Curbs on the sale of house coal and wet wood for household burning in England have come into force under new rules aimed at cutting air pollution. From a report: People will still be able to use stoves and open fires but they will need to burn cleaner alternatives. These are the first restrictions on what people can burn in their homes since the clean air acts of the 1950s. The UK's air is far cleaner now, but in recent years pollution from log burners has increased dramatically. Only 8% of households use them, but they are now the biggest source of the tiny pollution particles that are most damaging to health, according to government data. It shows domestic wood burning in both closed stoves and open fires was responsible for 38% of pollution particles under 2.5 microns in size, three times more than road traffic. These tiny particles can enter the bloodstream and lodge in lungs and other organs, the Department for Environment Food and Rural Affairs (Defra) warns, and have been identified by the World Health Organization as the most serious air pollutant for human health.

It's taken 17 years, with many setbacks and some deaths, and still Richard Branson's space mission is yet to launch. From a report: Richard Branson was running almost 15 years late. But as we rode into the Mojave desert on the morning of 12 December 2018, he was feeling upbeat and untroubled by the past. He wore jeans, a leather jacket and the easy smile of someone used to being behind schedule. Branson hadn't exactly squandered the past 15 years. He'd become a grandfather, moved to a private island in the Caribbean and expanded Virgin's business empire into banking, hotels, gyms, wedding dresses and more. But he was staking his legacy on Virgin Galactic, the space tourism company he formed in 2004. The idea was to build a rocketship with seats for eight -- two pilots, six passengers -- that would be carried aloft by a mothership, released about 45,000ft in the air and then zoom just beyond the lower limit of space, float around for a few minutes, before returning to Earth. He was charging $200,000 a seat. It did not initially seem like such a crazy idea. That year, a boutique aviation firm in Mojave, California, two hours north of Los Angeles, had built a prototype mothership and rocketship that a pair of test pilots flew to space three times, becoming the first privately built space craft. Branson hired the firm to design, build and test him a bigger version of the craft.

But the undertaking was proving far more difficult than Branson anticipated. An accidental explosion in 2007 killed three engineers. A mid-air accident in 2014 destroyed the ship and killed a test pilot, forcing Virgin Galactic to more or less start over. I approached the company shortly after the accident to ask if I could embed with them and write a story about their space programme for the New Yorker. I worked on the story for four years. After it came out, in August 2018, I spent another two years reporting and writing a book about the test pilots who fly Branson's spaceship. Amid the tragedies and setbacks, Branson remained optimistic of the prospect of imminent success. In 2004: "It is envisaged that Virgin Galactic will open for business by the beginning of 2005 and, subject to the necessary safety and regulatory approvals, begin operating flights from 2007." Then, in 2009: "I'm very confident that we should be able to meet 2011." Later, in 2017: "We are hopefully about three months before we are in space, maybe six months before I'm in space." Meanwhile, other private space companies, such as Elon Musk's SpaceX and Jeff Bezos's Blue Origin, were making progress. Branson confessed that had he known in 2004 what he knew now, "I wouldn't have gone ahead with the project... We simply couldn't afford it."

His record on delivering promises has made him a polarising figure. Branson has appeared on lists of both hucksters and heroes. One poll ranked him second among people whom British children should emulate; Jesus Christ came third. His biographer describes him as "a card player with a weak hand who plays to strength," but also a "self-made and self-deprecating man whose flamboyance endears him to aspiring tycoons, who snap up his books and flock to his lectures to glean the secrets of fortune-hunting." But all of that was in the past; the turmoil and hardship would hopefully make the triumph all that much sweeter. For he and I knew as we headed into the desert that tomorrow could finally be the day that Virgin Galactic went to space.

Four astronauts in a SpaceX Dragon capsule successfully splashed down into the Gulf of Mexico this morning at 2:57 a.m. ET — returning from the International Space Station in the first U.S. crew splashdown in darkness since the Apollo 8 moonshot in 1968.

Phys.org reports: It was an express trip home, lasting just 6 1/2 hours... "We welcome you back to planet Earth and thanks for flying SpaceX," SpaceX's Mission Control radioed moments after splashdown. "For those of you enrolled in our frequent flyer program, you've earned 68 million miles on this voyage...."

