In a significant milestone, the Dark Energy Spectroscopic Instrument (DESI) has completed its 3D map of the Universe—the highest resolution of any such map yet achieved—on schedule and with more data than expected, the collaboration announced today. Analyses of DESI data from earlier runs have already produced exciting hints of new physics—namely that the Universe's dark energy, rather than being constant, might vary over time. The latest data must still be analyzed but could help definitively confirm or disprove those hints within the next couple of years.

"DESI's five-year survey has been spectacularly successful," DESI director Michael Levi of Berkeley Lab said. "The instrument performed better than anticipated. The results have been incredibly exciting. And the size and scope of the map and how quickly we've been able to execute is phenomenal. We're going to celebrate completion of the original survey and then get started on the work of churning through the data, because we're all curious about what new surprises are waiting for us."

As previously reported, Albert Einstein’s cosmological constant (lambda) implied the existence of a repulsive form of gravity. (For a more in-depth discussion of the history of the cosmological constant and its significance for dark energy, see our 2024 story.) Quantum physics holds that even the emptiest vacuum is teeming with energy in the form of “virtual” particles that wink in and out of existence, flying apart and coming together in an intricate quantum dance. This roiling sea of virtual particles could give rise to dark energy, giving the Universe a little extra push so that it can continue accelerating. The problem is that the quantum vacuum contains too much energy: roughly 10¹²⁰ times too much.

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The retraction came from Neurobiology of Aging, which removed a 2011 paper claiming to show that a version of a protein called amyloid-β was responsible for memory loss in Alzheimer's disease. On its own, that might not seem notable; bad papers can make it through peer review and are only caught after publication.

But this wasn't an isolated case. Over the past few years, multiple studies arguing that amyloid-β is the central driver of Alzheimer's disease have been retracted. Some scientists have even been indicted for fraud over the issue. All the while, none of the drugs targeting this protein and its pathway have had any real clinical effect.

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Ars was able to review the materials and connect with some employees to gather their thoughts. Some of the early reviews are not positive, with one employee going so far as to describe the plan as "pure f---king trash." And it's not hard to see why some people feel gun-shy or disillusioned. The company's previous stock plan, which ended up being essentially worthless, fostered a lack of trust.

However, a careful reading of the new documents, compared to the original plan, indicates that it has a more serious intent. It is set up in a similar manner to other stock option plans in the industry. If Blue Origin founder Jeff Bezos genuinely wants to course correct from Blue Origin's initial stock plan—to right the wrongs perceived by his employees—this could be a vehicle for that.

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Prediction markets have been around for decades, so this isn’t a new issue. But platforms like Kalshi and Polymarket have exploded in popularity since last year, which means the question of how to properly account for prediction market gains has shifted from a niche concern to something far more urgent for many people. While only a small sliver of the population actually uses the markets—around 3 percent, according to a recent poll—that still means millions of US residents are obligated to report their wins and losses to the Internal Revenue Service. There’s big money in play here. Kalshi, which has a predominantly American user base, saw over $12 billion in monthly trade volume this past March, according to markets tracker Defi Rate.

Kalshi declined to comment. The IRS and Polymarket did not respond to requests for comment.

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The claim by Zelenskyy has not been independently verified but was accompanied by a promotional video in which he described Ukraine’s military robots as having completed over 22,000 missions in the last three months. Ukraine’s defense ministry also recently described a threefold increase in the Ukrainian military’s uncrewed ground vehicle missions over the last five months, with more than 9,000 robotic missions conducted in March, according to Scripps News. The growing robotic ground presence represents a new trend in a war that has become synonymous with drones.

Zelenskyy’s statement may refer to an event that occurred in the Kharkiv Oblast in northeastern Ukraine last year, according to The Independent. It referenced a statement by the Ukrainian 3rd Separate Assault Brigade detailing how the unit had used flying drones and “kamikaze” ground robots to attack fortified Russian frontline positions at that time. The brigade’s statement also described Russian soldiers as surrendering to one of the unit’s robots after abandoning the battered fortifications.

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As of “late May 2026,” people who use an antenna with the affected TV models will see a reduced TV guide, according to a support page spotted by Cord Cutters News. Per the support page, “program information may not appear depending on the channel,” and “only programs from recently watched channels may be shown” for channels delivered through an antenna.

