The wheel

The wheel

1. The wheel has long been regarded as one of the greatest inventions of all times

   • It was combined with the axle
     • People made wagons to transport loads
       • They used to pull the wagon by themselves
         • After the engine had been invented
           • It was attached to the wheel and axle and moved the wagon more quickly
             • Another wheel was attached to steer the wagon and the car was invented
   • Workers used to carry heavy loads using ramps
     • The wheel and axle had been combined into a conveyor belt
       • Human effort was replaced completely

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