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I Forge Iron

Stone age heat treating

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Very interesting. I wish the headline didn't say that they "shaped" stone tools with fire. What the author means is that they used fire to make stone easier to shape. Much like annealing steel, really. Modern knappers sometimes do the same thing with tougher rocks. There's an old myth that American Indians made tools by dripping water onto hot stone, causing flakes to spall off. Pure hogwash. The headline kinda plays into that.

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