Smartphones and electric cars are both powered by lithium-ion batteries, notes the Economist. These "Li-ion" batteries "form the guts of a growing number of grid-storage systems that smooth the flow of electricity from wind and solar power stations. Without them, the electrification needed to avoid the worst effects of global warming would be unimaginable." But unfortunately, building them requires scarce metals.

"A clutch of companies, though, think they have an alternative: making batteries with sodium instead..." And the idea of building "Na-ion" batteries at scale is "gaining traction." Engineers are tweaking designs. Factories, particularly in China, are springing up. For the first time since the Li-ion revolution began, lithium's place on the electrochemical pedestal is being challenged... [A]ccording to Rory McNulty, a research analyst at Benchmark, Chinese firms have 34 Na-ion-battery factories built, being built or announced inside the country, and one planned in Malaysia. Established battery-makers in other places, by contrast, are not yet showing much interest. Even without a five-year plan to guide them, though, some non-Chinese startups are seeking to steal a march by developing alternatives to layered oxides, in the hope of improving the technology, reducing its cost, or both.

One of the most intriguing of these neophytes is Natron Energy, of Santa Clara, California... Natron claims that its cells can endure 50,000 cycles of charging and discharging — between ten and 100 times more than commercial Li-ion batteries can manage. The firm has built a factory in Michigan, which it says will begin production later this year. Other non-Chinese firms are less far advanced, but full of hope. Altris, in Sweden, which is also building a factory, employs a material called Prussian white that substitutes some of the iron in Prussian blue with sodium. Tiamat, in France, uses a polyanionic design involving vanadium. And Faradion, in Britain (now owned by Reliance, an Indian firm), intends to stick with a layered-metal-oxide system.
Thanks to Slashdot reader echo123 for sharing the article.

Bill Gates, noted billionaire philanthropist, discussed the need for "impatient optimism" about both climate change and global development last month during an interview at an international affairs think tank: Q: If you go back a decade, are you more or less optimistic about where we are on climate change now, or then?

Bill Gates: I'm certainly more optimistic because in 2015, when the Paris Agreement was signed, there were so many areas of emission where there wasn't any activity...

Q: if you go back a decade, solar and wind were the most expensive energy sources we had. Since then, the price of solar has dropped 90%, and the price of wind has dropped 70%, and electric vehicles are now economically viable... I know you get excited about innovation. What are some of the areas that you're most excited about for innovation?

Bill Gates: Across this portfolio of 100 companies it's hard to pick my favorite. Some are kind of straightforward, like a company that makes windows where the temperature doesn't cross over, but instead, it blocks getting cold in the winter or hot in the summer, which is very cheap. Or there is a company where you leave your home, and you pump this air through, but it's got a chemical in it. When it sees cracks, it actually seals those cracks. You don't have to find the cracks; you just pump the air in. You can reduce the amount of heat loss between the windows and getting rid of those cracks. You can reduce the energy bill by a factor of two, which then means less load on the overall energy system...

The cement and steel ones are the ones, in a way, I'm most impressed by, because I wasn't sure we'd find anything in those spaces...

Q: The problem, I guess, with cement is that you are taking basically limestone, and then you are converting it to calcium oxide. But the byproduct you get in that conversion process is CO2. Basically, you need a way to capture that CO2....

Bill Gates: As you heat the limestone, that releases CO2. It's exactly as you say, it's an equal number amount of emissions. One of our companies doesn't use limestone. They actually go and find another source of calcium, which fortunately turns out to be quite abundant and cheap. They make exactly the same cement that we make today, but not using limestone as the input. I was stunned that you could do that.
Gates also hopes to see nuclear power in an economically viable form. "The nuclear industry basically failed, because their product was too expensive. It wasn't because of the waste or safety-type issues, which we can get into those, but it was economics." Bill Gates: First and foremost, you must have a much different economic proposition. The nuclear reactor I'm involved in, TerraPower, we only generate electricity when the renewable sources that have very little marginal costs aren't generating. We just make heat all day, and then only when the bid price of electricity is high enough, do we actually generate electricity, because otherwise, you have all this capital cost that half the time, the solar bid into that market is going to be very low.

I think fission, we shouldn't give up on it. I'm involved in that company only because it may be able to make a significant contribution to [fighting] climate change... I can't overstate how much easier it is to solve the problem if you can mix in some degree of fission or fusion that are there to fill in the periods where renewables are not generating. Cold snaps or where you have these cold fronts just sitting there, that's when houses need the most heating. That's when neither wind nor solar are generating.

