As imposing as the problems of extended space flight seem, most experts are confident that humans can survive the journey to Mars. But in what shape will they be when they get there? Says NASA Physicist Wendell Mendell: "It doesn't do you much good to deliver a human to the Martian surface if that human is inert for a time after landing."
Despite the experience gained from Apollo moon shots and the longer Skylab missions, U.S. doctors have some doubts about the ability of humans to withstand the effects not only of prolonged weightlessness but also of the transitions from gravity...
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