An anonymous reader quotes a report from Wired: Florida's ban on cultivated meat is being challenged in federal court in a lawsuit that was filed yesterday. The case is being brought by the cultivated meat firm Upside Foods and the Institute of Justice (IJ), a nonprofit public interest law firm. Florida governor Ron DeSantis signed the legislation making the sale of cultivated meat illegal in Florida on May 1, and the bill came into effect on July 1. Alabama passed a similar bill banning cultivated meat that will come into effect from October 1. The case brought by Upside Foods and the IJ argues that Florida's ban is unconstitutional in three different ways. First, they argue, the ban violates theSupremacy Clause that gives federal law priority over state law in certain instances. The court case argues that the Florida ban violates two different provisions in the Federal Meat Inspection Act and Poultry Products Inspection Act.

The legal complaint (PDF) also alleges that the ban violates theCommerce Clause, which gives the US Congress exclusive power to regulate interstate commerce. The IJ argues that the Commerce Clause restricts states from enacting laws that unduly restrict interstate commerce, and that Florida's ban in its current form has the effect of discriminating against it. "Florida's law has nothing to do with protecting health and safety," said IJ senior attorney Paul Sherman in a press conference today. "It is a transparent example of economic protectionism." Sherman said that Upside Foods and the IJ would also apply for a preliminary injunction that would allow the company to sell cultivated meat in Florida while the legal challenge is still ongoing. The complaint says that Upside had planned to distribute its cultivated chicken at Art Basel in Miami in early December 2024. The company protested the Florida ban by holding a tasting of its chicken on June 27 in Miami, shortly before the ban came into effect. Sherman said that the Alabama ban was also "in our sights" but that the IJ had targeted the Florida law as it came into effect before the Alabama ban. "We're hoping we'll be able to get a quick ruling [in Florida] on a preliminary injunction there," and use that as a precedent to challenge the Alabama ban, he said. "Consumers should decide what kind of meat they want to buy and feed their families -- not politicians," said the Good Food Institute (GFI), a nonprofit focused on advancing alternative proteins and which is serving as a consulting consul in this case. "This lawsuit seeks to protect these consumer rights, along with the rights of companies to compete in a fair and open marketplace."

An anonymous reader quotes a report from The Guardian: The World Health Organization (WHO) is poised to scrap controversial drinking water guidelines proposed for two toxic PFAS "forever chemicals." The move follows allegations that the process of developing the figures was corrupted by industry-linked researchers aiming to undercut strict new US PFAS limits and weaken standards in the developing world. Many independent scientists charged that the proposed WHO drinking water guidelines for perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) were weak, did not fully protect human health, ignored credible research, and were far above limits set by regulators in the US and EU. The guidelines would have allowed far more PFAS in drinking water than what is allowed by the US Environmental Protection Agency.

Though the earlier guidelines were drafts, and proposed rules all go through a revision process, the WHO is conducting an entirely new review of scientific literature and disbanded the panel of scientists who developed the draft guidelines. It established a new panel with fewer industry-linked scientists and more regulatory officials, moves that have not happened in other revisions, said Betsy Southerland, a former EPA manager in the agency's water division. "This is unprecedented, but the WHO got unprecedented criticism," Southerland said. The WHO told the Guardian in a statement that the moves are part of "an ongoing process" and will include guidelines for other PFAS compounds.

Scientists critical of the limits charged that the WHO ignored high-quality research to create a sense of doubt about the science around PFAS. EPA and EU regulators carried out an exhaustive literature review to find all human and animal studies, and used the best of those papers to establish their limits, Southerland said. The WHO, however, ignored all human studies and determined most animal studies were "too flawed" to use, Southerland said. The organization concluded there was not enough research to set health-based guidelines, which she called a "shocking decision." "There is far more health data for these chemicals than has ever been available for any pollutant in the history of the WHO," Southerland said. Instead, the WHO largely based its guidelines on its review of technological research, but ignored most of those studies as well, Southerland said. The body concluded filtration systems could reliably remove PFOA and PFOS at 100ppt, even though US water utilities remove it below four ppt. The decisions bear industry's prints, researchers say.

