Why Am I Taller?: What Happens to an Astronaut's Body in Space

What happens in space that causes the body to change? Learn about life in space from astronauts

Is the human body built for Mars? NASA’s studies on the International Space Station show we need to fix a few things before sending people to the Red Planet. Astronauts go into space with good vision and come back needing eyeglasses. Cognition and DNA expression could be affected for years. And then there’s the discomfort of living in a tight space with crewmates, depression, and separation from...