In a cavernous theater lit up with the green shapes of camels and palms at COP28 in Dubai, ecologist Thomas Crowther, former chief scientific adviser for the United Nations' Trillion Trees Campaign, was doing something he never would have expected a few years ago: begging environmental ministers to stop planting so many trees. From a report: Mass plantations are not the environmental solution they're purported to be, Crowther argued when he took the floor on December 9 for one of the summit's "Nature Day" events. The potential of newly created forests to draw down carbon is often overstated. They can be harmful to biodiversity. Above all, they are really damaging when used, as they often are, as avoidance offsets-- "as an excuse to avoid cutting emissions," Crowther said.

The popularity of planting new trees is a problem -- at least partly -- of Crowther's own making. In 2019, his lab at ETH Zurich found that the Earth had room for an additional 1.2 trillion trees, which, the lab's research suggested, could suck down as much as two-thirds of the carbon that humans have historically emitted into the atmosphere. "This highlights global tree restoration as our most effective climate change solution to date," the study said. Crowther subsequently gave dozens of interviews to that effect. This seemingly easy climate solution sparked a tree-planting craze by companies and leaders eager to burnish their green credentials without actually cutting their emissions, from Shell to Donald Trump. It also provoked a squall of criticism from scientists, who argued that the Crowther study had vastly overestimated the land suitable for forest restoration and the amount of carbon it could draw down. (The study authors later corrected the paper to say tree restoration was only "one of the most effective" solutions, and could suck down at most one-third of the atmospheric carbon, with large uncertainties.)

Crowther, who says his message was misinterpreted, put out a more nuanced paper last month, which shows that preserving existing forests can have a greater climate impact than planting trees. He then brought the results to COP28 to "kill greenwashing" of the kind that his previous study seemed to encourage -- that is, using unreliable evidence on the benefits of planting trees as an excuse to keep on emitting carbon. "Killing greenwashing doesn't mean stop investing in nature," he says. "It means doing it right. It means distributing wealth to the Indigenous populations and farmers and communities who are living with biodiversity."

NASA's Voyager 1 spacecraft is, once again, having trouble transmitting any scientific or systems data back to Earth. "The 46-year-old spacecraft is capable of receiving commands, but a problem seems to have arisen with the probe's computers," reports Space.com. Slashdot readers quonset and ArchieBunker shared the news. From the report: Voyager 1's flight data system (FDS), which collects onboard engineering information and data from the spacecraft's scientific instruments, is no longer communicating as expected with the probe's telecommunications unit (TMU), according to a NASA blog post on Dec. 12. When functioning properly, the FDS compiles the spacecraft's info into a data package, which is then transmitted back to Earth using the TMU. Lately, that data package has been "stuck," the blog post said, "transmitting a repeating pattern of ones and zeros." Voyager's engineering team traced the problem back to the FDS, but it could be weeks before a solution is found. In May 2022, Voyager 1 experienced transmitting issues for several months before a workaround was found. Meanwhile, Voyager 2 experienced an unplanned "communications pause" earlier this year after a routine sequence of commands triggered a 2-degree change in the spacecraft's antenna orientation. This prevented it from receiving commands or transmitting data back to Earth until NASA fixed the issue a week later.

The Economist reports: "Shake, shake, shake, shake," Taylor Swift sings from the stage of Lumen Field in Seattle at 10.35 in the evening on July 22nd. The fans respond, enthusiastically; the stadium duly shakes; a nearby seismometer takes note. To pop aficionados "Shake it off" is an empowering up-tempo anthem played at 160 beats per minute. To the Pacific Northwest Seismic Network, which is designed to monitor earthquakes, it is a 2.6 hertz signal in which the amplitude of the acceleration was as large as one centimetre per second, per second.

The well-situated seismometer first came to public attention in January 2011, when it recorded the response of fans of the Seattle Seahawks, an American football team, to a magnificent touchdown by Marshawn Lynch, a running back known as "Beast Mode." The "Beast Quake" went down in local sporting history. When Ms Swift came to town for two nights of her Eras tour, Jacqueline Caplan-Auerbach, a geology professor at Western Washington University, used the opportunity to learn more about how events in the stadium shake its surroundings. On December 11th she presented some of her conclusions at the American Geophysical Union's autumn meeting in San Francisco.