Scientists recently noticed that the chemical fingerprint of meteor particles was starting to change.

And last month Purdue University announced that "The Space Age is leaving fingerprints on one of the most remote parts of the planet — the stratosphere — which has potential implications for climate, the ozone layer and the continued habitability of Earth." Using tools hitched to the nose cone of their research planes and sampling more than 11 miles above the planet's surface, researchers have discovered significant amounts of metals in aerosols in the atmosphere, likely from increasingly frequent launches and returns of spacecraft and satellites. That mass of metal is changing atmospheric chemistry in ways that may impact Earth's atmosphere and ozone layer...

Led by Dan Murphy, an adjunct professor in Purdue's Department of Earth, Atmospheric, and Planetary Sciences and a researcher at the National Oceanic and Atmospheric Administration, the team detected more than 20 elements in ratios that mirror those used in spacecraft alloys. They found that the mass of lithium, aluminum, copper and lead from spacecraft reentry far exceeded those metals found in natural cosmic dust. Nearly 10% of large sulfuric acid particles — the particles that help protect and buffer the ozone layer — contained aluminum and other spacecraft metals.
Thanks to long-time Slashdot reader AmiMoJo for sharing the article.

Ars Technica reports: In three-and-a-half years of service, one of SpaceX's reusable Falcon 9 boosters stands apart from the rest of the company's rocket inventory. This booster, designated with the serial number B1058, has now flown 18 times.

For its maiden launch on May 30, 2020, the rocket propelled NASA astronauts Doug Hurley and Bob Behnken into the history books on SpaceX's first mission to send people into orbit. This ended a nine-year gap in America's capability to launch astronauts into low-Earth orbit and was the first time a commercial spacecraft achieved this feat... Over the course of its flights to space and back, that white paint has darkened to a charcoal color. Soot from the rocket's exhaust has accumulated, bit by bit, on the 15-story-tall cylinder-shaped booster. The red NASA worm logo is now barely visible.

On Friday night, this rocket launched for the 18th time, breaking a tie at 17 flights with another Falcon 9 booster in SpaceX's fleet... It fired three engines for a braking burn to slow for reentry, then ignited a single engine and extended four carbon-fiber landing legs to settle onto a floating platform holding position near the Bahamas. The drone ship will return the rocket to Cape Canaveral, where SpaceX will refurbish the vehicle for a 19th flight.
Other interesting statistics from the article:

• This single booster rocket has launched 846 satellites into space. (Astrophysicist/spaceflight tracker Jonathan McDowell calculates there are now over 5,000 Starlink satellites in orbit.)

• A SpaceX official told Ars Technica the company might extend the limit on Falcon 9 booster flights beyond 20 for Starlink satellites.

• Friday's launch became the 79th launch so far in 2023 of a Falcon rocket, with SpaceX aiming for a total of 100 by the end of December, and 144 in 2023 (an average of one flight every two-and-a-half days).

• Since 2016, SpaceX has now had 249 consecutive successful launches of its Falcon 9 and Falcon Heavy rockets

Long-time Slashdot reader thepacketmaster writes: Documented in a recent article in the journal Nature, researchers have found an abundance of both helium-4 and helium-3 trapped in the volcanic rocks on Canada's Baffin Island.

As the Earth formed, it is thought that helium-4 and helium-3 flowing on the solar wind became trapped in the minerals of the cooling planet. With heavier elements and minerals sinking to the bottom, this trapped helium was transported to the core, where it would have remained locked in its original forms.

Earth isn't massive enough to hold on to helium in any significant quantities, though. Any that did not get trapped, or that was subsequently released when the minerals melted in the mantle or due to massive impacts, would have eventually seeped up to the surface and floated off into space. So, helium is relatively rare on Earth, and helium-3 is even more so.

Tuesday Orsted cancelled two wind farms near New Jersey that would've generated about 2.2 gigawatts of energy. But the same day America's Interior Department approved plans to install up to 176 wind turbines off the coast of Virginia with an estimated capacity of about 2.6 gigawatts of clean energy.