The 167-day mission was the longest for a crew capsule launching from the U.S. The previous record of 84 days was set by NASA's final Skylab station astronauts in 1974. Saturday night's undocking left seven people at the space station, four of whom arrived a week ago via SpaceX...

Once finished with their medical checks on the ship, the astronauts planned to hop on a helicopter for the short flight to shore, then catch a plane straight to Houston for a reunion with their families. "It's not very often you get to wake up on the space station and go to sleep in Houston," chief flight director Holly Ridings told reporters.

The astronauts' capsule, Resilience, will head back to Cape Canaveral for refurbishment for SpaceX's first private crew mission in September... A tech billionaire has purchased the entire three-day flight, which will orbit 75 miles (120 kilometers) above the space station. He'll fly with a pair of contest winners and a physician assistant from St. Jude Children's Research Hospital, his designated charity for the mission.

SpaceX's next astronaut launch for NASA will follow in October.

Something remarkable happened last weekend, according to a climate change newsletter by the Los Angeles Times.

California, the world's fifth-largest economy, hit nearly 95% renewable energy. Sort of... There are several caveats. For one thing, Saturday's 94.5% figure — a record, as confirmed to me by the California Independent System Operator — was fleeting, lasting just four seconds. It was specific to the state's main power grid, which covers four-fifths of California but doesn't include Los Angeles, Sacramento and several other regions. It came at a time of year defined by abundant sunshine and relatively cool weather, meaning it's easier for renewable power to do the job traditionally done by fossil fuels.

And fossil fuels actually were doing part of the job — more than the 94.5% figure might suggest. California was producing enough clean power to supply nearly 95% of its in-state needs, but it was also burning a bunch of natural gas and exporting electricity to its Western neighbors. It's impossible to say exactly how much of the Golden State's own supply was coming from renewables.

That said, what happened on Saturday is definitely a big deal.... The 94.5% record may have been fleeting, but it wasn't some isolated spike. Most of Saturday afternoon, the renewables number topped 90%, with solar and wind farms doing the bulk of the work and geothermal, biomass and hydropower facilities making smaller contributions. Add in the Diablo Canyon nuclear plant — which isn't counted toward California's renewables mandate — and there was enough climate-friendly power at times Saturday to account for more than 100% of the state's electricity needs...

The important thing now is making sure the puzzle pieces of the grid fit together on hot summer evenings, like the ones last August when insufficient supplies after sundown led to rolling blackouts.

"Scientists have spotted one of the largest stellar flares ever recorded in our galaxy," reports Space.com: The jets of plasma shot outward from the sun's nearest neighbor, the red dwarf star Proxima Centauri. The flare, which was around 100 times more powerful than any experienced in our solar system, could change the way scientists think about solar radiation and alien life...

On May 1, 2019, the team captured the mega flare, which shone for just 7 seconds and was mainly visible in the ultraviolet spectrum. "The star went from normal to 14,000 times brighter when seen in ultraviolet wavelengths over the span of a few seconds," lead author Meredith MacGregor, an astrophysicist at the University of Colorado Boulder, said in a statement...

The flare on Proxima Centauri was extremely powerful compared with those emitted by the sun. Unlike flares from the sun, this one also emitted different kinds of radiation. In particular, it produced a huge surge of ultraviolet light and radio waves — known as "millimeter radiation...." The new findings suggest that stellar flares given off by red dwarfs are much more violent than previously expected and could reduce the likelihood of alien life developing around them.
Proxima Centauri is orbited by two explanets, one of which "is considered to be Earth-like and lies within the star's habitable zone — the distance from a star that could support the development of life, according to the researchers..."

But in a statement, the leader authors now points out that Proxima Centauri's planets "are getting hit by something like this not once in a century, but at least once a day, if not several times a day."