[...] Dr Caplan-Auerbach wanted to see whether such resonant amplification might also be at play elsewhere, and to distinguish between the effect of the music itself and the audience's response. Her concert-night data showed two distinct sets of signals, one in higher frequencies (30-80hz), one in lower frequencies (1-8hz). The higher-frequency signals were present during the sound check, when the band were on stage but the stadium empty, and absent during the concerts' "surprise songs," played without the band by Ms Swift alone. The lower frequencies were absent when the audience had yet to arrive. Clearly those higher frequencies were from the music itself.

sciencehabit shares a report from Science Magazine: Grunge music: a source of validation for a generation of disaffected youth. And a surprising source of scientific inspiration for Earl Bellinger of the Max Planck Institute for Astrophysics. While listening to Soundgarden's 1994 hit Black Hole Sun 2 years ago, he contemplated a curious question: Might itty-bitty black holes from the dawn of time be lurking in the hearts of giant stars? A new study by Bellinger and colleagues suggests the idea is not so far-fetched. Astronomers could detect these trapped black holes by the vibrations they cause on the star's surface. And if there's enough of them out there, they could function as the mysterious dark matter that holds the universe together.

The researchers found that the black holes would sink to the star's core where hydrogen atoms undergo fusion to produce heat and light. At first, very little would happen. Even a dense stellar core is mostly empty space. The most microscopic of the black holes would have a hard time finding matter to consume and its growth would be extremely slow, Bellinger says. "It could take longer than the lifetime of the universe to eat the star." But larger ones, roughly as massive as the asteroid Ceres or the dwarf planet Pluto, would get bigger on timescales of only a few hundred million years. Material would spiral onto the black hole, forming a disk that would heat up through friction and emit radiation. Once the black hole was about as massive as Earth, it would produce significant amounts of radiation, shining brightly and churning up the star's core like pot of boiling water. "It will become a black hole -- powered object rather than fusion-powered object," says study co-author Matt Caplan, a theoretical physicist at Illinois State University. He and his colleagues have dubbed these entities "Hawking stars."

The European Space Agency's Gaia satellite has spotted about 500 such anomalously cool giant stars, known as red stragglers, Bellinger says. To figure out whether these might actually be hiding a black hole, he says, astronomers could tune in to the particular frequencies at which the stars vibrate. Because a Hawking star would churn throughout its interior, rather than just in the topmost layers like an ordinary red giant, it would be expected to thrum with a particular combination of frequencies. Such waves can be detected in the way the star's light pulses and throbs. Bellinger is applying for funding to study the known red stragglers and see whether any display the characteristic vibrations of a black hole. The study has been published in The Astrophysical Journal.

Scientists are exploring infrasound, low-frequency sound waves produced by tornadoes to develop more accurate early warning systems for these destructive storms. The hope is that eavesdropping on infrasound signals, which travel for hundreds of miles, could provide up to two hours of advance warning. The BBC reports: Scientists have been listening to tornadoes and trying to work out whether they produce a unique sound since the 1970s. Experimental evidence suggests that low-frequency infrasound, with a frequency range of 1-10Hz , is produced while a tornado is taking shape and throughout its life. One recent set of measurements from a tornado near Lakin, Kansas in May 2020 revealed that the twister produced a distinct, elevated signal between 10Hz and 15Hz. In some cases arrays of infrasound detecting microphones have been shown to pick up the noise produced by tornadoes from more than 100km (60 miles) away and have also indicated that the infrasound is produced before tornadogenesis even begins. Researchers hope that by eavesdropping on these noises, it may be possible to not only hear a tornado coming but perhaps even predict them up to two hours before they form.

