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The wheel is one of the greatest inventions of mankind. It is believed that it first appeared in the Bronze Age. The first wheels date back to the period between 3500-1000 BC.
First wheels were made of pieces of wood, later they were carved from the trunk of a tree, which made them very heavy and not very long-lasting and convenient.
After people learned how to work with metal, they began to make wheels out of it. The wheel was used as a means of transporting things and people and its appearance led to building the first roads and bridges.
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