In a remote corner of Death Valley National park, cradled in between the Cottonwood and Last Chance mountain ranges, Racetrack Playa presents an intriguing natural history mystery. Here, slabs of dolomite and syenite, ranging in size from a couple of pounds up to 1,000 pounds, leave visible tracks as they slide across the playa surface, without any sign of human or animal intervention. For decades visitors and scientists alike have
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