As a quartet of astronauts make their way to the far side of the Moon, far-fetched notions of human colonies on the satellite or even Mars - a three-year return trip - are again getting an airing.

Space agencies are preparing for longer missions, with NASA’s Artemis program and future Mars plans aiming to extend human ...

With a rising focus on interplanetary colonisation as a safeguard against existential threats, scientists are investigating whether humans can reproduce in space. While significant strides have been ...