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THE WHEEL is often described as the most important invention of all time – it had a fundamental impact on transport and later on agriculture and industry. ... Soon, it became common for the wheels to turn around a fixed axle. Wheels with spokes, first made around 2000 BC, were lighter, enabling vehicles to move faster.
The wheel is one of the archetypal human inventions. The combination of wheel and axle has fundamentally changed human society, allowing for transport between towns and cities that would not have been possible otherwise.