Users will also no longer see channel logos or thumbnail images in program descriptions for TV channels delivered through an antenna.

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Executives frame the new offerings as a convenience for patients, meeting people where they are and providing a service with digital equity. They also suggest their chatbots will be a safer alternative to commercial versions people are using now.

"We are at an inflection point in healthcare," Allon Bloch, CEO of clinical AI company K Health, said in a statement. "Demand is accelerating, and patients are already using AI to navigate their lives."

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The 12-inch Surface Pro tablet that originally started at $799 and the 13-inch Surface Laptop that launched at $899 now cost $1,049 and $1,149, respectively, a $250 price increase. The higher-end Surface Laptop and 13-inch Surface Pro from 2024 both started at $999 but increased to $1,199 in 2025 when their entry-level versions with 256GB of storage were discontinued; both now start at $1,499, a $300 increase.

As originally reported by Windows Central, Microsoft is blaming "recent increases in memory and component costs" for the price hikes. Supply shortages for RAM and storage chips in particular have been wreaking havoc with consumer tech all year, delaying some launches, depleting the stock of existing products, and raising prices for small and large companies alike.

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Amazon is spending an estimated $11.6 billion for Globalstar, which already partnered with Apple for satellite messaging on the iPhone. Amazon said that buying Globalstar will help it enter the Direct-to-Device (D2D) market in which satellites provide connectivity to mobile phones.

"In addition to the agreement with Globalstar, Amazon and Apple signed an agreement to provide satellite connectivity for current and future iPhone and Apple Watch features," according to Amazon, which operates the Amazon Leo satellite network formerly known as Kuiper Systems. Panos Panay, Amazon's senior VP of devices and services, said the Apple deal will make Amazon the "primary satellite service provider for iPhone and Apple Watch."

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AISI's findings show that Mythos isn't significantly different from other recent frontier models in tests of individual cybersecurity-related tasks. But Mythos could set itself apart from previous models through its ability to effectively chain these tasks into the multistep series of attacks necessary to fully infiltrate some systems.

"The Last Ones" finally falls

AISI has been putting various AI models through specially designed Capture the Flag challenges since early 2023, when GPT-3.5 Turbo struggled to complete any of the group's relatively low-level "Apprentice" tasks. Since then, the performance of subsequent models has risen steadily, to the point where Mythos Preview can complete north of 85 percent of those same Apprentice-level CTF tasks.

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Skills don't so much add new functionality as they make it easier to repeat tasks that were already possible with Gemini in Chrome. Previously, you would have to reenter the prompt each time you wanted Gemini to do something in Chrome; whether that meant typing it or copy-pasting from a saved document, you had to do it manually. Saving those favorite prompts as Skills in Chrome makes them quicker and easier to access.

The desktop version of Chrome will remember your saved Skills across devices. As long as you're logged in to your Google account, you can type forward slash ( / ) in Gemini or click the plus button to bring up your saved Skills. Simply click, and it will run in the current tab. You can also add additional tabs if it's a skill that pulls from multiple sources.

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"We believe this is the final nail in the coffin of the proton radius puzzle," Lothar Maisenbacher, of the University of California, Berkeley, who co-authored the Nature paper, told Ars.

As previously reported, most popularizations discussing the structure of the atom rely on the much-maligned Bohr model, in which electrons move around the nucleus in circular orbits. But quantum mechanics gives us a much more precise (albeit weirder) description. The electrons aren’t really orbiting the nucleus; they are technically waves that take on particle-like properties when we do an experiment to determine their position. While orbiting an atom, they exist in a superposition of states, both particle and wave, with a wave function encompassing all the probabilities of its position at once. A measurement will collapse the wave function, giving us the electron’s position. Make a series of such measurements and plot the various positions that result, and it will yield something akin to a fuzzy orbit-like pattern.

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There are tangible, objective takeaways from the nine-day mission. How did NASA's Space Launch System rocket perform? Nearly perfectly. Was the Orion spacecraft up to the job of flying to the Moon and back? Absolutely. Will engineers need to make any changes before the next Artemis mission? Yes, and that's not terribly surprising for a program that, 20 years in, has just flown a crew to space for the first time.

Ars has covered the technical lessons from Artemis II, such as hydrogen leaks on the launch pad, helium leaks in space, and a toilet that wasn't always available for No. 1.

