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Walmart is taking a lesson from the humble honeybee in its quest to make its deliveries as fast as possible. From a report: The retail giant already boasts a formidable store count of 4,700 locations across the US, which puts it within a short drive of more than 90% of households. But in order to grow its reach without necessarily having to build new supercenters, Walmart says it has been using a relatively new hexagonal map segmentation -- a change from the conventional ZIP code or radius-based strategies that are commonly used in determining delivery areas. Walmart says the strategy allows it to better understand where customers are and which stores have what they want. As bees have long known, hexagons can be an excellent shape for making the most of a given space, and Walmart says the more precise maps allow it to reach an additional 12 million US households with same-day delivery. "This is helping us to adapt how we service our customers, by allowing us to go from a fixed-mile radius into a much more dynamic catchment area that caters to the needs of the customers that a particular store will serve," Walmart global tech senior director of engineering Parthibban Raja told Fast Company in December, following a pilot of the concept. Walmart says its platform uses a combination of its own data and open-source software to create new delivery zones.

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An anonymous reader shares a report: Kevin Systrom, the co-founder of Instagram, testified on Tuesday in a landmark federal antitrust trial that he left Meta in 2018 because his company was denied resources. The government has argued that Meta purchased Instagram in 2012 as part of a "buy-or-bury strategy" to illegally cement its social media monopoly by killing off its rivals. Last week, current and former Meta executives testified that the social media giant, formerly known as Facebook, used its deep pockets to invest in Instagram after its purchase. In testimony at the U.S. District Court of the District of Columbia, Mr. Systrom painted a different picture, saying he left Meta because Mark Zuckerberg, the chief executive, wasn't investing enough. At that time, Instagram had grown to 1 billion users, about 40 percent of Facebook's size, yet the photo-sharing app had only 1,000 employees compared to 35,000 employees at Facebook, he said. "We were by far the fastest growing team. We produced the most revenue and relative to what we should have been at the time, I felt like we should have been much larger," said Mr. Systrom, who is expected to testify for six hours. Mr. Systrom said he found the decisions baffling. When asked by an F.T.C. lawyer why Mr. Zuckerberg might have decided to give Instagram fewer resources, Mr. Systrom said it was a consistent pattern during his tenure at Meta. "Mark was not investing in Instagram because he believed we were a threat to their growth," he said, referring to Mr. Zuckerberg's prioritization of Facebook.

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Offices nationwide are ditching harsh fluorescent lighting in favor of advanced systems designed to improve cognitive function and entice remote workers back to physical workplaces. Companies are investing in circadian-tuned lighting that adjusts intensity and color temperature throughout the day to mimic natural light patterns, syncing with employees' biological rhythms, according to WSJ. The technology arsenal includes faux skylights displaying virtual suns and moons, AI-controlled self-tinting windows, and customizable lighting zones that can be adjusted via remote control. Research suggests these innovations may improve brain function during tasks requiring sustained attention. "We've known for a long time that natural light is better and makes people feel better," says Peter Cappelli, professor at Wharton School. The innovations stem from discoveries in the early 2000s of photosensitive retinal cells that affect biology independent of vision. Industry specialists report a "huge uptick in requests," though implementation adds 20-30% to project costs, potentially slowing mainstream adoption.

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An anonymous reader shares a report: Canada has seen a boom in political books created with generative artificial intelligence, adding to concerns about how new technologies are affecting the information voters receive during the election campaign. Prime Minister Mark Carney was the subject of at least 16 books published in March and listed on Amazon.com, according to a review of the site on April 16. Five of those were published on a single day. In total, some 30 titles were published about Carney this year and made available on Amazon -- but most were taken down from the site after inquiries from Bloomberg News. One author, James A. Powell, put his name to at least three books about the former central banker, who's now leading the Liberal Party and is narrowly favored to win the election. Among the titles that Amazon removed: "Carney's Code: Climate Capitalism, Digital Currencies, and the Technocratic Takeover of the Global Economy -- Inside Mark Carney's Blueprint for the Post-Democratic World."