An anonymous reader quotes a report from Ars Technica: SpaceX will fly the first-ever human spaceflight over the Earth's poles, possibly before the end of this year, the company announced Monday. The private Crew Dragon mission will be led by a Chinese-born cryptocurrency entrepreneur named Chun Wang, and he will be joined by a polar explorer, a roboticist, and a filmmaker whom he has befriended in recent years. The "Fram2" mission, named after the Norwegian research ship Fram, will launch into a polar corridor from SpaceX's launch facilities in Florida and fly directly over the north and south poles. The three-to-five day mission is being timed to fly over Antarctica near the summer solstice in the Southern Hemisphere, to afford maximum lighting.

The four-person crew will fly, fittingly, aboard Crew Dragon Endurance, which is named after Ernest Shackleton's famous ship that was trapped in the Antarctic ice and eventually sunk there about a century ago. The spacecraft will be fitted with a cupola for both photography and filming. This will be SpaceX's third free-flying mission aboard Crew Dragon, following the Inspiration4 mission funded and commanded by US entrepreneur Jared Isaacman in 2021, and his forthcoming Polaris Dawn mission which may launch later this month. In an interview, Wang said he modeled the Fram2 mission's crew and public outreach programs on the template established by Isaacman.

Researchers from Nottingham Trent University found that horses are more intelligent than previously believed, as they quickly adapted to a treat-based game with changing rules, demonstrating strategic behavior when a penalty was introduced. The BBC reports: The study involved 20 horses, who first were rewarded with a treat for touching a piece of card with their nose. In the second stage, a "stop light" was introduced, and the rule was changed so that the reward was only given if they touched the card while the light was off. This did not alter the behaviour of the horses, as they were observed touching the card regardless of the status of the light. That is, until the rules changed for a third time.

In the final stage, researchers introduced a penalty of a 10-second timeout for touching the card while the stop light was on. The team observed a rapid adjustment to the horses' behaviour now there was a cost to getting it wrong, all of them quickly learning to play by the rules to avoid the timeout, researchers said. The researchers believe the fact the horses adapted so quickly indicates they understood the rule of the stop light the entire time, but had no reason to follow the rule when there was no consequence for getting it wrong. The study has been published in the journal Applied Animal Behavior Science.

sciencehabit shares a report from Science.org: For years, astronomers thought it was the Milky Way's destiny to collide with its near neighbor the Andromeda galaxy a few billion years from now. But a new simulation finds a 50% chance the impending crunch will end up a near-miss, at least for the next 10 billion years. It's been known that Andromeda is heading toward our home Galaxy since 1912, heading pretty much straight at the Milky Way at a speed of 110 kilometers per second. Such galaxy mergers, which can be seen in progress elsewhere in the universe, are spectacularly messy affairs. Although most stars survive unscathed, the galaxies' spiral structures are obliterated, sending streams of stars spinning off into space. After billions of years, the merged galaxies typically settle into a single elliptical galaxy: a giant featureless blob of stars. A study from 2008 suggested a Milky Way-Andromeda merger was inevitable within the next 5 billion years, and that in the process the Sun and Earth would get gravitationally grabbed by Andromeda for a time before ending up in the distant outer suburbs of the resulting elliptical, which the researchers dub "Milkomeda."

In the new simulation, researchers made use of the most recent and best estimates of the motion and mass of the four largest galaxies in the Local Group. They then plugged those into simulations developed by the Institute for Computational Cosmology at Durham University. First, they ran the simulation including just the Milky Way and Andromeda and found that they merged in slightly less than half of the cases -- lower odds than other recent estimates. When they included the effect of the Triangulum galaxy, the Local Group's third largest, the merger probability increased to about two-thirds. But with the inclusion of the Large Magellanic Cloud, a satellite galaxy of the Milky Way that is the fourth largest in the Local Group, those chances dropped back down to a coin flip. And if the cosmic smashup does happen, it won't be for about 8 billion years. "As it stands, proclamations of the impending demise of our Galaxy appear greatly exaggerated," the researchers write. Meanwhile, if the accelerating expansion of the universe continues unabated, all other galaxies will disappear beyond our cosmic event horizon, leaving Milkomeda as the sole occupant of the visible universe. The study is available as a preprint on arXiv.

Slashdot contributors Tablizer, radaos, fjo3, and dbialac highlighted a major discovery by scientists: a reservoir of liquid water hidden deep beneath Mars' rocky outer crust. The BBC reports: The findings come from a new analysis of data from Nasa's Mars Insight Lander, which touched down on the planet back in 2018. The lander carried a seismometer, which recorded four years' of vibrations -- Mars quakes -- from deep inside the Red Planet. Analyzing those quakes -- and exactly how the planet moves -- revealed "seismic signals" of liquid water... The Insight probe was only able to record directly from the crust beneath its feet, but the researchers expect that there will be similar reservoirs across the planet. If that is the case, they estimate that there is enough liquid water on Mars to form a layer across the surface that would be more than half a mile deep.

