An interesting phenomena occurs in Racetrack Playa in Death Valley in which rocks, small to large, slide around mysteriously through the sands.
Some of these rocks weigh several hundred pounds. That makes the question: "How do they move?" a very challenging one.
The truth: No one knows for sure exactly how these rocks move - although a few people have come up with some pretty good explanations. The reason why their movement remains a mystery: No one has ever seen them in motion!
Let's learn how they are thought to move....
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