An anonymous reader quotes a report from Vox: Meta will conduct another mass round of layoffs on Wednesday, several sources working at the company told Vox. In an internal memo posted to a Meta employee message board on Tuesday evening and viewed by Vox, the company told employees that the layoffs will start on Wednesday and will impact a wide range of technical teams including those working on Facebook, Instagram, Reality Labs, and WhatsApp. A Meta spokesperson confirmed the memo was sent to employees but declined to comment further. The cuts could be in the range of 4,000 jobs, one source said.

"This will be a difficult time as we say goodbye to friends and colleagues who have contributed so much to Meta," Lori Goler, Meta's head of people, said in the memo. Meta employees in North America will be notified by email between 4 am to 5 am PT Wednesday morning, according to Goler's note. Outside of North America, the timelines will vary country to country, and some countries will not be impacted. Meta is also asking employees in North America, whose job allow it, to work from home on Wednesday to give people "space to process the news." "The layoffs come after Meta CEO Mark Zuckerberg said in March that the company would cut 10,000 more jobs in the coming months, after already cutting 11,000 in November," notes Vox.

Today, Sonos is introducing Sonos Pro, a new service targeted at businesses -- restaurants, bars, and retail stores -- that makes it easy to play music across numerous locations without breaking any licensing rules. Sonos Pro works with all S2-compatible hardware including the Ikea Symfonisk line and, if you're into retrofitting existing speakers, the Amp and Port. The Verge reports: Pro customers will gain access to a web portal that lets them remotely control what's playing in each of their locations (divided into different zones) and perform troubleshooting from afar. If you're a normal consumer and want to reset your Sonos system at home, you've got to unplug the products, but Pro customers will be able to do it with software. They'll also have the ability to schedule particular genres for different times of the day to lock in the right atmosphere for their business. Want to keep the volume low in the mornings when you've got less foot traffic and automatically raise it during peak hours? Sonos Pro can do that.

The monthly Sonos Pro subscription, priced at $35 per business location, will include "Sonos Backgrounds." This is a commercially licensed music service featuring a range of royalty-free music from independent artists that's all legally compliant for streaming at business establishments. If you're wondering why that's necessary, businesses technically aren't allowed to just start playing Spotify, Apple Music, or other mainstream music apps over their speakers. Spotify says so right here. Those services are only licensed for personal use; playing them in a public setting counts as a live performance, and that's a no-no unless you've paid for the necessary licenses from ASCAP, BMI, and other organizations. That can get extremely complicated in and of itself.

The service will provide deep, granular control over the entire system in a commercial space. You can set maximum volume limits for each speaker or enable / disable features like AirPlay, line-in playback, and more. If you want to give your staff access to Spotify after hours, that's doable with an "allow direct control" setting. Speaking of which, business owners can grant their employees access to Sonos Pro and set different permission tiers for each person. And again, this can all be done remotely. Try adjusting settings (or even switching your Wi-Fi network) for Sonos devices on a regular account, and it can get messy fast. If you're away from the devices, forget about it.

An anonymous reader shares a report: We know from natural events in the past that increasing the amount of iron in these seas can dramatically increase the growth of phytoplankton. When iron-rich ash from volcanic eruptions has fallen on the ocean's surface, it has triggered phytoplankton blooms large enough to see from space. This knowledge led oceanographer John Martin to put forth something called the "iron hypothesis," which suggests that "fertilizing" the ocean with iron could increase the amount of carbon-sucking phytoplankton -- theoretically enough to cool the entire Earth. "Give me a half tanker of iron, and I will give you an ice age," he famously quipped during a lecture in 1988.

In 1993, shortly after Martin's death, his colleagues at Moss Landing Marine Laboratories tested the hypothesis by increasing the concentration of iron over 64 square kilometers of the Pacific Ocean. They then observed the area for 10 days and saw the amount of plant biomass double. "All biological indicators confirmed an increased rate of phytoplankton production in response to the addition of iron," they wrote in a paper detailing the experiment. More than a dozen other ocean fertilization experiments have been conducted since then, but even though they do appear to cause a bloom of plankton, it's still not clear whether the approach could actually help combat climate change.