However, they point out, the location of this Martian groundwater is not good news for billionaires with Mars colonization plans who might want to tap into it. "It's sequestered 10-20km deep in the crust," explained Prof Manga. "Drilling a hole 10km deep on Mars -- even for [Elon] Musk -- would be difficult," he told BBC News.

"Battling choppy waves and high winds, three engineers pulled ashore a yellow submarine in Scotland this week," reports the BBC. "With sheets of water pouring from its body, the UK's most famous robot — Boaty McBoatface — was winched up after 55 days at sea." Boaty has completed a more-than-2,000km scientific odyssey from Iceland [the longest journey yet for its class of submarine, and major test of its engineering]... "Boaty has absolutely passed. It's a massive relief," says Rob Templeton [from Southampton's National Oceanography Centre]... It is exciting technology but the science that Boaty was doing could be part of a game-changer in how scientists understand climate change...

Cruising at 1.1metres per second and diving thousands of metres, Boaty had more than 20 sensors monitoring biological and chemical conditions like nutrients, oxygen levels, photosynthesis and temperature... "We are measuring what's been happening in the upper ocean with the phytoplankton, the plants that grow there. We are looking at the little zooplankton, the animals that eat them. And we've been measuring the fecal pellets, the poo that the animals produce," explained Dr Stephanie Henson [chief scientist on the research project "BioCarbon" run by the National Oceanography Centre, the University of Southampton and Heriot-Watt University in Edinburgh.] "Our climate would be significantly warmer if the carbon pump wasn't there," Stephanie said. Without it, atmospheric carbon dioxide levels would be about 50% higher, she says. But current climate modelling does not get the carbon pump right, she says. "We want to know how strong it is, what changes its strength. Does it change from season to season, and year to year?" she says...

There are tentative signs from the research that the carbon pump might be slowing down, the scientists explain. The team recorded much smaller "blooms" of the tiny plants and animals that feed on them than they expected in spring. "If that trend were to continue in future years it would mean the biological (carbon) pump could be weakening which could result in more carbon dioxide being left in the atmosphere," Stephanie said.
It's really nice to see photos of the yellow submarine coming ashore after 55 days underwater, "on its way home to Southampton."

But according to the article, Dr Adrian Martin (running the BioCarbon project) "explains the research aims to better understand how the oceans are storing carbon because of a controversial field of study called geoengineering." Some scientists and entrepreneurs believe we can artificially change the ocean, for example by altering its chemistry, in the hope it would absorb more carbon. But these are still very experimental and have lots of critics. Opponents worry geoengineering will do unexpected harm or not address climate change quickly enough. "If you're going to make interventions that could be global disturbances of the ocean ecosystem, you need to understand the consequences. Without that, you are not informed to make that decision," he says.

The Wall Street Journal visits scientists at Harvard University's Wyss Institute for Biologically Inspired Engineering who are researching a "sugar-to-fiber" enzyme (normally used by plants to create stalks). They're testing a version they've "encased in spherical nanoparticles — tiny mesh-like cages made of pectin that allow the enzyme to be added to food without being activated until it reaches the intestine.

"Once there, a change in pH causes the cage to expand, freeing the enzyme to float through its holes and start converting sugar to fiber." The Wyss Institute's goal for its enzyme product was to reduce the sugar absorbed from food by 30%, though it has the potential to remove even more than that, says Sam Inverso, director of business development partnerships at the Wyss Institute. The enzyme's ability to turn sugar into fiber is also key, as most Americans don't get nearly enough fiber in their diet, says Adama Sesay, a senior engineer at the Wyss Institute who worked on the project...

