Mars Opportunity rover finds mysterious doughnut-shaped rock

Scientists are puzzled by a white rock with a dark red low spot in the middle that “just plain appeared at that spot” on the planet where the rover is situated, says Steve Squyres, lead scientist of the Mars Exploration Rover mission.

Two photographs taken by Opportunity 12 days apart showed only barren bedrock on mission day 3528 (in Mars time), however on day 3540, a photograph of the same area revealed a mysterious, doughnut-shaped rock (was not there before). Curious!

Mars Opportunity rover finds mysterious doughnut-shaped rock
Mars Opportunity rover finds mysterious doughnut-shaped rock
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