While I was watching a documentary on our local PBS, an interesting bit of historical information was presented. The location of the travelogue was in Carrara, Italy, where they have carved slabs of that fabulous Carrara Marble out of mountainsides for thousands of years. Michaelangelo went there to select the stone for his "David", so the guide said. The tour guide showed the method used by the Romans to split the stone. The Romans bore holes in the marble, inserted wood (perhaps oak) pegs and then wet them. The force of the expanding wood split the marble as needed. So there you have it. Water and Wood, a force that can "move" mountains.