Fossilized ripples from a long lost Martian sea--or lake--have planetary scientists more eager than ever to get their hands on actual samples of the red planet, something the agency's top science planner says could happen as early as 2016. The latest Mars findings illustrate how NASA hopes the exploration program President Bush launched in January will proceed in the decades to come. New discoveries will fine-tune details within the broad outlines Bush ordered of using robots to ...

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