The Wyss Institute is now licensing the technology to a company to help bring its enzyme product to market, a process that entails additional testing and work to secure regulatory approval. Inverso says that the aim is for the product to be available to U.S. food manufacturers within the next two years, and that other encapsulated enzymes could follow: products that reduce lactose absorption after drinking milk, or cut gluten after eating bread. For now the enzyme works better in solid food than in a liquid. Producing it in large quantities and at low cost is still a ways off — currently it's 100 times more expensive than raw sugar, Inverso says.
And the Journal notes they're not the only ones working on the problem: San Francisco-based startup Biolumen recently launched a product called Monch Monch, a drink mix made of fibrous, microscopic sponges designed to soak up sugar and prevent it from reaching the bloodstream. At mealtime consumers can blend a teaspoon of Monch Monch, which has no taste, smell or color, into drinks from water to wine. Once it has reached the stomach, the sponges start to swell and sequester sugar, reducing its burden on the body, says Dr. Robert Lustig, Biolumen's co-founder and chief medical officer... One gram of Monch Monch can sequester six grams of sugar, says Lustig... The product, introduced as a dietary supplement, can also be used as a food ingredient under a Food and Drug Administration principle known as "generally recognized as safe." Packets of Monch Monch are available for purchase online, and Biolumen says it is in talks with U.S. food manufacturers it declined to name about its use in other products...

Food companies are betting on other solutions for now. Cereal startup Magic Spoon uses allulose, a natural sugar found in figs and raisins that is growing in popularity, helped by FDA guidance that allows it to be excluded from sugar or added-sugar totals on nutrition labels. Ingredient company Tate & Lyle, which makes allulose from corn kernels, says the sweetener tastes like sugar and adds bulk and caramel color, but passes through the body without being metabolized... Chicago-based Blommer Chocolate recently launched a line of reduced-sugar chocolate and confectionery products made with Incredo, a sugar that has been physically altered to taste sweeter using a mineral carrier that dissolves faster in saliva and targets the sweet-taste receptors on the tongue. Incredo's use enables manufacturers to use up to 50% less sugar, the company says.
The article even notes that "researchers still working to reduce sugar are peddling new technologies, like individual sugar crystals modified to dissolve more quickly in the mouth, making food taste sweeter."

"AT&T has been told to stop running ads that claim the carrier is already offering cellular coverage from space," reports Ars Technica: AT&T intends to offer Supplemental Coverage from Space (SCS) and has a deal with AST SpaceMobile, a Starlink competitor that plans a smartphone service from low-Earth-orbit satellites. But AST SpaceMobile's first batch of five satellites isn't scheduled to launch until September.

T-Mobile was annoyed by AT&T running an ad indicating that its satellite-to-cellular service was already available, and filed a challenge with the advertising industry's self-regulatory system run by BBB National Programs. The BBB National Advertising Division (NAD) ruled against AT&T last month and the carrier appealed to the National Advertising Review Board (NARB), which has now also ruled against AT&T...

AT&T, which is also famous for renaming its 4G service "5GE," reluctantly agreed to comply with the recommendation and released a new version of the satellite-calling commercial with more specific disclaimers.
The 30-second ad — titled "Epic Bad Golf Day" — featured Ben Stiller golfing chasing a badly-hit golf ball all the way into the desert (accompanied by the Pixies' song "Where is My Mind").

But according to the article, T-Mobile filed an official complaint with the advertising review board that "the use of humor does not shield an advertiser from its obligation to ensure that claims are truthful and non-misleading." The ad originally included small text that described the depicted satellite call as a "demonstration of evolving technology." The text was changed this week to say that "satellite calling is not currently available...."

The original version also had text that said, "the future of help is an AT&T satellite call away." The NARB concluded that this "statement can be interpreted reasonably as stating that 'future' technology has now arrived... In the updated version of the ad, AT&T changed the text to say that "the future of help will be an AT&T satellite call away."

"Not many Americans have August 6 circled on their calendars," writes the New York Times, "but it's a day that the Japanese can't forget."

79 years after an atomic bomb attack on Hiroshima, the Times visits a hospital that "continues to treat, on average, 180 survivors — known as hibakusha — of the blasts each day." The bombs killed an estimated 200,000 men, women and children and maimed countless more. In Hiroshima 50,000 of the city's 76,000 buildings were completely destroyed. In Nagasaki nearly all homes within a mile and a half of the blast were wiped out. In both cities the bombs wrecked hospitals and schools. Urban infrastructure collapsed...

[T]he hibakusha and their offspring have formed the backbone of atomic memory. Many see their life's work as informing the wider world about what it's like to carry the trauma, stigma and survivor's guilt caused by the bombs, so that nuclear weapons may never be used again. Their urgency to do so has only increased in recent years. With an average age of 85, the hibakusha are dying by the hundreds each month — just as the world is entering a new nuclear age. Countries like the United States, China and Russia are spending trillions of dollars to modernize their stockpiles. Many of the safeguards that once lowered nuclear risk are unraveling, and the diplomacy needed to restore them is not happening. The threat of another blast can't be relegated to history...

