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NASA Mars Rover discovered doughnut rock

One of the NASA’s Mars Exploration Rovers, Opportunity, reached the Red Planet on 24 January 2004.
The Opportunity rover was built for a three-month mission on Mars, but continues to return valuable scientific data even after 10 years.
NASA's Opportunity Mars Exploration Rover search for and characterize a variety of rocks and soils that hold clues to past water activity.
Jlly doughnut rock discovered by NASA Mars rover was revealed on 21 January 2014 on the tenth anniversary of the Mars rover’s landing on the planet.
The researchers named the rock as Pinnacle Island, which is high in composition of three elements sulfur, magnesium and manganese. Researchers said that the rock was the one of the oddest things on Mars that space experts had ever come across on Mars.

The rock is examined and it can be seen as a whitish colour on the outer surface while bearing reddish colour toward its center and looks like sweet desert.
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