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Emma Haruka Iwao, who has been fascinated with the mathematical constant since childhood, set the Guinness World Record for most accurate value of pi.

As NPR's senior national correspondent, Linda Wertheimer travels the country and the globe for NPR News, bringing her unique insights and wealth of experience to bear on the day's top news stories.

More than 6,000 people were killed in over three days when a Sudanese paramilitary group unleashed "a wave of intense violence" in Sudan's Darfur region in late October, according to the UN.

Proposals for chemical plants to use "inherently safer" design practices have been blocked by industry executives and their allies in Congress, despite deadly accidents and the risk of a potential terrorist attack that could harm an entire community or city.

The third-highest crowd in regular-season history saw No. 3 Kentucky Volleyball beat No. 19 Tennessee 3-1 on Sunday afternoon as 6,236 fans packed Historic Memorial Coliseum to watch the Wildcats win their sixth top-25 match of the season and run its winning streak to 17 matches.

In some ways, the House majority leader is the most significant Republican incumbent ousted in a primary since the intraparty rebellion by conservative hardliners began five years ago.

The history of New York's Bellevue hospital is also the history of medicine in the United States. From the days before doctors believed in germs through AIDS, the hospital led the way in innovation.

The site will have a ton of new, high-profile content this fall as it competes with traditional broadcasters and Netflix. But they haven't figured out how to sell these shows to critics or the public.

The volcanologist on the island of Vanuatu who walks barefoot over cooled lava fields tells NPR's Don Gonyea how to see nature at its most primeval.

The unemployment rate is the lowest it's been since late 2008, but the labor force has shrunk. That could be a sign that many Americans still think there just aren't that many job openings out there.