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Polls suggest GOP primary voters really like Rubio, but when it comes to casting a vote they seem less sure. Time might tell whether he can turn his paper appeal into real appeal.

For the first time since 1994, six American teens won the International Mathematical Olympiad.

From big food companies simplifying ingredients, to the U.S. government's new goal to reduce food waste, to a public image crisis for Chipotle, 2015 has been a big year for food.

If it didn't hashtag, did it really happen? We look back on the trendiest hashtags in global development in 2015.

Fresh Air critic John Powers says the five-part BBC America show pulls off something ambitious: It keeps viewers enthralled with its intensity, while catching them in "a lingering emotional undertow."

Millions of people take proton pump inhibitors. But the drugs can increase patients' risk of infections, bone fractures and kidney problems. And trying to stop the drugs can make symptoms much worse.

Marco Rubio was the surprise beneficiary of heavy GOP turnout and made the fight for evangelicals a three-way contest. Bernie Sanders won with younger voters, but not enough voted for him to win.

Ed. note: Tales from the Trail is a column that will take you behind the scenes of politics to see some of the funny, and sometimes outright bizarre...

The states were not counted equally well for population totals used to determine their share of political representation and federal funding for the next 10 years, a new Census Bureau report shows.

Josef Stalin caused a famine when he tried to remake Ukraine's farms. Vladimir Putin is threatening to invade Ukraine — again. For a century, Ukraine has been trying to escape Moscow's grip.