In 2009, researchers from the Department of Energy's Lawrence Berkeley National Laboratory tracked the impact of a major ocean fertilization experiment in the Southern Ocean between New Zealand and Antarctica by measuring carbon particles 800 meters below the surface of the water in the area for a year -- and their findings were less than encouraging. "Just adding iron to the ocean hasn't been demonstrated as a good plan for storing atmospheric carbon," said researcher Jim Bishop. "What counts is the carbon that reaches the deep sea, and a lot of the carbon tied up in plankton blooms appears not to sink very fast or very far." While researchers are still trying to figure out why that is, there are a number of theories, including ones centered on the feeding habits of creatures that live off phytoplankton and the presence of iron-binding organic compounds in ocean water.

A team of scientists led by Slava Turyshev of the Jet Propulsion Laboratory at the California Institute of Technology have proposed merging miniature satellite units with a solar energy process that would create a fast, inexpensive, lightweight mode of travel. Phys.Org reports: Solar sailing is a process by which the pressure generated by the sun's radiation is harnessed for propulsion. Recent innovations in this technology were demonstrated in a successful crowdfunded 2019 mission undertaken by the Planetary Society's LightSail-2 project. The researchers explain, "Solar sails obtain thrust by using highly reflective, lightweight materials that reflect sunlight to propel a spacecraft while in space. The continuous photon pressure from the sun provides thrust, eliminating the need for heavy, expendable propellants employed by conventional on-board chemical and electric propulsion systems, which limit mission lifetime and observation locations."

They say that sails are far less expensive than heavy equipment currently used for propulsion, and that the ever-present continuous solar photon pressure from the sun makes thrust available for a broad range of vehicular maneuvers, such as hovering or rapid orbital plane changes. Solar sails and miniaturization "have advanced in the past decade to the point where they may enable inspiring and affordable missions to reach farther and faster, deep into the outer regions of our solar system," the report says.

The researchers refer to the merging of these two technologies as the Sundiver Concept. "Fast, cost-effective and maneuverable sailcraft that may travel outside the ecliptic plane open new opportunities for affordable solar system exploration," the report states, "with great promise for heliophysics, planetary science, and astrophysics." With enhanced maneuverability, the spacecraft can easily deliver small payloads to multiple destinations if required, and can dock with related modular craft. The reliance on the sun and the miniaturization of the carrier, which requires no dedicated launch site, will prove to be significant cost savers, the researchers add: "A substantial reason for the high costs is our [current] reliance on slow and expensive chemical propulsion, operating at the limits of its capabilities, effectively rendering the current solar system exploration paradigm unsustainable. A new approach is needed."

"Two years have passed since the Perseverance rover landed on Mars, carrying with it the Ingenuity helicopter," notes Slashdot reader quonset. "Created from off-the-shelf components, the helicopter was only designed to last about five flights. Instead, two years later, having become the first aircraft to fly and land on another planet, Ingenuity successfully completed its 50th flight."

CNN reports that the 4-pound (1.8-kilogram) helicopter has now "surpassed all expectations," transitioning into "an aerial scout for the Perseverance rover as it explores an ancient lake and river delta on Mars." Each morning, the Helicopter Base Station on the Perseverance rover searches for Ingenuity's signal around the time the chopper is expected to "wake up," waiting for a sign that its aerial scout is still functioning. But Ingenuity's solar panels, batteries and rotor system are healthy. The chopper is "still doing fantastic," said Teddy Tzanetos, Ingenuity team lead at NASA's Jet Propulsion Laboratory. "We're looking forward to just keep pushing that envelope."

Since the helicopter left the flat floor of Jezero Crater and headed to the river delta in January, its flights have only grown more challenging. Ingenuity has flown over uncharted and rugged terrain with landing spots surrounded by potential hazards. "We are not in Martian Kansas anymore," said Josh Anderson, Ingenuity operations lead at JPL, in a statement. "We're flying over the dried-up remnants of an ancient river that is filled with sand dunes, boulders, and rocks, and surrounded by hills that could have us for lunch. And while we recently upgraded the navigation software onboard to help determine safe airfields, every flight is still a white-knuckler...."

