On Mars, A Rock Appears Where There Wasn't One Before

Nicknamed Pinnacle Island, a fist-sized rock appeared in front of the Mars rover Opportunity a few days ago, and NASA isn't sure where it came from.

Scientists overseeing the Mars rover Opportunity, which landed on the red planet 10 years ago this month, are baffled by their latest discovery: a small rock.

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Published on January 17, 2014 11:11
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