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Soils, cobblestones, new clues?

Soils, cobblestones, new clues?
Soils, cobblestones, new clues? Opportunity took these images of the soils and Martian “cobblestone” beneath her wheels with her Pancam in late March 2018. The soil terrain (left), though plenty solid, can be slippery with all the gravel and pebbles; the cracked and broken rocks (right) tell another story the MER scientists are working on now. NASA / JPL-Caltech / Cornell / ASU