NASA's decade-old Opportunity rover is on its way up a 130-foot hill in its biggest climb yet. At the peak of Solander Point, the rover will find rocks thrown up by the impact that created the nearby crater, making them older than rocks below. "We expect we will reach some of the oldest rocks we have seen with this rover -- a glimpse back into the ancient past of Mars," said Opportunity principal investigator Steve Squyres.

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