Since 2020, a team from Oklahoma State University has been testing infrasound's predictive powers using equipment installed in tornado-chasing vehicles. Their portable kit, the Ground-based Local Infrasound Data Acquisition, or "Glinda", system, references a character from The Wizard of Oz. They hope the equipment will help storm chasers to better monitor the development of tornadoes in real time, but requires the equipment to be deployed to the right place at the right time. Some researchers, however, are working on systems that can be left to permanently monitor for tornadoes. One group, led by Roger Waxler, principal scientist at the National Centre for Physical Acoustics (NCPA) based at the University of Mississippi, are planning to deploy four permanent arrays of high-tech sensors in south Mississippi to detect infrasound signals. They hope the system will provide a way of consistently monitoring and detecting tornadoes.

[...] Waxler and his team hope their decade-long experiment will lead to an effective early warning system for tornadoes, particularly when combined with other sources such as doppler radar. "It's not unreasonable that we could localize a tornado to half a football field," adds Waxler. "I envision seeing a map on an app with a dot that shows there's a tornado coming up South Lamar [Avenue, for example]." Warnings have improved in recent decades: from 2003 to 2017, 87% of deadly tornadoes were preceded by an advance warning, but people still have an average of just 10-15 minutes to find shelter. A study based on interviews with 23 survivors of two deadly tornadoes found that people tried to evaluate and respond to the risk of a tornado as the situation evolved, but some did not have a place to shelter easily. Experts believe tornado warnings are too often ignored due to "warning fatigue" created by false alarms and hours of televised storm coverage. One study found 37% of people surveyed did not understand the need for taking precautionary measures during a tornado warning. Waxler hopes that a more accurate early warning system could change the way people respond when they hear a storm is approaching. "Rather than going to hide in your bathtub or cellar, it might be a better idea to get in your car and drive if you know where a tornado is. "The goal is to save lives."

More than 190 governments at the United Nations climate conference approved an agreement Wednesday calling for the world to transition away from fossil fuels, an accord that bridged differences between big energy-producing nations and countries that want to completely phase out coal, oil and natural gas. From a report: The deal, the result of all-night talks, calls for "transitioning away from fossil fuels in energy systems, in a just, orderly and equitable manner." It says the shift to clean energy for the global economy should accelerate this decade with the aim of net-zero greenhouse gas emissions by 2050.

Scientists say that is crucial to fulfilling the Paris accord, the landmark climate agreement that calls for governments to attempt to limit global warming to 1.5 degrees Celsius above preindustrial temperatures. The deal marks the first time a U.N. climate agreement has called for governments to cut back on all fossil fuels.

For the first time, scientists have discovered nuclear fission occurring amongst the stars, supporting the idea that neutron stars create "superheavy" elements when they collide, which then break down via nuclear fission to birth rare elements. Space.com reports: Nuclear fission is basically the opposite of nuclear fusion. While nuclear fusion refers to the smashing of lighter elements to create heavier elements, nuclear fission is a process that sees energy released when heavy elements split apart to create lighter elements. Nuclear fission is pretty well known, too. It's actually the basis of energy-generating nuclear power plants here on Earth -- however, it had not been seen occurring amongst the stars before now.

The team of researchers led by North Carolina State University scientist Ian Roederer searched data concerning a wide range of elements in stars to discover the first evidence that nuclear fission could therefore be acting when neutron stars merge. These findings could help solve the mystery of where the universe's heavy elements come from. Scientists know that nuclear fusion is not just the primary source of energy for stars, but also the force that forges a variety of elements, the "heaviest" being iron.

The evidence of nuclear fission discovered by [Matthew Mumpower, research co-author and a scientist at Los Alamos National Laboratory] and the team comes in the form of a correlation between "light precision metals," like silver, and "rare earth nuclei," like europium, showing in some stars. When one of these groups of elements goes up, the corresponding elements in the other group also increases, the scientists saw. The team's research also indicates that elements with atomic masses -- counts of protons and neutrons in an atomic nucleus -- greater than 260 may exist around neutron star smashes, even if this existence is brief. This is much heavier than many of the elements at the "heavy end" of the periodic table. "The only plausible way this can arise among different stars is if there is a consistent process operating during the formation of the heavy elements," Mumpower said. "This is incredibly profound and is the first evidence of fission operating in the cosmos, confirming a theory we proposed several years ago."

"As we've acquired more observations, the cosmos is saying, 'hey, there's a signature here, and it can only come from fission.'"

The research was published in the journal Science.