Kunihiko Sakuma [who was 9 months old the day of the attack]: "People died or got sick not just right after the bombing. The reality is, their symptoms are emerging even today, 79 years later. I thought all this was in the past. But as I started talking to survivors, I realized their suffering was ongoing. The atomic bomb is such an inhumane weapon, and the effects of radiation stay with survivors for a very long time. That's why they need our continued support."
The article includes this quote from Keiko Ogura, who was 8 years old at the time of the attack — and still worries she hasn't done enough to abolish the use of nuclear weapons: "As survivors, we cannot do anything but tell our story. 'For we shall not repeat the evil' — this is the pledge of survivors. Until we die, we want to tell our story, because it's difficult to imagine."

Many of the stories are horrifying. But I'll note this one by Seiichiro Mise — who on the day of the atomic bomb attack was 10 years old: "I got married in 1964. At the time, people would say that if you married an atomic bomb survivor, any kids you had would be deformed.

"Two years later, I got a call from the hospital saying my baby had been born. But on my way, my heart was troubled. I'm an atomic bomb victim. I experienced that black rain. So I felt anguished. Usually new parents simply ask the doctor, 'Is it a boy or girl?' I didn't even ask that. Instead, I asked, 'Does my baby have 10 fingers and 10 toes?'

"The doctor looked unsettled. But then he smiled and said it was a healthy boy. I was relieved."
The first U.S. president to visit Hiroshima was Barack Obama in 2016. The article notes he did not issue the official apology many Japanese had hoped for. But he did say "we have a shared responsibility to look directly into the eye of history and ask what we must do differently to curb such suffering again...

"Someday the voices of the hibakusha will no longer be with us to bear witness. But the memory of the morning of Aug. 6, 1945, must never fade."

An anonymous reader shared this report from the Observer: Thousands of scientists have protested to the US Congress over the "unprecedented and indefensible" decision by Nasa to cancel its Viper lunar rover mission. In an open letter to Capitol Hill, they have denounced the move, which was revealed last month, and heavily criticised the space agency over a decision that has shocked astronomers and astrophysicists across the globe.

The car-sized rover has already been constructed at a cost of $450 million and was scheduled to be sent to the moon next year, when it would have used a one-metre drill to prospect for ice below the lunar surface in soil at the moon's south pole. Ice is considered to be vital to plans to build a lunar colony, not just to supply astronauts with water but also to provide them with hydrogen and oxygen that could be used as fuels... "Quite frankly, the agency's decision beggars belief," said Prof Clive Neal, a lunar scientist at the University of Notre Dame, in Indiana. "Viper is a fundamental mission on so many fronts and its cancellation basically undermines Nasa's entire lunar exploration programme for the next decade. It is as straightforward as that. Cancelling Viper makes no sense whatsoever."

This view was backed by Ben Fernando of Johns Hopkins University, who was one of the organisers of the open letter to Congress. "A team of 500 people dedicated years of their careers to construct Viper and now it has been cancelled for no good reason whatsoever," he told the Observer last week. "Fortunately I think Congress is taking this issue very seriously and they have the power to tell Nasa that it has to go ahead with the project. Hopefully they will intervene."
"When Nasa announced its decision to abandon Viper, the space agency said it planned to disassemble and reuse its components for other moon missions — unless other space companies or agencies offered to take over the project. More than a dozen groups have since expressed an interest in taking over Viper, a Nasa spokesperson told the Observer last week."

Slashdot reader sciencehabit shared this report from Science magazine: One of the classic tropes of science fiction is terraforming Mars: warming up our cold neighbor so it could support human civilization. The idea might not be so far-fetched, research published today in Science Advances suggests...

Samaneh Ansari [a Ph.D. student at Northwestern University and lead author on the new study] and her colleagues wanted to test the heat-trapping abilities of a substance Mars holds in abundance: dust. Martian dust is rich in iron and aluminum, which give it its characteristic red hue. But its microscopic size and roughly spherical shape are not conducive to absorbing radiation or reflecting it back to the surface. So the researchers brainstormed a different particle: using the iron and aluminum in the dust to manufacture 9-micrometer-long rods, about twice as big as a speck of martian dust and smaller than commercially available glitter. Ansari designed a simulation to test how these theoretical particles would interact with light. She found "unexpectedly huge effects" in how they absorbed infrared radiation from the surface and how they scattered that radiation back down to Mars — key factors that determine whether an aerosol particle creates a greenhouse effect.

