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Changing terrain This series of terrain images taken by Opportunity on Sols 2329, 2337, 2374, and 2404, and compiled into this comparison image by Stuart Atkinson, of UnmannedSpaceflight.com, shows how the landscape has changed for this rover during the last several months. The ripples have given way to a stretch of some of the flatest ground seen by either rover on the entire mission. By all accounts, it should make the rest of the rover's trek to Endeavour Crater a veritable breeze. NASA / JPL-Caltech / Cornell / compiled by S. Atkinson