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Wheel

✨ c. 3500 BCE, Mesopotamia

The wheel is one of the oldest technologies used to make movement easier. The earliest known wheels date from about 3500 BCE, although their invention probably developed from earlier knowledge of sledges, rollers, and woodworking. Archaeologists have found very old wooden wheels in Europe and the Near East, but it is difficult to identify a single inventor or place of origin.

At first, wheels were mainly used for pottery and later for vehicles. A wheel works by turning around an axle, replacing much of the sliding friction that occurs when an object is dragged. This simple change can greatly reduce the effort needed to move a load. The wheel became especially useful when combined with an axle, allowing carts and other vehicles to carry heavier loads over longer distances.

Its design also evolved: wooden wheels could be reinforced, spokes made them lighter without sacrificing too much strength, and later materials such as iron, steel, rubber, and modern composites expanded their uses. Today, wheels are found in bicycles, cars, trains, machines, clocks, and many industrial systems.

They are not limited to transportation: gears, pulleys, and other rotating mechanisms rely on the same basic principle. The wheel is therefore less a single invention than a fundamental engineering idea that has been adapted to countless purposes.

💡 Did you know?

Did you know that the wheel was not invented for carts? The first humans to use it were potters! They invented a rotating round plate to give a perfect shape to their clay jars and vases. It was only later that it was thought that it could be used to roll.

For a very long time, wheels were large disks of solid wood that were very heavy. It took another 1,500 years for inventors to think of making holes and adding 'spokes' (the small sticks in the middle). This made the wheels much lighter and the war chariots incredibly fast!

Certain large civilizations, like the Mayans or Aztecs in America, knew the wheel but only used it for children's toys! They didn't have large animals like horses to pull carts, so the wheel didn't seem very useful to them for transport.