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There's an explanation and video[1]; I remember thinking the same a few years ago. [1] https://www.nasa.gov/feature/jpl/nasas-curiosity-mars-rover-takes-a-new-

• jerf 6y ago
  Thank you. That's probably a great example of one of the benefits of these rovers running for so long. They'd never have scheduled something so non-science-oriented if they only got the few weeks they expected, but when your mission exceeds expectations by several thousand percent, you have time for such things.