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Ultraviolet light can burn your skin and raise the risk for skin cancer. New research has helped uncover how the rays can weaken skin's outer layer, compromising its ability to protect the body.

Mount Sinai School of Medicine is adding a Department of Family Medicine. It is now one of the only top medical schools to offer family medicine as a specialty for its students.

Coal is poised to replace oil as the world's top energy source — possibly in the next five years, according to the International Energy Agency. The rise will be driven largely by growth in China and India, the IEA says, while the only large decline is seen coming in the United States.

As two climbers attempt Yosemite's most daunting cliff face, documentarian Nick Rosen, co-writer and co-director of Valley Uprising, explains the park's history of climbs and culture clashes.

Republican Leader Mitch McConnell and his top aides are warning the detonation of the so-called "nuclear option" will backfire on Senate Democrats after...

Following the success of the Syriza party in Greece, another populist anti-austerity party is topping political polls in Spain, and could win power in elections this fall.

Deflategate tops a "tough year" for the League, says Commissioner Roger Goodell. The NFL has also grappled with domestic violence and child abuse claims.

The top contenders in Nigeria's election are incumbent Goodluck Jonathan, who has battled an Islamist insurgency for years, and a former military leader who promises to be tough on corruption.

Some of the biggest leaders in world soccer have been charged with corruption stretching back decades. Reaction from around the world is pouring in as the story continues to unfold.

The competition is fierce: the defending South Korean champion, a 15-year-old Russian phenom who has thrilled the figure skating world, and three Americans heading into Thursday in the top 10.