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Crew from Nasa's simulated Mars mission emerges after 378 days in isolation

The four members of a crew who took part in a simulated mission to Mars have emerged after 378 days in isolation ​at the US space agency’s Johnson Space Centre in Houston, an endeavour designed to help prepare for a ‌possible future excursion by Nasa astronauts to Earth’s planetary neighbour. “It’s been a hell of a year — analogue astronauts living in captivity of our own free will,” Ellen Ellis, the medical officer on the Crew Health and Performance Exploration Analogue (Chapea) mission, said i