Astronaut Peggy Whitson: How space changed my body
Astronaut Peggy Whitson has spent 675 days in space, more than any other American. She's also the worldwide female record-holder for time spent in space. So if anyone knows how space affects the human body, it would be her. Peggy sat down to talk us through them, as well as why she's compelled to keep going back.
Produced and edited by Tom Heyden
