Mars 500 astronauts speak after simulated journey to Red Planet

Crew members of the Mars 500 project remain on friendly terms after their simulated 520-day 'mission' to the Red Planet. The experiment aims to answer one of the big unknowns of deep-space travel: can people stay healthy and sane during 520 days rocketing to and back from Mars?

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Mars 500 astronauts speak after simulated journey to Red Planet - video | Science | guardian.co.uk