A verified account with the @elonmusk handle also recently showed up on Instagram, as the billionaire prepares to take his rocket company SpaceX public. More

China, the U.S., Russia and others have ramped up their contest over artificial-intelligence-backed weapons and military systems. The buildup has been compared to the dawn of the nuclear weapons age. More

The device burned an exterior gate of the house in San Francisco, the police said, and it was unclear whether the artificial intelligence executive was home. The authorities arrested a suspect. More

Plenty of people hate Mark Zuckerberg’s superintelligent, supercharged spectacles. I was ready to hate them, too. More

The authorities said a 20-year-old Texas man charged with throwing a homemade bomb at the gate of Sam Altman’s home had written at length about the threat of A.I. More

Whether you’re looking to manage a health condition, lose weight or simply eat better, we want to hear from you. More

The German carmaker is the latest to scale back plans for electric vehicles in favor of gasoline models. More

A new study from Gallup found that young adults have grown less hopeful and more angry about artificial intelligence. More

The ruling was a setback for the artificial intelligence start-up in its battle with the Defense Department over the use of A.I. in warfare. More

The model, Muse Spark, performed better than Meta’s previous A.I. models but lags rivals on coding ability. More

The company said on Tuesday that it was holding back on releasing the new technology but was working with 40 companies to explore how it could prevent cyberattacks. More

The company’s A.I.-generated answers look authoritative, but they draw on an array of sources, from trustworthy sites to Facebook posts. More

With new systems from companies like Anthropic and OpenAI, hackers can attack with greater speed. The defense is more A.I. More

Companies are scrambling to deal with the glut. More

From our jokes and slang to the White House’s policy messaging, internet “brain rot” has escaped our phones to take over … well, everything. More