Can humans cope with long space travel? Astronaut Scott Kelly spent a year as a guinea pig

A year in space isn't for the faint of heart. Retired NASA astronaut Scott Kelly, author of a new book, “Endurance,” sits down with science correspondent Miles O'Brien to discuss the...

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HARI SREENIVASAN: It's a dream many have had, traveling into space, and then even livingthere for some period of time.Just a small group of people on the planet have done it.That includes American astronaut Scott Kelly.Naturally, our Miles O'Brien had lots of questions about what happens to the human body, andto the person, once back on Earth.It's part of our weekly series about the Leading Edge of science.MILES O'BRIEN: A year in space is not for the faint of heart.Scott Kelly found that out aboard the International Space Station from March 2015 until March2016.Now that he is firmly anchored on terra firma, he's out with a memoir, "Endurance," and asequel to the PBS film "A Year in Space," aptly t...