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The drug was approved for people who test negative for HIV infection. It's supposed to be used in combination with safe-sex practices, such as using a condom, to reduce infection risk.

Kenya, like other countries in East Africa, has dropped many of the fees that kept poor children out of public schools. More kids are now attending, but there's a desperate shortage of books, teachers and other basic needs.

As the Motor City rose, it dined on a chili-topped dog that helped immigrants make it in the U.S.

The rain has devastated puffin colonies. On one island 90 percent of burrows were lost.

Wells paved the way for women in country by defying the wisdom of her time.

Wind Creek Casino, owned and operated by the Poarch Band of Creek Indians, is at the heart of rising tension between the tribe and Escambia County…

Police spoke to the woman while investigating the killing of Trayvon Martin.

Many top athletes are rejecting the processed drinks and gels companies are squarely aiming at them. Instead, they rely on old fashioned water and healthy food to rehydrate and replenish nutrients.

Politics has been a profession ruled by gut instinct, gurus and polls. But over the past 15 years, the primary method of scientific advance — the randomized controlled study — has been wheedling its way into politics. Bit by bit, it's challenging a lot of the conventional wisdom that dominates current political campaigns.

Mayer is the fifth CEO to take the helm at the ailing company in five years.