If early humans crafted a hammer or an axe from metal for example. How on earth did they craft the first tool that was used to create that hammer or axe. I know you can create a hammer from natural material like stone and an axe from a sharp piece of stone but how did they forge the first metal tools and even weapons?
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If you like anime, Dr. Stone is great at explaining the science of human advancement. Covers alot of metal work in season 1 and 2.
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