On Mars, a Second Chance for Life

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Science  17 Dec 2004:
Vol. 306, Issue 5704, pp. 2010-2012
DOI: 10.1126/science.306.5704.2010

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The Mars rovers, with the help of remote-sensing spacecraft, have sniffed out water and found the remains of one or more ancient environments where life could have survived. Indeed, early Mars is looking wetter and wetter. For an expanded version of this section, with references and links not found in the print edition, see