These four humans have spent a year living in isolation as Martians on Earth

Four volunteers have completed 365 days inside Nasa's simulated Mars habitat in Houston. The mission will guide planning for astronaut health, autonomy and support during distant expeditions.

Four volunteers have spent the past year living in isolation inside a simulated Mars habitat, growing crops, rationing resources and conducting spacewalk-like activities as Nasa studies what it would take for humans to survive on the Red Planet. The ... [2881 chars]