For the first time, scientists say they've detected water molecules on the surface of an asteroid. Space.com reports: Scientists studied four silicate-rich asteroids using data gathered by the now-retired Stratospheric Observatory for Infrared Astronomy (SOFIA), a telescope-outfitted plane operated by NASA and the German Aerospace Center. Observations by SOFIA's Faint Object InfraRed Camera (FORCAST) instrument showed that two of the asteroids -- named Iris and Massalia -- exhibit a specific wavelength of light that indicated the presence of water molecules at their surface, a new study reports.

While water molecules have previously been detected in asteroid samples returned to Earth, this is the first time that water molecules have been found on the surface of an asteroid in space. In a previous study, SOFIA found similar traces of water on the surface of the moon, in one of the largest craters in its southern hemisphere. [...]

Therefore, the findings at Iris and Massalia suggest that some silicate asteroids can conserve some of their water over the eons and may be more commonly found in the inner solar system than previously thought. In fact, asteroids are believed to be the primary source of Earth's water, providing the necessary elements for life as we know it. Understanding of the distribution of water through space will help researchers better assess where to search for other forms of potential life, both in our solar system and beyond. The findings have been published in The Planetary Science Journal.

According to NASA, the OSIRIS-REx mission has successfully collected 121.6 grams, or almost 4.3 ounces, of rock and dust from the asteroid Bennu. Universe Today reports: These samples have been a long time coming. The OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer) was approved by NASA back in 2011 and launched in September 2016. It reached its target, the carbonaceous Apollo group asteroid 101955 Bennu, in December 2018. After spending months studying the asteroid and reconnoitring for a suitable sampling location, it selected one in December 2019. After two sampling rehearsals, the spacecraft gathered its sample on October 20th, 2020. In September 2023, the sample finally returned to Earth.

For OSIRIS-REx to be successful, it had to collect at least 60 grams of material. With a final total that is double that, it should open up more research opportunities and allow more of the material to be held untouched for future research. NASA says they will preserve 70% of the sample for the future, including for future generations. The next step is for the material to be put into containers and sent to researchers. More than 200 researchers around the world will receive samples. Many of the samples will find their way to scientists at NASA and institutions in the US, while others will go to researchers at institutions associated with the Canadian Space Agency, JAXA, and other partner nations. Canada will receive 4% of the sample, the first time that Canada's scientific community will have direct access to a returned asteroid sample.

Dumping chemicals in the ocean? Spraying saltwater into clouds? Injecting reflective particles into the sky? Scientists are resorting to once unthinkable techniques to cool the planet because global efforts to check greenhouse gas emissions are failing. From a report: These geoengineering approaches were once considered taboo by scientists and regulators who feared that tinkering with the environment could have unintended consequences, but now researchers are receiving taxpayer funds and private investments to get out of the lab and test these methods outdoors. The shift reflects growing concern that efforts to reduce greenhouse gas emissions aren't moving fast enough to prevent the destructive effects of heat waves, storms and floods made worse by climate change. Geoengineering isn't a substitute for reducing emissions, according to scientists and business leaders involved in the projects. Rather, it is a way to slow climate warming in the next few years while buying time to switch to a carbon-free economy in the longer term.

Three field experiments are under way in the U.S. and overseas. This month, researchers aboard a ship off the northeastern coast of Australia near the Whitsunday Islands are spraying a briny mixture through high-pressure nozzles into the air in an attempt to brighten low-altitude clouds that form over the ocean. Scientists hope bigger, brighter clouds will reflect sunlight away from the Earth, shade the ocean surface and cool the waters around the Great Barrier Reef, where warming ocean temperatures have contributed to massive coral die-offs. The research project, known as marine cloud brightening, is led by Southern Cross University as part of the $64.55 million, or 100 million Australian dollars, Reef Restoration and Adaptation Program. The program is funded by the partnership between the Australian government's Reef Trust and the Great Barrier Reef Foundation and includes conservation organizations and several academic institutions.

