Weather.com, 6/29/13- Terrell Johnson
On the windswept desert floor of Death Valley, there's a place where rocks move across the ground all by themselves. No one has ever seen them move, and no one knows how they do it.
No one would know they move at all if it weren't for the trails they leave behind in Racetrack Playa (pronounced PLY-uh), a nearly 3-mile-long stretch of flat ground in Death Valley National Park that has attracted scientists, researchers and curious observers ever since the stones were first discovered nearly a century ago.
For more information please see TheWeatherChannel.com
Comments
... perhaps the earth is
... perhaps the earth is rotating under them when the surface friction is lessened, is there a direction to the trails relating to our rotation?