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A genetic analysis of samples taken from a large UK health database suggest that people who are more sensitive than their peers to the bitter taste of caffeine tend to drink more coffee — not less.

Most people can't tell when they're having the irregular heartbeat called atrial fibrillation that puts them at risk of stroke. Simply learning to take your own pulse could help, researchers say.

One year ago, a terrorist attack at a county office party in San Bernardino left 14 people dead and 22 injured. Survivors of the attack and members of the community say the attack still haunts them.

NPR's Michel Martin talks with Benjamin Chavis Jr., one of the organizers of the Million Man March in 1995, and a consultant for the anniversary march in Washington, D.C., on Saturday.

Since Russia took over Crimea this spring, many Crimeans have gladly switched their passports from Ukrainian to Russian. But not everyone is so eager to become a Russian citizen.

South Carolina repairman Ernest Skelton talked to Caroline Brock about racism at an appointment. Her post about it went viral. David Greene spoke with Skelton, who is Black, and Brock, who is white.

The rebuke came after remarks by President Rouhani that a U.S. war with Tehran would be the "mother of all wars." Noel King talks to Trita Parsi, head of the National Iranian American Council.

The National Center for Environmental Health was hollowed out in the cuts of 10,000 federal health workers on April 1. That's the same day an assessment of people hurt in floods was set to begin.

Long security lines at airports have forced hundreds of passengers to miss their flights. David Greene talks to Department of Homeland Security Secretary Jeh Johnson about what is being done.

Crowds and clouds didn't stop people from gathering across the path of totality. Viewers craned their necks and clapped as skies briefly darkened, a sight the U.S. won't see again until 2044.