Located approximately 27 miles from the shores of Virginia Beach, the project will be America's largest offshore wind project, capable of powering over 900,000 homes. In just its first 10 years it should save customers $3 billion in fuel costs, Dominion Energy told the Associated Press: Dominion expects construction to be completed by late 2026... Construction of the project in Virginia is expected to support about 900 jobs each year and then an estimated 1,100 annual jobs during operations, the Interior Department said. The initiative has gained wide support from Virginia policymakers and political leaders, including Republican Gov. Glenn Youngkin, who last week attended a reception marking the arrival of eight monopile foundations for the windfarm.
Two pilot turbines have already been in place since 2020, the article points out. And when finished the new wind farm "would bolster and eventually replace the mostly natural gas-powered electricity that is contributing to costly climate change," reports MarketWatch President Biden, early in his first term, announced a goal of installing 30 gigawatts of offshore wind power by 2030, enough to power 10 million homes and prevent the spewing of 78 million metric tons of carbon-dioxide emissions... U.S. offshore wind has been helped along by nearly $8 billion in investments since Biden signed his signature, climate-heavy Inflation Reduction Act a little over a year ago... Biden's team has projected that the U.S. could install 110 gigawatts of offshore wind power by 2050, a major jump considering there is less than 1 gigawatt installed today. Land-based wind farms across the U.S. already produce more than 140 gigawatts of energy, contributing to about 10% of the nation's energy portfolio...

When measured by announced plans and pledges, the country has been barreling toward its offshore goal. To date, the Department of the Interior has approved four New England-based projects that, together with the new Coastal Virginia Offshore Wind project, promise to deliver 5 gigawatts of electricity, enough to power 1.75 million homes with average power use. A total of more than 51 gigawatts of wind power capacity is in the works off U.S. shores and the most ambitious 10 coastal states have combined offshore wind goals of generating more than 81 gigawatts.

Jeff Foust reports via SpaceNews: A NASA official opened the door to keeping the International Space Station in operation beyond 2030 if commercial space stations are not yet ready to take over by the end of the decade. Speaking at the Beyond Earth Symposium here Nov. 2, Ken Bowersox, NASA associate administrator for space operations, said it was "not mandatory" to retire the ISS as currently planned at the end of the decade depending on the progress companies are making on commercial stations. "The timeline is flexible," he said of that transition from the ISS to commercial stations. "It's not mandatory that we stop flying the ISS in 2030. But, it is our full intention to switch to new platforms when they're available." [...]

Bowersox acknowledged that schedule depends on the readiness of those commercial stations. "When it happens is going to depend a lot the maturity of the market," he said, which includes both the status of commercial stations and non-NASA customers for them. He made it clear that NASA does not expect to be the only customer for commercial stations. NASA's current requirements for those stations anticipate having two astronauts at a time on them, less than the ISS. "We looked at what we thought would be reasonable and what would actually give us a cost savings," he said of that requirement. "My biggest concern is if we get too far ahead of where the market and NASA has to carry the full cost of the platforms for longer, and we transition too quickly," he said. That could force NASA to move money from current ISS utilization to support those stations. "If we have a badly managed transition, we could find ourselves getting weak in those areas."

An anonymous reader quotes a report from the New York Times: Later this month, delegations from around the world will head to a conference in Dubai to discuss international treaties involving radio frequencies, satellite coordination and other tricky technical issues. These include the nagging problem of the clocks. For 50 years, the international community has carefully and precariously balanced two different ways of keeping time. One method, based on Earth's rotation, is as old as human timekeeping itself, an ancient and common-sense reliance on the position of the sun and stars. The other, more precise method coaxes a steady, reliable frequency from the changing state of cesium atoms and provides essential regularity for the digital devices that dominate our lives.

The trouble is that the times on these clocks diverge. The astronomical time, called Universal Time, or UT1, has tended to fall a few clicks behind the atomic one, called International Atomic Time, or TAI. So every few years since 1972, the two times have been synced by the insertion of leap seconds — pausing the atomic clocks briefly to let the astronomic one catch up. This creates UTC, Universal Coordinated Time. But it's hard to forecast precisely when the leap second will be required, and this has created an intensifying headache for technology companies, countries and the world's timekeepers.

"Having to deal with leap seconds drives me crazy," said Judah Levine, head of the Network Synchronization Project in the Time and Frequency Division at the National Institute of Standards and Technology in Boulder, Colo., where he is a leading thinker on coordinating the world's clocks. He is constantly badgered for updates and better solutions, he said: "I get a bazillion emails." On the eve of the next international discussion, Dr. Levine has written a paper that proposes a new solution: the leap minute. The idea is to sync the clocks less frequently, perhaps every half-century, essentially letting atomic time diverge from cosmos-based time for 60 seconds or even a tad longer, and basically forgetting about it in the meantime. The proposal from Levine may face opposition from vested interests and strong opinions in the international community -- notably, the Russians and the Vatican. "The head of the IBWM (or BIPM in French) said in November 2022 that Russia opposed the dropping of leap seconds because it wanted to wait until 2040," reports Ars Technica. "The nation's satellite positioning system, GLONASS, was built with leap seconds in mind, and reworking the system would seemingly be taxing."

