The deal slashes hundreds of reciprocal tariffs between the two countries.

NPR's Mary Louise Kelly speaks with NPR's Geoff Brumfiel and Greg Myre about the upcoming meeting between Iran and the United States.

In Kyiv, dance parties on a frozen river keep spirits — and bodies — warm after Russian strikes shattered Ukraine's energy grid.

Italy's Winter Olympics promised sustainability. But in Cortina, environmentalists warn the Games could scar these mountains for decades.

Between war, protests and government crackdowns, the filmmakers raced to finish and smuggle their portrait of Tehran's underground arts scene to the prestigious film festival.

Julia Loktev's documentary My Undesirable Friends follows young independent journalists covering Putin's invasion of Ukraine.

Ski mountaineering will make its Olympic debut this year, the first winter sport to do so since 2002. Skeleton, luge, ski jumping and moguls are also getting new events.

As Nigeria battles multiple security crises, a single attack in the west left more than 160 people dead and raises new questions about who's really in control.

President Trump's focus overseas may spare China for now, but Beijing still worries that his "America First" rhetoric hasn't softened what it calls U.S. "military adventurism."

Until now, estimating how old a dinosaur was when it died has been a fairly simple process: Count up the growth rings in the fossilized bones. But new research into some of dinosaurs' living relatives, like crocodiles, suggests that this method may not always work.