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Sudan and South Sudan are still threatening one another along their borders. The U.N. is warning both Sudans that they could face sanctions if they can't reverse their escalating feud.

In the beginning, all of the talent was black, but the UniverSoul Circus evolved into an eclectic mix of acts from around the world. Now, the circus is pushing to diversify its audience, with a show called "Us."

Journalists seem to love writing about scientific studies on coffee and wine, and we're no exception. The latest is that a big new study finds people who drink two or three cups of coffee a day may cut the risk of dying from certain diseases, but scientists don't really know why.

The electronic DJ/producer discusses his influences and plays songs from his new album, Vava Voom.

Bike to Work Day is this Friday. And that prompts a question: Do you bike to work? If so, you should prove it — by taking a photo of yourself and your bike. Then share the picture, and we'll consider it for a Bike to Work Day gallery. Post it to Twitter or Instagram with the hashtag #NPRbike.

The New York University student was accused of disorderly conduct, but the video showed him breaking no laws. In a twist, the student had actually been working on a project aimed at portraying police in a better light.

Besides presenting relevant links, Google will now provide information about your searches. Currently, Google said its engine knows 3.5 billion facts.

At Washington, D.C.'s Kreeger Museum, seniors and students are paired together to enjoy the art — and each other's company. "The goal is to make people feel better and to give them a pleasant experience in the moment. That's all there is, really," says program head Derya Samadi.

This weekend, thousands will descend on Chicago to attend a NATO summit. The gathering will focus on Afghanistan, but discussions will also include the future of NATO itself, and whether it can overcome its shortfalls. Recent missions show just how far the alliance is from the solidarity of its early days.

Until 1950, tuberculosis was the No. 1 cause of death in Alaska. Today, many Alaskans still carry the bacteria that can cause the disease. That helps explain why last year, the state had the highest TB rates in the nation. A small team of health workers is trying to turn that around.