"There's also the Vatican, which has concerned itself with astronomy since at least the Gregorian Calendar, and may also oppose the removal of leap seconds. The Rev. Paul Gabor, astrophysicist and vice director of the Vatican Observatory Research Group in Tucson, Arizona, has been quoted and cited as opposing the deeper separation of human and planetary time. Keeping proper time, Gabor wrote his 2017 book The Science of Time, is 'one of the oldest missions of astronomy.'"

"In the current Leap Second Debate, there are rational arguments, focused on practical considerations, and there is a certain unspoken unease, emerging from the symbolic substrata of the issues involved," Gabor writes.

An anonymous reader quotes a report from the New York Times: Ken Mattingly, who orbited the moon and commanded a pair of NASA shuttle missions, but who was remembered as well for the flight he didn't make -- the near-disastrous mission of Apollo 13 -- died on Tuesday in Arlington, Va. He was 87. His death was confirmed by Cheryl Warner, a NASA spokeswoman. She did not specify the cause or say whether he died at home in Arlington or in a hospital there. Mr. Mattingly, a former Navy jet pilot with a degree in aeronautical engineering, joined NASA in 1966. But his first spaceflight didn't come until April 1972, when the space agency launched Apollo 16, the next-to-last manned mission to the moon. Piloting the spacecraft's command module in orbit while holding the rank of lieutenant commander, he took extensive photos of the moon's terrain and conducted experiments while Cmdr.John W. Young of the Navy and Lt. Col. Charles M. Duke Jr. of the Air Force, having descended in the lunar lander, collected rock and soil samples from highlands near the crater known as Descartes.

While the three astronauts were en route back to Earth, Commander Mattingly stepped outside the spacecraft -- which he had named Casper for the resemblance, as least in a child's eye, between an astronaut in a bulky spacesuit and the cartoon character Casper the Friendly Ghost. Maneuvering along handrails while connected to the spacecraft by a tether, he retrieved two attached canisters of film with photos of the moon that he had taken from inside the capsule for analysis back on Earth. When the Apollo program ended, Commander Mattingly headed the astronaut support office for the shuttle program, designed to ferry astronauts to and from an eventual Earth-orbiting International Space Station. In the summer of 1982, he commanded the fourth and final Earth-orbiting test flight of the shuttle Columbia, which completed 112 orbits. He was also the commander of the first space shuttle flight conducted for the Department of Defense, a classified January 1985 mission aboard Discovery.

All those achievements came after he had been scrubbed at virtually the last moment from the flight of Apollo 13 in April 1970. He was to have orbited the moon in the command module while Cmdr.James A. LovellJr. of the Navy and Fred W. Haise Jr. explored the lunar surface. But NASA removed Commander Mattingly from the crew in the final days before launching, when blood tests determined that he had recently been exposed to German measles from training with Colonel Duke, the backup lunar module pilot, who in turn had contracted it from his proximity to an infected child at a neighborhood party. Commander Mattingly was the only one of the Apollo 13 crewmen who were found to lack antibodies against the illness. His backup, John L. Swigert Jr., became the command module pilot, leaving Commander Mattingly to watch the progress ofthe flight from mission control. [...] After his Apollo and space shuttle flights, Mr. Mattingly continued to work for NASA in the 1980s. He retired from the space agency and the Navy as a rear admiral and went on to work for aerospace companies.

A top scientist has proposed a new way to reconcile the two different ways that our clocks keep time. Meet -- wait for it -- the leap minute. From a report: Later this month, delegations from around the world will head to a conference in Dubai to discuss international treaties involving radio frequencies, satellite coordination and other tricky technical issues. These include the nagging problem of the clocks. For 50 years, the international community has carefully and precariously balanced two different ways of keeping time. One method, based on Earth's rotation, is as old as human timekeeping itself, an ancient and common-sense reliance on the position of the sun and stars. The other, more precise method coaxes a steady, reliable frequency from the changing state of cesium atoms and provides essential regularity for the digital devices that dominate our lives.

