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Businesses

Sierra Space, Valued At $5.3 Billion, Eyes IPO To 'Accelerate the New Space Economy' (yahoo.com) 26

Sierra Space CEO Tom Vice told Yahoo Finance it plans to go public within the next 18 months at a valuation of $5.3 billion. Since being spun out of defense contractor Sierra Nevada Corporation in 2021, the company has "placed its bets on building out the growing space economy, from developing rocket propulsion technology to a commercial space station with Blue Origin." From the report: Its ambitions have fueled the development of its cargo space plane, the Dream Chaser, set to have its inaugural mission to the International Space Station (ISS) in the second half of this year. Built to land on any commercial runway, the plane will lower the barrier to entry into low-earth orbit and open up business opportunities, Vice said. "Since the 1960s, every science experiment or human being that's come back to earth from space, even today, is still landing in a capsule in the ocean," he said. "We think changing and revolutionizing the way that we bring things back from space, both humans and cargo, and landing [the spacecraft] back at a commercial runway will completely accelerate the new space economy."

"We believe that the next big breakthrough products in oncology, longevity, and industrialized components like glass will be produced in low Earth orbit," Vice said, noting that many of those opportunities are likely to come from the development of commercial space stations to replace the decades-old ISS. Sierra Space has partnered with Blue Origin to build out the Orbital Reef, a commercially owned and operated space station, though recent reports have hinted at tension between the corporate partners. "We're transitioning from decades of government-run space stations with just a handful of government-trained astronauts to the full commercialization of low Earth orbit," Vice said. "We think that's going to create, we believe, probably the most profound industrial revolution and grow that space economy well over a trillion dollars by 2040."

Earth

Saudi Arabia 'Forced To Scale Back' Plans For Desert Megacity (theguardian.com) 199

An anonymous reader quotes a report from The Guardian: It was billed as a glass-walled city of the future, an ambitious centerpiece of the economic plan backed by Crown Prince Mohammed bin Salman to transition Saudi Arabia away from oil dependency. Now, however, plans for the mirror-clad desert metropolis called the Line have been scaled down and the project, which was envisaged to stretch 105 miles (170km) is expected to reach just a mile and a half by 2030. Dreamed up as a linear city that would eventually be home to about 9 million people on a footprint of just 13 sq miles, the Line is part of a wider Neom project. Now at least one contractor has begun dismissing workers. The scaling down of Prince Mohammed's most grandiose project was reported by Bloomberg, which said it had seen documents relating to the project.
Earth

March Marks Yet Another Record In Global Heat (reuters.com) 158

According to the European Union, Earth has reached its warmest March on record, capping a 10-month streak in which every month set a new temperature record. Reuters reports: Each of the last 10 months ranked as the world's hottest on record, compared with the corresponding month in previous years, the EU's Copernicus Climate Change Service (C3S) said in a monthly bulletin. The 12 months ending with March also ranked as the planet's hottest ever recorded 12-month period, C3S said. From April 2023 to March 2024, the global average temperature was 1.58 degrees Celsius above the average in the 1850-1900 pre-industrial period.

C3S' dataset goes back to 1940, which the scientists cross-checked with other data to confirm that last month was the hottest March since the pre-industrial period. Already, 2023 was the planet's hottest year in global records going back to 1850. El Nino peaked in December-January and is now weakening, which may help to break the hot streak toward the end of the year. But despite El Nino easing in March, the world's average sea surface temperature hit a record high, for any month on record, and marine air temperatures remained unusually high, C3S said.
"The main driver of the warming is fossil fuel emissions," said Friederike Otto, a climate scientist at Imperial College London's Grantham Institute. Failure to reduce these emissions will continue to drive the warming of the planet, resulting in more intense droughts, fires, heatwaves and heavy rainfall, Otto said.
Technology

Fairphone's Fairbuds Are True Wireless Earbuds With Repairable Design, User-Replaceable Batteries (liliputing.com) 75

Fairphone, the Dutch smartphone maker known for its user-repairable smartphones, is bringing its ultra-repairable design philosophy to their "Fairbuds" wireless earbuds. Liliputing reports: The Fairbuds have the sort of features we've come to expect from premium earbuds. They're noise-cancelling Bluetooth 5.3 earbuds with support for wind noise reduction and an environmental noise-cancelling feature that sets noise reduction depending on your environment. Fairphone's earbuds have six microphones, 11mm drivers, and an IP54 rating for water (and sweat) resistance. They also support multipoint connectivity, which means you can connect the earbuds to two different devices at the same time (like your phone and your laptop).

