Scientists show how wind and ice move 'sailing rocks' across Death Valley lake bed

  • by: Associated Press
  • Updated: August 28, 2014 - 5:26 PM

DEATH VALLEY NATIONAL PARK, Calif. — For years scientists have theorized about how large rocks — some weighing hundreds of pounds — zigzag across Racetrack Playa in Death Valley National Park, leaving long trails etched in the earth.

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