An anonymous reader shares a report: When California state legislators passed a 2014 law banning single-use plastic bags, the hope was that it would notably reduce the amount of discarded plastic. But fast-forward nearly a decade: Californians are tossing more pounds of plastic bags than before the legislation was passed. That's according to a recent report by the consumer advocacy group CALPIRG, which took population changes into account and found the tonnage of discarded bags rose from 4.08 per 1,000 people in 2014 to 5.89 per 1,000 people in 2022. How could this happen?

As Susanne Rust reported this week, plastic bag manufacturers replaced one kind of plastic bag for another. You've probably noticed them at grocery stores or had them loaded into your car during a drive-up order. These newer bags are thicker and meet technical specifications to be called "reusable." As Jenn Engstrom, CALPIRG'S state director, explained to Susanne, the switch created a loophole because the newer bags -- which typically cost 10 cents -- "are clearly not being reused and don't look like reusable bags and ... just circumvent the law's intent." The pandemic was also a contributing factor. COVID restrictions led many to get groceries, restaurant dishes and other products delivered to our doors, often in thick plastic bags.

There's an effort to close the loophole, though. New legislation is being proposed that would also ban the thicker plastic bags from grocery and large retail stores. Clearly, not enough consumers have changed their plastic bag habits at the checkout stand. But the onus isn't on individuals. Plastic manufacturers create these products. Businesses buy the bags so customers have somewhere to put the goods they buy from businesses. [...] Under the new law, at least 30% of plastic items sold, distributed or imported into California must be recyclable by Jan. 1, 2028. It also stipulates that single-use plastic waste be reduced 25% by 2032. But as Susanne pointed out, plastics companies will have notable oversight and authority over the program "via a Producer Responsibility Organization, which will be made up of industry representatives."

Now that it can be strapped to our faces and worn to strange places, opinions about Apple's Vision Pro are flying left and right. Entering the chat is Meta CEO Mark Zuckerberg, who has more at stake than perhaps anyone on earth if Apple does to headsets what the iPhone did to smartphones. From a report: In a video posted to his Instagram account on Tuesday, Zuckerberg gives his official verdict on the Vision Pro versus his company's latest Quest 3 headset: "I don't just think that Quest is the better value, I think Quest is the better product, period." While being filmed by the Quest 3's video passthrough system in his living room, Zuckerberg highlights the tradeoffs Apple made to get the fanciest display possible into something that can be worn on your head in an acceptable form factor. He says the Quest 3 weighs 120 grams less, making it more comfortable to wear for longer. He also says it allows for greater motion due to its lack of a wired battery pack and wider field of view than the Vision Pro.

He thinks the Quest's option of physical hand controllers and hand tracking for input is better, though he says he's a fan of eye tracking for some use cases and teases that it will return to future Meta headsets after debuting in the Quest Pro. He says the Quest has a better "immersive" content library than Apple, which is technically true for now, though he admits that the Vision Pro is a better entertainment device. And then there's the fact that the Quest 3 is, as Zuck says, "like seven times less expensive."

An anonymous reader shared this report from the Associated Press: An abrupt shutdown of Atlantic Ocean currents that could put large parts of Europe in a deep freeze is looking a bit more likely and closer than before as a new complex computer simulation finds a "cliff-like" tipping point looming in the future. A long-worried nightmare scenario, triggered by Greenland's ice sheet melting from global warming, still is at least decades away if not longer, but maybe not the centuries that it once seemed, a new study in Friday's Science Advances finds.

The study, the first to use complex simulations and include multiple factors, uses a key measurement to track the strength of vital overall ocean circulation, which is slowing. A collapse of the current — called the Atlantic Meridional Overturning Circulation or AMOC — would change weather worldwide because it means a shutdown of one of key the climate and ocean forces of the planet. It would plunge northwestern European temperatures by 9 to 27 degrees (5 to 15 degrees Celsius) over the decades, extend Arctic ice much farther south, turn up the heat even more in the Southern Hemisphere, change global rainfall patterns and disrupt the Amazon, the study said. Other scientists said it would be a catastrophe that could cause worldwide food and water shortages.

"We are moving closer (to the collapse), but we we're not sure how much closer," said study lead author Rene van Westen, a climate scientist and oceanographer at Utrecht University in the Netherlands. "We are heading towards a tipping point." When this global weather calamity — grossly fictionalized in the movie "The Day After Tomorrow" — may happen is "the million-dollar question, which we unfortunately can't answer at the moment," van Westen said. He said it's likely a century away but still could happen in his lifetime. He just turned 30.

