Full episode 511: The Seven Things You’re Not Supposed to Talk About Act Four Sleep Share a clip Dr. Cady Coleman is a NASA astronaut who has spent more than 4300 hours in space. Our senior producer Julie Snyder asked her what it's like to sleep while orbiting the earth. (3 minutes) More in SpaceView all 655: The Not-So-Great Unknown Aug. 24, 2018 Act One: So Over The Moon Producer David Kestenbaum tells the story of an astronaut who returns with a very unexpected view of the great beyond. Staff RecommendationsView all 562 July 31, 2015 The Problem We All Live With - Part One There’s one thing that has been proven to cut the achievement gap between black and white students by half: integration. 563 Aug. 7, 2015 The Problem We All Live With - Part Two A city goes all out to integrate its schools.