Science and Technology

Tesla’s profit from sales of electric cars slumped in the last three months of last year because of price cuts intended to thwart increasingly intense competition, the company said on Wednesday as it warned of a tough year ahead.Profit in the fourth quarter nearly doubled to $7.9 billion, up from $3.7 billion a year earlier. But $5.9 billion of that profit came from a tax benefit. Without that one-time accounting effect, profit would have fallen.Tesla has slashed prices for the two cars that make up the bulk of its sales — the Model 3 sedan and the Model Y sport…

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…

An elite hacking group sponsored by Russian intelligence gained access to the emails of some of Microsoft’s senior executives beginning in late November, the company disclosed in a blog post and regulatory filing on Friday.Microsoft said it had discovered the intrusion a week ago and was still investigating. The hackers appeared to focus on combing through Microsoft’s corporate email accounts to look for information related to the hacking group, which Microsoft’s researchers called Midnight Blizzard.The hackers looked through emails from Microsoft’s senior leadership team as well as employees in cybersecurity, legal and other groups, and took some emails and attachments,…

When Apple released the Apple Watch in 2015, it was business as usual for a company whose iPhone updates had become cultural touchstones. Before the watch went on sale, Apple gave early versions of it to celebrities like Beyoncé, featured it in fashion publications like Vogue and streamed a splashy event on the internet trumpeting its features.But as Apple prepares to sell its next generation of wearable computing, the Vision Pro augmented reality device, it is marching far more quietly into the consumer marketplace.The company said in a news release this month that sales of the device would begin Friday.…

It is hard to believe that it has only been about a year since travelers started dabbling in ChatGPT-created itineraries. This year will bring even more experimentation and innovation. “A.I. is like a teenage intern,” said Chad Burt, co-owner of the travel adviser network Outside Agents, “better, smarter, faster than you, but you need to lead them.”The expanding use of A.I. could influence how we book online, what happens when flights are canceled or delayed, and even how much we pay for tickets.“In 2024, we will see a new breed of intelligent travel agents built on top of chatbots,” said…

Breana Newton, a legal coordinator in Princeton, N.J., who posts regularly about books on TikTok, was one of the people who responded to Ms. Blalock’s video. “I am going to show you bookshelf wealth,” Ms. Newton, 33, says in a video of her own. “Ready?”She then gives viewers a brief tour of her home, showing books everywhere — on shelves, in overflow piles here and there, and strewed across the bed. Absent is the sense that the rooms have been staged, or that the books were bought with the consideration of how they would look on Instagram.In an interview, Ms.…