Astronomers reconstructed a space rock's path before it exploded over southern Africa in 2018 and sprinkled the Kalahari with meteorites. From a report: On the morning of June 2, 2018, an asteroid was seen careening toward us at 38,000 miles per hour. It was going to impact Earth, and there was nothing anyone could do to stop it. Astronomers were beside themselves with excitement. Five feet long and weighing about the same as an adult African elephant, this space rock posed no threat. But the early detection of this asteroid, only the second to be spotted in space before hitting land, was a good test of our ability to spot larger, more dangerous asteroids. Moreover, it afforded scientists the chance to study the asteroid before its obliteration, quickly narrow down the impact site and obtain some of the most pristine, least weathered meteorite samples around. Later that day, a fireball almost as bright as the sun illuminated Botswana's darkened sky before exploding 17 miles above ground with the force of 200 tons of TNT. Fragments fell like extraterrestrial buckshot into a national park larger than the Netherlands.

Immediately, Botswanan scientists and guides joined with international meteorite experts to hunt for the asteroid's wreckage. As of November 2020, the team has found 24 individual meteorites. And thanks to the telltale geology of these rocky leftovers, observations of their path to Earth and the memories of a dead NASA spacecraft, scientists were able to unspool the history of this asteroid with breathtaking detail. As reported earlier this month in the journal Meteoritics & Planetary Science, Botswana's off-world visitor was once part of Vesta, a gigantic ramshackle asteroid forged at the dawn of the solar system. About 22 million years ago, another asteroid crashed into one of its lonely hills, leaving a modest crater and sending countless shards of Vesta on a space odyssey. One of them was the object that fell over southern Africa in 2018, an explosive end to a lonely journey. 'It is such an amazing thing to be in possession of such a rare specimen with so much history attached to it," said Mohutsiwa Gabadirwe, a geologist and curator at the Botswana Geoscience Institute who is a co-author.

Named 2018 LA, the asteroid was first seen by the Catalina Sky Survey, a trio of telescopes north of Tucson, Ariz. Additional telescopes, like the SkyMapper Southern Sky Survey, saw it too, allowing scientists to tentatively map out an impact site in southern Africa. Peter Jenniskens, a meteorite expert at the SETI Institute and study author, said that the initial search area was a 1,400-square-mile patch in Botswana. Hoping to shrink it down, he visited local businesses with Oliver Moses of the Okavango Research Institute. They located security camera footage at a hotel and gas stations that had recorded the fireball, allowing them to more precisely pinpoint the fall site: a (still-sizable) spot within the Central Kalahari Game Reserve. This was a surreal place to go meteorite hunting. Bat-eared foxes and warthogs strolled past, lions stealthily stalked and slaughtered giraffes while leopards lounged in trees. Wardens from Botswana's Department of Wildlife and National Parks protected the search party in case a fanged predator got too close for comfort. The meteorites also looked a lot like animal poop, meaning the team were frequently bamboozled by coprological impostors. 'It was a totally unusual experience for all of us,' said Mr. Gabadirwe.

Today, Blue Origin revealed that it will be selling the first tickets for rides on its space tourism rocket called New Shepard. According to CNBC, the first ticket (or tickets?) will go on sale starting next week, on Wednesday, May 5. From the report: Blue Origin did not reveal how much tickets will cost, only saying that more details will come on May 5 to those who submit their name and email on a form on the company's website. "Sign up to learn how you can buy the very first seat on New Shepard," according to the company's website. The announcement's video features Bezos going out to the capsule of New Shepard after the company's test flight earlier this month. It shows him driving across the Texas desert, the remote location of the New Shepard launch facility -- notably at the wheel of a Rivian R1T electric truck, which is emblazoned with Blue Origin's signature feather.

New Shepard is designed to carrying as many as six people at a time on a ride past the edge of space, with the capsules on previous test flights reaching an altitude of more than 340,000 feet (or more than 100 km). The capsule, which has massive windows to give passengers a view, spends as much as 10 minutes in zero gravity before returning to Earth. The rocket launches vertically, with the booster detaching and returning to land at a concrete pad nearby. The capsule's return is slowed down by a set of parachutes, before softly landing in the desert.