"It also depends on the rate of climate change we are inducing as humanity," van Westen said.

Thursday a climate technology startup called Twelve "took a major step toward producing sustainable aviation fuel..." reports Bloomberg, "by launching its commercial-scale carbon transformation unit." Twelve is among the emerging companies working on ways to transform captured CO2 into useful products. In the case of the Berkeley, California-based startup, its nascent technology will be critical to cleaning up one of the hardest-to-decarbonize sectors: aviation. Twelve uses a technique called electrolysis that uses electricity to repurpose carbon dioxide and water into various products. When the electricity is generated from renewables, the process is essentially no-carbon. The company's CO2 electrochemical reactor — called OPUS — will be at the center of its first commercial production plant for sustainable aviation fuel, under construction in Moses Lake and set to be completed this year. The plant will run on hydropower and use CO2 captured from a nearby ethanol plant. That CO2 and water will be fed through OPUS and turned into synthetic gas, the basis of sustainable aviation fuel.

Twelve's airline customers can blend it with traditional jet fuel. The resulting carbon credit can be bought by corporate customers like Microsoft to offset their business travel-related emissions...

Although Twelve's carbon transformation technology can be used to make products ranging from spandex pants to car parts, it pivoted to focus more fully on sustainable aviation fuel after the announcement of tax credits for SAF blending, carbon capture and utilization, and hydrogen production, said Twelve co-founder and Chief Science Officer Etosha Cave. Those tax credits helped the company launch this commercial unit. "Without that, we would not be competitive in terms of being able to get to market at the stage we're at," Cave said.
It's still not cost competitive with traditional jet fuel, the article points out, "but airlines are under increasing pressure from governments and their own net zero commitments to integrate SAF into their fuel mix.

"Twelve would not disclose its cost to make the fuel, though it said it expects prices to go down as its technology scales up and eventually reach parity with traditional jet fuel."

Earth had its first year-long, 1.5-degree rise in temperature. But does this mean we've already missed our goal of limiting temperature increases to 1.5 degrees?

No, argues the Washington Post: There's actually some disagreement about what exactly counts as breaching that threshold — but scientists and policymakers agree that it has to be a multiyear average, not a single 12-month period. Scientists estimate that without dramatic emissions reductions, that will happen sometime in the 2030s. But there could be other single years or 12-month periods that cross the line before then.

Can we still avoid passing 1.5C?

Most scientists say passing 1.5C is inevitable. "The 1.5-degree limit is deader than a doornail," Columbia University climate scientist James Hansen said in a call with reporters late last year.... The Washington Post analyzed 1,200 modeled pathways for the world to shift to clean energy and found that only four of them showed the world hitting the 1.5C target without substantially overshooting or using speculative technology (like large-scale carbon capture) that doesn't yet exist. At this point, many experts believe that the economy is too stuck on fossil fuels to transition fast enough for 1.5 degrees.

Does that mean we'll pass catastrophic tipping points?

That's a more difficult question. Scientists don't know exactly when certain tipping points — like the collapse of the Greenland ice sheet or the release of greenhouse gases from thawing permafrost — will occur. It's very hard to predict and model these types of catastrophic changes. And 1.5C isn't a magic threshold; it's not as though as soon as we pass that number, Antarctic ice sheets will collapse and ocean circulations will grind to a halt. But one thing is certain: For every tenth of a degree of warming, tipping points are more likely. Two degrees is worse than 1.9 degrees, which is worse than 1.8 degrees, and so on.

And at each tenth of a degree, the infrastructure and systems that the world has built — electric grids, homes, livelihoods — will become more strained. Our modern world simply was not designed for temperatures this high. At some level, the final temperature of the planet isn't what matters most. It's where countries can actually get carbon emissions to zero — and stop contributing to future warming altogether.

