I watched, a few years ago, Curiosity’s landing on Mars. We expected it to work for two years probably less. 3000 days later, it’s still active and we keep learning about life on mars. It has changed our knowledge and, more than that, the way we look at Mars. Thank you.
https://mars.nasa.gov/news/8832/nasas-curiosity-rover-reaches-its-3000th-day-on-mars/