Even NASA cannot explain it. It’s best to gaze in wonder at the sliding
rocks on this dry lake bed in Death Valley National Park. Racetrack
Playa is almost completely flat, 2.5 miles from north to south and 1.25
miles from east to west, and covered with cracked mud.
The rocks, some weighing hundreds of pounds, slide across the
sediment, leaving furrows in their wakes, but no one has actually
witnessed it.
ΠΗΓΗ : http://beforeitsnews.com
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