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Our closest relatives, chimpanzees and gorillas, breast-feed their offspring for several years. Some baby orangutans nurse until they are 7 years old. Researchers found a way to test ancient teeth for clues about when humans cut nursing short.

The College of Cardinals is holding its first official meetings Monday at the Vatican. Some want the conclave to start as soon as possible; others want time to get to know each other. The resignation of Pope Benedict XVI has posed challenges for the cardinals as they set out to choose the next pope.

The Senate easily confirmed the nomination of John Brennan as CIA director, that following the dramatics of Sen. Rand Paul, who filibustered against it for nearly 13 hours on Wednesday night. Is this the dawn of a new era of these, old-school, "talking" filibusters? Tamara Keith talks to Audie Cornish.

Preparations at the site of Tuesday's papal conclave include a high-tech scrubbing of the chapel for bugs and electronic monitoring equipment. Wi-Fi will be blocked throughout Vatican City, and cardinals with Twitter and Facebook accounts have been warned.

While its true that noroviruses are "perhaps the perfect human pathogens," as The Journal of Infectious Diseases reports, it also seems that Noma could have spared some of its diners from the pathogens if the staff had read emails from health inspectors.

The U.S. military said in January that it will end its front-line combat exclusion for women; the shift means that women could join elite forces such as the Army Rangers and Navy SEALs in the next three years.

The popular photo-sharing service is adding a video feature. But if the current user experience "ain't broke," should Facebook, Instagram's owner, fix it? We explore the fears about the new feature.

Inspecting seafood for safety hazards is currently the job of the Food and Drug Administration. But U.S. catfish producers want the Department of Agriculture involved, too. Critics say it's just a crackdown on foreign producers who are taking over the U.S. market.

Ed Ward takes a look at Philadelphia's long and complex history of black pop music. Specifically, he looks at small labels like Arctic, where several famous artists got their start — and which has just released a set of CDs covering all 60 of its single releases.

The world is at greater risk than ever from pandemics and biological weapons, health officials said Thursday. In response, the U.S. government is spearheading a global effort to build an early warning system for infectious diseases, drug-resistant microbes and possible bioterror agents.