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The scientists honored with a Nobel Prize in medicine helped discover that every cell in the body has its own clock. When we ignore those clocks, we increase the risk of weight gain and diabetes.

The unctuous, ingratiating game host was, always, in on the joke, which proved the secret to his enduring appeal.

A group of aviation companies and advocacy groups, backed by Boeing, have announced a competition to develop a safe and easy-to-use personal flying vehicle in the next two years.

These days, it seems like everything bad is happening at once — hurricanes, earthquakes, famine and refugee crises. Share your biggest concerns.

Some of the world's best cacao grows in Venezuela, a country roiled by political turmoil. One chocolatier is betting those beans can propel a whole industry and turn women into micro-entrepreneurs.

Malala Yousafzai, the youngest Nobel Peace Prize recipient and activist for girls' education, shared the stories she heard from her recent trip visiting women around the world at the U.N. in New York.

Trump's megawatt personality immediately became a magnet for viewers on TV, as did his browbeating battles with rivals and news moderators. Even without debates, Trump was seen everywhere on-screen.

Each year, law students argue hypothetical, futuristic case that takes place in space. This year, it's about who pays when two machines collide on the moon.

Researchers have won a prize for discovering that a cow's genetics determine which microbes populate its gut. Some of those microbes produce the greenhouse gas methane that ends up in the atmosphere.

Russia has been less aggressive in Germany's election than it was in the U.S. or France. Chancellor Angela Merkel remains favored — but the Kremlin still could leave its mark.