Opportunity Rover Discovers Mystery Rock on Mars
10 years after NASA's Opportunity rover landed on Mars for the first time, a mysterious rock, that looks like a white jelly doughnut, suddenly appears in its radar. (Jan. 24)
By Irene Klotz
CAPE CANAVERAL, Fla., Jan 21 (Reuters) - Scientists are stumped as to how a rock mysteriously appeared in images taken two weeks apart by NASA's Mars rover Opportunity.
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