Image: Curiosity Mars Rover Drilling into Its Second Rock Robert Zimmerman, BehindtheBlack.com; in re: Mars: Curiosity’s damaged wheels as it ascends a Mount Sharp. The camera aimed at all the wheels, took pictures. I compare treads; no real change. A good sign. . . . The happy-face crater, on dry ice that’s slowly going away, and is not seasonal. https://behindtheblack.com/behind-the-black/points-of-information/curiosity-checks-out-its-wheels/