Ingenuity's team is already planning its next set of flights because the chopper has to remain at the right distance to stay in touch with the fast-moving rover, which can drive for hundreds of meters in a single day... The Perseverance rover is moving on from an area that could contain hydrated silica, which might have information about a warmer, wetter Martian past and any potential signs of life from billions of years ago. Up next is Mount Julian, a site that will provide the rover with a panoramic view into Belva Crater.

Ingenuity's journey has demonstrated how useful aircraft can be on space missions, scouting places that rovers can't go or helping plot a safe path to the next destination.

SharewareHeroes.com recreates all the fonts and cursor you'd see after dialing up a local bulletin-board system in the early 1990s. It's to promote a new book — successfully crowdfunded by 970 backers — to chronicle "a critical yet long overlooked chapter in video game history: the rise and eventual fall of the shareware model.

The book promises to explore "a hidden games publishing market" that for several years "had no powerful giants," with games instead distributed "across the nascent internet for anyone to enjoy (and, if they liked it enough, pay for)."

And the site features a free excerpt from the chapter about DOOM: It seemed there was no stopping id Software. Commander Keen had given them their freedom, and Wolfenstein 3D's mega-success had earned them the financial cushion to do anything. But all they wanted was to beat the last game — to outdo both themselves and everyone else. And at the centre of that drive was a push for ever-better technology. By the time Wolfenstein 3D's commercial prequel Spear of Destiny hit retail shelves, John Carmack had already built a new engine.

This one had texture-mapped floors and ceilings — not just walls. It supported diminished lighting, which meant things far away could recede into the shadows, disappearing into the distance. And it had variable-height rooms, allowing for elevated platforms where projectile-throwing enemies could hang out, and most exciting of all it allowed for non-orthogonal walls — which meant that rooms could be odd-shaped, with walls jutting out at any arbitrary angle from each other, rather than the traditional rectangular boxed design that had defined first-person-perspective games up until then.

It ran at half the speed of Wolfenstein 3D's engine, but they were thinking about doing a 3D Keen game next — so that wouldn't matter. At least not until they saw it in action. Everyone but Tom Hall suddenly got excited about doing another shooter, which meant Carmack would have to optimise the hell out of his engine to restore that sense of speed. Briefly they considered a proposal from 20th Century Fox to do a licensed Aliens shooter, but they didn't like the idea of giving up their creative independence, so they considered how they could follow up Wolfenstein 3D with something new. Fighting aliens in space is old hat. This time it could be about fighting demons in space. This time it could be called DOOM.
The book's title is Shareware Heroes: The Renegades Who Redefined Gaming at the Dawn of the Internet — here's a page listing the people interviewed, as well as the book's table of contents.

And this chapter culminates with what happened when the first version of DOOM was finally released. "BBSs and FTP servers around America crashed under the immense load of hundreds of thousands of people clamouring to download the game on day one.

"Worse for universities around the country, people were jumping straight into the multiplayer once they had the game — and they kept crashing the university networks..."

Virginia Norwood, an aerospace pioneer who invented the scanner that has been used to map and study the earth from space for more than 50 years, has died at her home in Topanga, Calif. She was 96. The New York Times reports: Her death was announced by the United States Geological Survey, whose Landsat satellite program relies on her invention. Her daughter, Naomi Norwood, said her mother was found dead in her bed on the morning of March 27. The Landsat satellites, speeding 438 miles above the surface, orbit the earth every 99 minutes and have captured a complete image of the planet every 16 days since 1972. These images have provided powerful visual evidence of climate change, deforestation and other shifts affecting the planet's well-being.

Ms. Norwood, a physicist, was the person primarily responsible for designing and championing the scanner that made the program possible. NASA has called her "the mother of Landsat." At the dawn of the era of space exploration in the 1950s and '60s, she was working at Hughes Aircraft Company developing instruments. One of a small group of women in a male-dominated industry, she stood out more for her acumen. "She said, 'I was kind of known as the person who could solve impossible problems,'" Naomi Norwood told NASA for a video on its website. "So people would bring things to her, even pieces of other projects." [...]

