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      Knowledge is Power

      Scientific American September 2003

      The Origins of Water on Earth

      Evidence is mounting that other planets hosted oceans at one time, but ONLY EARTH has maintained its watery endowment

      • By James F. Kasting on September 1, 2003

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      More in the September 2003 issue of Scientific American
      • The Hidden Ocean of Europa
      • The Unearthly Landscapes of Mars
      • Bejeweled Worlds
      View Full Contents
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