The world's biggest builder of recycling plants has teamed with a startup to install AI-powered systems for sorting recycling, reports the Washington Post. And now over the next few years, "The companies plan to retrofit thousands of recycling facilities around the world with computers that can analyze and identify every item that passes through a waste plant, they said Wednesday." "[S]orted" recyclables, particularly plastic, wind up contaminated with other forms of trash, according to Lokendra Pal, a professor of sustainable materials engineering at North Carolina State University... [W]aste plants don't catch everything. [AI startup] Greyparrot has already installed over 100 of its AI trash spotters in about 50 sorting facilities around the world, and [co-founder Ambarish] Mitra said as much as 30 percent of potentially recyclable material winds up getting lumped in with the trash that's headed for the landfill. Failing to recycle means companies have to make more things from scratch, including a lot of plastic from fossil fuels. Also, more waste ends up in landfills and incinerators, which belch greenhouse gases into the atmosphere and pollute their surroundings.

Mitra said putting Greyparrot's AI tools in thousands of waste plants around the world can raise the percentage of glass, plastic, metal and paper that makes it to recycling facilities. "If we can move the needle by even 5 to 10 percent, that would be a phenomenal outcome on a planetary basis for greenhouse gas emissions and environmental impact," he said. Cutting contamination would make recycled materials more valuable and raise the chances that companies would use them to make new products, according to Reck. "If the AI and the robots potentially helped to increase the quality of the recycling stream, that's huge," she said...

Greyparrot's device is, basically, a set of visual and infrared cameras hooked up to a computer, which monitors trash as it passes by on a conveyor belt and labels it under 70 categories, from loose bottle caps (not recyclable!) to books (sometimes recyclable!) to aluminum cans (recyclable!). Waste plants could connect these AI systems to sorting robots to help them separate trash from recyclables more accurately. They could also use the AI as a quality control system to measure how well they're sorting trash from recyclables. That could help plant managers tinker with their assembly lines to recover more recyclables, or verify that a bundle of recyclables is free of contaminants, which would allow them to sell for a higher price.
GreyParrot's co-founder said their trash-spotting computers "could one day help regulators crack down on companies that produce tsunamis of non-recyclable packaging," according to the article.

"The AI systems are so accurate, he said, that they can identify the brands on individual items. 'There could be insights that make them more accountable for ... the commitments they made to the public or to shareholders,' he said."

NASA's nearly $1 billion PACE mission launched atop a SpaceX Falcon 9 rocket early this morning, successfully making it to polar orbit -- a first for NASA since 1960. "When it's up and running, PACE will make key observations of Earth's atmosphere and climate and allow scientists to assess the health of our oceans like never before," notes Space.com. From the report: PACE, by the way, is the first U.S. government mission to launch to a polar orbit from Florida since Nov. 30, 1960. On that day, a Thor Able Star rocket took off on such a trajectory but failed, raining debris down on Cuba, some of which apparently killed a cow. Rather than risk further incidents, the U.S. decided to conduct all of its subsequent polar launches from Vandenberg Air Force Base (now Vandenberg Space Force Base) in California -- until now. That said, PACE wasn't the first mission of any type to launch to polar orbit from Florida's Space Coast in six decades: SpaceX had completed 11 such commercial missions before sending PACE on its way.

PACE's handlers will now work to get the 10.5-foot-long (3.2 meters) spacecraft and its various subsystems up to speed. After this checkout period, the satellite can begin its science work. That work will be done by three instruments. One of them, a spectrometer called the Ocean Color Instrument (OCI), will map out the ocean's many hues in great detail and an unprecedented range, from near-infrared wavelengths all way to the ultraviolet. These colors are determined by the interaction of sunlight with particles in seawater, such as the chlorophyll produced by photosynthetic plankton, the base of the marine food web. So OCI will reveal quite a bit about the health and status of ocean ecosystems, according to PACE team members.

"PACE's unprecedented spectral coverage will provide the first-ever global measurements designed to identify phytoplankton community composition," NASA officials wrote in a PACE mission description. "This will significantly improve our ability to understand Earth's changing marine ecosystems, manage natural resources such as fisheries and identify harmful algal blooms." The satellite's other two instruments are polarimeters. They'll measure how the oscillation of light in a plane, known as its polarization, is affected by passage through the ocean, clouds and aerosols (particles suspended in the atmosphere). "Measuring polarization states of UV-to-shortwave light at various angles provides detailed information on the atmosphere and ocean, such as particle size and composition," NASA officials wrote in the mission description.

