Four volunteers entered a simulated Mars habitat on Sunday, where they are expected to remain for 378 days while facing a range of challenges designed to anticipate a real-life human mission to ...

A tiny surgical robot in residence at the International Space Station completed its first surgery demo in zero gravity on Saturday, developers of the technology exclusively told CNN. The robot ...

Four crewmembers will live in a 1,700-square-foot 3D-printed habitat at NASA's Johnson Space Center in a simulation of a Mars mission.