NASA's Scott Kelly spent a year on board the International Space Station to test the effects of space travel on his body, while his identical twin and fellow astronaut
Mark Kelly remained on earth. WIRED's Robbie Gonzalez speaks with Dr. Francine Garrett-Bakelman, lead author of "The NASA Twins Study: A multidimensional analysis of a year-long human spaceflight," to hear about the groundbreaking results of their study and to find out what it means for the future of human spaceflight.