Sailing Stones
Made by 
Poland, posted in Geography, on August 13, 2012 11:49 pm
How is it possible that they are moving?
Geologists think that this is due to wind and mud but wind can’t move stones which weight as much as human.
Some people think that this happens because of freezing water at night in winter, which creates ice sheets.
Widespread winds in Death Valley are able to move the stones.
