Sailing Stones were (allegedly) recently figured out. http://www.livescience.com/37492-sailing-stones-death-valley-moving-rocks.html http://www.livescience.com

Sailing Stones were (allegedly) recently figured out. http://www.livescience.com/37492-sailing-stones-death-valley-moving-rocks.html http://www.livescience.com/37492-sailing-stones-death-valley...