3/10 includes a lot of older missions and non-us missions. The US has quite a good track record for Mars missions. As time goes on we get better and better.

3/10 includes a lot of older missions and non-us missions. The US has quite a good track record for Mars missions. As time goes on we get better and better. More info here: http://www.reddit.com/r/science/comments/xnoog/30_success_rate_landing_on_mars_is_anyone_else/ http://www.reddit.com/r/science/comments/xnoog/30_success_ra...