Arctic megastorm is so powerful it's turning the ice cap into "slush"

A massive storm has been lashing the Arctic, and its fury is so great that it's actually breaking up the remaining ice at the pole and whipping it into a substance that one scientist called "slushy." Over at the awesome DotEarth blog, Andrew Revkin has been keeping tabs on the storm, which is incredibly unusual for… » 8/10/12 1:18pm 8/10/12 1:18pm