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An anonymous reader shares a report: In a shocking development, Google won't roll out a new standalone prompt for third-party cookies in Chrome. It's a move that amounts to a U-turn on the Chrome team's earlier updated approach to deprecating third-party cookies, announced in July last year, with the latest development bound to cause ructions across the ad tech ecosystem. "We've made the decision to maintain our current approach to offering users third-party cookie choice in Chrome, and will not be rolling out a new standalone prompt for third-party cookies," wrote Anthony Chavez, vp Privacy Sandbox at Google, in a blog post published earlier today (April 22). "Users can continue to choose the best option for themselves in Chrome's Privacy and Security Settings." However, it's not the end of Privacy Sandbox, according to Google, as certain initiatives incubated within the project are set to continue, such as its IP Protection for Chrome Incognito users, which will be rolled out in Q3.

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Abstract of a paper on National Bureau of Economic Research: We estimate the effect of social media deactivation on users' emotional state in two large randomized experiments before the 2020 U.S. election. People who deactivated Facebook for the six weeks before the election reported a 0.060 standard deviation improvement in an index of happiness, depression, and anxiety, relative to controls who deactivated for just the first of those six weeks. People who deactivated Instagram for those six weeks reported a 0.041 standard deviation improvement relative to controls. Exploratory analysis suggests the Facebook effect is driven by people over 35, while the Instagram effect is driven by women under 25.

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Apple has quietly removed the "available now" designation from its Apple Intelligence marketing page following a National Advertising Division review. The change came after the NAD recommended Apple "discontinue or modify" the claim, which "reasonably conveyed the message" that all promoted AI features were immediately available with iPhone 16 devices. The NAD, part of the Better Business Bureau, determined Apple's footnote explaining feature availability was "neither sufficiently clear and conspicuous nor close to the triggering claims." Further reading: Apple Delays 'More Personalized Siri' Apple Intelligence Features; 'Something Is Rotten in the State of Cupertino'; Apple Shakes Up AI Executive Ranks in Bid to Turn Around Siri.

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Films made with the help of AI will be able to win top awards at the Oscars, according to its organisers. From a report: The Academy of Motion Picture Arts and Sciences issued new rules on Monday which said the use of AI and other digital tools would "neither help nor harm the chances of achieving a nomination." [...] The Academy said it would still consider human involvement when selecting its winners. The Academy said its new language around eligibility for films made using generative AI tools was recommended by its Science and Technology Council. Under further rule changes announced on Monday, Academy members must now watch all nominated films in each category in order to be able to take part in the final round of voting, which decides upon winners.

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US scientists are fleeing abroad in record numbers as the Trump administration slashes research funding, according to exclusive data analysis by Nature. Applications from American researchers for international positions surged 32% between January and March 2025 compared to the same period last year, while US-based users browsing overseas jobs jumped 35%. The exodus accelerated in March as the administration intensified science cuts, with job views spiking 68% year-over-year. Applications to Canadian institutions increased 41%, while interest from Canadians in US positions plummeted 13%. Recent months have seen more than 200 federal HIV/AIDS research grants abruptly terminated, cuts to NIH COVID-19 funding revealed, and a $400 million reduction in research grants at Columbia University. "To see this big drop in views and applications to the US -- and the similar rise in those looking to leave -- is unprecedented," said James Richards, who leads Global Talent Solutions at Springer Nature. European institutions are capitalizing on the talent migration. Aix-Marseille University launched its "Safe Place for Science" initiative with $17.2 million to sponsor researchers, while Germany's Max Planck Society created a Transatlantic Program offering positions to scientists "no longer able to work in the United States." The trend extends beyond Europe, with US-based views of Chinese science positions increasing 30% in the first quarter of 2025.

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Google pays Samsung an "enormous sum of money" every month to preinstall Google generative AI app, Gemini, on its phones and devices, according to court testimony, even though the company's practice of paying for installations has twice been found to violate the law. From a report: The company began paying Samsung for Gemini in January, according to Peter Fitzgerald, Google's vice president of platforms and device partnerships, who testified Monday in Washington federal court as part of the Justice Department's antitrust case. The contract, set to run at least two years, provides fixed monthly payments for each device that preinstalls Gemini and pays Samsung a percentage of the revenue Google earns from advertisements within the app, Fitzgerald told Judge Amit Mehta, who is overseeing the case.