An anonymous reader quotes a report from the BBC: For the first time, global warming has exceeded 1.5C across an entire year, according to the EU's climate service. World leaders promised in 2015 to try to limit the long-term temperature rise to 1.5C, which is seen as crucial to help avoid the most damaging impacts. This first year-long breach doesn't break that landmark Paris agreement, but it does bring the world closer to doing so in the long-term.

Urgent action to cut carbon emissions can still slow warming, scientists say. "This far exceeds anything that is acceptable," Prof Sir Bob Watson, a former chair of the UN's climate body, told the BBC Radio 4's Today Program. "Look what's happened this year with only 1.5C -- we've seen floods, we've seen droughts, we've seen heatwaves and wildfires all over the world." The period from February 2023 to January 2024 reached 1.52C of warming, according to the EU's Copernicus Climate Change Service. The following graph [here] shows how that compares with previous years.

The world's sea surface is also at its highest ever recorded average temperature -- yet another sign of the widespread nature of climate records. As the chart [here] shows, it's particularly notable given that ocean temperatures don't normally peak for another month or so. Science groups differ slightly on precisely how much temperatures have increased, but all agree that the world is in by far its warmest period since modern records began -- and likely for much longer.

James Felton reports via IFL Science: One of the deepest metal mines in Europe -- the Pyhasalmi Mine in central Finland -- is to be turned into an enormous gravity battery capable of storing 2 megawatts of energy. [...] Despite the cool name, the idea behind gravity batteries is really simple. During times when energy sources are producing more energy than the demand, the excess energy is used to move weights (in the form of water or sometimes sand) upwards, turning it into potential energy. When the power supply is low, these objects can then be released, powering turbines as our good friend (and deadly enemy) gravity sends them towards the Earth.

Though generally gravity batteries take the form of reservoirs, abandoned mines moving sand or other weights up when excess power is being produced have also been suggested. Scottish company Gravitricity created a system of winches and hoists that can be installed in such disused mineshafts. The company will install the system in the 1,400-meter-deep (4,600 feet) zinc and copper mine in Pyhajarvi, Finland. "A study last year by the International Institute for Applied Systems Analysis (IIASA) estimated that gravity batteries in abandoned underground mines could store up to 70TWh of energy -- enough to meet global electricity demands," reports The Independent. "The repurposed mines could also provide economic benefits to the communities that previously relied on the mine for their livelihoods."

The U.S. Environmental Protection Agency (EPA) today unveiled new, stricter limits for PM2.5 (particulate smaller than 2.5 micrometers in diameter), commonly referred to as soot. As NPR notes, these particles are are "one of the deadliest types of air pollution." From the report: The agency lowered the allowable limit for annual PM2.5 levels from 12 micrograms per cubic meter to 9. That's a "significant reduction," says Regan Patterson, an air pollution expert at the University of California, Los Angeles. "The science is clear," says EPA Administrator Michal Regan. "Soot pollution is one of the most dangerous forms of air pollution and is linked to a range of serious and potentially deadly illnesses, including asthma and heart attacks."

The new standard represents the first tightening of the rules since 2012, but states will have several years to reach the new limits. The EPA left the daily limits on PM2.5 pollution unchanged, at 35 micrograms per cubic meter, saying the same efforts that will reduce pollution under the revised annual standard will drive down short-term pollution exposures as well. Decades of research have demonstrated that tiny particles are dangerous to people's health at nearly any concentration. The sources vary: fossil fuel combustion, agriculture, and industrial processes all add to the load, as does wildfire smoke and dust.

In aggregate, the tiny particles drive millions of premature deaths worldwide each year. The EPA estimates that the new, tighter standards will prevent about 4,500 premature deaths a year by 2032 in the U.S. and prevent about 800,000 asthma-related emergency visits. It estimates the lower pollution exposures could reduce healthcare costs by about $46 billion by that time.