The trouble is that the times on these clocks diverge. The astronomical time, called Universal Time, or UT1, has tended to fall a few clicks behind the atomic one, called International Atomic Time, or TAI. So every few years since 1972, the two times have been synced by the insertion of leap seconds -- pausing the atomic clocks briefly to let the astronomic one catch up. This creates UTC, Universal Coordinated Time. But it's hard to forecast precisely when the leap second will be required, and this has created an intensifying headache for technology companies, countries and the world's timekeepers.

"Having to deal with leap seconds drives me crazy," said Judah Levine, head of the Network Synchronization Project in the Time and Frequency Division at the National Institute of Standards and Technology in Boulder, Colo., where he is a leading thinker on coordinating the world's clocks. He is constantly badgered for updates and better solutions, he said: "I get a bazillion emails." On the eve of the next international discussion, Dr. Levine has written a paper that proposes a new solution: the leap minute. The idea is to sync the clocks less frequently, perhaps every half-century, essentially letting atomic time diverge from cosmos-based time for 60 seconds or even a tad longer, and basically forgetting about it in the meantime.

Around 66 million years ago, the Chicxulub asteroid caused a mass extinction event, killing three-quarters of life on Earth, including the dinosaurs. A new study suggests that fine silicate dust from the asteroid, which remained in the atmosphere for up to 15 years, played a more significant role in causing the impact winter and extinction than previously thought. Phys.Org reports: Fine silicate dust from pulverized rock would have stayed in the atmosphere for 15 years, dropping global temperatures by up to 15 degrees Celsius, researchers said in a study in the journal Nature Geoscience. [...] For the study, the international team of researchers was able to measure dust particles thought to be from right after the asteroid struck. The particles were found at the Tanis fossil site in the US state of North Dakota.

Though 3,000 kilometers (1,865 miles) away from the crater, the site has preserved a number of remarkable finds believed to be dated from directly after the asteroid impact in sediment layers of an ancient lake. The dust particles were around 0.8 to 8.0 -- micrometers -- just the right size to stick around in the atmosphere for up to 15 years, the researchers said.

Entering this data into climate models similar to those used for current-day Earth, the researchers determined that dust likely played a far greater role in the mass extinction than had previously been thought. Out of all the material that was shot into the atmosphere by the asteroid, they estimated that it was 75 percent dust, 24 percent sulfur and one percent soot. The dust particles "totally shut down photosynthesis" in plants for at least a year, causing a "catastrophic collapse" of life, [said Ozgur Karatekin, a researcher at the Royal Observatory of Belgium].

An anonymous reader shares a report: PFAS stands for "per- and polyfluoroalkyl substances," a family of upwards of 15,000 or more human-made and incredibly durable chemical compounds that have been used in countless industrial and consumer applications for decades. Firefighting foams, waterproof hiking boots, raincoats, nonstick frying pans, dental floss, lipstick, and even the ink used to label packaging -- all can contain PFAS. The compounds are ubiquitous in drinking water and soil, even migrating to Arctic sea ice. PFAS are called forever chemicals because once present in the environment, they do not degrade or break down. They accumulate, are transferred throughout the watershed, and ultimately persist. The quest to reduce the amount of PFAS in the environment is what led me to an industrial park in a southern suburb of Grand Rapids, Michigan. The jar of PFAS concentrate in my hand is part of a demonstration arranged by my hosts, Revive Environmental, during a tour of the company's PFAS destruction site, one of the first in the country to operate commercially and at scale. A few yards in front of me sits the company's PFAS "Annihilator" in a white shipping container.

The Annihilator represents just one of several technologies now vying to break down and destroy PFAS. These span the gamut from established processes like electrochemical oxidation and supercritical water oxidation to emerging techniques relying on ultraviolet light, plasma, ultrasound, or catalyst-driven thermal processes. Some are deployed in field tests. Other companies are actively running pilot programs, many with various divisions of the US Department of Defense and other government agencies. And many other technologies are still undergoing laboratory research. There's good reason for this. Not only are PFAS everywhere around us; they're also in us. Humans can't break down PFAS, and our bodies struggle to clear them from our systems. Studies suggest they're in my blood and yours -- the majority of Americans,' in fact -- and they have been linked to increased risks of kidney and testicular cancer, decreased infant birthweights, and high blood pressure. And that's only what we know about now: researchers continue to grapple with the full impacts of PFAS on human and environmental health.

