The Mystery of Death Valley's "Sailing Stones" Is Finally Solved

On a dried-up lake bed in Death Valley are dozens of rocks that have puzzled us for decades. The rocks have each left a dusty trail, evidence of some unknown force propelling them forward. Scientists have now finally observed the rocks moving and settled on an explanation: Thin ice and a gentle breeze. » 8/27/14 5:33pm 8/27/14 5:33pm