Clinics are using stem cells to treat problems ranging from arthritis and torn tendons to paralysis and stroke. But is there any evidence that the treatments work?

"Selma" director Ava Duvernay brings her talents to TV in "Queen Sugar, a new series about three very different siblings forced to run their father's sugar cane farm.

There's a national trend in education to document and measure what's taught. In some cases, it's driving good veteran teachers away.

Alex Longo hopes to be the first person to walk on Mars. Until then, the high school sophomore is a finalist to pick the landing site for the next rover mission.

"It's bluer in color up there than other parts of the planet, and there are a lot of storms," a Juno mission leader says of the gas giant's northern reaches.

Drivers burned more than 405 million gallons a day in June, the most ever. But more efficient cars and an expected decline in auto ownership could mean the peak will soon be in the rearview mirror.

The Brazilian actor gained 40 pounds for his role as the drug kingpin. Getting back in shape "wasn't only about losing weight, but getting rid of that character."

School nurses play a critical role in identifying students with mental health disorders, but there aren't enough of them and they often don't have enough training.

In an election cycle filled with sharp disagreement, one man has landed on a platform everyone can seem to get behind: taco trucks on every corner.

Gun shop owners and public health workers in Colorado are finding common ground amid rancor over guns and politics. They are collaborating to reduce suicides involving firearms.