Collaborators at the University of Chicago and the University of Central Florida then fed the particles into computer models of Mars's climate. They examined the effect of annually injecting 2 million tons of the rods 10 to 100 meters above the surface, where they would be lofted to higher altitudes by turbulent winds and settle out of the atmosphere 10 times more slowly than natural Mars dust. Mars could warm by about 10 degreesC within a matter of months, the team found, despite requiring 5000 times less material than other proposed greenhouse gas schemes...

Still, "Increasing the temperature of the planet is just one of the things that we would need to do in order to live on Mars without any assistance," says Juan Alday, a postdoctoral planetary science researcher at the Open University not involved with the work. For one, the amount of oxygen in Mars's atmosphere is only 0.1%, compared with 21% on Earth. The pressure on Mars is also 150 times lower than on Earth, which would cause human blood to boil. And Mars has no ozone layer, which means there is no protection from the Sun's harmful ultraviolet radiation. What's more, even once warmed, martian soils may still be too salty or toxic to grow crops. In other words, McInnes says, upping the temperature "isn't some kind of magic switch" that would make Mars habitable.

That isn't stopping Ansari and her colleagues from investigating the possibilities.

Slashdot reader echo123 shared this report from Ars Technica: The NASA program to develop a new upper stage for the Space Launch System rocket is seven years behind schedule and significantly over budget, a new report from the space agency's inspector general finds. However, beyond these headline numbers, there is also some eye-opening information about the project's prime contractor, Boeing, and its poor quality control practices... "We found an array of issues that could hinder SLS Block 1B's readiness for Artemis IV including Boeing's inadequate quality management system, escalating costs and schedules, and inadequate visibility into the Block 1B's projected costs," states the report, signed by NASA's deputy inspector general, George A. Scott.

There are some surprising details in the report about Boeing's quality control practices at the Michoud Assembly Facility in southern Louisiana, where the Exploration Upper Stage is being manufactured. Federal observers have issued a striking number of "Corrective Action Requests" to Boeing. "According to Safety and Mission Assurance officials at NASA and DCMA officials at Michoud, Boeing's quality control issues are largely caused by its workforce having insufficient aerospace production experience," the report states. "The lack of a trained and qualified workforce increases the risk that the contractor will continue to manufacture parts and components that do not adhere to NASA requirements and industry standards."

This lack of a qualified workforce has resulted in significant program delays and increased costs. According to the new report, "unsatisfactory" welding operations resulted in propellant tanks that did not meet specifications, which directly led to a seven-month delay in the program.

Longtime Slashdot reader schwit1 shares a report from Ars Technica: The upper stage from a Chinese rocket that launched a batch of Internet satellites Tuesday has broken apart in space, creating a debris field of at least 700 objects in one of the most heavily-trafficked zones in low-Earth orbit. US Space Command, which tracks objects in orbit with a network of radars and optical sensors, confirmed the rocket breakup Thursday. Space Command initially said the event created more than 300 pieces of trackable debris. The military's ground-based radars are capable of tracking objects larger than 10 centimeters (4 inches). Later Thursday, LeoLabs, a commercial space situational awareness company, said its radars detected at least 700 objects attributed to the Chinese rocket. The number of debris fragments could rise to more than 900, LeoLabs said. The culprit is the second stage of China's Long March 6A rocket, which lifted off Tuesday with the first batch of 18 satellites for a planned Chinese megaconstellation that could eventually number thousands of spacecraft. The Long March 6A's second stage apparently disintegrated after placing its payload of 18 satellites into a polar orbit.

Space Command said in a statement it has "observed no immediate threats" and "continues to conduct routine conjunction assessments to support the safety and sustainability of the space domain." According to LeoLabs, radar data indicated the rocket broke apart at an altitude of 503 miles (810 kilometers) at approximately 4:10 pm EDT (20:10 UTC) on Tuesday, around 13-and-a-half hours after it lifted off from northern China. At this altitude, it will take decades or centuries for the wispy effect of aerodynamic drag to pull the debris back into the atmosphere. As the objects drift lower, their orbits will cross paths with SpaceX's Starlink Internet satellites, the International Space Station and other crew spacecraft, and thousands more pieces of orbital debris, putting commercial and government satellites at risk of collision.

