Mars 'jelly doughnut' mystery finally solved (9)

CNET News 2014.02.15 01:35
Where did the infamous rock that seemed to appear out of nowhere on Mars come from? The explanation, it turns out, is more simple than sci-fi. by James Martin Follow @Jamesco This before-and-after pair of images of the same patch of ground 13 days apart documents the arrival of a strange, bright rock in front of NASA's Mars Rover Opportunity.
NASA, MAR, ROCK, PINNACLE, ROVER, DOUGHNUT, Mars, Washington, USA