The earbuds offer up to 6 hours of battery life and they come with a charging case that gives you another 20 hours of use between charges. And Fairphone offers iOS and Android apps that let you adjust EQ, install firmware updates, and make other changes. Other features include automatic play and pause when the Fairbuds are removed from your ears, capacitive touch controls, and three different ear tips sizes included in the box.

But the key thing that makes these earbuds different from the competition is that they're designed to be repairable rather than replaceable. Lose just one earbud? Fairphone will let you buy a single earbud without paying again for a full set with a case. Is your battery life degrading a few years after purchase? Fairphone will sell battery replacements and let you swap out the batteries in your earbuds or charging case. All told, the company offers seven repairable/replaceable components for the Fairbuds. The company also offers a 3-year warranty for its new Fairbuds and notes that they're manufactured using:

- 70% of all materials used in production are fair and recycled (fair = ethically sourced).
- 100% of rare earth elements used are recycled.
- Plastics used in the Fairbuds and their charging case are recycled.
The Fairbuds are currently only available in Europe for 149 euros.
United Kingdom

England Could Produce 13 Times More Renewable Energy, Using Less Than 3% of Land (theguardian.com) 222

England could produce 13 times more renewable energy than it does now, while using less than 3% of its land, analysis has found. The Guardian: Onshore wind and solar projects could provide enough electricity to power all the households in England two and a half times over, the research by Exeter University, commissioned by Friends of the Earth (FoE), suggested. Currently, about 17 terawatt hours of electricity a year comes from homegrown renewables on land. But there is potential for 130TWh to come from solar panels, and 96TWh from onshore wind. These figures are reached by only taking into account the most suitable sites, excluding national parks, areas of outstanding natural beauty, higher grade agricultural land and heritage sites.

Some commentators have argued that solar farms will reduce the UK's ability to grow its own food, but the new analysis suggests there is plenty of land that can be used without impairing agricultural production. More land is now taken up by golf courses than solar farms, and developers can be required to enhance biodiversity through simple measures such as maintaining hedgerows and ponds. Onshore windfarms were in effect banned in 2015 by the then prime minister, David Cameron. Rishi Sunak last year claimed to make moves towards lifting the ban, through small changes to the planning regulations, but campaigners say they were ineffectual and real planning reform is needed. No plans were submitted for new windfarms in England last year, and few new developments are coming forward, despite high gas prices, rising bills and onshore wind being the cheapest form of electricity generation.

Earth

One of Disneyland's Longest-Running Attractions is Ditching Fossil Fuels (reviewjournal.com) 99

When Disneyland opened in 1955, its car-themed attraction Autopia "represented the future of what would become America's multilane limited-access highways," according to Wikipedia, " which were still being developed. President Eisenhower had yet to sign the Interstate Highway legislation..."

Wikipedia adds that the cars "generate a moderate level of exhaust from the Honda GX gasoline engines that propel the cars." But that may change, according to a climate-oriented newsletter from the Los Angeles Times: If anyone could get away with defending the toxic odor, it might be Bob Gurr. He designed the original Autopia cars in the mid-1950s, working closely with Walt himself. He's proud of what they built together. But today the 92-year-old Disney legend says the polluting motors need to go. "Get rid of those God-awful gasoline fumes," he told me.

Disney is finally preparing to do just that. In news shared exclusively with The Times ahead of this column's publication — after several weeks of my prodding the company for answers on the future of Autopia — Disney officials revealed that pure gasoline engines are on their way out... "As the industry moves toward alternative fuel sources, we have developed a roadmap to electrify this attraction and are evaluating technology that will enable us to convert from gas engines in the next few years," spokesperson Jessica Good said in an email. Good wouldn't confirm whether that means electric vehicles, or if hybrids are a possibility...

[Gurr] also expressed a grander vision for Tomorrowland as a hub for stories about renewable energy, public transit and other sustainable technologies that will help us create a better tomorrow... [H]ow about using the former Innoventions building, which once displayed futuristic technologies but is now closed to most guests, to showcase solar panels, lithium-ion batteries and other clean energy devices that guests might want in their homes...? Why not switch to electric cooking at the Alien Pizza Planet restaurant, and offer induction stove demos for diners? Maybe start screening some National Geographic films (Disney owns NatGeo) at the largely unused Magic Eye Theater...? Add some infotainment-style signs and voice-overs about the wonders of clean energy and public transit, and boom, you've got a Tomorrowland that should leave kids and their parents excited to help build a safer, happier, more sustainable world...

[Gurr] told me that if he could, he'd tear out everything in Tomorrowland except the Monorail and rebuild it as a version of the public transit-oriented futuristic city that Walt once planned for Florida — only with clean energy at the core of its storytelling... At the very least, he said it's time for an Autopia where guests "don't smell the fumes, don't hear that racket of the little motor going putt-putt-putt."

