Not sure what you guys think.
You can also find the original nasa pic here
http://marsrovers.jpl.nasa.gov/gallery/press/spirit/20040518a/MERA_Bonneville_360_L256-A129R1.jpg
To me, it looks like the sand is moving at the base.
PS. thats not my screenshot.

You can also find the original nasa pic here
http://marsrovers.jpl.nasa.gov/gallery/press/spirit/20040518a/MERA_Bonneville_360_L256-A129R1.jpg
To me, it looks like the sand is moving at the base.
PS. thats not my screenshot.