http://marsrovers.jpl.nasa.gov/gallery/all/2/n/1763/2N282882032EFFAZ25P1918R0M6.JPG There are too many coincidences to ignore in this photo. The double-barreled snout is very interesting. I have seen these creatures in other photos, but I can't remember where I saw them. To see the same type of object in several locations adds to the probability of existence, eliminating the "rock or optical illusion" theories.