The newsletter agrees electric vehicles for Autopia are "the obvious starting point" for remodeling Tomorrowland with "a buzz of optimism and futuristic energy." ("Solar-panel shade structures over the line would be great too.") They even add that "it's not that it's my job to make money for Disney, but I'm sure the company could find sponsors for this vision of Tomorrowland. There are plenty of renewable energy companies, electric utilities and environmental groups eager to tout their causes and their credentials."

And it shares this observation from climate scientist and communicator Katharine Hayhoe (paraphrasing another scientist who studies climate communications): "Showing people what climate solutions look like is one of the most effective ways to get them to support action." The newsletter's conclusion? "This is where Tomorrowland could prove especially valuable in the fight to save the planet."


Some additional context... Disney's current CEO once said he was "particuarly proud" of the 270-acre, 50+-megawatt solar facility the company brought online in Orlando." And the Washington Post reports that Disney's plans to electrify Autopia "comes as the park is taking steps to decarbonize as part of an effort to reach a goal of net-zero emissions by 2030."
Space

VCs Invest $90M in Varda Space Industries' Microgravity Drug Manufacturing (techcrunch.com) 20

"Varda Space Industries has closed a massive tranche of funding," reports TechCrunch, "just weeks after its first drug manufacturing capsule returned from orbit."

Varda has now raised $145 million to date, the article points out, and the $90 million in new Series B funding "marks an inflection point for the company, which is now gearing up to scale from the initial demonstration mission to a regular set of missions carrying customer payloads, Varda founder Delian Asparouhov told TechCrunch." El Segundo-based Varda was founded in 2021 by Asparouhov, who is also a partner at Founders Fund, and Will Bruey, a spacecraft engineer who cut his teeth at SpaceX. The pair had an audacious goal to commercialize what until very recently was promising but ultimately small-scale research into the effects of microgravity on pharmaceutical crystals... Astronauts have been conducting protein crystallization experiments in space for decades on the International Space Station and before that, the Space Shuttle. But the business case for expanding this research has never materialized — until now...

Part of the reason Varda is possible today is due to the availability of regular, low-cost rideshare launches from SpaceX and Rocket Lab's innovations in satellite bus manufacturing. Even beyond these external partnerships, the startup has made significant headway in its own right, as the success of the first mission showed: Their reentry capsule appears to have performed flawlessly and the experiment to reformulate the HIV medicine ritonavir was executed without a hitch, it says. Varda has also started publishing the results of its internal R&D efforts, including a scientific paper on its hyper-gravity (as opposed to microgravity) crystallization platform, which the startup developed as a sort of screening method prior to sending drugs to space. [The paper is titled "Gravity as a Knob for Tuning Particle Size Distributions of Small Molecules."] It's an entirely new field of research that takes advantage of the ability to truly unlock gravity as a variable in scientific experiments. "Over time, we will be able to generate data sets between both hyper-gravity and microgravity and start to show correlations," he said....

In a recent podcast appearance, he specified that the all-in initial mission cost around $12 million, which will drop to $5-6 million by mission 4 and $2.5 million or less by mission 10.) Larger capsules are also in the longer-term pipeline, though also not until the 2027 time frame. Asparouhov also confirmed that pharmaceuticals will be Varda's sole focus for the next 10-20 (or more) years, based on the company's conviction that pharmaceutical products will generate more economic value compared to other materials. A lot of that comes down to the fact that there are a significant set of drugs that require only a "seed" of the material that can only be made in microgravity, and the rest of the drug formulation can be completed here on Earth...

The company is also aiming to improve the processing capabilities of the on-board pharmaceutical reactor. The first mission carried just one drug protein, but in the future the company hopes to process multiple drug products that could be run through different processing regimes. In the future, other missions could carry larger reactors for drugs that do need more than the "seed" crystal, and those mission profiles would be closer to something like mass manufacturing.

Varda already has "a handful" of signed contracts with biotech companies, according to the article — and Varda's next manufacturing mission "will launch later this year."
United States

US Energy Department Announces 'Blueprint' for Slashing Emissions From Buildings and Reducing Energy Use (energy.gov) 76

This week America's Department of Energy announced "a comprehensive plan to reduce greenhouse-gas emissions from buildings by 65% by 2035 and 90% by 2050." The U.S. Department of Energy (DOE) led the Blueprint's development in collaboration with the Department of Housing and Urban Development, the Environmental Protection Agency, and other federal agencies. The Blueprint is the first sector-wide strategy for building decarbonization developed by the federal government... "America's building sector accounts for more than a third of the harmful emissions jeopardizing our air and health..." said U.S. Secretary of Energy Jennifer M. Granholm. "As part of a whole-of-government approach, the Department of Energy is outlining for the first time ever a comprehensive federal plan to reduce energy in our homes, schools, and workplaces — lowering utility bills and creating healthier communities while combating the climate crisis."