Politico reports that the climate bill passed in America in 2022 "has ignited a new zeal among leaders around the world for the kind of winner-picking, subsidy-flush governing that has been out of fashion in many countries for the past 40 years."

The bill's "mix of lavish support for clean energy technologies and efforts to box out foreign competitors is also promoting a kind of green patriotism — and even some politicians on the right, at least outside the U.S., say that's a climate message they can sell." [The bill] is having a real-world impact as investors shift their money to the U.S. from abroad, hungry to take advantage of the tax breaks. In July, for example, Swiss solar manufacturer Meyer Burger canned plans to build a factory in Germany, choosing Arizona instead. That has left political leaders across the world with a choice: Grinch and grumble about the United States' sudden clean industry favoritism, or follow suit... Even the United States' favorite pals on the global stage have felt rattled by the sudden diversion from decades of free trading. But in the U.K., European Union and Australia, many leaders are now working on their own versions.
Some examples of upcoming climate actions:

- Australia's Labor party "has budgeted $1.3 billion in spending this year on green hydrogen projects and around $660 million on moving the economy toward electricity rather than fossil fuels."

- The EU will "start operating a border tariff on high-carbon products in 2026, which seeks to keep hold of its heavy industries even as they pay an increasingly punitive price for polluting to the EU Emissions Trading System."

- The UK Labour party plans messaging "that casts the green energy transition as a national mission which can create jobs in former industrial communities."

- In the U.S. the White House says its bill will spur closer to $700 billion — or even $1 trillion — in green incentives over 10 years. "As the White House sees it, the jump means the tax credits for priorities such as homegrown clean power and electric vehicles have proven more popular than initially anticipated."


Taken together, all the bills "reflect the urgency of the problem," Politico argues, "by aiming to transform the economy at a pace the market can't deliver on its own." "We are in the middle of a climate crisis because firms couldn't do the job of decarbonizing," said Todd Tucker, director of industrial policy and trade at the progressive think tank Roosevelt Institute. "The climate crisis is the world's biggest market failure ever and it's going to take really strong public investment."

An anonymous reader quotes a report from the New York Times: [H]ow do we feed ourselves without further damaging the planet or worsening rising levels of hunger? This year's United Nations climate summit has confronted this question like never before. For the first time there is a broad acknowledgment that the food agenda is aligned with the climate fight across the board," said Ed Davey of the World Resources Institute, who worked with organizers of the summit, known as COP28, on its food agenda. [...] More than two-thirds of the world's countries endorsed an agreement to retool the global food system, though it's vague, lacks concrete targets, and is nonbinding. The United Nations food agency issued a landmark report laying out what it would take to align the global food system with the goal to limit average global temperature rise to manageable levels. The United States and the United Arab Emirates together committed about $17 billion toward agricultural innovations to address climate change. [...]

The F.A.O. road map means doing different things in different countries. In North America, food experts said, it means nudging citizens to eat less meat and dairy, which produce high emissions. In countries of sub-Saharan Africa, it means increasing agricultural productivity. Every country must cut food loss and waste. "We are at this reckoning point where we have to move away from pure awareness raising and actually start changing habits," Yvette Cabrera, a food waste expert at the Natural Resources Defense Council, said.

Road maps, of course, are only that until someone starts following the directions. In this case, that's up to national governments. That's where the Emirates Declaration on Sustainable Agriculture, Resilient Food Systems and Climate Action comes in. It commits countries to including agricultural emissions in their next round of climate targets, in 2025. It contains no other targets or timelines, nor prescribes any specific policies. So far, 154 countries have signed on. India, which has long been sensitive to any global accords that impact food security, was a holdout. One measure of the coming food fight is that it's unclear whether there's any appetite to include agricultural emissions targets in the main agreement, which is the subject of bitter negotiations at the moment. The latest draft does not include them.

