Back in 2008, the HiRISE camera on the Mars Reconnaissance Orbiter returned an astonishing photo showing Mars to be a dynamic and active environment.  The approaching martian summer had melted ground ice, and weakened part of one 700m high wall of the canyon, which had collapsed in a dusty avalanche just as HiRISE was passing over.  Now, Bernhard Braun has released his own images of the event, the result of intensive 3D processing to produce a beautiful visualisation of what was going on.  Read this article at Universe Today for more information.