Spending months in space quietly rebuilds an astronaut’s body: bones thin, the heart shrinks, fluid floods the head and can reshape the eyes, and NASA’s study of twins found some of the changes still had not fully reversed months after landing

Gravity does more than pin us to Earth—it holds our bodies together, and astronauts are only beginning to understand what happens when it lets go. The post Spending months in space quietly rebuilds an astronaut’s body: bones thin, the heart shrinks, fluid floods the head and can reshape the eyes, and NASA’s study of twins found some of the changes still had not fully reversed months after landing appeared first on Space Daily .