The farmers' protests in Europe are a harbinger of the next big political challenge in global climate action: How to grow food without further damaging Earth's climate and biodiversity. From a report: On Tuesday, after weeks of intense protests in several cities across the continent, came the most explicit sign of that difficulty. The European Union's top official, Ursula von der Leyen, abandoned an ambitious bill to reduce the use of chemical pesticides and softened the European Commission's next raft of recommendations on cutting agricultural pollution. "We want to make sure that in this process, the farmers remain in the driving seat," she said at the European Parliament. "Only if we achieve our climate and environmental goals together will farmers be able to continue to make a living."

The farmers argue they're being hit from all sides: high fuel costs, green regulations, unfair competition from producers in countries with fewer environmental restrictions. Nonetheless, agriculture accounts for 30 percent of global greenhouse gas emissions, and it's impossible for the European Union to meet its ambitious climate targets, enshrined in law, without making dramatic changes to its agricultural system, including how farmers use chemical pesticides and fertilizers, as well as its vast livestock industry. It also matters politically. Changing Europe's farming practices is proving to be extremely difficult, particularly as parliamentary elections approach in June. Farmers are a potent political force, and food and farming are potent markers of European identity. Agriculture accounts for just over 1 percent of the European economy and employs 4 percent of its population. But it gets one-third of the E.U. budget, mostly as subsidies.

Last June, Harvard professor Avi Loeb said he may have found fragments of alien technology from a meteor that landed in the waters off of Papua, New Guinea in 2014. "Since then, several researchers unrelated to the expedition have pushed back on his analysis," reports Boston Public Radio. "One October 2023 paper deemed the spherules were made by human-produced coal ash." Now, Loeb has published new findings that he claims debunk that theory.

"What we did is compare 55 elements from the periodic table in coal ash to those special spherules that we found," Loeb said. "And it's clearly very different." From the report: He said his work follows the scientific method: collecting materials, analyzing them and following the evidence. "It's not based on opinions," Loeb said. "And, of course, if you're not part of this scientific process and you are jealous of the attention that it gets, then you can raise a lot of criticism." When asked how he deals with that criticism, he said that, "by now, my skin turned into titanium." [...]

He believes more observatories should be built to expand on research of what's passing through closer to Earth, since astronomers are often fixated on faraway objects. "The best approach to figure it out is actually to do the scientific work of building observatories that look out and check what these objects are," Loeb said. "And if they happen to be birds, or airplanes, or Chinese balloons, so be it. We can move on after that. But we need to figure it out, it's our civil duty as scientists. "The universe is so vast that, rather than keep telling ourselves that there is nothing like us, we should search for it," he added.

Russian cosmonaut Oleg Kononenko set a world record for total time spent in space, "surpassing his compatriot Gennady Padalka who logged more than 878 days in orbit," reports Reuters. From the report: At 0830 GMT Kononenko broke the record, Roscosmos said. Kononenko is expected to reach a total of 1,000 days in space on June 5 and by late September he will have clocked 1,110 days. "I fly into space to do my favourite thing, not to set records," Kononenko told TASS in an interview from the International Space Station (ISS) where he is orbiting about 263 miles (423 km) from the earth. "I am proud of all my achievements, but I am more proud that the record for the total duration of human stay in space is still held by a Russian cosmonaut." The 59-year-old took the top spot from Padalka, who accumulated a total of 878 days, 11 hours, 29 minutes and 48 seconds, Roscosmos said.

Kononenko said that he worked out regularly to counter the physical effects of "insidious" weightlessness, but that it was on returning to earth that the realisation came of how much life he had missed out on. "I do not feel deprived or isolated," he said. "It is only upon returning home that the realisation comes that for hundreds of days in my absence the children have been growing up without a papa. No one will return this time to me." He said cosmonauts could now use video calls and messaging to keep in touch with relatives but getting ready for each new space flight became more difficult due to technological advances.

"The profession of a cosmonaut is becoming more complicated. The systems and experiments are becoming more complicated. I repeat, the preparation has not become easier," he said. Kononenko dreamed of going to space as a child and enrolled in an engineering institute, before undergoing cosmonaut training. His first space flight was in 2008. His current trip to the ISS launched last year on a Soyuz MS-24.

