The wheel dates back to around 4000 B.C when artisans used them for spinning pottery. Later, the Mesopotamians took two discs, stuck one on each end of a hunk of wood and made the world's first axle.

The wheel dates back more than 6,000 years when artisans stuck wooden discs on top of shafts and spun them around, making fancy clay pots and all sorts of modern-day museum fodder. Mesopotamians later ...