Buildings account for more than one third of domestic climate pollution and $370 billion in annual energy costs... The Blueprint projects reductions of 90% of total greenhouse gas emissions from the buildings sector, which will save consumers more than $100 billion in annual energy costs and avoid $17 billion in annual health costs.

Just for example, the Department of Energy's Affordable Home Energy Shot program "aims to reduce the upfront cost of upgrading a home by at least 50% and reduce energy bills by 20% within a decade." (Meanwhile, the federal government's role in making more change happen faster includes financing, funding R&D on lower-cost technologies, expanding markets, and "supporting the development and implementation of emissions-reducing building codes and appliance standards.")

Besides the national blueprint, the Department also announced an expansion of its Better Buildings Commercial Building Heat Pump Accelerator initiative. In this program, "manufacturers will produce higher efficiency and life cycle cost-effective heat pump rooftop units and commercial organizations will evaluate and adopt next-generation heat pump technology."

U.S. Secretary of Energy Jennifer M. Granholm said the program "builds on more than a decade of public-private partnerships to get cutting edge clean technologies from lab to market, helping to slash harmful carbon emissions throughout our economy." On average, between 20% and 30% of the nation's energy is wasted, presenting a significant opportunity to increase energy efficiency. Through the Better Buildings Initiative, DOE partners with public and private sector stakeholders to pursue ambitious portfolio-wide energy, waste, water, and/or emissions reduction goals and publicly share solutions. By improving building design, materials, equipment, and operations, energy efficiency gains can be achieved across broad segments of the nation's economy.

The Accelerator initiative was developed with commercial end users like Amazon, IKEA, and Target, and already includes manufacturers AAON, Carrier Global Corp., Lennox International, Rheem Manufacturing Co., Trane Technologies, and York International Corp. The Accelerator aims to bring more efficient, affordable next-generation heat pump rooftop units to market as soon as 2027 — which will slash both emissions and energy costs in half compared to natural gas-fueled heat pumps. If deployed at scale, they could save American businesses and commercial entities $5 billion on utility bills every year.

Earth

Wait, Does America Suddenly Have a Record Number of Bees? (spokesman.com) 77

"America's honeybee population has rocketed to an all-time high," reports the Washington Post: We've added almost 1 million bee colonies in the past five years. We now have 3.8 million, the census shows. Since 2007, the first census after alarming bee die-offs began in 2006, the honeybee has been the fastest-growing livestock segment in the country! And that doesn't count feral honeybees, which may outnumber their captive cousins several times over...

Much of the explosion of small producers came in just one state: Texas. The Lone Star State has gone from having the sixth-most bee operations in the country to being so far ahead of anyone else that it out-bees the bottom 21 states combined... [A]ll 254 Texas counties adopted bee rules requiring, for example, six hives on five acres plus another hive for every 2.5 acres beyond that to qualify for the tax break...

When the census was taken in December 2022, California had more than four times as many bees as any other state. We emailed pollination expert Brittney Goodrich at the University of California at Davis, who explained that pollinating the California almond crop "demands most of the honeybee colonies in the U.S. each year...

Sadly, however, this does not mean we've defeated colony collapse. One major citizen-science project found that beekeepers lost almost half of their colonies in the year ending in April , the second-highest loss rate on record. For now, we're making up for it with aggressive management. The Texans told us that they were splitting their hives more often, replacing queens as often as every year and churning out bee colonies faster than the mites, fungi and diseases can take them down. But this may not be good news for bees in general. "It is absolutely not a good thing for native pollinators," said Eliza Grames, an entomologist at Binghamton University, who noted that domesticated honeybees are a threat to North America's 4,000 native bees, about 40% of which are vulnerable to extinction...

Many of the same forces collapsing managed beehives also decimate their native cousins, only the natives don't usually have entire industries and governments pouring hundreds of millions of dollars into supporting them.

So while Texas bee exemptions "have become big business," the article ends with this quote from Mace Vaughan, who leads pollinator and agricultural biodiversity at Xerces, an expanding insect-conservation outfit. "The way you support both honeybees and beekeepers — and the way you save native pollinators — is to go out there and create beautiful flower-rich habitat on your farm or your garden."
Space

How the European Space Agency Celebrated April Fool's Day (esa.int) 41

The European Space Agency has a Planetary Defence Office, which includes its Near-Earth Object Coordination Centre. "It has come to our attention," they wrote in the April edition of their monthly newsletter, "that a recent trend among journalists has been to come up with creative comparisons to convey the size of an asteroid to the public."