An anonymous reader quotes a report from Ars Technica: Inertial confinement fusion is one method for generating energy through nuclear fusion, albeit one plagued by all manner of scientific challenges (although progress is being made). Researchers at LeHigh University are attempting to overcome one specific bugbear with this approach by conducting experiments with mayonnaise placed in a rotating figure-eight contraption. They described their most recent findings in a new paper published in the journal Physical Review E with an eye toward increasing energy yields from fusion.

The work builds on prior research in the LeHigh laboratory of mechanical engineer Arindam Banerjee, who focuses on investigating the dynamics of fluids and other materials in response to extremely high acceleration and centrifugal force. In this case, his team was exploring what's known as the "instability threshold" of elastic/plastic materials. Scientists have debated whether this comes about because of initial conditions, or whether it's the result of "more local catastrophic processes," according to Banerjee. The question is relevant to a variety of fields, including geophysics, astrophysics, explosive welding, and yes, inertial confinement fusion. [...]

The problem is that hydrodynamic instabilities tend to form in the plasma state -- Banerjee likens it to "two materials [that] penetrate one another like fingers" in the presence of gravity or any accelerating field -- which in turn reduces energy yields. The technical term is a Rayleigh-Taylor instability, which occurs between two materials of different densities, where the density and pressure gradients move in opposite directions. Mayonnaise turns out to be an excellent analog for investigating this instability in accelerated solids, with no need for a lab setup with high temperature and pressure conditions, because it's a non-Newtonian fluid. "We use mayonnaise because it behaves like a solid, but when subjected to a pressure gradient, it starts to flow," said Banerjee. "As with a traditional molten metal, if you put a stress on mayonnaise, it will start to deform, but if you remove the stress, it goes back to its original shape. So there's an elastic phase followed by a stable plastic phase. The next phase is when it starts flowing, and that's where the instability kicks in." In 2019, Banerjee's team conducted experiments that "involved pouring Hellman's Real Mayonnaise [...] into a Plexiglass container and then creating wavelike perturbations in the mayo," writes Ars' Jennifer Ouellette. "One experiment involved placing the container on a rotating wheel in the shape of a figure eight and tracking the material with a high-speed camera, using an image processing algorithm to analyze the footage. Their results supported the claim that the instability threshold is dependent on initial conditions, namely amplitude and wavelength."

"This latest paper sheds more light on the structural integrity of fusion capsules used in inertial confinement fusion, taking a closer look at the material properties, the amplitude and wavelength conditions, and the acceleration rate of such materials as they hit the Rayleigh-Taylor instability threshold."

The FDA has rejected a first-of-its-kind proposal to use the psychedelic drug MDMA as a treatment for post-traumatic stress disorder (PTSD), according to drugmaker Lykos Therapeutics. NBC News reports: There had been intense political pressure on the FDA to approve the drug. Friday's decision was the first time the agency had considered a Schedule 1 psychedelic for medical use. If approved, it would have been the first new treatment for PTSD in more than two decades. Lykos Therapeutics had asked the FDA to approve the drug as part of a treatment regimen, given alongside talk therapy. The agency's decision came after an independent advisory committee in June declined to recommend approval of the drug, saying there was not enough evidence that the therapy was safe and effective.

The committee cited a myriad of concerns, including poorly designed studies, allegations of sexual misconduct during a midstage clinical trial and the potential for serious health risks after taking the drug, including heart problems and abuse. A review by FDA scientists, published ahead of the June meeting, also raised concerns about how the trials were carried out, including that a number of patients and therapists likely were able to guess who was given the medication and who got the placebo. Despite the rejection, experts say they expect that psychedelic therapies are still on their way to FDA approval. There are around four dozen MDMA trials in various stages of clinical development, according to ClinicalTrials.gov. "I think it will be a temporary setback," said Holly Fernandez Lynch, an associate professor of medical ethics at the University of Pennsylvania. "The advisory committee and FDA gave very clear indications of what they're looking for in terms of study design and adverse event reporting, so Lykos and other companies should know pretty clearly how to proceed going forward if they want to get psychedelics approved."

Toxic PFAS "forever chemicals" that leach from landfills into groundwater are among the major pollution sources in the US, and remain a problem for which officials have yet to find an effective solution. Now new research has identified another route in which PFAS may escape landfills and threaten the environment at even higher levels: the air. From a report: PFAS gas that emits from landfill waste ends up highly concentrated in the facilities' gas treatment systems, but the systems are not designed to manage or destroy the chemicals, and much of them probably end up in the environment.