The vast majority of the world's mountain glaciers are losing 31 percent more snow and ice per year than they did 15 years earlier, according to 3D satellite measurements. Scientists blame human-caused climate change. NBC News reports: Using 20 years of recently declassified satellite data, scientists calculated that the world's 220,000 mountain glaciers are losing more than 328 billion tons (298 billion metric tons) of ice and snow per year since 2015, according to a study in Wednesday's journal Nature. That's enough melt flowing into the world's rising oceans to put Switzerland under almost 24 feet (7.2 meters) of water each year.

The annual melt rate from 2015 to 2019 is 78 billion more tons (71 billion metric tons) a year than it was from 2000 to 2004. Global thinning rates, different than volume of water lost, doubled in the last 20 years and "that's enormous," said Romain Hugonnet, a glaciologist at ETH Zurich and the University of Toulouse in France who led the study. Half the world's glacial loss is coming from the United States and Canada. Alaska's melt rates are "among the highest on the planet," with the Columbia glacier retreating about 115 feet (35 meters) a year, Hugonnet said.

Almost all the world's glaciers are melting, even ones in Tibet that used to be stable, the study found. Except for a few in Iceland and Scandinavia that are fed by increased precipitation, the melt rates are accelerating around the world. The near-uniform melting "mirrors the global increase in temperature" and is from the burning of coal, oil and gas, Hugonnet said. Some smaller glaciers are disappearing entirely.

An astronaut who flew on one of the most famous space missions of all time has died. From a report: Michael Collins, 90, was part of the three-member crew on Apollo 11, the first lunar landing mission in 1969. Unlike Neil Armstrong and Buzz Aldrin, he never walked on the moon. Collins stayed behind and piloted the command module as it circled above. Because of that, Collins is often called the 'forgotten astronaut'. Collins had been battling cancer. In a statement released by his family, "He spent his final days peacefully, with his family by his side. Mike always faced the challenges of life with grace and humility, and faced this, his final challenge in the same way."

NASA Administrator Steve Jurczyk said the nation lost a true pioneer, "NASA mourns the loss of this accomplished pilot and astronaut, a friend of all who seek to push the envelope of human potential. Whether his work was behind the scenes or on full view, his legacy will always be as one of the leaders who took America's first steps into the cosmos. And his spirit will go with us as we venture toward farther horizons." When Neil Armstrong first stepped on the moon and uttered the famous phrase, "Houston, Tranquility Base here, the Eagle has landed," Collins was in orbit, 60 miles above, just as busy, and just as excited, telling the team back in Houston he was listening to communications with his comrades, and it was "fantastic." Aldrin and Armstrong were on the lunar surface just under 22 hours. The world was transfixed. Seeing them bunny-hop along, take pictures and collect lunar samples during their single, short moonwalk. All the while, Collins circled the moon. Looking down at the barren lunar landscape and peering back at the Earth. "The thing I remember most is the view of planet Earth from a great distance," he said later. "Tiny. Very shiny. Blue and white. Bright. Beautiful. Serene and fragile."

Dr Anthony Fauci, the White House's chief medical adviser, has said countries have failed to unite to provide an adequate global response to prevent the "tragic" coronavirus outbreak from overwhelming India, and singled out wealthier nations for failing to provide equitable access to healthcare around the world. From a report: Speaking to Guardian Australia from the US, Fauci said the situation in India had highlighted global inequality. "The only way that you're going to adequately respond to a global pandemic is by having a global response, and a global response means equity throughout the world," Fauci said. "And that's something that, unfortunately, has not been accomplished. Often when you have diseases in which there is a limited amount of intervention, be it therapeutic or prevention, this is something that all the countries that are relatively rich countries or countries that have a higher income have to pay more attention to."

India recorded 360,960 new cases in the 24 hours to Wednesday morning according to health ministry data, another new daily global record. The ministry also said that India's total number of fatalities had passed 200,000 to stand at 201,187. The latest epidemiological update from the World Health Organization (WHO) issued on Tuesday said Covid-19 cases increased globally for the ninth consecutive week, with nearly 5.7m new cases reported. India accounts for the majority of cases, with 2,172,063 new cases reported in the past week -- a 52% increase.

