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Facebook has introduced a way for users to log into apps anonymously as a way to build trust and protect privacy. User info would be protected from app developers, but visible to Facebook.

Thank heavens it's not pretty, not thirsty, not useful, not a bother, not nearby. It looks like a mess of rope. But, oh my, is this plant old. Really, really old.

Who doesn't like a contest, especially if it lets you prove that you're smarter than your peers? When doctors played a game that tests their knowledge, patients' blood pressure control improved.

It had weight. It lasted. It got punched, torn, reused. It got us into ballparks, airplanes, buses, theaters. I'm talking about stiff paper — and it's vanishing.

With the help of grow lights and air exchange fans, NASA is growing lettuce on the International Space Station. The scheme could help keep food costs down — and keep astronauts happy tending plants.

Shortages of basic foodstuffs have fueled months of protests against Venezuela's socialist government. Some food producers are smuggling food across the border to get higher prices.

Breast-feeding rates in Mexico are among the lowest in Latin America. But a campaign to encourage the practice featured topless actresses, drawing sharp criticism from some women's groups.

The media blitz underway for Hillary Clinton's upcoming book is "as subtle as a bugle call," says NPR's Ron Elving.

We love raw seafood but can't stand uncooked fowl or pork. Why? A big part of it is the effective lack of gravity in water, a scientist says. Weightlessness gives fish muscles a smooth, soft texture.

Shinseki has resigned his post, President Obama says, hours after the embattled head of Veterans Affairs said he would work to fix "systemic" problems in the VA's health care network.