Efforts to curb emissions of a powerful greenhouse gas commonly produced as a by-product of refrigerant manufacture might be falling short, and it seems eastern China is a major culprit. Nature: The hydrofluorocarbon gas, HFC-23, is around 14,700 times as powerful as carbon dioxide at warming the globe and has long been the subject of national and international climate-change mitigation efforts. Those efforts gained new traction nearly a decade ago when China and India -- the world's largest producers of the chemical -- agreed to dial down its emissions. New research, however, confirms that emissions continued to rise in subsequent years, and an analysis of data from atmospheric-monitoring stations suggests that factories in eastern China are responsible for nearly half of the total.

The rogue emissions are one of several air-pollution sources under discussion at the latest meeting of the Montreal Protocol, held in Nairobi, Kenya, this week. Signed in 1987, the Montreal Protocol is generally considered the most effective international environmental treaty in history, having halted the destruction of the ozone layer while also slowing down global warming. But scientists have often played a role, scanning the atmosphere for chemicals, such as ozone-depleting chlorofluorocarbons (CFCs), that governments have agreed to phase out. "Science has been instrumental in evaluating compliance under the treaty," says Megan Lickley, a climate scientist at Georgetown University in Washington DC.

An anonymous reader shares a report: It was always abundantly clear that the leader of the Russian space corporation Roscosmos from 2018 to 2022, Dmitry Rogozin, sought to kowtow to Russian President Vladimir Putin. Now we have an anecdote from Putin himself that highlights how much. The story concerns a satellite constellation now known as Sfera (or Sphere, in English), a modestly ambitious constellation of 264 satellites. The Sphere constellation is intended to provide broadband Internet service from middle-Earth orbit to Russia as well as high-resolution Earth observation satellites.

As is usual with Russian space projects, because they tend to be poorly funded, the timeline for Sphere's deployment has been delayed and its scope reduced. It also underwent an unscheduled name change. Prior to 2018, this satellite program was known as Ehfir (Ether), a reference to the invisible substance once thought to fill the universe and the medium through which light waves propagated.

However that changed in 2018 when Putin was publicly announcing the program's creation. He recently recalled this in remarks that were recorded by RIA Novosti's Telegram channel. They were translated for Ars by Rob Mitchell. "At first it was called Ehfir," Putin said. "And at one of my public speeches I was talking and said it was Sfera. I arrived at the Kremlin, and the former Roscosmos head greeted me and said, 'Vladimirovich, you said it was project Sfera, Sfera you said. That's what it is, project Sfera.'"

Rogozin, who was listening to these remarks, acted immediately -- presumably to save his boss from embarrassment. After Rogozin said the constellation was named Sphere, Putin recalled that he asked how's that? Rogozin replied that it had already been renamed Sfera, not to worry. Laughing, Putin added, "So I didn't even make it back and it's already renamed to Sfera. So I said, well, OK then." Rogozin confirmed the anecdote on his Telegram channel this week.

The UK's oil and gas regulator is coming under fire from environmental groups for using lawyers to try to prevent the publication of five key documents relating to the environmental impact of Shell's activities in the North Sea. From a report: At a hearing in December, a legal representative for the North Sea Transition Authority (NSTA) is expected to argue against the publication of documents that contain details about the risk of pollution as a result of decommissioning the Brent oilfield, which was operated by Shell for more than 40 years. It says it opposes publication "on a matter of process basis." Shell has applied for an exemption from international rules that require all infrastructure to be removed from the field and the UK government is deciding whether it will allow the oil company to leave the 170-metre-high oil platform legs in place for the three platforms known as Bravo, Charlie and Delta.

A total of 64 concrete storage cells are contained in the leg structures, 42 of which have previously been used for oil storage and separation. Most of the cells are the size of seven Olympic swimming pools, and collectively still contain an estimated 72,000 tonnes of contaminated sediment and 638,000 cubic metres of oily water. Environmental groups believe the documents held by the NSTA would reveal new information about long-term environmental dangers that is relevant to other North Sea oil developments, including Equinor's plans to develop Rosebank, the UK's largest untapped field.

Alexandra Witze reports via Nature: A meteorite that slammed into Mars in September 2021 has rewritten what scientists know about the planet's interior. By analysing the seismic energy that vibrated through the planet after the impact, researchers have discovered a layer of molten rock that envelops Mars's liquid-metal core. The finding, reported today in two papers in Nature, means that the Martian core is smaller than previously thought. It also resolves some lingering questions about how the red planet formed and evolved over billions of years.