Over the next 50 years, new Landsat satellites replaced earlier ones. Ms. Norwood oversaw the development of Landsat 2, 3, 4 and 5. Currently, Landsat 8 and 9 are orbiting the earth, and NASA plans to launch Landsat 10 in 2030. Each generation satellite has added more imaging capabilities, but always based on Ms. Norwood's original concept. The Landsat program has mapped changes in the planet brought on by climate change and by human actions. They include the near disappearance of the Aral Sea between Kazakhstan and Uzbekistan, the shrinking of the Great Salt Lake in Utah, the evolving shape of the Mississippi Delta, and the deforestation and increasing agricultural use of land in Turkey and Brazil.

An anonymous reader quotes a report from the New York Times: Mark Zuckerberg, Meta's chief executive, has declared that 2023 will be the "year of efficiency" at his company. So far, efficiency has translated into mass layoffs. He has conducted two rounds of cuts over the past six months, with two more to come; these will eliminate more than 21,000 people. Mr. Zuckerberg is also closing 5,000 open positions, which amounts to 30 percent of his company's work force. At the same time, some of Meta's top executives have moved away and are managing large parts of the Silicon Valley company from their new homes in places like London and Tel Aviv. The layoffs and absentee leadership, along with concerns that Mr. Zuckerberg is making a bad bet on the future, have devastated employee morale at Meta, according to nine current and former employees, as well as messages reviewed by The New York Times.

Employees at Meta, which not long ago was one of the most desirable workplaces in Silicon Valley, face an increasingly precarious future. The company's stock price has dropped 43 percent from its peak 19 months ago. More layoffs, Mr. Zuckerberg has said on his Facebook page, are coming this month. Some of those cuts could be in engineering groups, which would have been unthinkable before the trouble started last year, two employees said. "So many of the employees feel like they're in limbo right now," said Erin Sumner, a global director of human resources at DeleteMe, who was laid off from Facebook in November. "They're saying it's 'Hunger Games' meets 'Lord of the Flies,' where everyone is trying to prove their worth to management."

Meta, which owns Facebook, Instagram and WhatsApp, is not the only big tech company that has hit the brakes on spending. Amazon, Microsoft, Google, Salesforce and others have laid off thousands of workers in recent months, shed office space, dropped perks and pulled back from experimental initiatives. But Meta appears to face the most challenges. Last year, the company reported consecutive quarters of declining revenue -- a first since it became a public company in 2012.

The European Space Agency's Juice probe has blasted off on a landmark mission to Jupiter's moons, rising on a plume of white from its launchpad in Kourou, French Guiana, on the north-eastern shoulder of South America. From a report: The mission, which was delayed for 24 hours after lightning threatened to strike on Thursday, intends to uncover the secrets of Jupiter's Great Red Spot, its enormous polar auroras, and how its mighty magnetic field shapes conditions on the gas giant's nearby moons. It is the moons themselves that are the main attraction. Despite the frigid conditions that prevail, nearly half a billion miles from the sun, Juice will visit three of Jupiter's moons -- Europa, Callisto and Ganymede -- which harbour deep liquid water oceans beneath their icy surfaces.

The discovery of sub-surface saltwater oceans on Jupiter's moons has pushed them high up the list of solar system venues to explore for signs of life and habitability. If hydrothermal vents -- found on ocean floors all over Earth -- exist on the Jovian moons, they may provide enough warmth for life to thrive in the darkness. "I'm so thrilled to see Juice finally on its way," said Prof Andrew Coates, from the UCL Mullard Space Science Laboratory, who helped build two instruments on Juice called Pep and Janus. "This is an excellent mission to look at habitability of Jupiter's moons."

Millennials are the largest untapped market that video game companies should be focusing on, per a new study from Fandom, which finds that the generation spends more time gaming than both Gen Z and teens. Variety reports: According to fan-community platform and entertainment company Fandom's annual Inside Gaming report, which was released Thursday, "despite teens and Gen Z spending more time gaming than they did last year, older generations of players are spending more hours per week gaming." Compiled based on proprietary user data from Fandom.com and a global study that examines how gamer motivations and behaviors vary by generation, the report found that 52% of Millennials surveyed rank playing video games as their top interest and 40% of Fandom's Millennial audience spends over 22 hours per week gaming, compared to only 29% of tweens.

