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A new message board for artificial intelligence agents has prompted some strange conversations, and existential questions about the inner lives of bots.

This mercury-containing compound, used as a vaccine preservative, is commonly used in lower-income countries — and deemed safe. The U.S. is now demanding that Gavi, the Vaccine Alliance stop using it.

If you're procrastinating working out, here's one less excuse. Short gym sessions can be enough to build meaningful strength — as long as you push yourself while you're there.

Federal immigration officers didn't notify the judicial branch before making the arrest, a requirement under state law and the court's rules in many circumstances.

The two sides agreed to create a working group to discuss ways to work through differences as President Trump continues to call for a U.S. takeover of Denmark's Arctic territory of Greenland.

An Israeli airstrike has struck Beirut for the first time since June.

NPR speaks to Mark Cancian, a retired U.S. Marine colonel, about President Trump's speech to the military's top brass Tuesday.

President Trump canceled a meeting to discuss government funding with top Democrats in Congress, leaving no clear path to avoiding a government shutdown next week.

NPR's history podcast Throughline speaks with Ken Burns about his latest documentary, The American Revolution.

Three Texas siblings who died in an icy pond are among several dozen deaths in U.S. states gripped by frigid cold. A massive storm dumped deep snow across more than 1,300 miles from Arkansas to New England.