NASA @NASA
What happens to the body during spaceflight? Find out during a @Reddit_AMA on Thursday at 4pm ET as experts share results from a study that compared astronaut @StationCDRKelly’s bodily functions to his earthbound twin brother @ShuttleCDRKelly. Details: https://t.co/oI7vgfJX92 https://t.co/I30GE2S8o2 — PolitiTweet.org