Maya Wei-Haas writes via National Geographic: Standing among patches of muddy snow on the outskirts of Baltimore, Maryland, I bent down to pick up a piece of the planet that should have been hidden miles below my feet. On that chilly February day, I was out with a pair of geologists to see an exposed section of Earth's mantle. While this layer of rock is usually found between the planet's crust and core, a segment peeks out of the scrubby Maryland forest, offering scientists a rare chance to study Earth's innards up close. Even more intriguing, the rock's unusual chemical makeup suggests that this piece of mantle, along with chunks of lower crust scattered around Baltimore, was once part of the seafloor of a now-vanished ocean.

Over the roughly 490 million years since their formation, these hunks of Earth were smashed by shifting tectonic plates and broiled by searing hot fluids rushing through cracks, altering both their composition and sheen. Mantle rock is generally full of sparkly green crystals of the mineral olivine, but the rock in my hand was surprisingly unremarkable to look at: mottled yellow-brown stone occasionally flecked with black. Because of this geologic clobbering, scientists have struggled for more than a century to determine the precise origins of this series of rocks. Now, Guice and his colleagues have applied a fresh eye and state-of-the-art chemical analyses to the set of rocky exposures in Baltimore. Their work shows that the seemingly bland series of stones once lurked underneath the ancient Iapetus Ocean.

More than half a billion years ago, this ocean spanned some 3,000 to 5,000 miles, cutting through what is now the United States' eastern seaboard. Much of the land where the Appalachian mountains now stand was on one side of the ocean, and parts of the modern East Coast were on the other. "It's a huge ocean between them, and we've got a little bit of that ocean smooshed in Baltimore," says Guice, lead author of a recent study describing the find in the journal Geosphere.

Cleaner skies over South Asia that resulted from pandemic lockdowns last year likely affected the timing of snowmelt in the Indus River basin of Pakistan and India, researchers reported on Monday. From a report: The lockdowns cut emissions of soot and other pollutants, as people drove less and the generation of electricity, largely from coal, was reduced. That meant less soot was deposited on snow, where it absorbs sunlight, emits heat and causes faster melting. The cleaner snow in 2020 reflected more sunlight and did not melt as fast, the researchers said. In all, that delayed runoff into the Indus River of more than than one and a half cubic miles of melt water, they calculated, similar to the volume of some of the largest reservoirs in the United States. More than 300 million people depend on the Indus for water, much of which starts as snow in the high peaks of the Karakoram and other mountain ranges.

Timing of melt water runoff in the spring and summer can be crucial for managing water supplies over time. In many parts of the world, climate change has affected this timing, with warmer temperatures and a shift to more rain and less snow causing more snow to melt sooner. Slower runoff can thus be beneficial, helping managers of reservoirs store more water and maintain a steady flow over the year. Ned Bair, a snow hydrologist at the University of California, Santa Barbara, and the lead researcher, said that while they could not prove conclusively that the pandemic was the reason for the timing delay, "it seems unlikely that anything else would have led to that." India imposed a nationwide lockdown in late March last year that continued through early May. Several studies showed rapid improvements in air quality in that period, particularly in and around Delhi, which is notorious for having some of the most unhealthy air in the world.

"NASA's Ingenuity Mars Helicopter continues to set records, flying faster and farther on Sunday, April 25, 2021 than in any tests it went through on Earth," reports NASA: The helicopter took off at 1:31 a.m. EDT (4:31 a.m. PDT), or 12:33 p.m. local Mars time, rising 16 feet (5 meters) — the same altitude as its second flight. Then it zipped downrange 164 feet (50 meters), almost half the length of a football field, reaching a top speed of 6.6 feet per second (2 meters per second). [Roughly 4.5 miles an hour.]

