tomcat wrote:

http://marsrovers.jpl.nasa.gov/gallery/all/spirit.html

Look at the little skinney pictures, not the big ones on top.  And, it
is the NAVIGATION CAMERA, not the Panorama Camera.

You are looking at JPL photos, so this is for real.  JPL doesn't kid
around.

Why you do not just post the link to the picture...? I had a look and I
do not see anything special. The regular patterns on the ground are the
rover tracks.

Greg Ruo