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This was the longest of the three periods. The hominids learnt to carve stone .This tools are called bifaces.
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They perfected tool-making and usd smaller stone chips for caving . They began using other materials, like bone and created new utensils :knives , arrowheads , harpoons for fishing , and sewinng needles.
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The first spiritual and artistic expressions appeared . They made stone figures representing Venus, the goddess of fertility.
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Copper tools and weapons were very fragile
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Bronze, an alloy of copper and tin, was more resistant. They used it to make farming tools and sophisticated weapons
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Iron was more abundant and resistant than the previous metals.