Additionally, Fandom's report found that "influence to purchase brands that have investments in the gaming space gets stronger with age," as Fandom's millennial users are at least 24% more likely to be "heavily influenced" to buy games compared to the average Fandom user. But that doesn't mean studios and developers should start sleeping on the younger generations: While 45% of gamers overall are spending more time gaming than they did a year ago, and Millennials are the demo playing the most of anyone, the biggest growth in overall time spent gaming vs. last year was seen among tweens and teens, up 63% and 48%, respectively.

A NASA probe sent to observe Jupiter's swarm of asteroids recently caught the first glimpse of its rocky targets, capturing deep-space images of four of the mysterious Trojans. Gizmodo reports: The Lucy spacecraft used its highest resolution imager, L'LORRI (Lucy LOng Range Reconnaissance Imager), to photograph four Trojan asteroids during a two-day period from March 25 to 27, NASA announced on Thursday. The first asteroids to be seen by Lucy are: Eurybates, Polymele, Leucus, and Orus. Those four are part of two large groups of rocky bodies that lead and follow Jupiter as it orbits the Sun. Lucy is still a long way from reaching its asteroid targets, which are currently about 330 million miles (530 million kilometers) away from the probe. That's more than three times the average distance between Earth and the Sun, according to NASA.

The initial set of images are the first in a series of observations to measure how the Trojan asteroids reflect light when seen from a higher angle than ground-based observations, according to NASA. The images will then help NASA decide on exposure times to use for Lucy's close-up observations of the asteroids.

The 2019 release of the first image of a black hole was hailed as a significant scientific achievement. But truth be told, it was a bit blurry -- or, as one astrophysicist involved in the effort called it, a "fuzzy orange donut." Scientists on Thursday unveiled a new and improved image of this black hole -- a behemoth at the center of a nearby galaxy -- mining the same data used for the earlier one but improving its resolution by employing image reconstruction algorithms to fill in gaps in the original telescope observations. From a report: Hard to observe by their very nature, black holes are celestial entities exerting gravitational pull so strong no matter or light can escape. The ring of light -- that is, the material being sucked into the voracious object -- seen in the new image is about half the width of how it looked in the previous picture. There is also a larger "brightness depression" at the center - basically the donut hole - caused by light and other matter disappearing into the black hole.

The image remains somewhat blurry due to the limitations of the data underpinning it -- not quite ready for a Hollywood sci-fi blockbuster, but an advance from the 2019 version. This supermassive black hole resides in a galaxy called Messier 87, or M87, about 54 million light-years from Earth. A light year is the distance light travels in a year, 5.9 trillion miles (9.5 trillion km). This galaxy, with a mass 6.5 billion times that of our sun, is larger and more luminous than our Milky Way. Further reading: The Black Hole Image Data Was Spread Across 5 Petabytes Stored On About Half a Ton of Hard Drives (2019).

A historic mission to Jupiter is about to blast off. The European Space Agency's spacecraft nicknamed Juice -- for Jupiter Icy Moons Explorer -- is set to begin an eight-year journey toward the planet and three of its largest moons. From a report: Juice is scheduled to launch Friday morning Eastern Time from a spaceport in Kourou, French Guiana, after an earlier attempt was scrubbed because of lightning risk. Once it arrives at Jupiter, Juice will study some of the moons in great detail, mapping their icy surfaces and searching for subsurface oceans that could harbor life.

While the spacecraft can't detect life, the mission should help confirm whether the moons -- Europa, Callisto and Ganymede -- have the conditions necessary to sustain life. The trio, along with the volcanically active moon Io, were discovered by Galileo more than four centuries ago and are among the nearly 100 moons orbiting Jupiter, according to the National Aeronautics and Space Administration. About half an hour after its launch, which will be livestreamed Friday, Juice will separate from its rocket and make contact with mission controllers on Earth. The solar-powered spacecraft will then deploy solar wings that measure roughly 900 square-feet and expand into a cross-like configuration on both sides of the craft. In the following 17 days, Juice is expected to deploy its antennas and instrument-containing booms and begin its cosmic sojourn, which people can follow on the agency's website.

