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Human bodies use light to help tune their body clocks, and that's true even for some blind people. How does this work? It's a circadian mystery.

Hundreds of people are still being plucked daily from the roofs of their homes or other buildings in New Orleans as the Coast Guard and U.S. military conduct the largest airlift operation in the nation's history. But some residents are defying calls to leave the city.

Agnes Igoye has a lot of gripes about the way women are treated in Uganda. But she has great hope that women will thrive — and that men will get with the program.

NPR's Ailsa Chang speaks with Dr. Elizabeth Benjamin, Grady Memorial Hospital's trauma medical director in Atlanta, Ga., about gun violence and its devastating impact on public health.

Ten years after Trayvon Martin's killing sparked the start of a racial justice movement, a small museum in Sanford, Fla., is working to preserve the Black teenager's legacy.

If you haven't ordered gifts online yet, it may be too late to get them delivered by Christmas. More consumers are shopping online this year and holiday demand is exceeding delivery capacity.

The friends behind the blog 40 Days of Dating are trying a new experiment with one question in mind: Can a yearlong 12-step program make you kinder and more empathetic?

On this Valentine's Day, Renee Montagne talks to a young economist about how he tried to apply the rules of the market to his love life. William Nicolson chronicles his journey to find a girlfriend in the memoir, The Romantic Economist.

Chants calling for "intifada" have been a prominent feature of pro-Palestinian student protests. It's a charged word whose use is perceived differently by people with opposing views of the Israeli-Palestinian conflict.

The CDC has declared racism a "serious threat" to public health. NPR's Steve Inskeep speaks with Dr. Camara Phyllis Jones, who worked for the CDC and now studies race and health at Emory University.