Mars exploration family portrait

While most know that Curiosity is not the first rover to explore the Martian landscape with the Mars Exploration Rovers Spirit and Opportunity exceeding their planned missions by a factor of almost 31, you may not know about all the other missions that have tried and many who have failed to reach Mars. Overall the success rate is about 50/50.

Mars exploration family portrait (click to enlarge)

Credit: Jason Davis / astrosaur.us