If you want to go to Mars, don't expect to get a good night's sleep

One of the unexpected difficulties of mankind's mission to Mars will be ensuring the astronauts get enough sleep. That's one of the newly published findings from the Mars-500 mission, a psychological experiment that simulated how people would cope with a journey to the red planet by cutting off six "crew members" from the real world for 17 months. One of the crew became "isolated" after he slipped out of a 24-hour sleep cycle and into a 25-hour one, putting him out of sync with his colleagues, while others developed sleep deprivation problems and "mild depression." [Source]

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