It's like the maritian rover is...

sniffing it's own butt. Ok that was almost potty humor, but it's kinda true:

http://marsrovers.jpl.nasa.gov/gallery/press/opportunity/20050103a.html

It's investigating it's own ditched heat shield. Yes NASA litering the solar system with new and ususal junk. It would have been funny had they packed some McDonalds cups and fry containers in there to just give Mars that at home on the interstate feeling for the next visitors...

Ya know?