Take a moment to examine the photograph above.
What do you see?
Take your time, be patient and focus on what's leaning against the big rock just left of center.
For scale, the boulder above is roughly one meter in diameter.
3. Now we have figuratively and literally reached our destination. I have previously emphasized that you should pay close attention to Kilroy's rock and notice how its appearance evolves over the course of the six days Spirit spent at Bonneville.
Finally, it's time to see why I have gone into so much detail presenting context and background…
2. Ok, so you've had a good look at "the rock" imaged by the Mars Exploration Rover Spirit (MER-A) on sol (Martian day) 66. You have some perspective as to where it sits (next to the rim of Bonneville crater) and what's around it (near a large relatively darkly colored rock and close to a smaller rock with an X on it's end.) You have also…
An analyst born 53 days before NASA. A midwesterner now living in the southeast. 
