Everyone Needs a Good PillowEven Astronauts Bound for Mars

By all accounts sleeping in space is a dream. After a long day of running experiments and rigorous exercise, astronauts on the International Space Station retire to their padded sleep pods, which have just enough room to fit the astronaut, a laptop mounted to a wall, and a few practical items. To prevent themselves from drifting through the station while catching some zero-g z’s, astronauts snuggle into a sleeping bag mounted to the wall of their sleep pod. As they start to slumber, their bodies relax and their arms drift out in front of them, making them look like floating zombies. Absent from astronauts’ bedrooms, though, are pillows. In microgravity you don’t need one—you don’t even need to hold your …