Inventions: We can thank Mesopotamia (probably Ur) for inventing the wheel in about 3500 B.C., which is the single greatest invention of all time. It is used for much more than transportation. The wheel is essential to manufacturing and even pre-digital watches. No American civilization had the wheel until the Europeans brought it to them. | Inventions: We can thank Mesopotamia (probably Ur) for inventing the wheel in about 3500 B.C., which is the single greatest invention of all time. It is used for much more than transportation. The wheel is essential to manufacturing and even pre-digital watches. No American civilization had the wheel until the Europeans brought it to them. |