Julia Simon reports via NPR: In a D.C. courtroom, a trial is wrapping up this week with big stakes for climate science. One of the world's most prominent climate scientists is suing a right-wing author and a policy analyst for defamation. The case comes at a time when attacks on scientists are proliferating, says Peter Hotez, professor of Pediatrics and Molecular Virology at Baylor College of Medicine. Even as misinformation about scientists and their work keeps growing, Hotez says scientists haven't yet found a good way to respond. "The reason we're sort of fumbling at this is it's unprecedented. And there is no roadmap," he says. The climate scientist at the center of this trial is Michael Mann. The professor of earth and environmental science at the University of Pennsylvania gained prominence for helping make one of the most accessible, consequential graphs in the history of climate science. First published in the late 1990s, the graph shows thousands of years of relatively stable global temperatures. Then, when humans start burning lots of coal and oil, it shows a spike upward. Mann's graph looks like a hockey stick lying on its side, with the blade sticking straight up. The so-called "hockey stick graph" was successful in helping the public understand the urgency of global warming, and that made it a target, says Kert Davies, director of special investigations at the Center for Climate Integrity, a climate accountability nonprofit. "Because it became such a powerful image, it was under attack from the beginning," he says.

The attacks came from groups that reject climate science, some funded by the fossil fuel industry. In the midst of these types of attacks -- including the hacking of Mann's and other scientists' emails by unknown hackers -- Penn State, where Mann was then working, opened an investigation into his research. Penn State, as well as the National Science Foundation, found no evidence of scientific misconduct. But a policy analyst and an author wrote that they were not convinced. The trial in D.C. Superior Court involves posts from right-wing author Mark Steyn and policy analyst Rand Simberg. In an online post, Simberg compared Mann to former Penn State football coach Jerry Sandusky, a convicted child sex abuser. Simberg wrote that Mann was the "Sandusky of climate science," writing that Mann "molested and tortured data (PDF)." Steyn called Mann's research fraudulent. Mann sued the two men for defamation. Mann also sued the publishers of the posts, National Review and the Competitive Enterprise Institute, but in 2021, the court ruled they couldn't be held liable.

In court, Mann has argued that he lost funding and research opportunities. Steyn said in court that if Penn State's president, Graham Spanier, covered up child sexual assault, why wouldn't he cover up for Mann's science. The science in question used ice cores and tree rings to estimate Earth's past temperatures. "If Graham Spanier is prepared to cover up child rape, week in, week out, year in, year out, why would he be the least bit squeamish about covering up a bit of hanky panky with the tree rings and the ice cores?" Steyn asked the court. Mann and Steyn declined to speak to NPR during the ongoing trial. One of Simberg's lawyers, Victoria Weatherford, said "inflammatory does not equal defamatory" and that her client is allowed to express his opinion, even if it were wrong. "No matter how offensive or distasteful or heated it is," Weatherford tells NPR, "that speech is absolutely protected under the First Amendment when it's said against a public figure, if the person saying it believed that what they said was true."

The European Commission today recommended reducing carbon dioxide emissions from fossil fuels by 90 percent by 2040 compared to 1990 levels. From a report: At face value, it's an ambitious target for transforming the European Union's energy system. As always, though, the devil is in the details. And the proposed plan is already garnering a range of strong reactions. A formal proposal still needs to be issued, but it has already faced pushback on how much of those pollution cuts should come from risky tactics aimed at capturing rather than preventing pollution. Some environmental groups are also criticizing a glaring omission in the draft: while it mentions phasing out coal, there's no strategy to phase out oil and gas.

"You can set targets to cut greenhouse gases as high as you like, but without a clear plan to phase-out the fossil fuels that are producing them they simply aren't credible. It's like building a bike without pedals, how are you going to power it?" Dominic Eagleton, senior fossil fuels campaigner at the nonprofit Global Witness, said in a statement today. The world actually came tantalizingly close to a deal to phase out fossil fuels during a United Nations climate conference in Dubai last December. Despite dozens of countries pushing for that kind of commitment, the agreement ultimately calls for "transitioning away from fossil fuels in energy systems, in a just, orderly and equitable manner." It also carves out room for controversial technologies for capturing carbon dioxide pollution.