So then, as explained by RockDoctor (Slashdot reader #15,477) "they propose a number of standardised units of comparison for journalists describing 'death from the skies'".

An excerpt from that April 1 newsletter: In the absence of a handy skyscraper, animals commonly used have included giraffes, corgis and an entire colony of penguins. But how do these comparisons stack up? Let's look at some of our favourite unusual suspects:

- Corgi: At around 30 cm tall, a space rock the size of a corgi wouldn't pose much of a threat.

- Half a giraffe: An adult giraffe can reach up to 5.5 metres in height, so half a giraffe would be about 2.75 metres. While not as impressive as a full skyscraper, an asteroid that size could certainly destroy a building or two...

- Elephants: An adult African elephant can reach 7 metres at the shoulder. Ninety elephants stacked on top of each other would form a staggering pile over 630 metres high, creating a devastating but probably not planet-ending event.

As this menagerie of animals can cause a lot of confusion, we at the NEOCC recommend the use of a Standardised Giraffe Unit (SGU, 1 SGU = 5 penguins) for ease of comparison.

RockDoctor shares this additional thought in his original submission about the newly proposed standardized unit.

"The world may be turtles all the way down, but it's giraffes all the way up."
United States

US Invests $20 Billion More to Finance Clean-Energy Projects (msn.com) 86

Thursday America's Environmental Protection Agency "awarded $20 billion to help finance clean-energy projects across the country," reports the Washington Post. The money comes from the Greenhouse Gas Reduction Fund established by President Biden's signature climate law, the Inflation Reduction Act. The fund seeks to leverage public and private dollars to invest in clean-energy technologies such as solar panels, heat pumps and more.

The program is potentially one of the most consequential — yet least understood — parts of the climate law...

Simply put, the program allows people to access low-interest loans for clean-energy projects that they might not otherwise have received. Imagine a community group that wants to install electric vehicle charging stations at its neighborhood recreation center but can't get a loan from a bank or a lender. As is often the case, potential lenders say they're hesitant to support a novel green technology or a business without a track record of success. Low-income and minority communities have long encountered such obstacles in trying to attract private capital. The program aims to overcome this problem by providing a huge influx of federal cash — $27 billion in total — for nonprofit organizations to dole out to clean-energy projects nationwide. Each nonprofit will serve as a "green bank" that offers more favorable lending rates than commercial banks. "It's just really hard to get banks to bring capital into low-income communities, especially for these new projects that they're not used to financing," said Adrian Deveny, the founder of the firm Climate Vision and the former director of energy and environmental policy for Senate Majority Leader Charles E. Schumer (D-N.Y.), a key architect of the Inflation Reduction Act....

The EPA is awarding money to eight nonprofits, which have committed to leverage nearly $7 in private capital for every $1 of federal investment. The nonprofits have also pledged to ensure that at least 70 percent of the funds will benefit disadvantaged communities, and that the financed projects will reduce up to 40 million metric tons of carbon dioxide a year — equivalent to the annual emissions of nearly 9 million gasoline-powered cars... [The nonprofit] Coalition for Green Capital, will use a $5 billion award to establish a "national green bank," co-founder and CEO Reed Hundt said. "We're going to be able to cause about $100 billion of total additional investment over a seven-year time period with that number, because we can leverage it," Hundt said.

Communications

NASA Figured Out Why Its Voyager 1 Probe Has Been Glitching for Months (gizmodo.com) 58

NASA engineers have traced the Voyager 1 spacecraft's transmitted gibberish to corrupted memory hardware in its flight data system (FDS). "The team suspects that a single chip responsible for storing part of the affected portion of the FDS memory isn't working," NASA wrote in an update. Gizmodo reports: FDS collects data from Voyager's science instruments, as well as engineering data about the health of the spacecraft, and combines them into a single package that's transmitted to Earth through one of the probe's subsystems, the telemetry modulation unit (TMU), in binary code. FDS and TMU have been having trouble communicating with one another. As a result, TMU has been sending data to mission control in a repeating pattern of ones and zeroes. NASA's engineers aren't quite sure what corrupted the FDS memory hardware; they think that either the chip was hit by an energetic particle from space or that it's just worn out after operating for 46 years. [...] The engineers are hoping to resolve the issue by finding a way for FDS to operate normally without the corrupted memory hardware, enabling Voyager 1 to begin transmitting data about the cosmos and continue its journey through deep space.
Earth