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Logitech has quietly increased prices on several flagship products by as much as 25%, according to findings (video) by YouTuber Cameron Dougherty. The MX Master 3S mouse now costs $120, up 20% from its previous $100 price point, while the MX Keys S keyboard has jumped 18% to $130. The K400 Plus Wireless Touch keyboard saw the most dramatic percentage increase, rising from $28 to $35. These price adjustments, implemented without formal announcement, come amid ongoing tariff pressures from the Trump administration affecting PC hardware manufacturers. Chinese electronics maker Anker also recently implemented similar increases, suggesting a broader industry trend.

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Google has argued in court that the U.S. Department of Justice's proposal to break up its Chrome and Android businesses would weaken national security and harm the country's position in the global AI race, particularly against China. CNBC reports: The remedies trial in Washington, D.C., follows a judge's ruling in August that Google has held a monopoly in its core market of internet search, the most-significant antitrust ruling in the tech industry since the case against Microsoft more than 20 years ago. The Justice Department has called for Google to divest its Chrome browser unit and open its search data to rivals. Google said in a blog post on Monday that such a move is not in the best interest of the country as the global battle for supremacy in artificial intelligence rapidly intensifies. In the first paragraph of the post, Google named China's DeepSeek as an emerging AI competitor. The DOJ's proposal would "hamstring how we develop AI, and have a government-appointed committee regulate the design and development of our products," Lee-Anne Mulholland, Google's vice president of regulatory affairs, wrote in the post. "That would hold back American innovation at a critical juncture. We're in a fiercely competitive global race with China for the next generation of technology leadership, and Google is at the forefront of American companies making scientific and technological breakthroughs."

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NASA's oldest active astronaut, Don Pettit, celebrated his 70th birthday by returning to Earth after a seven-month mission aboard the ISS. The Guardian reports: A Soyuz capsule carrying the American and two Russian cosmonauts landed in Kazakhstan on Sunday, Pettit's birthday. "Today at 0420 Moscow time (0120 GMT), the Soyuz MS-26 landing craft with Alexei Ovchinin, Ivan Vagner and Donald (Don) Pettit aboard landed near the Kazakh town of Zhezkazgan," Russia's space agency Roscosmos said. Spending 220 days in space, Pettit, Ovchinin and Vagner orbited the Earth 3,520 times and completed a journey of 93.3m miles over the course of their mission. It was the fourth spaceflight for Pettit, who has logged more than 18 months in orbit during his 29-year career. Nasa said in a statement that Pettit was "doing well and in the range of what is expected for him following return to Earth." A recording of the touchdown can be viewed here. Earlier this year, Pettit managed to take one of the best photos ever captured from space. "When I first saw it, I was dazzled by its beauty," wrote Ars Technica's Eric Berger. "But when I looked further into the image, there were just so many amazing details to be found." "In this image, one can see the core of the Milky Way galaxy, zodiacal light (sunlight diffused by interplanetary dust), streaks of SpaceX Starlink satellites, individual stars, an edge-on view of the atmosphere that appears in burnt umber due to hydroxide emissions, a near-sunrise just over the horizon, and nighttime cities appearing as streaks."

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An anonymous reader quotes a report from MIT Technology Review: Arete Glacier Initiative has raised $5 million to improve forecasts of sea-level rise and explore the possibility of refreezing glaciers in place. Off one atoll, just south of the Maldives' capital, Male, researchers are testing one way to capture sand in strategic locations -- to grow islands, rebuild beaches, and protect coastal communities from sea-level rise. Swim 10 minutes out into the En'boodhoofinolhu Lagoon and you'll find the Ramp Ring, an unusual structure made up of six tough-skinned geotextile bladders. These submerged bags, part of a recent effort called the Growing Islands project, form a pair of parentheses separated by 90meters (around 300 feet). The bags, each about two meters tall, were deployed in December 2024, and by February, underwater images showed that sand had climbed about a meter and a half up the surface of each one, demonstrating how passive structures can quickly replenish beaches and, in time, build a solid foundation for new land. "There's just a ton of sand in there. It's really looking good," says Skylar Tibbits, an architect and founder of the MIT Self-Assembly Lab, which is developing the project in partnership with the Male-based climate tech company Invena. The Self-Assembly Lab designs material technologies that can be programmed to transform or "self-assemble" in the air or underwater, exploiting natural forces like gravity, wind, waves, and sunlight. Its creations include sheets of wood fiber that form into three-dimensional structures when splashed with water, which the researchers hope could be used for tool-free flat-pack furniture.Growing Islands is their largest-scale undertaking yet. Since 2017, the project has deployed 10 experiments in the Maldives, testing different materials, locations, and strategies, including inflatable structures and mesh nets. The Ramp Ring is many times larger than previous deployments and aims to overcome their biggest limitation. In the Maldives, the direction of the currents changes with the seasons. Past experiments have been able to capture only one seasonal flow, meaning they lie dormant for months of the year. By contrast, the Ramp Ring is "omnidirectional," capturing sand year-round. "It's basically a big ring, a big loop, and no matter which monsoon season and which wave direction, it accumulates sand in the same area," Tibbits says. The approach points to a more sustainable way to protect the archipelago, whose growing population is supported by an economy that caters to 2 million annual tourists drawn by its white beaches and teeming coral reefs. Most of the country's 187 inhabited islands have already had some form of human intervention to reclaim land or defend against erosion, such as concrete blocks, jetties, and breakwaters.