After data came back from Mars starting at 10:16 a.m. EDT (7:16 a.m. PDT), Ingenuity's team at NASA's Jet Propulsion Laboratory in Southern California was ecstatic to see the helicopter soaring out of view. They're already digging through a trove of information gathered during this third flight that will inform not just additional Ingenuity flights but possible Mars rotorcraft in the future. "Today's flight was what we planned for, and yet it was nothing short of amazing," said Dave Lavery, the project's program executive for Ingenuity Mars Helicopter at NASA Headquarters in Washington. "With this flight, we are demonstrating critical capabilities that will enable the addition of an aerial dimension to future Mars missions."
NASA's chief pilot for the Mars helicopter calls this flight a big step "in which Ingenuity will begin to experience freedom in the sky," according to CNN.

From the sky Ingenuity snapped a photo of its own shadow on Mars, and earlier sent back the very first aerial color image — taken 17 feet (5.2-metre) above the surface of Mars by Ingenuity's high-resolution color camera with a 4208-by-3120-pixel sensor.

The New York Times reports: A major United Nations report will declare that slashing emissions of methane, the main component of natural gas, is far more vital than previously thought... It also says that — unless there is significant deployment of unproven technologies capable of pulling greenhouse gases out of the air — expanding the use of natural gas is incompatible with keeping global warming to 1.5 degrees Celsius, a goal of the international Paris Agreement...

The reason methane would be particularly valuable in the short-term fight against climate change: While methane is an extremely potent greenhouse gas, it is also relatively short-lived, lasting just a decade or so in the atmosphere before breaking down. That means cutting new methane emissions today, and starting to reduce methane concentrations in the atmosphere, could more quickly help the world meet its midcentury targets for fighting global warming. By contrast, carbon dioxide, the main greenhouse gas, lasts for hundreds of years in the atmosphere... While cutting back on carbon dioxide emissions will remain urgent, "it's going to be next to impossible to remove enough carbon dioxide to get any real benefits for the climate in the first half of the century," said Drew Shindell, the study's lead author and a professor of earth science at Duke University. "But if we can make a big enough cut in methane in the next decade, we'll see public health benefits within the decade, and climate benefits within two decades," he said...

Carbon dioxide is the biggest driver of climate change, but methane is more potent in the shorter term, warming the atmosphere more than 80 times as much as the same amount of carbon dioxide does over a 20-year period. That's bad news, but it also means that cutting methane emissions may be one of the most effective ways to immediately slow rising global temperatures... Unlike carbon dioxide or most other air pollution, methane isn't released by burning fossil fuels, but comes from leaks and other releases from oil and gas infrastructure, among other sources... Fixing those leaks in theory should pay for themselves by saving money, because capturing the gas means companies capture more product. That potential makes plugging leaks from oil and gas infrastructure the most effective and cheapest way to slow emissions, the U.N. report says...

Rolling back methane emissions would prevent more than 250,000 premature deaths, and more than 750,000 asthma-related hospital visits, each year from 2030 onward, the report finds. The lower emissions would also prevent more than 70 billion hours of lost labor from extreme heat and more than 25 million tons of crop losses a year.
One professor of ecology and environmental biology at Cornell University tells the Times we've overestimated agriculture's role in methane while underestimating the fuel industry's role, while another researcher found that methane-reduction efforts in the top-polluting industries could slow global warming by 30 percent.

"Over all, a concerted effort to reduce methane from the fossil fuel, waste and agricultural sectors could slash methane emissions by as much as 45 percent by 2030, helping to avoid nearly 0.3 degrees Celsius of global warming as early as the 2040s, the report says."

Technology/space pundit Robert Cringely writes that SpaceX's winning bid on NASA's Artemis lunar lander contract was helped by its flexibility in how it would be paid — made possibly by SpaceX's cushy financial position.

