NASA's stuck astronauts finally on their way back to Earth after 9 months in space
Butch Wilmore and Suni Williams left the International Space Station in a SpaceX capsule early Tuesday, checking out with the cosmonaut and astronaut.
What happens to the human body in deep space?
Bone and muscle deterioration, radiation exposure, vision impairment -- these are just a few of the challenges space travelers face on long-duration missions, even before considering the psychological ...