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Alessio Figalli studies optimal transport, a field of math that ranges from the movements of clouds to the workings of chatbots.

The social media company is attracting investor interest because of Elon Musk’s close ties to President Trump and a recent jump in revenue.

The popular social media app was removed to comply with a new law that banned it in the United States. President Trump has paused enforcement of the ban.

President Trump and the network have used the phrase to suggest that his policies are the right ones and popular, though polling suggests otherwise.

In an email to employees, the company’s chief executive said the company had become bloated during its growth in recent years.

The social media site agreed to pay in the range of $10 million to settle with the president, who had sued over the suspension of his account in 2021.

In a court filing, Mr. Musk said he and other investors would pull their $97.4 billion bid if OpenAI withdrew its plan to change its structure.

The Silicon Valley giant said it made the change last year because it was difficult to keep up with every occasion, but some users questioned the decision.

The Chinese start-up used several technological tricks, including a method called “mixture of experts,” to significantly reduce the cost of building the technology.

Think tanks and universities have helped expose problematic Chinese business practices. Now, those businesses are accusing them of defamation.

The executive, Jim Farley, said President Trump’s tariff and auto policies would raise costs and could force the automaker to cut jobs.

Speaking in Paris at an artificial intelligence summit, the vice president gave an America First vision of the technology — with the U.S. dominating the chips, the software and the rules.

The internet erupted in controversy over Felisa Wolfe-Simon and colleagues’ claim of a microbe thriving on arsenic. Nearly 15 years later, she’s pursuing new research on the boundaries of life.

The billionaire is leading a group of investors in the unsolicited offer, which complicates the start-up’s plan to raise more money.

At times, Kevin Roose writes, it feels like he is watching policymakers on horseback trying to install seatbelts on a passing Lamborghini.

Europe wants to be a top contender in the race to become a world leader in artificial intelligence, but investors are concerned that it has too much red tape and that its taxes are too high.

China produces a vast number of STEM graduates, but it hasn’t been known for innovation. Cultural and political factors may help explain why.

The media company Lee Enterprises said a “cybersecurity event” had created havoc at dozens of its newspapers, prompting some to publish shorter editions or not print at all.

Some traders made tens of millions off a new cryptocurrency launched by President Trump and his sons. Many others lost out.

After helping President Trump get elected, Elon Musk was poised to dominate the country’s A.I. policies. Then Mr. Altman sneaked into the White House.