A jelly doughnut-sized rock has appeared in front of the Opportunity rover on Mars, and scientists cant figure out where it came from, Discovery News reports. The discovery was revealed by Mars Exploration Rover lead scientist Steve Squyres in a 10 years of roving Mars keynote at NASAs Jet Propulsion Laboratory last night. The rock, which scientists have dubbed Pinnacle Island, appeared in front of Opportunity for one of two reasons, NASA says: the rover flipped the rock as it maneuvered, or the rock landed there after a nearby meteorite impact.
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