The discovery comes from NASA's InSight mission, which landed a craft with a seismometer on Mars's surface. Between 2018 and 2022, that instrument detected hundreds of "marsquakes' shaking the planet. In July 2021, on the basis of the mission's observations of 11 quakes, researchers reported that the liquid core of Mars seemed to have a radius of around 1,830 kilometers3. That was bigger than many scientists were expecting. And it suggested that the core contained surprisingly high amounts of light chemical elements, such as sulfur, mixed with iron. But the September 2021 meteorite impact "unlocked everything," says Henri Samuel, a geophysicist at the Institute of Earth Physics of Paris and lead author of one of today's papers1. The meteorite struck the planet on the side opposite to where InSight was located. That's much more distant than the marsquakes that InSight had previously studied, and allowed the probe to detect seismic energy traveling all the way through the Martian core4. "We were so excited," says Jessica Irving, a seismologist at the University of Bristol, UK, and a co-author of Samuel's paper.

For Samuel, it was an opportunity to test his idea that a molten layer of rock surrounds Mars's core5. The way the seismic energy traversed the planet showed that what scientists had thought was the boundary between the liquid core and the solid mantle, 1,830 kilometers from the planet's centre, was actually a different boundary between liquid and solid. It was the top of the newfound layer of molten rock meeting the mantle (see 'Rethinking the Martian core'). The actual core is buried beneath that molten-rock layer and has a radius of only 1,650 kilometers, Samuel says. The revised core size solves some puzzles. It means that the Martian core doesn't have to contain high amounts of light elements -- a better match to laboratory and theoretical estimates. A second liquid layer inside the planet also meshes better with other evidence, such as how Mars responds to being deformed by the gravitational tug of its moon Phobos.

The second paper in Nature today2, from a team independent of Samuel's, agrees that Mars's core is enveloped by a layer of molten rock, but estimates that the core has a radius of 1,675 kilometers. The work analyzed seismic waves from the same distant meteorite impact, as well as simulations of the properties of mixtures of molten elements such as iron, nickel and sulfur at the high pressures and temperatures in the Martian core. Having molten rock right up against molten iron "appears to be unique," says lead author Amir Khan, a geophysicist at ETH Zurich. "You have this peculiarity of liquid-liquid layering, which is something that doesn't exist on the Earth." The molten-rock layer might be left over from a magma ocean that once covered Mars. As it cooled and solidified into rock, the magma would have left behind a deep layer of radioactive elements that still release heat and keep rock molten at the base of the mantle, Samuel says.

An anonymous reader quotes a report from MIT Technology Review: Egbert Edelbroek was acting as a sperm donor when he first wondered whether it's possible to have babies in space. Curious about the various ways that donated sperm can be used, Edelbroek, a Dutch entrepreneur, began to speculate on whether in vitro fertilization technology was possible beyond Earth -- or could even be improved by the conditions found there. Could the weightlessness of space be better than a flat laboratory petri dish? Now Edelbroek is CEO of SpaceBorn United, a biotech startup seeking to pioneer the study of human reproduction away from Earth. Next year, he plans to send a mini lab on a rocket into low Earth orbit, where in vitro fertilization, or IVF, will take place. If it succeeds, Edelbroek hopes his work could pave the way for future space settlements.

"Humanity needs a backup plan," he says. "If you want to be a sustainable species, you want to be a multiplanetary species." Beyond future space colonies, there is also a more pressing need to understand the effects of space on the human reproductive system. No one has ever become pregnant in space -- yet. But with the rise of space tourism, it's likely that it will eventually happen one day. Edelbroek thinks we should be prepared. Despite the burgeoning interest in deep space exploration and settlement, prompted in part by billionaires such as Elon Musk and Jeff Bezos, we still know very little about what happens to our reproductive biology when we're in orbit. A report released in September by the US National Academies of Science, Engineering, and Medicine points out that almost no research has been done on human reproduction in space, adding that our understanding of how space affects reproduction is "vital to long-term space exploration, but largely unexplored to date."

Some studies on animals have suggested that the various stages of reproduction -- from mating and fertilization to embryo development, implantation, pregnancy, and birth -- can function normally in space. For example, in the very first such experiment, eight Japanese medaka fish developed from egg to hatchling aboard the space shuttle Columbia in 1994. All eight survived the return to Earth and seemed to behave normally.Yet other studies have found evidence that points to potential problems. Pregnant rats that spent much of their third trimester -- a total of five days -- on a Soviet satellite in 1983 experienced complications during labor and delivery. Like all astronauts returning to Earth, the rats were exhausted and weak. Their deliveries lasted longer than usual, likely because of atrophied uterine muscles. All the pups in one of the litters died during delivery, the result of an obstruction thought to be due in part to the mother's weakened state.

