A new study reveals a hidden risk for Mars missions: astronauts could lose strength even if muscle size stays the same.

Elon Musk has repeatedly said he plans to put humans on Mars, yet the gap between that vision and reality remains wide. The obstacles are not just about rockets or money, but about biology, psychology ...

A newly identified region on Mars may hold the key to future human landings. Researchers found evidence of water ice less than a meter beneath the surface, close enough to be harvested for water, ...

The first astronauts who walk on Mars are now being told to go as planetary detectives, not just pathfinders. A sweeping new scientific blueprint argues that the central task of those early crews ...