PTSD, the newly developed system could offer scientists a new way to produce these compounds for research purposes...

[P]rogress in this field remains limited, in part due to regulatory restrictions, underscoring the need for more research. This creates practical challenges for scientists. "Traditionally, the supply of psychedelics relies on natural producers, mainly plants, fungi, and the Sonoran Desert toad," the researchers write. "Harvesting these organisms for their psychoactive compounds raises ecological and ethical concerns, being increasingly threatened by habitat loss and overexploitation..."

[T]he team carefully monitored the plant's production of five psychedelic tryptamines: DMT originally from plants; psilocin and psilocybin from mushrooms; and bufotenin and 5-MeO-DMT from toads. The modified tobacco plants were found to produce all five compounds simultaneously.
The article points out that the researchers "also took it a step further." By tweaking the enzymes they were able to "produce modified versions of the compounds that do not naturally occur in plants, and which may also have therapeutic value."

An anonymous reader quotes a report from Ars Technica: When it comes to large language model-powered tools, there are generally two broad categories of users. On one side are those who treat AI as a powerful but sometimes faulty service that needs careful human oversight and review to detect reasoning or factual flaws in responses. On the other side are those who routinely outsource their critical thinking to what they see as an all-knowing machine. Recent research goes a long way to forming a new psychological framework for that second group, which regularly engages in "cognitive surrender" to AI's seemingly authoritative answers. That research also provides some experimental examination of when and why people are willing to outsource their critical thinking to AI, and how factors like time pressure and external incentives can affect that decision.

Overall, across 1,372 participants and over 9,500 individual trials, the researchers found subjects were willing to accept faulty AI reasoning a whopping 73.2 percent of the time, while only overruling it 19.7 percent of the time. The researchers say this "demonstrate[s] that people readily incorporate AI-generated outputs into their decision-making processes, often with minimal friction or skepticism." In general, "fluent, confident outputs [are treated] as epistemically authoritative, lowering the threshold for scrutiny and attenuating the meta-cognitive signals that would ordinarily route a response to deliberation," they write. These kinds of effects weren't uniform across all test subjects, though. Those who scored highly on separate measures of so-called fluid IQ were less likely to rely on the AI for help and were more likely to overrule a faulty AI when it was consulted. Those predisposed to see AI as authoritative in a survey, on the other hand, were much more likely to be led astray by faulty AI-provided answers.

Despite the results, though, the researchers point out that "cognitive surrender is not inherently irrational." While relying on an LLM that's wrong half the time (as in these experiments) has obvious downsides, a "statistically superior system" could plausibly give better-than-human results in domains such as "probabilistic settings, risk assessment, or extensive data," the researchers suggest. "As reliance increases, performance tracks AI quality," the researchers write, "rising when accurate and falling when faulty, illustrating the promises of superintelligence and exposing a structural vulnerability of cognitive surrender." In other words, letting an AI do your reasoning means your reasoning is only ever going to be as good as that AI system. As always, let the prompter beware.