But he believes that's part of a larger story about SpaceX's "steadily crushing its competitors by building a hyper-efficient space ecosystem where the other guys are just building rockets," arguing that SpaceX has already won the global war of ISPs "at a net cost of ZERO dollars," if not a negative net cost, while realizing a dream of a satellite internet service that for 30 years has eluded investors like Bill Gates:

SpaceX making a profit where one would not normally exist comes thanks to U.S. residents who pay telephone and Internet bills. The U.S. Federal Communications Commission (FCC) has been socking-away for a decade about $1.8 billion per year from you and me, saving-up to pay for expansions of rural telephony and broadband. There is now about $16 billion in this federal kitty and the FCC is starting to spend it with telephone and internet service providers, paying them to extend broadband and voice services to remote rural users who are presently underserved or unserved completely. All of this is both perfectly legal and even a good idea. Everybody wins. But circumstances are turning out to indicate that SpaceX is probably winning more than anyone else... So far SpaceX has won auctions for service in parts of 35 states for a total of $885 million... SpaceX just bid for potential customers in places where other companies typically didn't even bother to bid. They took the obvious remote customers and apparently won't be over-charging them or the government, either...

There is no FCC rule saying Comcast couldn't sub-contract...difficult customers to Starlink... Instead of earning $885 million of those FCC subsidies, Starlink is more likely to gain half of the full $9.2 billion — money that can be used for any purpose including financing that Artemis lander. But remember that satellites are a global resource. If SpaceX launches 4000 or 12,000 Starlink satellites to serve the USA, they'll also serve anywhere else the satellites overfly, even North Korea. The same level of service Starlink offers in Omaha will be available in Vietnam or on tankers in the Pacific ocean.

Once Starlink becomes effectively the dominant ISP in America, it will also become the dominant ISP in the world. And all at no cost to SpaceX since the expansion will have been financed from our phone bills.
Cringely cites estimates that 40,000 satellites would be enough to serve every Internet user on Earth, as well as IoT devices and even future as-yet-uninvented network services.

He also asks whether this might ultimately make it harder for China to censor the internet — and whether Apple might attempt a competing satellite-to-phone network, possibly using technology from Samsung.

The massive melting of glaciers as a result of global heating has caused marked shifts in the Earth's axis of rotation since the 1990s, research has shown. It demonstrates the profound impact humans are having on the planet, scientists said. New submitter DickHodgman shares a report: In the past, only natural factors such as ocean currents and the convection of hot rock in the deep Earth contributed to the drifting position of the poles. But the new research shows that since the 1990s, the loss of hundreds of billions of tonnes of ice a year into the oceans resulting from the climate crisis has caused the poles to move in new directions. The scientists found the direction of polar drift shifted from southward to eastward in 1995 and that the average speed of drift from 1995 to 2020 was 17 times faster than from 1981 to 1995. Since 1980, the position of the poles has moved about 4 metres in distance.

An anonymous reader quotes a report from Ars Technica: Extreme weather has become the new normal -- whether it's precipitation, drought, wind, heat, or cold. The question of how the ever-shrinking layer of Arctic sea ice has contributed to any of these changes has prompted some lively discussion over the past few years. Researchers have proposed that a weakened jet stream driven by vanishing Arctic sea ice might play a large role in extreme winter events like the descending polar vortex that struck North America earlier this year. But the idea hasn't held up well in light of more recent evidence.

But now, researchers have identified a direct link between extreme winter weather and sea ice loss. The 2018 "Beast of the East" winter storm hit Europe with record-breaking snowfall and low temperatures. And potentially as much as 88 percent of that snowfall originated from increased evaporation of the Barents Sea.

The working hypothesis is that Arctic sea ice acts as a cap for Arctic waters, limiting evaporation. Less sea ice and warmer Arctic temperatures mean more evaporation, potentially explaining the increased severity of winter storms like the Beast of the East. Until now, it's been tough to measure direct evidence linking sea ice loss to extreme European winters, but recent advances in technology are making this a little less challenging.

NASA's first attempt to fly its "Ingenuity" helicopter on Mars was a success, marking what the space agency says is the first powered, controlled flight by an aircraft on another world. The BBC reports: The space agency is promising more adventurous flights in the days ahead. Ingenuity will be commanded to fly higher and further as engineers seek to test the limits of the technology. The rotorcraft was carried to Mars in the belly of Nasa's Perseverance Rover, which touched down in Jezero Crater on the Red Planet in February.

