An Avalanche On Mars

Here's the most violent event ever observed on Mars, tons of rock, dust and ice plummeting down a 700-meter cliff at 15 meters per second. It's one of four avalanches the High Resolution Imaging Science Experiment (HiRISE) camera on the Mars orbiter observed on the north polar scarps of Mars. The white material at theā€¦ » 3/04/08 6:30am 3/04/08 6:30am