How to Go to Mars—Right Now!

Robert Zubrin's Mars Direct approach argues for a series of human missions to Mars that could start as soon as 2014

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Illustration: Bryan Christie Design
During the six-month trip, the habitat spins around the burned-out upper stage of the booster, attached by a tether. The spinning creates enough artificial gravity to counter bone loss and other physiological problems brought on by weightlessness.
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