Above is how the comic ran. Below is how I wanted to do it, but was unsure of NASA copyright at the time. Turns out, NASA images are not copyrighted, so I could have.
The truly amazing thing is Spirit and Opportunity were supposed to be 90-day missions. Spirit ran for 7 years and traversed more than 7.7 kilometers. Opportunity reached its 12th year of operation, traversed more than 26 kilometers, and is still operational at the time of this writing.