An anonymous reader shares a report: With progress in the battle against cancer progressing slowly on Earth, California researchers have teamed up with astronauts to take the battle to the stars. In space, the weak pull of gravity, also known as microgravity, places cells under incredible stress, causing them to age more rapidly. This phenomenon allows scientists to witness the progression of cancer growth -- and the effect of cancer treatments -- much more rapidly than they could on Earth.

When the Axiom 3 spaceflight launched from Kennedy Space Center in Cape Canaveral, Fla., on Jan. 18, bound for the International Space Station, it took with it four crewmembers and some other unusual passengers -- miniature tumor organoids produced from the cells of cancer patients, grown in the lab by scientists at the University of California San Diego. Axiom 3 was slated for splashdown on Saturday but has been delayed until Tuesday, at the earliest, due to weather, according to SpaceX, which manufactured the Crew Dragon spacecraft used for the mission.

It wasn't the first time the team -- led by Dr. Catriona H.M. Jamieson, a hematologist and medical professor at the college -- sent such samples into space. It previously launched stem cells on multiple Space X flights and noticed that pre-leukemic changes occurred, unseen during the same timeframe in controls on the ground. "We said, 'Wait, what if you send cancer up?'" Jamieson tells Fortune. "'Will the cancer go from bad to worse?' And the answer is yes, under conditions of stress" caused by microgravity.

The "technology building blocks" for space solar are already available, reports Clean Technica. "It's just a matter of scaling, systems integration, and adjustments for space-hardiness."

And several groups are looking at it — including the U.S. Space Force To help push costs down, the California Institute of Technology has proposed a sandwich-type solar module that integrates solar harvesting along with conversion to a radio frequency into one compact package, accompanied by a built-in antenna. Last month researchers at the school wrapped up a months-long, in-space test of different types of solar cells. Another approach is illustrated by the Michigan startup Virtus Solis, an industry partner of the University of Bristol. Last June the company and the school received £3.3 million in funding from the UK Net Zero Innovation program, for developing an open-source model for testing the performance of large, centralized antennas in space. "The concept depends upon the use of gigascale antenna arrays capable of delivering over 2GW of power from space onto similar gigascale antenna arrays either at sea or on the ground," the school explained.

As for how such a thing would be launched into space, that's where the U.S. Space Force comes in. Last August, the Space Force awarded a small business contract to the U.S. startup Orbital Composites. The company is tasked with the mission of developing its patented "quantum antenna" and in-space fabrication tools for secure communications in space applications, including space-to-space as well as space-to-Earth and vice versa. The basic idea is to let 3D printing doing much of the work in space. According to Orbital, in-space fabrication would save more than 100 times the cost of applying conventional fabrication methods to large-scale orbiting antennas. "By harnessing the potential of In-Space Servicing, Assembly, and Manufacturing (ISAM), the company eyes the prospect of creating significantly larger space antennas," Orbital Composites explains. "By fabricating antennas in space, larger and more complex designs are possible that eliminate the constraints of launch and rocket fairings...."

If you're guessing that a hookup between Virtus and Orbital is in the works, that's a good guess. On February 1, at the SpaceCOM conference in Orlando, Florida, Virtus Solis let slip that it is working with Orbital Composites on a space solar pilot project. If all goes according to plan, the project will be up and running in 2027, deploying Virtus's robot-enabled fabrication system with Orbital's 3D printing. As of this writing the two companies have not posted details, but Space News picked up the thread. "The 2027 mission is designed to showcase critical power-generation technologies including in-space assembly of solar panels and transmission of more than one kilowatt to Earth," Space News explained. "The news release calls the 2027 mission "a precursor to large-scale commercial megawatt-class solar installations in space by 2030...."

To be clear, Orbital's press release about its new Space Force quantum antenna contract does not mention anything in particular about space solar. However, the pieces of the puzzle fit. Along with the Virtus and Grumman connections, in October of 2022 Orbital won a small business contract through SpaceWERX, the Space Force's innovative technologies funding arm, to explore the capabilities of ISAM systems.
"SpaceWERX comes under the umbrella of the U.S. Air Force's AFWERX innovation branch, which has developed a program called SSPIDR, short for Space Solar Power Incremental Demonstrations and Research Project," the article points out. (While Virtus believes most space-based solar power systems could deliver megawatt hours of electricity at prices comparable to today's market.)