One Nuclear Leap to Mars?

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Science  15 Aug 2003:
Vol. 301, Issue 5635, pp. 906-909
DOI: 10.1126/science.301.5635.906

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SEMIPALATINSK TEST SITE, KAZAKHSTAN-- At a meeting in June in Moscow, Russian space scientists unveiled preliminary plans to transport people to Mars, including the likeliest propulsion systems for getting there and measures to protect astronauts from overexposure to cosmic rays and the ill effects of microgravity during a 2-year journey to the Red Planet and back.