The most important invention

On my opinion, the wheel is the most important mechanical invention of all time. Without it, the world simply would not exist as we know it.

It is a mystery as to who invented the very first wheel. Credit is given to the ancient Mesopotamian culture of Sumer in about 3500 B.C. This is where the oldest known wheel has ever been found. However, it is believed to have been invented much earlier.
All the modes of our daily transportation such as car, bicycle, scooter, train and even airplane needs wheel. It allows us to move faster from one place to another.