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Researchers have uncovered a new supply chain attack called Slopsquatting, where threat actors exploit hallucinated, non-existent package names generated by AI coding tools like GPT-4 and CodeLlama. These believable yet fake packages, representing almost 20% of the samples tested, can be registered by attackers to distribute malicious code. CSO Online reports: Slopsquatting, as researchers are calling it, is a term first coined by Seth Larson, a security developer-in-residence at Python Software Foundation (PSF), for its resemblance to the typosquatting technique. Instead of relying on a user's mistake, as in typosquats, threat actors rely on an AI model's mistake. A significant number of packages, amounting to 19.7% (205,000 packages), recommended in test samples were found to be fakes. Open-source models -- like DeepSeek and WizardCoder -- hallucinated more frequently, at 21.7% on average, compared to the commercial ones (5.2%) like GPT 4. Researchers found CodeLlama ( hallucinating over a third of the outputs) to be the worst offender, and GPT-4 Turbo ( just 3.59% hallucinations) to be the best performer. These package hallucinations are particularly dangerous as they were found to be persistent, repetitive, and believable. When researchers reran 500 prompts that had previously produced hallucinated packages, 43% of hallucinations reappeared every time in 10 successive re-runs, with 58% of them appearing in more than one run. The study concluded that this persistence indicates "that the majority of hallucinations are not just random noise, but repeatable artifacts of how the models respond to certain prompts." This increases their value to attackers, it added. Additionally, these hallucinated package names were observed to be "semantically convincing." Thirty-eight percent of them had moderate string similarity to real packages, suggesting a similar naming structure. "Only 13% of hallucinations were simple off-by-one typos," Socket added. The research can found be in a paper on arXiv.org (PDF).

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Researchers at UC Berkeley claim to have induced a previously unseen color by using lasers to stimulate only the M cones in the retina, creating a visual experience beyond the natural limits of human perception. Called olo, the color is described as a highly saturated blue-green but is only visible through direct retinal manipulation. The Guardian reports: "We predicted from the beginning that it would look like an unprecedented color signal but we didn't know what the brain would do with it," said Ren Ng, an electrical engineer at the University of California, Berkeley. "It was jaw-dropping. It's incredibly saturated." The researchers shared an image of a turquoise square to give a sense of the color, which they named olo, but stressed that the hue could only be experienced through laser manipulation of the retina. "There is no way to convey that color in an article or on a monitor," said Austin Roorda, a vision scientist on the team. "The whole point is that this is not the color we see, it's just not. The color we see is a version of it, but it absolutely pales by comparison with the experience of olo." The findings have been published in the journal Science Advances.

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Longtime Slashdot reader hackingbear shares a report from Interesting Engineering: A research team at Fudan University in Shanghai, China has built the fastest semiconductor storage device ever reported, a nonvolatile flash memory dubbed "PoX" that programs a single bit in 400 picoseconds (0.0000000004 s) -- roughly 25 billion operations per second. Conventional static and dynamic RAM (SRAM, DRAM) write data in 1-10 nanoseconds but lose everything when power is cut while current flash chips typically need micro to milliseconds per write -- far too slow for modern AI accelerators that shunt terabytes of parameters in real time. The Fudan group, led by Prof. Zhou Peng at the State Key Laboratory of Integrated Chips and Systems, re-engineered flash physics by replacing silicon channels with two dimensional Dirac graphene and exploiting its ballistic charge transport. Combining ultralow energy with picosecond write speeds could eliminate separate highspeed SRAM caches and remove the longstanding memory bottleneck in AI inference and training hardware, where data shuttling, not arithmetic, now dominates power budgets. The team [which is now scaling the cell architecture and pursuing arraylevel demonstrations] did not disclose endurance figures or fabrication yield, but the graphene channel suggests compatibility with existing 2Dmaterial processes that global fabs are already exploring. The result is published in the journal Nature.