The journey will be a roundabout one. Juice will complete flybys of Earth, the moon, and Venus over the next six years to adjust its trajectory and gain enough speed to get to Jupiter. Jupiter is, on average, about 444 million miles from Earth, yet Juice will travel nearly 4 billion miles before getting there, according to Mr. Sarri. It will also have to withstand temperatures from close to 500 degrees Fahrenheit around Venus to nearly minus 400 degrees Fahrenheit at Jupiter. If all goes well, Juice is scheduled to arrive at Jupiter by July 2031. Once there, the craft will complete flybys of the three moons before entering Ganymede's orbit to collect further data, which are sent back to Earth using an 8-foot antenna.

Researchers have discovered that in the exotic conditions of the early universe, waves of gravity may have shaken space-time so hard that they spontaneously created radiation. Universe Today reports: a team of researchers have discovered that an exotic form of parametric resonance may have even occurred in the extremely early universe. Perhaps the most dramatic event to occur in the entire history of the universe was inflation. This is a hypothetical event that took place when our universe was less than a second old. During inflation our cosmos swelled to dramatic proportions, becoming many orders of magnitude larger than it was before. The end of inflation was a very messy business, as gravitational waves sloshed back and forth throughout the cosmos.

Normally gravitational waves are exceedingly weak. We have to build detectors that are capable of measuring distances less than the width of an atomic nucleus to find gravitational waves passing through the Earth. But researchers have pointed out that in the extremely early universe these gravitational waves may have become very strong. And they may have even created standing wave patterns where the gravitational waves weren't traveling but the waves stood still, almost frozen in place throughout the cosmos. Since gravitational waves are literally waves of gravity, the places where the waves are the strongest represent an exceptional amount of gravitational energy.

The researchers found that this could have major consequences for the electromagnetic field existing in the early universe at that time. The regions of intense gravity may have excited the electromagnetic field enough to release some of its energy in the form of radiation, creating light. This result gives rise to an entirely new phenomenon: the production of light from gravity alone. There's no situation in the present-day universe that could allow this process to happen, but the researchers have shown that the early universe was a far stranger place than we could possibly imagine.

An anonymous reader quotes a report from The Guardian: Red sand shifts under the boots of the crew members. In the distance, it appears that a rocky mountain range is rising out of the Martian horizon. A thin layer of red dust coats the solar panels and equipment necessary for the year-long mission. This landscape isn't actually 145m miles away. We are in a corner of the Nasa Johnson Space Center in Houston, in a large white warehouse right next to the disc golf course and on the tram route for tourists and school groups. But starting this June, four volunteer test subjects will spend a year locked inside, pretending to live on Mars. Nasa researchers say they're doing everything they can to make it as realistic as possible so they can learn the impact that a year in isolation with limited resources has on human health. "As we move from low Earth orbit, from moon to Mars, we're going to have a lot more resource restrictions than we have on the International Space Station and we're going to be a lot further from Earth or any help from Earth," said Dr Grace Douglas, the principal investigator for the Crew Health Performance Exploration Analog, or Chapea for short.

The four crew members will live in a small housing unit that was constructed using a huge 3D printer to simulate how Nasa may create structures on the Martian surface with Martian soil. They'll conduct experiments, grow food and exercise -- and be tested regularly so scientists can learn what a year on Mars could do to the body and mind. "This is really an extreme circumstance," said Dr Suzanne Bell, who leads the Behavioral Health and Performance Laboratory at the Nasa Johnson Space Center. "You're asking for individuals to live and work together for over a one-year period. Not only will they have to get along well, but they'll also have to perform well together."

Watching four people spend a year in a 3D-printed box is Nasa's next small step toward landing humans on the surface of Mars. Nasa says it hopes to send humans to the red planet as early as the 2030s. The first mission could be a nine-month trip one-way, and could leave the astronauts on the surface for two and a half years before starting the long trip back home. Preparations for that trek are already well under way with the agency's Artemis program. Artemis is sending astronauts back to the Moon for the first time since 1972, including the first person of color and woman to walk on another celestial body. As part of the Artemis missions, Nasa is also launching Gateway, a space station that will orbit the Moon and serve as a pit stop for Mars-bound missions. Getting to the Moon means getting to Mars, and getting to Mars means testing the physical and behavioral health of a crew in isolation. That's where Chapea comes in.

