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North Korea's latest nuclear weapons test is much more powerful than the previous two, according to estimates made by instruments that measure seismic waves from the blast. But it's hard to verify North Korea's claim that the test was of a miniaturized nuclear weapon.

A study of more than 85,000 women in Norway found that those who started taking a folic acid supplement four weeks before getting pregnant were about 40 percent less likely to have a child who developed the disorder. Mothers had to continue taking the supplement during the first eight weeks of pregnancy to get the full benefit.

The Kennedy administration commemorated the Emancipation Proclamation with a reception for a virtual who's who of black Americans. However, the Rev. Martin Luther King Jr. stayed away.

Renee Montagne talks to writer Josh Dean about Banana Joe, named best in show at the Westminster Kennel Club. Dean is author of the book Show Dog.

A new video for the Maps & Atlases song "Fever" imagines a deeply troubled man, addicted to a mysterious drug, and in desperate need of a cure. The Chicago-based band seems like it might have the answer he's been looking for.

Comcast, the Philadelphia based cable giant, announced a major deal late Tuesday afternoon. It's buying the 49 percent stake of NBC Universal that it did not already own for 16.7 billion dollars. General Electric is the seller and will also be selling some prized real estate as part of the deal.

The band will perform new songs from its upcoming album, Mosquito, live from Austin, Texas, on March 13. Nick Cave & The Bad Seeds will also appear on our official SXSW showcase, which will be broadcast live on NPR stations and streamed as a video webcast at NPR Music.

The saxophonist and his quartet cross-pollinate Indian classical music and vintage Captain Beefheart to create complicated rhythms and solos reminiscent of jazz-rock fusion.

The week-long manhunt for ex-L.A. police officer Christopher Dorner, recently led to a cabin in Big Bear, which, after an exchange of gunfire, burst into flames, leaving a body inside. Host Neal Conan discusses law enforcement tactics employed and how social media was used during the search.

Latin America's largest economy is growing fast and has plans to put up dozens of dams in the coming years. Environmentalists and residents in some areas are opposed, but the projects are moving ahead rapidly.