Living and working in space requires human perseverance.
Future missions will focus on exploration at greater distances from Earth; to the Moon and then to Mars. These missions will mean humans will stay in space for extended durations.
To ensure that these goals are achieved, NASA's astronauts must be able to perform at peak productivity under even the most daunting conditions.
The research and science enables human spaceflight exploration to expand the frontiers of knowledge, capability, and opportunity in space.