A '''water wheel''' is a mechanism that harnesses the energy in flowing water to grind grain or to power machinery. It was used in many parts of the world, but was especially common in [[Europe]] from 1200 to 1900 A.D. | A '''water wheel''' is a mechanism that harnesses the energy in flowing water to grind grain or to power machinery. It was used in many parts of the world, but was especially common in [[Europe]] from 1200 to 1900 A.D. |