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Back button hijacking is a way of wringing more pageviews out of visitors. It's common on sites that live and die on search traffic. You may end up on a page because it looks like something you want, but instead of letting you leave the domain, it manipulates your page history to insert something else when you click back.

The phantom page is usually a collection of additional content suggestions or a pop-up that tries to eke out a few more clicks from each visitor. Some sites get a little more creative with it, though. For example, LinkedIn has a nasty habit of sending you "back" to the social feed after you land on a link to a profile or job posting.

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IONNA was founded back in 2023 by eight OEMs: BMW, General Motors, Honda, Hyundai, Kia, Mercedes-Benz, Stellantis, and Toyota. Its plan is to deploy 30,000 high-speed chargers across the US by 2030, starting with its first locations in 2024. Currently, there are 108 IONNA locations operational with 375 NACS and 658 CCS plugs, assuming the Department of Energy's Alternative Fueling Station Locator remains a reliable resource.

Lengthy permitting delays are one of the main factors slowing the build-out of fast-charging infrastructure, and partnering with sites that already have some chargers installed will certainly help speed things up, at least a little.

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Retro Rewind: Video Store Simulator is the latest in a burgeoning field of "work simulators" that have found indie success on Steam. And while the depth of the game's overall retail simulation is pretty shallow, there is a sort of soothing, zen comfort to be found in the repetitive nostalgia of that menial workaday world of the past.

Working 9 to 5

Unlike simulations that rely heavily on menus or spreadsheets, Retro Rewind puts you in the first-person perspective of the manager of a small local VHS rental joint circa 1990. That means you have to run around doing everything from buying the tapes to laying out the furniture and decorations in the store. And while you can technically display those tapes out on any shelf you want, grouping them together by genre makes for both a better customer experience and helps to quiet those anal-retentive organizational voices in your head.

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Health officials are now warning residents and travelers about the exposure while trying to directly notify passengers who shared flights with the infected person. In an announcement on April 9, the Idaho Department of Health and Welfare (DHW) said the infected person was at the Boise airport on March 29 between 1:30 am and 7:40 am while traveling through the area.

Measles symptoms—which begin with fever, cough, runny nose, and watery, red eyes—can develop between seven and 21 days after exposure, but typically start after 11 or 12 days. That means that for anyone infected during the airport exposure, the initial generic symptoms would likely have started over the weekend. The telltale rash of measles typically doesn't appear until two to four days after those early flu-like symptoms. The rash begins on the head and moves down the body, while fever may spike to 104° F or higher. Infected people are infectious for four days before the rash appears and for four days after its onset.

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Cellular modems are something of a black box. Your phone's baseband is its own operating system running legacy C and C++ code, which makes it an increasingly appealing attack surface. The core issue is that memory management in these systems is difficult and often leads to memory-unsafe firmware code on production devices. That can allow attackers to leverage serious vulnerabilities like buffer overflows and memory leaks to compromise devices.

So that's not great—why are we still using this stuff? Part of the issue is just the inertia of embedded systems. Companies have been developing modem firmware based on 3GPP specifications for decades, so there's a lot of technical debt at this point. Modems also have to operate in real time to send and receive data effectively, and C/C++ code is fast.

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NZXT announced Flex in August 2024, saying that it would charge customers $59 to $169 a month to rent an NZXT gaming desktop (as of this writing, Flex prices are $79 to $279 per month). At the time, NZXT said that the PCs would be “new or like new.” Subscribers had the option to receive an upgraded rental PC every two years.

The program was met with criticism. Renting a PC can quickly become more costly than buying one, depending on the rental, and YouTube channel Gamers Nexus claimed in November 2024 that customers received less powerful components than expected and that NZXT advertised the rental PCs with inaccurate benchmark results. There was also concern about what NZXT did with customer data left on returned computers.

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The scams usually began with a pop-up message warning that a user's computer might have a virus. The pop-up then claimed to run a "scan" (which was always positive) of the computer and provided a toll-free number to call for more help. Those who called were connected to Tech Live Connect's Indian call center, where they were asked for remote access to their computers, diagnosed with fake problems, and charged hundreds of dollars to "fix" them. Call center workers often pretended to be Apple or Microsoft employees.

Defrauded people complained in droves.

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