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originally posted by: theantediluvian
A strange microscopic cross within a circle was spotted in an image taken by the Curiosity rover.
Here's the original image. Was this a mark made by the Curiosity rover? Some sort of strange crystalline structure? Or could it be the fossil remains of a something like a diatom? Whatever it is, it's clearly not the run of the mill shadow play and pareidolia. Surprisingly, I hadn't seen this posted yet on ATS but if I missed it my search, my apologies!
More at Unexplained Mysteries (keep an eye out for related items via Obscuragator)