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    How We'll Live on Mars on Ted_talks Sphere from

    by Stephen Petranek It sounds like science fiction, but award-winning journalist Stephen Petranek considers it fact: Within 20 years, humans will live in Mars. We’ll need to. In this sweeping, provocative book that mixes business, science and human reporting, Petranek makes the case that living on Mars is an essential back-up plan for humanity, and explains in fascinating detail just how it will happen.

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