The demonstration saw the Mars-copter rise to just over 3m, hover, swivel 96 degrees, hover some more, and then set down. In all, it managed almost 40 seconds of flight, from take-off to landing. Getting airborne on the Red Planet is not easy. The atmosphere is very thin, just 1% of the density here at Earth. This gives the blades on a rotorcraft very little to bite into to gain lift. There's help from the lower gravity at Mars, but still -- it takes a lot of work to get up off the ground. Ingenuity was therefore made extremely light and given the power (a peak power of 350 watts) to turn those blades extremely fast - at over 2,500 revolutions per minute for this particular flight. Control was autonomous. The distance to Mars - currently just under 300 million km -- means radio signals take minutes to traverse the intervening space. Flying by joystick is simply out of the question.

Ingenuity has two cameras onboard. A black-and-white camera that points down to the ground, which is used for navigation, and a high-resolution colour camera that looks out to the horizon. Sample navigation images sent back to Earth revealed the helicopter's shadow on the floor of the crater as it came back in to land. Satellites will send home more pictures of the flight over the next day. There was only sufficient bandwidth in the orbiters' first overflight to return a short snatch of video from Perseverance, which was watching and snapping away from a distance of 65m. Longer sequences should become available in due course.

Slashdot reader quonset reminds us that NASA's Mars helicopter "is officially 'go' for flight!," according to the Twitter feed of the Perserverance Rover, which notes that its cameras are ready to film the historic event.

"Watch with the team as they receive data and find out if they were successful," adds NASA's official feed. "Meet us in mission control April 19 at 6:15am ET (10:15am UTC): Data from the first flight will return to Earth a few hours following the autonomous flight. A livestream will begin at 6:15 a.m. EDT (3:15 a.m. PDT), as the helicopter team prepares to receive the data downlink in the Space Flight Operations Facility at NASA's Jet Propulsion Laboratory (JPL). Watch on NASA Television, the agency app, website, and social media platforms, including YouTube and Facebook.

If the flight takes place April 19, a postflight briefing will be held at 2 p.m. EDT (11 a.m. PDT)...

The public and media also may ask questions on social media during the livestream and briefing using #MarsHelicopter. Find the latest schedule updates here.

The Perseverance rover will provide support during flight operations, taking images, collecting environmental data, and hosting the base station that enables the helicopter to communicate with mission controllers on Earth.
Update: And it's a success! "We've been talking for so long about our Wright Brothers moment on Mars, and here it is," said NASA Ingenuity Mars Helicopter project manager MiMi Aung. The Perserverance rover has already tweeted out a choppy video.

The New York Focus site writes: A decade ago, the bankrupt owner of the Greenidge power plant in Dresden, New York, sold the uncompetitive coal-fired relic for scrap and surrendered its operating permits. For the next seven years, the plant sat idle on the western shore of Seneca Lake, a monument to the apparent dead end reached by the state's fossil fuel infrastructure. But today, Greenidge is back up and running as a Bitcoin mining operation. The facility hums with energy-hungry computers that confirm and record Bitcoin transactions, drawing power from the plant's 106-megawatt generator now fueled by natural gas.

The mining activity is exceptionally profitable, thanks to an 800 percent rise in Bitcoin's price since last April. Seeking to ride the boom, the plant's new owners plan to quadruple the power used to process Bitcoin transactions by late next year. Environmental advocates view Greenidge's ambitions, if left unchecked, as an air emissions nightmare. And they fear that dozens of other retired or retiring fossil-fueled power plants across New York could follow Greenidge's example, gaining new life by repurposing as Bitcoin miners or other types of energy-intense data centers.
The New York Times recently touted an alternative to bitcoin mining: the "proof of stake" method, which "instead awards miners new blocks based on how much cryptocurrency they already own." The world's second-largest cryptocurrency by market capitalization, Ethereum, has said it is moving toward proof of stake (that switch is likely to take up to another year). Though some critics say Bitcoin will eventually need to follow, particularly if an environmental backlash grows, there are no current plans to do so and such a move is unpopular within the Bitcoin community.

"That reduces your emissions to almost nothing," said Joseph Pallant, Blockchain for Climate's founder and executive director. Cryptocurrency platforms like Tezos or Near Protocol already use proof of stake and have vastly lowered their energy use.