This says half of all missions to Mars have failed. https://astronomy.com/news/2018/11/a-brief-history-of-failed-mars-missions https://astronomy.com/news/2018/

This says half of all missions to Mars have failed. https://astronomy.com/news/2018/11/a-brief-history-of-failed-mars-missions https://astronomy.com/news/2018/11/a-brief-history-of-failed... I guess my point is off world missions could have a lot of unknowns and a lot of failures. But no one really knows.