Meghan Bartels reports via Scientific American: Some sky watchers this month will witness Betelgeuse, one of the brightest and best-known stars in the sky, nearly disappear. Mere seconds later -- despite astronomers' hopes that the star will meet its explosive end someday soon -- it will return, shining just as brightly as ever. Betelgeuse's brief blip of obscurity will mark a cosmic coincidence: an asteroid will block the star from view over a thin strip of Earth's surface. Scientists are hailing this celestial alignment as a once-in-a-lifetime occasion that, they hope, will permit them to glimpse Betelgeuse's ever changing surface of hot and cold patches in the best resolution to date. The opportunity comes courtesy of a sizable asteroid called Leona, which astronomers first spotted in 1891. On its own, Leona is just another space rock cluttering up the asteroid belt between Mars and Jupiter. But at 8:17 P.M. ET on December 11 Leona will slip directly between Earth and Betelgeuse, a red supergiant star that, unlike the asteroid, has been recognized by countless generations of humans around the world. [...]

To understand how special the event is, consider the total solar eclipse that will occur in April 2024. During the climax of the eclipse, viewers across a narrow strip of Earth's surface will see the moon pass directly in front of the sun. Because the two bodies appear as the same size in our sky, the moon will entirely block the visible disk of the sun and expose the faint, wispy halo called the corona, a layer of our home star's atmosphere that scientists otherwise cannot see from Earth. Similarly, the roughly 40-mile-wide Leona appears in the sky as about the same size as the enormous but very distant Betelgeuse. This will allow the asteroid to block all or most of the star's light when the two bodies perfectly align. But whereas Earth experiences a total solar eclipse every 18 months or so, occultations of bright stars such as Betelgeuse are extremely rare, occurring less than once a century [...].

A draft deal to cut global fossil fuel production is "grossly insufficient" and "incoherent" and will not stop the world from avoiding dangerous climate breakdown, according to delegates at the UN's Cop28 summit. From a report: The text put forward by the summit presidency after 10 days of wrangling was received with concern and anger by many climate experts and politicians, though others welcomed elements of the draft including the first mention in a Cop text of reducing fossil fuel production. Some countries are despairing that the text does not require a full phase-out of fossil fuels.

Cedric Schuster of Samoa, chair of the Alliance of Small Island States, said: "We will not sign our death certificate. We cannot sign on to text that does not have strong commitments on phasing out fossil fuels." The Cop28 presidency released a draft text in the early evening on Monday, which called for "reducing both consumption and production of fossil fuels, in a just, orderly and equitable manner, so as to achieve net zero by, before or around 2050, in keeping with the science."

The text avoids highly contentious calls for a "phase-out" or "phase-down" of fossil fuels, which have been the focus of deep disagreement among the more than 190 countries meeting in Dubai. But instead of requiring fossil fuel producers to cut their output, it frames such reductions as optional, by calling on countries to "take actions that could include" reducing fossil fuels. "That one word 'could' just kills everything," said Eamon Ryan, Ireland's environment minister.

"The machines in the facility waft air towards a water-based solvent," reports the Times of London, "which carbon dioxide in the air dissolves into. An electrical current then separates those compounds from the solvent, creating a pure stream of CO2."

More details from Sky News: The UK's first-ever direct air capture plant has been turned on to remove CO2 from the atmosphere and turn it into jet fuel. The machine, developed by Mission Zero Technologies in partnership with the University of Sheffield, will run on solar power to recover 50 tonnes of CO2 from the air per year and turn it into Sustainable Aviation Fuel (SAF)...

Aviation accounts for about 2% of the world's emissions and Ihab Ahmed, research associate from the University of Sheffield, said the fuel has the capacity to massively reduce the impact of aviation on the environment — and is an important step towards the government's ambitious target to increase the use of SAF to at least 10% by 2030.
America opened its first carbon-capture facility in November in a warehouse in California. While the carbon isn't converted into sustainable air fuel, it can capture a maximum of 1,000 tons of carbon dioxide per year/

Long-time Slashdot reader schwit1 shared an interesting article from ScienceAlert: Undersea volcanic eruptions account for more than three-quarters of all volcanism on Earth, but rarely do we see the impacts. The Hunga Tonga-Hunga Ha'apai eruption of 2022 was a dramatic exception. Its furious explosion from shallow waters broke the ocean surface and punched through the stratosphere, generating supercharged lighting and an atmospheric shock wave that circled the globe several times.

