Most people picture astronauts floating weightlessly through gleaming corridors, and that image is accurate enough during the ...

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, ...

Peak relaxation is when you get home after a long day’s work and lie down on freshly washed sheets spread neatly on your bed.

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 ...

Sleeping like an astronaut, in theory, sounds quite dreamy: floating weightlessly, the sun rising and setting often and fantastically over the vast Earth outside of your spacecraft windows, true ...

Add Yahoo as a preferred source to see more of our stories on Google. On the evening of April 10, four NASA astronauts splashed down in the Pacific Ocean off the coast of San Diego, California, ...

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) ...