Science and Technology

General Motors said on Tuesday that its profit in the final three months of 2023 was depressed by losses stemming from unsold electric vehicles and the cost of a 40-day strike at some of its U.S. plants.The automaker, which has been banking on a rapid rise in sales of battery-powered models, earned $2.1 billion in the fourth quarter, it said, up from $2.0 billion a year earlier. G.M.’s revenue jumped about 10 percent, to $171.8 billion.“The pace of E.V. growth has slowed, which has created some uncertainty,” the company’s chief financial officer, Paul Jacobson, said in a conference call.G.M. took…

Ring, a home security camera company owned by Amazon, said that it would stop letting police departments request users’ footage in its app amid longstanding concerns from privacy advocates about the company’s relationship with law enforcement.Eric Kuhn, the general manager of subscriptions and software for the Ring app Neighbors, announced on Wednesday that the company was shutting down a feature that allowed the police to request and receive videos from users of the app, a social platform similar to Nextdoor and Citizen where people can share alerts about crime near their home.Mr. Kuhn did not say why Ring was eliminating…

The genetic testing company 23andMe is being accused in a class-action lawsuit of failing to protect the privacy of customers whose personal information was exposed last year in a data breach that affected nearly seven million profiles.The lawsuit, which was filed on Friday in federal court in San Francisco, also accused the company of failing to notify customers with Chinese and Ashkenazi Jewish heritage that they appeared to have been specifically targeted, or that their personal genetic information had been compiled into “specially curated lists” that were shared and sold on the dark web.The suit was filed after 23andMe submitted…

For decades, the Copyright Office has been a small and sleepy office within the Library of Congress. Each year, the agency’s 450 employees register roughly half a million copyrights, the ownership rights for creative works, based on a two-centuries-old law.In recent months, however, the office has suddenly found itself in the spotlight. Lobbyists for Microsoft, Google, and the music and news industries have asked to meet with Shira Perlmutter, the register of copyrights, and her staff. Thousands of artists, musicians and tech executives have written to the agency, and hundreds have asked to speak at listening sessions hosted by the…

For four years, the computer scientist Trieu Trinh has been consumed with something of a meta-math problem: how to build an A.I. model that solves geometry problems from the International Mathematical Olympiad, the annual competition for the world’s most mathematically attuned high-school students.Last week Dr. Trinh successfully defended his doctoral dissertation on this topic at New York University; this week, he described the result of his labors in the journal Nature. Named AlphaGeometry, the system solves Olympiad geometry problems at nearly the level of a human gold medalist.While developing the project, Dr. Trinh pitched it to two research scientists at…

When Augustin Lignier, a professional photographer in Paris, was in graduate school, he began to ponder the point of picture-taking in the modern world: Why did so many of us feel compelled to photograph our lives and share those images online?It was not a novel question, but it led Mr. Lignier to a surprising place, and before long he found himself building what was, in essence, a photo booth for rats.He took inspiration from B.F. Skinner, the famous behaviorist who had devised a test chamber to study learning in rats. The Skinner box, as it became known, dispensed food pellets…