What Causes These "Sailing Stones" To Move?

Sometimes a good mystery just won't stay solved. Last year, scientists witnessed Death Valley's famous sliding rocks, also known as “sailing stones”, in action, and thought that they had worked out how they move. Now, however, the same phenomenon has been observed somewhere that the previous explana…
by José Lourenço via Facebook at May 24, 2015 at 09:41AM
http://ift.tt/1GuMbQK