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 ...

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 ...

Scientists are learning what short and long-duration space missions do to human bodies. Some changes are common like a puffier face, bone loss, and less sleep. Here are nine ways the harsh conditions ...

It's hard being in space. You're isolated from friends and loved ones, your mitochondria get damaged, you get dumber, and you might just get stranded for months at a time (and get under $1,500 for it) ...

Suni Williams and Butch Wilmore returned to Earth on Tuesday after spending nine months in space. The two were stranded on the International Space Station after their Boeing spaceship malfunctioned ...