Check out this:
http://marsrovers.jpl.nasa.gov/gallery/press/spirit/20050819a/dd_enhanced_568b-B558R1.gif
Robin
Where I come from, we called those whirlwinds.
Cool! But I suspect that they are small hunting pack of mini tornadoes looking for or anticipating a future mobile home park.
MarkB
Mini mobile home parks, or is this just the behavior of young tornadoes learning technique so they’ll be ready when they reach height and velocity puberty?
Are you sure those aren’t Tasmanian Devils?
Eek! eeeek! Emm’s a gonna get smoted! (hastily backing away from emmline and looking nervously around)
I’ve always found it exhilerating to see footage from Mars, this being no exception. I dunno, there’s just something very neat about seeing things on another world, no matter how barren. 
I did not realize that there would be enough of an atmosphere to allow such a phenomenon. Fascinating.
So. . .where’s the line for volunteers to go visit in person? I want in.
Mark
Wow… cool