But there was far more to the fallout than satellite images could possibly capture or observers could report. We know the human toll this explosion took, but now a new study investigating the underwater impacts of the Hunga-Tonga eruption has detailed just how ferociously the explosion tore open the seafloor, ripped up undersea cables, and smothered marine life... The team also compiled a trove of data from ship-based sonar, sediment cores, geochemical analyses, water column samples, and video footage to chart the devastatingly powerful upheaval...

Their analyses show at least 6 cubic kilometers (km3) of seafloor was lost from within the caldera — 20 times the eruptive volume of the 1980 Mount St. Helens eruption — and an additional 3.5 km3 of material was blasted out of the Hunga volcano's submerged flanks... That leaves roughly four-fifths of the ejected material in the ocean; material that was funneled into fast-moving density flows that scoured out tracks 30 meters deep in the seafloor and accumulated 22 meters (72 feet) thick in some places.

"U.S. lawmakers and ministers from around the world blasted a letter that emerged Friday night, warning OPEC member states to resist calls at the COP28 climate summit for a fossil fuel phase-out," reports Axios: The letter has shaken up the climate talks in a critical phase, as nations spar over whether to include historic language in an emerging climate agreement that calls for a phase-out of fossil fuels... "OPEC's letter is outrageous. OPEC wants to talk about emissions, but not the source of the emissions," said Sen. Ed Markey (D-MA), who is visiting COP28 as part of a congressional delegation. "It would be like the tobacco industry saying you can talk about lung cancer, but you can't talk about cigarettes. It's outrageous, it's preposterous," he told Axios. "The extent to which they had the nerve to write such a preposterous letter, just shows you how much in denial they still are." The letter, reportedly sent by the OPEC secretary general to all 13 member nations and 10 members of the larger OPEC+ coalition on Dec. 6, warned of the possibility of a tipping point toward a COP28 outcome containing language calling for a phase-out of fossil fuels.
Reuters reports that "It was the first time OPEC's Secretariat has intervened in the U.N. climate talks with such a letter, according to Alden Meyer of the E3G climate change think tank. 'It indicates a whiff of panic,' he said."

More from Politico: The full-scale resistance that oil-exporting countries are mounting against a COP28 deal to end fossil fuel use is a sign of "panic," said Germany's climate envoy... [T]o Jennifer Morgan, Germany's special envoy for international climate action, the letter was also a rare admission from the oil industry that these climate talks pose an existential threat to its business model...

As the talks speed toward a close, officials are working to craft language that can get support from the nearly 200 countries participating in the process. It will be up to the UAE presidency of COP28 to attempt to find consensus. Draft text over the weekend offered several options for a pledge to "phase out" fossil fuels, all with various caveats. But several people close to the talks said that Saudi Arabia and the Arab group of negotiators have resisted such language, including storming out of one meeting room, according to one observer of the process granted anonymity to discuss the closed-door talks.

"We have raised our consistent concerns with attempts to attack energy sources instead of emissions," Saudi Arabia's Albara Tawfiq said during Sunday's public session.
The Guardian adds that "there is some optimism coming from the discussions." Catherine Abreu, the executive director of Destination Zero, said: "In eight years of attending climate talks, I have never felt more that we were talking about what really matters. Hearing ministers from all around the world talk straight about the realities of phasing out fossil fuels is something I could not have imagined happening in this process even two years ago. "What's clear after this Majlis dialogue at Cop28 is that there is overwhelming consensus that phasing out fossil fuels and scaling up renewable energy is absolutely necessary to hold to the promise of the Paris Agreement and keep the hope of 1.5 alive.

"A tomato lost for eight months on the orbiting lab has been located, " reports Gizmodo, "absolving astronaut Frank Rubio of playful allegations that he ate it." NASA's Veg-05 experiment, a project focusing on growing fruits and vegetables in space, experienced an unusual turn of events when a Red Robin dwarf tomato vanished shortly after being harvested in March. This tomato, part of a study to explore the feasibility of continuous fresh-food production in space, was finally found, NASA astronaut Jasmin Moghbeli revealed during a livestream on December 6...

