The word wheel comes from the Old English hwēol, of Germanic origin, from an Indo-European root shared by Sanskrit cakra ‘wheel, circle’ and Greek kuklos ‘circle’.The oldest known wheel found in an archaeological excavation is from Mesopotamia, and dates to around 3500 BC, a relatively late chapter in the story of the development of human civilisation really.One of the reasons why the wheel was invented only at this point in history (The Bronze Age) is du [...]