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Mammograms should start at age 50 and be performed every two years until age 74, the U.S. Preventive Services Task Force says. For some women in their 40s, the benefits may exceed the risks.

The judge instructed the jurors to keep working toward a verdict after receiving a note from the panel Tuesday afternoon.

NPR's Ari Shapiro speaks to Mike Halpert, NOAA's deputy director of the Climate Prediction Center, about the odd weather caused by El Nino and if climate change has a role.

A Senate investigation finds that Medicaid programs in 33 states spent more than $1 billion on the hepatitis C drug Sovaldi in a single year.

A British fruit historian convincingly argues in a new book that the pear is "the most exciting of the tree fruits." And she says it's time to revive pear culture and explore the fruit's diversity.

Seriously, do you understand how the Galactic Senate functioned?

The new report says there was an uptick in Taliban attacks and casualties among Afghan forces. It also says ISIS is becoming a greater threat in that country.

Two authors argue that teachers should embrace controversial issues to help students learn the political process. But, they say, context is key.

Faced with 1 million people who left voice mails saying they wanted to buy health insurance, the federal government is giving people two more days to sign up on the federal exchange.

The 13th Amendment abolished slavery 150 years ago, and the National Park Service is presenting "The Death Blow is Final: The 13th Amendment Becomes…