The Veg-05 project expanded the scope of in-space farming to include dwarf tomatoes, exploring how lighting and fertilizer variations influence fruit growth, safety, and nutritional value (and yes, tomatoes are fruits, not vegetables)... Following the harvest in March, each astronaut received a tomato sample stored in a Ziploc bag. However, concerns about potential fungal contamination led NASA to instruct the astronauts not to consume the fruit, as Space.com reported.

News of the missing tomato first emerged on September 13, during an event commemorating Rubio's one-year stay in orbit. Rubio, who had an extended mission on the ISS due to a malfunctioning Russian Soyuz spacecraft, lamented the loss of his tomato share, which had floated away before he could take a bite. Rubio, who spent a record 371 days in space, mused about the missing tomato, saying: "I spent so many hours looking for that thing. I'm sure the desiccated tomato will show up at some point and vindicate me, years in the future."
In the livestream Moghbeli "did not specify where on the 356-foot space station the one-inch-wide red dwarf tomato was located," notes the Guardian, "or in what condition." The Rubio tomato turned out to be one of only 12 red dwarves successfully germinated and grown to ripeness in space during the Veg-05 project, compared with more than 100 in a parallel experiment conducted on Earth, according to NASA.
Thanks to Slashdot reader christoban for sharing the news.

"The United States military is preparing to launch its secretive X-37B space plane on a seventh mission in orbit," reports NBC News.

Shaped like a small space shuttle, "It's an itty-bitty spaceplane, not quite 30 feet long and under 10 feet tall," writes the Washington Post, "with a pair of stubby wings and a rounded, bulldog-like nose." Space.com says the launch window for the uncrewed vehicle opens Monday at 8:14 p.m. EST.

From NBC News: For the first time, the X-37B will ride into orbit atop a SpaceX Falcon Heavy rocket. Since its debut more than a decade ago, the X-37B has been a source of intrigue within the space community, mostly owing to the mysterious nature of its activities in low Earth orbit. Despite not knowing its true purpose or location, skywatchers have occasionally spotted and photographed the space plane in the night sky using telescopes... The military is tight-lipped about such operations, but the Space Force said the X-37B missions "are key to ensuring safe and responsible operations in space for all users of the space domain..."
The "U.S. Space Force says that launching on SpaceX's Falcon Heavy rocket will allow testing "in new orbital regimes, experimenting with space domain awareness technologies and investigating the radiation effects to NASA materials."

The Washington Post notes that "The reference about 'space domain awareness' could mean that it will be keeping an eye on other satellites, potentially watching for threats": At least one part of the mission is known. The vehicle will "expose plant seeds to the harsh radiation environment of long-duration spaceflight" in an experiment for NASA. In the past, the Pentagon has also used the X-37B to test some of its cutting edge technologies, including a small solar panel designed to transform solar energy into microwaves, a technology that one day could allow energy harnessed in space to be beamed back to Earth...

If Sunday's X-37B mission is like previous ones, the spaceplane could be in space for a while. Its first flight, which launched in 2010, lasted 224 days.

Record-breaking land and sea temperatures, driven by climate breakdown, will probably cause "unprecedented mass coral bleaching and mortality" throughout 2024, according to a pioneering coral scientist. From a report: The impact of climate change on coral reefs has reached "uncharted territory," said Prof Ove Hoegh-Guldberg, from the University of Queensland, Australia, leading to concerns that we could be at a "tipping point."

The upper ocean is undergoing unmatched changes in conditions, ecosystems and communities that can be traced back to the 1980s, when mass coral bleaching first appeared. In a paper published in the journal Science, US and Australian researchers say that historical data on sea surface temperatures, over four decades, suggests that this year's extreme marine heatwaves may be a precursor to a mass bleaching and coral mortality event across the Indo-Pacific in 2024-25.

Mass coral bleaching happens when delicate corals become stressed due to factors including heat, causing them to lose their brown microbial algae, turning them white. At low stress levels, the algae can return to corals over a few months. But many Caribbean reef areas have recently experienced historically high sea temperatures that began one or two months earlier and lasted longer than usual. Crucially, 2023 is the first year of a potential pair of El Nino years, with the warmest average global surface sea temperature from February to July on record. Since 1997, every instance of these El Nino pairs has led to a global mass coral bleaching event.

