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In the U.S., there are about 39,000 cancers associated with the human papillomavirus each year. Doctors say the new HPV vaccine may help reduce the number of cases.

A small but growing number of employers tie financial incentives to losing weight and exercising. The cost of nonparticipation can be so high that critics question whether workers have a true choice.

The first official GOP presidential debate is Thursday night in Cleveland. The top 10 candidates — according to an average of five recent national polls — will be on stage. And the seven other candidates will participate in a forum before the debate.

There were only four candidates on stage in the first round, but 11 contenders attended the prime time debate. Carly Fiorina made the jump to the big stage for this second debate.

Any pick by President Obama is sure to touch off a tough confirmation fight. But who will be at the center of the fray? Here are a few likely candidates.

Most breast cancer cases are in women, so treatment and support are geared toward them. Men with breast cancer can feel isolated. One man was given a pink ice pack.

Dozens of black religious leaders boycotted Mayor Rahm Emanuel's Martin Luther King Jr. breakfast. David Greene talks to Chicago pastor Corey Brooks about the mayor's handling of police violence.

They may be half a world away from each other, but both are dealing with the awful effects of lead poisoning.

Tigers have round pupils, but domestic cats have vertical slits in the center of their eyes. What gives? A census of the shapes of animals' pupils suggests size and way of life each play a big role.

One in five children in the developing world misses out on routine immunizations. How do you recruit them? With town criers, public notices — and even a call to action emblazoned on a garment.