She flew multiple long-duration missions aboard the ISS, serving as a flight engineer and later as commander, conducting ...

The weird and wonderful world of sleeping in space — and what studies of astronauts tell us about the future of sleep ...

Since the beginning of the space program, astronauts have dealt with the realities of spaceflight from microgravity in weak muscles and space radiation, to sleep deprivation and disorientation. Both ...

Russian astronaut Vasily Tsibliyev hadn’t had a good night’s sleep for 12 days. He was being kept awake on purpose, as part of a study about sleeping on board the space station Mir. On the 13th day, ...