Las Vegas Sun

November 26, 2014

Currently: 62° — Complete forecast | Log in | Create an account

This undated photo provided by the National Park Service shows rocks that have moved across a dry lake bed in Death Valley National Park in California's Mojave Desert. For years scientists have theorized about how the large rocks — some weighing hundreds of pounds — zigzag across Racetrack Playa leaving long trails etched in the earth.

National Park Service / AP

This undated photo provided by the National Park Service shows rocks that have moved across a dry lake bed in Death Valley National Park in California's Mojave Desert. For years scientists have theorized about how the large rocks — some weighing hundreds of pounds — zigzag across Racetrack Playa leaving long trails etched in the earth.