The findings, which showed up to three times as much PFAS in landfill gas as in leachate, are "definitely an alarming thing for us to see," said Ashley Lin, a University of Florida researcher and the lead author of the study. "These findings suggest that landfill gas, a less scrutinized byproduct, serves as a major pathway for the mobility of PFAS from landfills," the paper's authors wrote.

PFAS are a class of about 16,000 compounds used to make products resistant to water, stains and heat. They are called "forever chemicals" because they do not naturally break down and have been found to accumulate in humans. The chemicals are linked to cancer, birth defects, liver disease, thyroid disease, plummeting sperm counts and a range of other serious health problems. As researchers have begun to understand the chemicals' dangers in recent years, the focus has largely been on water pollution, and regulators have said virtually all leachate from the nation's 200 landfills contain PFAS. But scientists are beginning to understand that PFAS air pollution is also a significant threat.

The first therapy that uses gene-editing is to be offered on the NHS in a "revolutionary breakthrough" for patients. From a report: It will be used as a potential cure for the blood disorder beta thalassaemia. Stem cells which make blood will be extracted, reprogrammed to correct the condition and returned to the patient's body. It could spare them needing a blood transfusion, every three to five weeks, for life. People with beta thalassaemia struggle to produce enough haemoglobin, which is the protein in red blood cells that carries oxygen around the body. It is a genetic disease that is passed down through families and caused by defects in the body's instructions for manufacturing haemoglobin. It can leave people severely tired, weak, and short of breath and also cuts life expectancy.

Another study is raising concern about the safety of the widely used sugar alcohol sweetener erythritol, a low-calorie sugar substitute found in "keto-friendly" foods, baked goods and candies. From a report: Researchers from the Cleveland Clinic compared erythritol to typical sugar and found only erythritol caused worrisome cardiovascular effects. Although the study was small, it's the first head-to-head look at people's blood levels after they consume products with erythritol or sugar (glucose). "We compared the results, and glucose caused none of the problems," said Dr. Stanley Hazen, a cardiologist at the Cleveland Clinic and the lead author of the study, published Thursday morning in the journal Arteriosclerosis, Thrombosis, and Vascular Biology.

Erythritol is one ingredient on a growing list of nonsugar sweeteners found in low-calorie and sugar-free foods. Erythritol and xylitol are sugar alcohols that are sweet like sugar but with far fewer calories. Erythritol is often mixed with another sweetener, stevia, and xylitol is often found in gum, mouthwash and toothpaste. Earlier studies from Hazen's lab -- one published last year and the other in June -- found potential links between the sugar alcohols and an increased risk of heart attacks and strokes. The research suggested both sugar alcohols might make blood platelets stickier and therefore more susceptible to clotting and blocking veins or arteries, in turn contributing to heart attacks and strokes. For the new research, Hazen's team analyzed the heart effects of erythritol and regular sugar -- in this case, simple glucose -- by enrolling two groups of healthy middle-aged male and female volunteers: 10 who consumed the erythritol and 10 who consumed sugar.

An anonymous reader quotes a report from the New York Times: For weeks, NASA has downplayed problems experienced by Starliner, a Boeing spacecraft that took two astronauts to the International Space Station in June. But on Wednesday, NASA officials admitted that the problems with the spacecraft were more serious than first thought and that the astronauts may not travel home on the Boeing vehicle, after all. The agency is exploring a backup option for the astronauts, Suni Wiliams and Butch Wilmore, to hitch a ride back to Earth on a vehicle built by Boeing's competitor SpaceX instead. Their stay in orbit, which was to be as short as eight days, may extend into next year. "We could take either path," Ken Bowersox, NASA's associate administrator for the space operations mission directorate, said during a news conference on Wednesday. "And reasonable people could pick either path."

NASA and Boeing officials had maintained that the crew that launched with Starliner on its first crewed test flight was not stranded in space. Ms. Williams and Mr. Wilmore have spent two months aboard the orbital outpost while engineers continue to analyze data about the faulty performance of several of the Starliner's thrusters when it approached for docking. Under the contingency plan, a SpaceX Crew Dragon capsule would travel to the space station with two astronauts instead of its planned crew of four. Ms. Williams and Mr. Wilmore would then join as full-time members of the space station crew for a half-year stay, returning on the Crew Dragon around next February. "In the last few weeks, we have decided to make sure we have that capability there, as our community, I would say, got more and more uncomfortable," said Steve Stich, the manager of the commercial crew program at NASA. NASA officials said no decision had been made yet.