Heat-Trapping CO2, Methane Levels In the Air Last Year Spiked To Record Highs (apnews.com) 81

According to the latest data from the U.S. National Oceanic and Atmospheric Administration, carbon dioxide and methane levels in the atmosphere reached historic highs last year, growing at near-record fast paces. The Associated Press reports: Carbon dioxide, the most important and abundant of the greenhouse gases caused by humans, rose in 2023 by the third highest amount in 65 years of record keeping, NOAA announced Friday. Scientists are also worried about the rapid rise in atmospheric levels of methane, a shorter-lived but more potent heat-trapping gas. Both jumped 5.5% over the past decade. The 2.8 parts per million increase in carbon dioxide airborne levels from January 2023 to December, wasn't as high as the jumps were in 2014 and 2015, but they were larger than every other year since 1959, when precise records started. Carbon dioxide's average level for 2023 was 419.3 parts per million, up 50% from pre-industrial times.

Last year's methane's jump of 11.1 parts per billion was lower than record annual rises from 2020 to 2022. It averaged 1922.6 parts per billion last year. It has risen 3% in just the past five years and jumped 160% from pre-industrial levels showing faster rates of increase than carbon dioxide, said Xin "Lindsay" Lan, the University of Colorado and NOAA atmospheric scientist who did the calculations. [...] The third biggest human-caused greenhouse gas, nitrous oxide, jumped 1 part per billion last year to record levels, but the increases were not as high as those in 2020 and 2021. Nitrous oxide, which lasts about a century in the atmosphere, comes from agriculture, burning of fuels, manure and industrial processes, according to the EPA.

"Studies of the specific isotopes of methane in the air show much of the increased methane is from microbes, pointing to spiking emissions from wetlands and perhaps agriculture and landfills, but not as much the energy industry, Lan said."
Mars

Mars May Not Have Had Liquid Water Long Enough For Life To Form (arstechnica.com) 53

Elizabeth Rayne reports via Ars Technica: Led by planetary researcher Lonneke Roelofs of Utrecht University in the Netherlands, a team of scientists has found that the sublimation of CO2 ice could have shaped Martian gullies, which might mean the most recent occurrence of liquid water on Mars may have been further back in time than previously thought. That could also mean the window during which life could have emerged and thrived on Mars was possibly smaller. "Sublimation of CO2 ice, under Martian atmospheric conditions, can fluidize sediment and creates morphologies similar to those observed on Mars," Roelofs and her colleagues said in a study recently published in Communications Earth & Environment. [...]

To recreate a part of the red planet's landscape in a lab, Roelofs built a flume in a special environmental chamber that simulated the atmospheric pressure of Mars. It was steep enough for material to move downward and cold enough for CO2 ice to remain stable. But the team also added warmer adjacent slopes to provide heat for sublimation, which would drive movement of debris. They experimented with both scenarios that might happen on Mars: heat coming from beneath the CO2 ice and warm material being poured on top of it. Both produced the kinds of flows that had been hypothesized. For further evidence that flows driven by sublimation would happen under certain conditions, two further experiments were conducted, one under Earth-like pressures and one without CO2 ice. No flows were produced by either. "For the first time, these experiments provide direct evidence that CO2 sublimation can fluidize, and sustain, granular flows under Martian atmospheric conditions," the researchers said in the study.

Because this experiment showed that gullies and systems like them can be shaped by sublimation and not just liquid water, it raises questions about how long Mars had a sufficient supply of liquid water on the surface for any organisms (if they existed at all) to survive. Its period of habitability might have been shorter than it was once thought to be. Does this mean nothing ever lived on Mars? Not necessarily, but Roelofs' findings could influence how we see planetary habitability in the future.

Sci-Fi

How a Micro-Budget Student Film Changed Sci-Fi Forever (bbc.com) 44

An anonymous reader writes: In the early 70s, young filmmakers John Carpenter and Dan O'Bannon created a spaceship tale for a graduation project -- little knowing it would influence Alien and many other works. Made for $60,000 by film school students, horror maestro John Carpenter's directorial debut Dark Star is now regarded as a sci-fi cult classic. Having just turned 50 years old, it's a world away from much of the sci-fi that came before it and would come after, neither space odyssey nor space opera, rather a bleak, downbeat and often absurd portrait of a group of people cooped together in a malfunctioning interstellar tin can. Arguably its most famous scene consists of an existential debate between an astronaut and a sentient bomb. Dark Star was a collaboration between Carpenter, who directed and scored the film, and Dan O'Bannon, who in addition to co-writing the script, acted as editor, production designer, and visual effects supervisor, as well as playing the volatile, paranoid Sergeant Pinback. They met as budding filmmakers at the University of Southern California. "While [Carpenter and O'Bannon] couldn't be more dissimilar in personality, they were both very energetic and focused," says Daniel Griffiths, director of Let There Be Light: The Odyssey of Dark Star (2010), the definitive documentary about the making of the film.