According to the BBC, the Atacama Cosmology Telescope (ACT) in Chile has traced the distribution of dark matter "on a quarter of the sky and across almost 14 billion years of time." From the report: In the image [here], the colored areas are the portions of the sky studied by the telescope. Orange regions show where there is more mass, or matter, along the line of sight; purple where there is less. Typical features are hundreds of millions of light-years across. The grey/white areas show where contaminating light from dust in our Milky Way galaxy has obscured a deeper view. The distribution of matter agrees very well with scientific predictions.

ACT observations indicate that the "lumpiness" of the Universe and the rate at which it has been expanding after 14 billion years of evolution are just what you'd expect from the standard model of cosmology, which has Einstein's theory of gravity (general relativity) at its foundation. Recent measurements that used an alternative background light, one emitted from stars in galaxies rather than the CMB, had suggested the Universe lacked sufficient lumpiness.

Another tension concerns the rate at which the Universe is expanding - a number called the Hubble constant. When [the European Space Agency's Planck observatory] looked at temperature fluctuations across the CMB, it determined the rate to be about 67 kilometres per second per megaparsec (A megaparsec is 3.26 million light-years). Or put another way - the expansion increases by 67km per second for every 3.26 million light-years we look further out into space. A tension arises because measurements of the expansion in the nearby Universe, made using the recession from us of variable stars, clocks in at about 73km/s per megaparsec. It's a difference that can't easily be explained. ACT, employing its lensing technique to nail down the expansion rate, outputs a number similar to Planck's. "It's very close - about 68km/s per megaparsec," said Dr Mathew Madhavacheril from the the University of Pennsylvania. ACT team-member Prof Blake Sherwin from Cambridge University, UK, added: "We and Planck and several other probes are coming in on the lower side. Obviously, you could have a scenario where both the measurements are right and there's some new physics that explains the discrepancy. But we're using independent techniques, and I think we're now starting to close the loophole where we could all be riding this new physics and one of the measurements has to be wrong."

Papers describing the new results have been submitted to The Astrophysical Journal and posted on the ACT website.

A filmmaker walks us through the reasons behind the 'dark cinematography' that's causing so many complaints. From a report: Take, for instance, Wes Craven's 1996 horror classic Scream -- a film often remarked on for just how lit everything in it is at all times. An early scene depicts protagonist Sidney Prescott embracing her boyfriend Billy Loomis in the wake of a terrifying home invasion and her near-death at the hands of a masked killer. After Sidney throws her arms around Billy, Craven cuts to a tight close-up on Billy's face, which is illuminated by a harsh, ominous, icy-cool light that telegraphs his sinister intentions. But where is that light coming from? The bedroom they're in has no lamps switched on. Could it be the moon? Hard to justify, as the only windows in the space are behind Billy, and the light we're staring at is so much brighter and closer than the moon could ever be. So what on Earth is that light?

The answer is, simply enough, nothing. Craven often didn't feel any real need to rationalize why a bright light would suddenly appear one second before disappearing again in the following shot. It's a purely stylistic choice, employed for that one moment to cast doubt on Billy's trustworthiness in the audience's mind. Itâ(TM)s an extremely stagey choice that fits neatly within the larger series' heightened, melodramatic style. Scream wouldn't really be Scream without it. The hyper-lit style was a staple of cinematography in American films during the '90s, and like all trends, it eventually fell out of fashion -- in this case, a few years after Scream hit theaters. The 2000s saw filmmakers embracing more directional, shadowy lighting styles, evoking a grittier, more "grounded" aesthetic while retaining a sense of classic Hollywood polish. The 2010s featured another huge shift in style, this time toward hyper-naturalism. Even broad, big-budget blockbusters like Harry Potter and the Deathly Hallows -- Part 1 embraced a look torn straight from indie cinema. Not only are the lights in that film always motivated, they're realistic. Where earlier films might have used the presence of the moon or a table lamp to justify much brighter lighting, movies like Deathly Hallows, Interstellar, and Dawn of the Planet of the Apes let the light of a lamp simply look like a lamp.

