The Wheel

The wheel was invented about 4000 years B.C.  in the agroculture, in the near and far east countries. The wheel was invented on the American continent around the year 1500. In Europe the wheel was invented around 3000 years B.C., but without a metal string. Then later, they found out, that the wheel was more solid, if they puttet a metal string around the wheel.

Picture from: www.colourbox.dk