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 Space
Staff Recommendations
Three Miles
What happens when of a group of public school students in the Bronx goes to visit an elite private school three miles away.
Pray
Can the secular world and the religious world understand each other?