Look again.
My qualifications are a pair of eyes.
Look in the bottom left corner, an inch from the bottom and an inch from the left, and describe what you see, that does not comform with the ambient, using your eyes, and your neural ability, if you have any.
Here is the link again :
http://qt.exploratorium.edu/mars/spirit/micro_imager/2004-03-18/2M132842058EFF2000P2977M2M1.JPG