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An anonymous reader quotes a report from Popular Mechanics: American composer Alvin Lucier was well-known for his experimental works that tested the boundaries of music and art. A longtime professor at Wesleyan University (before retiring in 2011), Alvin passed away in 2021 at the age of 90. However, that wasn't the end of his lifelong musical odyssey. Earlier this month, at the Art Gallery of Western Australia, a new art installation titled Revivification used Lucier's "brain matter" -- hooked up to an electrode mesh connected to twenty large brass plates -- to create electrical signals that triggered a mallet to strike the varying plates, creating a kind of post-mortem musical piece. Conceptualized in collaboration with Lucier himself before his death, the artists solicited the help of researchers from Harvard Medical School, who grew a mini-brain from Lucier's white blood cells. The team created stem cells from these white blood cells, and due to their pluripotency, the cells developed into cerebral organoids somewhat similar to developing human brains. "At a time when generative AI is calling into question human agency, this project explores the challenges of locating creativity and artistic originality," the team behind Revivification told The Art Newspaper. "Revivification is an attempt to shine light on the sometimes dark possibilities of extending a person's presence beyond the seemed finality of death." "The central question we want people to ask is: could there be a filament of memory that persists through this biological transformation? Can Lucier's creative essence persist beyond his death?" the team said.

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OpenAI's latest reasoning models, o3 and o4-mini, hallucinate more frequently than the company's previous AI systems, according to both internal testing and third-party research. On OpenAI's PersonQA benchmark, o3 hallucinated 33% of the time -- double the rate of older models o1 (16%) and o3-mini (14.8%). The o4-mini performed even worse, hallucinating 48% of the time. Nonprofit AI lab Transluce discovered o3 fabricating processes it claimed to use, including running code on a 2021 MacBook Pro "outside of ChatGPT." Stanford adjunct professor Kian Katanforoosh noted his team found o3 frequently generates broken website links. OpenAI says in its technical report that "more research is needed" to understand why hallucinations worsen as reasoning models scale up.

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With macOS now 24 years old and Apple officially designating all Intel-based Mac minis as "vintage" or "obsolete," The Register takes a look at new internet tools that help keep vintage Macs online and surprisingly relevant: Cameron Kaiser of Floodgap Systems is a valuable ally. His retro computing interests are broad, and we've mentioned him a few times on The Register, such as his deep dive into the revolutionary Canon Cat computer, and his evaluation of RISC-V hardware performance. Back in 2020, he revived the native Classic Mac OS port of the Lynx web browser, MacLynx. Earlier this month, he came back to it and has updated it again, including adding native Mac OS dialog boxes. His account is -- as usual -- long and detailed but it's an interesting read. He also maintains some other web browsers for elderly Macs, including TenFourFox for Mac OS X 10.4 and Classilla for Mac OS 8.6 and 9.x. If you're not up to git pull commands and elderly Mac OS X build tools, then there is a fork of TenFourFox that may be worth a look, InterWebPPC. It's not current with the new batch of patches, but we can still hope for another build. In other "Classic on the internet" news, although it's not a huge amount of use on its own, there's also a newly released Classic Mac OS version of Mbed-TLS on GitHub. This ports the SSL library -- also used in the super-lightweight Dillo browser -- to the older C89/C90 standard, so that it can build in CodeWarrior and run with OpenTransport from Mac OS 9 right back to later versions of Mac OS 7. Modern macOS is UNIX certified and as such it's not all that dissimilar from other Unix-like OSes, such as Linux and the BSD family. Classic Mac OS is a profoundly different beast, which makes porting modern code to it a complex exercise -- but equally, it's a good learning exercise, and we're delighted to see 21st century programmers exploring this 1980s OS. That may be part of the motivation behind the newly announced and still incomplete SDL 2 "rough draft" that appeared a week ago. It builds on the existing SDL 1.2 port, but so far, it's less complete -- for instance, there's no sound support.

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