Featured Image: The watermill, the earliest machine harnessing natural forces (apart from the sail) and as such holding a special place in the history of technology,^[1] was invented by Greek engineers somewhere between the 3rd and 1st centuries BC.^[2][3][4][1] Here a Roman gristmill as described by Vitruvius. CREDIT: Xvazquez SOURCE: Wikipedia (Public Domain).

From youtube uploaded by LifeAndHistory101

Published on May  8, 2013