What is a wheel ... and axle mechanism to allow the car to move forward. This toy car has one of these mechanisms at the front and at the back. Wheels come in lots of different sizes. For example ...
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12,000-year-old stones may be oldest example of wheel-like techSome 12,000-year-old stones have been discovered, which may be the oldest example of wheel-like tools. The spindle whorls would feature in a wheel and axle arrangement to allow the spinning of ...
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