Astronaut Scott Kelly on spending a year in space: 'It's hard to sleep'

Get the latest from TODAY

Sign up for our newsletter
/ Source: TODAY
By Donna Freydkin

Scott Kelly holds the record for the longest space mission completed by an American. He tells Megyn Kelly that it’s harder to do just about everything in space, including sleep, and calls it “potentially dangerous” that many people think their lives wouldn’t be any different without science.