Nature Wonder - Sailing Stones | Moving Stones | Moving Rocks of the death valey

The mysterious moving stones of the packed-mud desert of Death Valley have been a center of scientific controversy for decades. Rocks weighing up to hundreds of pounds have been known to move up to hundreds of yards at a time. Some scientists have proposed that a combination of strong winds and surface ice account for these movements. However, this theory does not explain evidence of different rocks starting side by side and moving at different rates and in disparate directions. Moreover, the physics calculations do not fully support this theory as wind speeds of hundreds of miles per hour would be needed to move some of the stones. Some stones travelled in one direction for some distance then changed the direction and travelled some more distance. No stone is moved in summer. All movements are said to be occured in winter.