While weightlessness in space is fun to watch (we see astronauts float and “swim” around the ISS), long-duration space travel takes a toll on the body. Upon return to Earth, astronauts often ...

Smaller hearts, poorer vision, added height among the effects caused by weightlessness.

Heart cells grown in space showed stronger survival, better function, and boosted healing traits. Spaceflight changed key ...

including exposure to space radiation. An environment with little gravity can also weaken the bones. "We definitely track ...

A biochemist breaks down challenges that astronauts Suni Williams and Butch Wilmore will face after their long duration in ...

Shohei Ohtani may be the best two-way baseball player on planet Earth, but an astronaut who hails from the same country has ...

Barry Wilmore's rehabilitation journey: From weightlessness to gravity Nine months in space, and Barry Wilmore and Sunita Williams are finally on solid ground, but their greatest challenge is yet ...

All station astronauts spend two hours a day in orbit exercising to minimize bone and muscle loss in the weightlessness of space. Even so, Wilmore and Williams will face extensive rehabilitation ...

Heart disease remains the leading cause of death in the United States, accounting for one in five deaths. The inability of damaged heart muscle tissue to regenerate makes heart disease difficult to ...