To Edelbroek, these inconclusive results point to a need to systematically isolate each step in the reproductive process in order to better understand how it is affected by conditions like lower gravity and higher radiation exposure. The mini lab his company developed is designed to do exactly that. It is about the size of a shoebox and uses microfluidics to connect a chamber containing sperm to a chamber containing an egg. It can also rotate at different speeds to replicate the gravitational environment of Earth, the moon, or Mars. It is small enough to fit inside a capsule that can be housed on top of a rocket and launched into space.After the egg has been fertilized in the device, it splits into two cells, each of which divides again to form four cells and so on. After five to six days, the embryo reaches a stage known as a blastocyst, which looks like a hollow ball. At this point, the embryos in the mini lab will be cryogenically frozen for their return to Earth.

NASA is demonstrating laser communications on multiple missions -- showcasing the benefits infrared light can have for science and exploration missions transmitting terabytes of important data. NASA: The International Space Station is getting a "flashy" technology demonstration this November. The ILLUMA-T (Integrated Laser Communications Relay Demonstration Low Earth Orbit User Modem and Amplifier Terminal) payload is launching to the International Space Station to demonstrate how missions in low Earth orbit can benefit from laser communications. Laser communications uses invisible infrared light to send and receive information at higher data rates, providing spacecraft with the capability to send more data back to Earth in a single transmission and expediting discoveries for researchers.

Managed by NASA's Space Communications and Navigation (SCaN) program, ILLUMA-T is completing NASA's first bi-directional, end-to-end laser communications relay by working with the agency's LCRD (Laser Communications Relay Demonstration). LCRD launched in December 2021 and is currently demonstrating the benefits of laser communications from geosynchronous orbit by transmitting data between two ground stations on Earth in a series of experiments. Some of LCRD's experiments include studying atmospheric impact on laser signals, confirming LCRD's ability to work with multiple users, testing network capabilities like delay/disruption tolerant networking (DTN) over laser links, and investigating improved navigation capabilities.

Demand for climate-warming fuels like coal, oil and natural gas will likely peak before 2030, evidence of the accelerating global shift to energy that doesn't emit greenhouse gasses, according to the International Energy Agency (IEA)'s World Energy Outlook. From a report: "The transition to clean energy is happening worldwide and it's unstoppable. It's not a question of 'if', it's just a matter of 'how soon' -- and the sooner the better for all of us," said Fatih Birol, IEA executive director, in a statement. The agency represents countries that make up more than 80% of global energy consumption. The annual IEA report estimates that in 2030 there will be 10 times as many electric vehicles on the road worldwide and 50% of the cars sold in the United States will be electric. The agency says solar panels installed across the globe will generate more electricity at the end of the decade than the U.S. power system produces now. And the report projects that renewable energy will supply 50% of the world's electricity needs, up from about 30% now.

But the report warns the pace of the transition will have to quicken considerably in order to limit global warming to 1.5 degrees Celsius, or 2.7 degrees Fahrenheit, and avoid some of the worst case scenarios in a changing climate. The IEA's outlook lays out a strategy for meeting that goal that includes tripling renewable energy, doubling energy efficiency measures and slashing methane emissions from fossil fuel operations by 75% by 2030. Methane has more than 25 times the climate-warming potential of carbon dioxide, according to the Environmental Protection Agency. Climate and anti-fossil fuel groups say the IEA's methane strategy should be even more aggressive.

Companies including Nestle, Unilever, Mahindra Group and Volvo Cars are urging political leaders to agree a timeline at the upcoming U.N. climate summit to phase out fossil fuels. From a report: The 131 companies, which have nearly $1 trillion in global annual revenues, wrote in a letter published on Monday that attendees at the COP28 summit must commit to reach 100% decarbonised power systems by 2035 for richer economies, and help developing countries financially so they can ditch fossil fuels by 2040 at the latest. "Our businesses are feeling the impacts and cost of increasing extreme weather events resulting from climate change," the companies wrote in the letter, which was coordinated by the non-profit We Mean Business Coalition, which is pushing for greater climate action globally.

"To decarbonise the global energy system, we need to ramp up clean energy as fast as we phase out the use and production of fossil fuels," they wrote. The letter's 131 signatories, which include Bayer, Heineken, IKEA and Iberdrola, span a range of sectors and include multinationals and small and medium-sized businesses. Companies are increasingly committing to their own timelines for reducing their emissions, but many acknowledge that their ability to slow planet-warming CO2 emissions is contingent on faster action from governments.