As NASA's Curiosity rover passes 4,000 'sols,' or Martian days, on the Red Planet, a Space.com reporter who began work in 2012 reflects on what that means.

NASA's Curiosity Mars rover celebrates 4,000 'sols' on the Red Planet

Source: space
Source Link: https://www.space.com/nasa-curiosity-rover-4000-mars-days-water-search