Sleep deficiency is pervasive among astronauts before and during space flight, and the reported incidence of sleep-promoting medication use is 20 times greater than the proportion of Americans ...

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, ...

Astronaut Ron Garan sleeps in his sleeping bag on the International Space Station in 2008. (NASA) In March, two NASA astronauts finally returned to Earth after an eight-day mission devolved into a 286 ...

Add Yahoo as a preferred source to see more of our stories on Google. Life on board the International Space Station takes some getting used to. Being weightless affects everything from the way food ...