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Nick Bain, 17, was in class one day when he calculated that only "2 1/2 to three hours" was actually useful instruction. So he decided to go out on his own to learn.

For many photojournalists, Instagram has become a "modern-day Polaroid camera" used to take quick snapshots of important issues — and visual media giants have taken notice.

NPR's Robert Siegel speaks with author Timothy Snyder about his new book, Black Earth: The Holocaust as History and Warning. He says Nazi Germany's strategy was the destruction of states.

Sanders concedes that he trails Hillary Clinton for the Democratic nomination, but also notes that some polls show him doing better than Clinton in matchups against the Republicans.

The search is on for heirloom varieties planted at homesteads and coach stops in the late 1800s. The resilient trees, still productive despite long neglect, could prove valuable at a time of drought.

"This is an avoidable disaster," says one expert. And there are at least three things you can do to help.

IBM's Deep Blue beat chess great Garry Kasparov in 1997. Humans and computers play the game differently, but have computers taught humans much about the game?

Filmmaker Gianfranco Rosi talks about his documentary Fire at Sea. The film tells the story of the ongoing migrant crisis as experienced by residents of Lampedusa, an island off the coast of Sicily.

Groups of walruses are vulnerable to disturbances, but it's hard to avoid them if you don't know where they are. A new tool from U.S. and Russian researchers draws on history to protect the animals.

To many parasitic worms, we are the world. And the way they've evolved to live within us — without wiping us out — is stunning.