|  |  | One of the worlds most puzzling mysteries: the moving rocks of Death Valley flickr.com — These rocks, some as heavy as 700 pounds, are inexplicably transported across a virtually flat desert plain, leaving erratic trails in the hard mud behind them, some hundreds of yards long. They move by some mysterious force, and in the nine decades since we have known about them, no one has ever seen them move.More... (Environment) Comments Email Added 2007-08-13 12:00:15 zaibatsu