Moving rock on Mars

A very interesting event has occurred on Mars; a rock that wasn't there in an earlier photo from the Opertunity Rover appeared in a second photo, much to the puzzlement of scientists. (pics and story at the link)

In other news, our blogger, Ken, has been gone for a while to parts unknown. Perhaps very, very distant parts?

I think these two events are overly coincidental, so are likely connected.

Ken, why did you move that rock?