Watch Death Valley’s Rocks Walk Before Your Eyes

August 27, 2014 6:51 PM

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Some scientists use GPS locations to keep track of wide-ranging sharks. Others attach GPS tags to observe the movements of reclusive snow leopards. And then there are the guys who use the technology to study the movements of rocks.

These are the “sliding rocks” or “sailing stones” of Death Valley. First documented by miners back in the 1900s, these rocks range from pebbles to 600-pound (272-kilogram) boulders and seem to move of their own accord. The only evidence of their activity is a series of long, perplexing trails left i...

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