Meta is exploiting a lucrative tax break intended to support research and experimentation. Its own accountants say the gambit is risky.

A greatly underappreciated virtue of other presidents was that you could forget about them for weeks at a time.

Employees and security researchers said they had cautioned the company on safely testing its A.I. models and strengthening its corporate infrastructure, but OpenAI did not listen.

A decade ago, Xi Jinping asked if China could master A.I. His push is remaking the economy, challenging the United States and keeping society under control.

British counterterrorism police said the men were arrested after three suspicious vehicles appeared to be traveling toward R.A.F. Fairford early on Sunday.

A lower federal court on Wednesday imposed restrictions on deporting migrants to countries other than their own.

A decade ago, I made a decision about my daughter’s education that I hoped would challenge New York City’s separate and unequal school system. Now 16, she thinks I made the wrong choice.

From Indonesia to Guatemala to Syria, shortages and price increases are leading to protests and blackouts.

In a blistering attack on the court, President Trump said “these are not the people I interviewed” to serve as justices.

Agents expressed concern about being directed by top Homeland Security leaders to use private information to look up voter records in state databases.

Even as Beijing urges the United States not to hype the dangers of A.I., its own spy chief is framing the technology as a threat to the Communist Party’s security.

We can no longer pretend that A.I. is safe.

The eyebrow-raising proposal, delivered during the president’s speech at the midterm convention, would cost $1.2 trillion and would need congressional approval.

The company’s announcement is the most dramatic sign yet that artificial intelligence is fundamentally transforming the field of higher mathematics.

A new U.S. survey anticipates an average increase of 11 percent unless benefits are cut, the highest rate in decades. Other findings also predict a sharp rise.

The towering artwork, added to the campus in 2019, was targeted for elimination after President Trump’s takeover of the center.

The administration has revoked funding for bike paths, and encouraged removing some. A cycling advocate said it is playing on the idea of “that dork on a bike.”

After decades as a coveted address in Syracuse, N.Y., the sprawling Nob Hill complex descended into neglect, squalor and death. One family paid a terrible price.

AI will either be the greatest equalizer ever invented, or the worst source of injustice. We need to start planning now so it makes the world a fairer place.

As immigration arrests hit record highs, ICE appears closer than ever to meeting its goal of 2,000 daily arrests.

Trump does not see himself as a mere president subject to the public’s opinion.

The children’s costume evoked blackface imagery, critics said. “We know we got this wrong, and we are deeply sorry,” the retailer said in response.

The orders come after the Supreme Court ruled June 30 that President Trump’s previous efforts to end birthright citizenship were unconstitutional.

The discovery that chronic inflammation is a cause of myriad illnesses could be this century's biggest medical breakthrough.

Michigan and Minnesota are among at least seven states coping with cyberattacks aimed at disrupting water systems nationwide.

The president decided to buy 11 polar icebreakers after a game of golf with Finland’s president. Experts say it’s far from clear the United States needs so many.

A little-known federal office spent decades investigating potential discrimination by government contractors — until it was stopped by the Trump administration.

The F.B.I. director spent about eight hours at the White House Friday focused on the effort, which led to the subpoenaing of several Times reporters who wrote about the security of Air Force One.