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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.

Truvada, the first HIV prevention pill, costs about $13,000 a year, and it's not clear whether insurers will pay for it. And while taking a daily pill sounds simple, the new prevention strategy involves some complicated issues.

Tennessee lottery officials say they’ve set another record with more than $323 million raised this year for state education programs. That’s a 10.2%…

The Kentucky Arts Council is accepting applications from craft and visual artists who would like to be part of the Kentucky Crafted Program through Aug.…

Separate mass shootings at opposite ends of North America have left dozens wounded and at least two people dead.

A new Tennessee Department of Education report addresses educators’ concerns about the way certain test scores are used to evaluate teachers. The report,…

Also: Mass casualties after shootings in Toronto and Tuscaloosa; North Korea names new army vice marshal; Fed's Bernanke to testify about economy; court martial set to begin in Texas air base scandal.

"I'm not a hero — anybody would have done it. I did it out of normal instincts," says Steven St. Bernard. But he saved a little girl from death or serious injury. The autistic child had been dancing on top of a window air conditioning unit.

"I was in shock. I thought, 'Oh, my God," says a passenger who was injured when a needle punctured the roof of his mouth. Needles were found in five sandwiches aboard five flights to the U.S. on Sunday.

Emails from the big British bank suggest traders tried to manipulate a key interest rate. Now regulators in Europe and the U.S. are looking into whether other banks also gamed the numbers.