DeepSeek’s success embodies China’s ambitions in artificial intelligence. But it could also threaten the grip on power the nation’s leaders hold.

Since the Chinese company’s chatbot surged in popularity, researchers have documented how its answers reflect China’s view of the world. Some of its responses amplify propaganda Beijing uses to discredit critics.

In a meeting with Meta employees on Thursday, Mr. Zuckerberg also doubled down on recent changes to the company’s online speech policies and ending its diversity initiatives.

Russia’s president flattered his American counterpart as “smart” and “pragmatic,” and repeated Mr. Trump’s baseless claim that the 2020 election was stolen.

As trust in medicine declines and vaccine hesitancy spreads, doctors are changing how they talk about lifesaving childhood shots.

Kash Patel’s public comments on the QAnon conspiracy theory suggests he sees its adherents more as an audience to be courted rather than an ideology to follow.

Axel Rudakubana on Monday admitted committing the deadly attack last July. Officials later said he had been referred to a government counterterrorism program three times before his rampage.

In a wide-ranging interview, Xavier Becerra, President Biden’s health secretary, defended his tenure and hinted that he might run for governor of California.

A new report details how a covert influence operation linked to the Kremlin continued to place ads on Facebook despite U.S. and E.U. prohibitions on doing business with the organization.

In its original form, the virus survives in just two countries. But a type linked to an oral vaccine used in other nations has already turned up in the West.

As Republican voters embraced a practice that Donald J. Trump railed against for years, softening his tone only slightly in 2024, the party eroded a key Democratic advantage across the country.

After visiting President-elect Donald J. Trump in November, Mr. Zuckerberg decided to relax Meta’s speech policies. He asked a small team to carry out his goals within weeks. The repercussions are just beginning.

Meta is joining X and YouTube in shifting moderation to users. Are you ready?

The social networking giant will stop using third-party fact checkers and instead rely on users to add notes to posts. President-elect Trump and his conservative allies said they were pleased.

The president-elect and his allies have spent four years reinventing the Capitol attack — spreading conspiracy theories and weaving a tale of martyrdom to their ultimate political gain.

In a barrage of posts rife with misinformation, he revived questions about a child sex abuse scandal, vilified the prime minister and defended a jailed far-right agitator.

President-elect Donald J. Trump’s picks for the F.C.C. and F.T.C. have vowed to remove censorship online. That conflicts with European regulators who are pushing for stricter moderation.

On the internet, the truth and the manufactured lies about celebrities are hard to sort through.

Many Haitian immigrants work at an Amazon warehouse near Springfield, packaging thousands of holiday gifts. But after Donald Trump won the election, some worry about their future.