The sci-fi films of this period tended to be bleak and dystopian, explains John Kenneth Muir, author of The Films of John Carpenter -- films like Silent Running (1972), in which all plant life on Earth is extinct, or George Lucas's 1971 debut THX-1138, in which human emotion is suppressed. "Dark Star arrived in this world of dark, hopeless imaginings, but took the darkness one step further into absurd nihilism." Carpenter and O'Bannon set out to make the "ultimate riff on Stanley Kubrick's 2001: A Space Odyssey," says Griffiths. While Kubrick's 1968 film, explains Muir, was one "in which viewers sought meaning in the stars about the nature of humanity, there is no meaning to life in Dark Star". Rather, says Muir, it parodies 2001 "with its own sense of man's irrelevance in the scheme of things". Where Kubrick scored his film with classical music, Dark Star opens with a country song, Benson, Arizona. (A road in the real-life Benson is named in honor of the film). The film was even released with the tagline "the spaced-out odyssey." Dark Star captured the mood of the time in which it was made, says Muir, the atmosphere of Nixon's America. "The 1960s was all about utopian dreaming and bringing change to America in the counterculture. The 1970s represent what writer Johnny Byrne called 'The wake-up from the hippie dream', a reckoning with the fact that the more things change, the more they stay the same." [...]

When Dark Star premiered at the FILMEX expo in 1974, the audience response was largely positive. "They recognized the film's absurdist humor and celebrated its student film roots," says Griffiths. It had a limited theatrical release in 1975, but it was not a commercial success. "The film met with negative reviews from critics, and general disinterest from audiences," says Muir. "Both Carpenter and O'Bannon realized that all the struggles they endured to make the film did not matter to audiences, they only cared about the finished product. I think they were discouraged," says Griffiths. The growth of the VHS market, however, helped it find its audience and propelled it towards cult status. Its influence can still be felt, perhaps most directly in Ridley Scott's Alien, for which O'Bannon, who died in 2009, wrote the screenplay. The two films share DNA. Alien is also set on a grotty working vessel with a bickering crew, only this time the alien wasn't played for laughs.

Earth

Amazon Still Has a Serious Plastic Waste Problem in the US (theverge.com) 36

Despite making pledges to cut down on plastic packaging, a new report from the nonprofit conservation organization Oceana estimates that Amazon's plastic waste has continued to grow in the US. From a report: The company created 208 million pounds of plastic waste from its packaging in the US in 2022 alone, which Oceana says is enough trash to circle Earth more than 200 times in the form of plastic air pillows. That's a nearly 10 percent jump from the amount of plastic waste it generated the year before, according to the report. The US is a worrying outlier for Amazon, Oceana says. Globally, the e-commerce giant says that it reduced its use of plastic packaging 11.6 percent in 2022 compared to the prior year. But the US is the company's biggest market, and Oceana argues it's where Amazon needs to make a lot more progress.
Earth

Only 57 Companies Produced 80% of Global Carbon Dioxide (carbonmajors.org) 167

Last year was the hottest on record and the Earth is headed towards a global warming of 2.7 degrees, yet top fossil fuel and cement producers show a disregard for climate change and actively make things worse. From a report: A new Carbon Majors Database report found that just 57 companies were responsible for 80 percent of the global carbon dioxide emissions between 2016 and 2022. Thirty-eight percent of total emissions during this period came from nation-states, 37 percent from state-owned entities and 25 percent from investor-owned companies.

Nearly 200 parties adopted the 2015 Paris Agreement, committing to reduce greenhouse gas emissions. However, 58 of the 100 state- and investor-owned companies in the Carbon Majors Database have increased their production in the years since (The Climate Accountability Institute launched Carbon Majors in 2013 to hold fossil fuel producers accountable and is hosted by InfluenceMap). This number represents producers worldwide, including 87 percent of those assessed in Asia, 57 percent in Europe and 43 percent in North America.

It's not a clear case of things slowly turning around, either. The International Energy Agency found coal consumption increased by eight percent over the seven years to 8.3 billion tons -- a record high. The report names state-owned Coal India as one of the top three carbon dioxide producers. Russia's state-owned energy company Gazprom and state-owned oil firm Saudi Aramco rounded out the trio of worst offenders.