When Dr. Makenzie Lystrup was sworn in as the new director of NASA's Goddard Space Flight Center last week, she didn't take her oath of office on the Bible or the U.S. Constitution, but rather on a tome revered by space enthusiasts everywhere: Carl Sagan's Pale Blue Dot. From a report: The book, published in 1994, is named after an iconic image of Earth, snapped by the Voyager I probe, that depicts the planet as a small speck smothered by the emptiness of space. That photo inspired astronomer Carl Sagan to write: "Look again at that dot. That's here. That's home. That's us." For many, the book serves as a reminder of humanity's place in the universe and the need to preserve our home planet, which makes it similar to holy scripture for a newly appointed NASA director. On Thursday, when Lystrup chose to place her left hand on a copy of Sagan's book while being sworn in by NASA Administrator Bill Nelson, a photographer captured the moment, and NASA Goddard's social media shared the image. The constitution does not require that government officials be sworn in using a particular text, just that they "shall be bound by Oath or Affirmation, to support this Constitution." Most U.S. politicians and officials end up using the Bible.

An anonymous reader shares a report:Weather apps are not all the same. There are tens of thousands of them, from the simply designed Apple Weather to the expensive, complex, data-rich Windy.App. But all of these forecasts are working off of similar data, which are pulled from places such as the National Oceanic and Atmospheric Administration (NOAA) and the European Centre for Medium-Range Weather Forecasts. Traditional meteorologists interpret these models based on their training as well as their gut instinct and past regional weather patterns, and different weather apps and services tend to use their own secret sauce of algorithms to divine their predictions. On an average day, you're probably going to see a similar forecast from app to app and on television. But when it comes to how people feel about weather apps, these edge cases -- which usually take place during severe weather events -- are what stick in a person's mind. "Eighty percent of the year, a weather app is going to work fine," Matt Lanza, a forecaster who runs Houston's Space City Weather, told me. "But it's that 20 percent where people get burned that's a problem."

No people on the planet have a more tortured and conflicted relationship with weather apps than those who interpret forecasting models for a living. "My wife is married to a meteorologist, and she will straight up question me if her favorite weather app says something different than my forecast," Lanza told me. "That's how ingrained these services have become in most peoples' lives." The basic issue with weather apps, he argues, is that many of them remove a crucial component of a good, reliable forecast: a human interpreter who can relay caveats about models or offer a range of outcomes instead of a definitive forecast. [...] What people seem to be looking for in a weather app is something they can justify blindly trusting and letting into their lives -- after all, it's often the first thing you check when you roll over in bed in the morning. According to the 56,400 ratings of Carrot in Apple's App Store, its die-hard fans find the app entertaining and even endearing. "Love my psychotic, yet surprisingly accurate weather app," one five-star review reads. Although many people need reliable forecasting, true loyalty comes from a weather app that makes people feel good when they open it.

schwit1 shares a report from Inverse: On March 23, sky observers marveled at a gorgeous display of northern and southern lights. It was a reminder that when our Sun gets active, it can spark a phenomenon called "space weather." Aurorae are among the most benign effects of this phenomenon. At the other end of the space weather spectrum are solar storms that can knock out satellites. The folks at Starlink found that out the hard way in February 2022. On January 29 that year, the Sun belched out a class M 1.1 flare and related coronal mass ejection. Material from the Sun traveled out on the solar wind and arrived at Earth a few days later. On February 3, Starlink launched a group of 49 satellites to an altitude only 130 miles above Earth's surface. They didn't last long, and now solar physicists know why.

A group of researchers from NASA Goddard Space Flight Center and the Catholic University of America took a closer look at the specifics of that storm. Their analysis identified a mass of plasma that impacted our planet's magnetosphere. The actual event was a halo coronal mass ejection from an active region in the northeast quadrant of the Sun. The material traveled out at around 690 kilometers per second as a shock-driving magnetic cloud. Think of it as a long ropy mass of material writhing its way through space. As it traveled, it expanded and at solar-facing satellites -- including STEREO-A, which took a direct hit from it -- made observations. Eventually, the cloud smacked into Earth's magnetosphere creating a geomagnetic storm.

The atmosphere thickened enough that it affected the newly launched Starlink stations. They started to experience atmospheric drag, which caused them to deorbit and burn up on the way down. It was an expensive lesson in space weather and provided people on Earth with a great view of what happens when satellites fall back to Earth. It was also that could have been avoided if they'd delayed their launch to account for the ongoing threat.