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After having trouble obtaining drugs needed for lethal injections, state officials plan to change the primary method of execution to nitrogen gas inhalation. It would be a first for a U.S. state.

The evolution of artificial intelligence has exploded over the past five years, leading to computers that can drive and talk. New York Times' Cade Metz explains how machines are learning on their own.

The discovery suggests an earlier start to the Middle Stone Age in Africa than previously documented. It also offers clues to early social networks and symbolic art by human ancestors.

Its competitors often complain that unfair trade practices have helped China become the world's top exporter. Now, the Trump administration seems increasingly likely to confront China on trade.

They say it shows his willingness to solidify his role as Saudi Arabia's next king. U.S. intelligence analysts reportedly think he believes his mother opposes his rise to the throne.

NPR's Ari Shapiro speaks with Michael McFaul, former U.S. Ambassador to Russia about the U.S. response to attacks on Russian ex-pats in the U.K., and the latest sanctions imposed against Russia by the Treasury Department.

Pediatrician T. Berry Brazelton revolutionized the way parents interacted with their babies and young children. His career spanned more than half a century and included dozens of books, hundreds of publications and a TV show. He died Tuesday, just shy of his 100th birthday.

Cobalt used to be a byproduct of copper mining, used in everyday, boring stuff like tires and magnets. Now it's one of the most important and sought after metals on the periodic table. This has implications for big tech firms like Apple.

There are no survivors from the crash of the HH-60 Pave Hawk helicopter. U.S. military officials say the aircraft went down after hitting a power line in western Anbar province.

Our usernames and passwords, to all kinds of websites, are for sale on the dark web. Some, like bank account passwords, are obviously valuable. But hackers can extract money from this information in all kinds of creative ways.