Moon

NASA Picks 3 Companies to Help Astronauts Drive Around the Moon (nytimes.com) 23

NASA announced on Wednesday that they have selected three companies to develop preliminary designs for vehicles to take astronauts around the south polar region of the Moon. "After the astronauts return to Earth, these vehicles would be able to self-drive around as robotic explorers, similar to NASA's rovers on Mars," reports the New York Times. "The self-driving capability would also allow the vehicle to meet the next astronaut mission at a different location." From the report: The companies are Intuitive Machines of Houston, which in February successfully landed a robotic spacecraft on the moon; Lunar Outpost of Golden, Colo.; and Venturi Astrolab of Hawthorne, Calif. Only one of the three will actually build a vehicle for NASA and send it to the moon. NASA had asked for proposals of what it called the lunar terrain vehicle, or L.T.V., that could drive at speeds up to 9.3 miles per hour, travel a dozen miles on a single charge and allow astronauts to drive around for eight hours. The agency will work with the three companies for a year to further develop their designs. Then NASA will choose one of them for the demonstration phase. The L.T.V. will not be ready in time for the astronauts of Artemis III, the first landing in NASA's return-to-the-moon program, which is currently scheduled for 2026.

The plan is for the L.T.V. to be on the lunar surface ahead of Artemis V, the third astronaut landing that is expected in 2030, said Lara Kearney, manager of the extravehicular activity and human surface mobility program at the NASA Johnson Space Center. "If they can get there earlier, we'll take it earlier," Ms. Kearney said. The L.T.V. contract will be worth up to $4.6 billion over the next 15 years -- five years of development and then a decade of operations on the moon, most of it going to the winner of this competition. But Ms. Kearney said the contracts allow NASA to later finance the development of additional rovers, or allow other companies to compete in the future.

Moon

NASA To Create Time Standard For the Moon (reuters.com) 75

artmancc writes: The White House has directed NASA and other federal agencies to get to work on a plan to implement precision timekeeping and dissemination on the moon and elsewhere in space. Reuters cited a memo from the head of the White House Office of Science and Technology Policy (OSTP) that "instructed the space agency to work with other parts of the U.S. government to devise a plan by the end of 2026 for setting what it called a Coordinated Lunar Time (LTC). The name of the proposed time standard is similar to the terrestrial time standard known as Coordinated Universal Time (UTC).

"OSTP chief Arati Prabhakar's memo said that for a person on the moon, an Earth-based clock would appear to lose on average 58.7 microseconds per Earth-day and come with other periodic variations that would further drift moon time from Earth time," Reuters reported. An unidentified OSTP official said the lunar time standard is needed for secure and synchronized communication between astronauts, satellites orbiting the moon, and Earth.

ISS

Trash From the ISS May Have Hit a House In Florida (arstechnica.com) 135

A nearly two-pound piece of trash from the International Space Station may have hit a house in Florida. Alejandro Otero said it "tore through the roof and both floors of his two-story house in Naples, Florida," reports Ars Technica. "Otero wasn't home at the time, but his son was there." From the report: A Nest home security camera captured the sound of the crash at 2:34 pm local time (19:34 UTC) on March 8. That's an important piece of information because it is a close match for the time -- 2:29 pm EST (19:29 UTC) -- that US Space Command recorded the reentry of a piece of space debris from the space station. At that time, the object was on a path over the Gulf of Mexico, heading toward southwest Florida. This space junk consisted of depleted batteries from the ISS, attached to a cargo pallet that was originally supposed to come back to Earth in a controlled manner. But a series of delays meant this cargo pallet missed its ride back to Earth, so NASA jettisoned the batteries from the space station in 2021 to head for an unguided reentry.

Otero's likely encounter with space debris was first reported by WINK News, the CBS affiliate for southwest Florida. Since then, NASA has recovered the debris from the homeowner, according to Josh Finch, an agency spokesperson. Engineers at NASA's Kennedy Space Center will analyze the object "as soon as possible to determine its origin," Finch told Ars. "More information will be available once the analysis is complete." [...] In a post on X, Otero said he is waiting for communication from "the responsible agencies" to resolve the cost of damages to his home.

If the object is owned by NASA, Otero or his insurance company could make a claim against the federal government under the Federal Tort Claims Act, according to Michelle Hanlon, executive director of the Center for Air and Space Law at the University of Mississippi. "It gets more interesting if this material is discovered to be not originally from the United States," she told Ars. "If it is a human-made space object which was launched into space by another country, which caused damage on Earth, that country would be absolutely liable to the homeowner for the damage caused." This could be an issue in this case. The batteries were owned by NASA, but they were attached to a pallet structure launched by Japan's space agency.

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