WindBourne shares a report: Global carbon emissions from fossil fuels reached record levels again in 2023, as experts warned that the projected rate of warming had not improved over the past two years. The world is on track to have burned more coal, oil and gas in 2023 than it did in 2022, according to a report by the Global Carbon Project, pumping 1.1% more planet-heating carbon dioxide into the atmosphere at a time when emissions must plummet to stop extreme weather from growing more violent.

The finding comes as world leaders meet in Dubai for the fraught Cop28 climate summit. In a separate report published on Tuesday, Climate Action Tracker (CAT) raised its projections slightly for future warming above the estimates it made at a conference in Glasgow two years ago. As carbon clogs the atmosphere, trapping sunlight and baking the planet, the climate is growing more hostile to human life. The growth in CO2 emissions had slowed substantially over the past decade, the Global Carbon Project found, but the amount emitted each year had continued to rise. It projected that total CO2 emissions in 2023 would reach a record high of 40.9 gigatons. If the world continued to emit CO2 at that rate, the international team of more than 120 scientists found, it would burn through the remaining carbon budget for a half-chance of keeping global heating to 1.5C (2.7F) above pre-industrial temperatures in just seven years. In 15 years, the scientists estimated, the budget for 1.7C would be gone too.

India wants to be the voice of the global south in the negotiations. But can the world's most populous nation cut its massive coal use? From a report: India is pitching itself as a leader of the global south at the 28th United Nations Climate Change Conference (COP28), under way in Dubai. During his opening speech at the meeting, Indian Prime Minister Narendra Modi issued a sharp rebuke to wealthy nations: "A small section of mankind has exploited nature indiscriminately. But the whole of humanity is paying its price, especially the residents of the global south." But India -- now the world's most populous nation -- relies heavily on coal to meet its energy needs, and faces a difficult path to cutting its emissions to net zero. The country's priority remains reducing poverty -- which India says requires more energy use -- but more action on climate change is essential, say researchers.

"If we have to reach net-zero by 2050 collectively, then India's share in that collective goal should be a significant one," says Nandini Das, a climate researcher based in Perth, Australia, who works for the global research group Climate Action Tracker. But she adds that in terms of finance, "India requires substantial international support." India is the world's third biggest carbon producer, accounting for 7.3% of global greenhouse-gas emissions in 2022. But those emissions come from 1.43 billion people, accounting for 18% of the world's population. India's per capita emissions last year were equivalent to 2.76 tonnes of carbon dioxide, less than one-sixth of the per capita emissions of the United States and 24 times smaller than the figure for Qatar, the world's largest per capita emitter.
India's average standard of living is far below those of the United States and Qatar, with 210 million people living in poverty according to United Nations metrics. India has maintained that coal -- a cheap fossil fuel readily available in the country -- is required to power its economic development. Coal supplied 73% of India's electricity in 2022; and in November this year, the country announced that it would install 80 gigawatts of new coal-fired power-generation capacity by 2032. "We have to give a fair share to all developing countries in the global carbon budget," Modi said at COP28.

Many of the gravest threats to humanity are drawing closer, as carbon pollution heats the planet to ever more dangerous levels, scientists have warned. From a report: Five important natural thresholds already risk being crossed, according to the Global Tipping Points report, and three more may be reached in the 2030s if the world heats 1.5C (2.7F) above pre-industrial temperatures. Triggering these planetary shifts will not cause temperatures to spiral out of control in the coming centuries but will unleash dangerous and sweeping damage to people and nature that cannot be undone.

"Tipping points in the Earth system pose threats of a magnitude never faced by humanity," said Tim Lenton, from the University of Exeter's Global Systems Institute. "They can trigger devastating domino effects, including the loss of whole ecosystems and capacity to grow staple crops, with societal impacts including mass displacement, political instability and financial collapse." The tipping points at risk include the collapse of big ice sheets in Greenland and the West Antarctic, the widespread thawing of permafrost, the death of coral reefs in warm waters, and the collapse of one atmospheric current in the North Atlantic.