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Nature 422, 653 (17 April 2003) | doi:10.1038/422653a

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NASA homes in on sites for Mars exploration

Tony Reichhardt

After more than two years of deliberation, a committee of planetary scientists has picked the landing sites for NASA's two Mars Exploration Rovers, due to launch between May and July this year. The two locations — Gusev Crater and Meridiani Planum — have been chosen because of the high likelihood that water, and perhaps life, once existed there.