Re: Earth has them too
Indeed, and a gradient is not needed!
http://archive.magazine.jhu.edu/2011/06/solving-the-mystery-of-death-valley%E2%80%99s-walking-rocks/
Worth noting that Death valley is perhaps the fourth most similar place to Mars to be found on Earth. The Chilean high deserts are closer, also Namibia and - number one? - the cold dry deserts in Antarctica. Anyone know if the rocks walk there also?
Biting the hand that feeds IT
