One Twin Went To Space For a Year, When He Came Back The Changes Were Compelling

The Opposite May Be True

Extended space travel may turn out to be highly risky and damaging to humans. And that brings into question how in the world, or out of the world, humans will be able to maintain long-term space exploration if their bodies age prematurely? Or do we make great sacrifices for space exploration and accept the risk? No one is making that decision yet, but the study raises a new, serious concern.