The wheel is often cited as one of the most significant inventions in human history. Interestingly, the first wheels were not used for transportation but as potter's wheels in ancient Mesopotamia. It took several centuries for humans to realize that the same circular design could be used on axles for chariots and carts. The transition from using sledges or rollers to wheeled vehicles revolutionized trade, warfare, and travel, allowing for the movement of heavy goods over long distances. The invention required the simultaneous development of the axle, as the wheel must rotate freely around a central bar. This mechanical breakthrough laid the foundation for virtually all future machinery, from the simple water wheel to the complex internal combustion engine. The wheel remains a universal symbol of human progress and the transition from the Stone Age to the Bronze Age.