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Planetary scientists have announced that there is evidence that liquid salt water flows on present-day Mars.

A large study confirms that a test doctors have been using for a decade works well for low-risk patients. More work is needed to draw conclusions about chemotherapy for women with riskier tumors.

It's not just a developed world problem. One of the authors of Food Foolish talks about the problem in low-income countries, where food often decays in the fields or spoils on the way to market.

Sen. Chuck Grassley has sent a letter to government investigators that also asks for a list of documents and information the charity failed to provide.

Californians have really stepped up water conservation due to the drought. Some cities are selling almost half as much water as they normally do. But there's a big downside for water agencies — lost revenue. People using less water means major budget shortfalls.

Americans once made sour drinks like shrubs and switchels and preferred tart strawberries and cherries. Then sugar became cheaper and ubiquitous. Now sour is returning in fermented foods and drinks.

Eighteen charges remain against Menendez and an eye doctor, Salomon Melgen. The men are accused of engaging in a bribery scheme involving lavish trips and political campaigns.

Beset by a record of flight delays, dismal passenger satisfaction and widespread tech glitches, the nation's second-largest airline is seeking ways to restore customer confidence and employee morale.

NPR's Ari Shapiro talks with John McCormack, senior writer for The Weekly Standard, about the challenges ahead presented by the demands of the Freedom Caucus.

Senators agreed to limit debate on a measure to fund the government through Dec. 11 without stripping funding from Planned Parenthood. They're expected to approve the bill and send it to the House.