The phenomenon of the “sailing stones” on Racetrack Playa in Death Valley National Park has baffled scientists for decades.
By some mysterious force of nature, rocks move along the flat-as-a-pancake playa and leave long trails behind. What causes the stones to move?
Martians? The crop circle folks?
Scientists can say conclusively that these synchronized trails left by rocks, some up to 700 pounds, are caused by thin sheets of ice pushing the rocks across the desert floor under certain conditions.
That’s good to know. Now we can stop worrying about extraterrestrials.