The preparations for a human expedition of Mars proceed along many research paths. One long-duration experiment in a Mars-base mock-up indicates that female astronauts would consume considerably less food than male ones. Also, the smaller size of their bodies provides an advantage when working in cramped zero-G accommodations and females appear to be generally more able to cope with long-term isolation. All in all important factors when equipping and crewing a spaceship whose voyage will last for a year or two.
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