Metal is essential in our world but how did early humans noticed that that shiny “rock” is usefull
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Chunks of almost pure copper used to just be found lying on the ground, and could be hammered into tools and weapons. Chunks of iron or steel from meteorites too. That was an early part of it. Of course that stuff has been pretty well all scavenged all over the world. Once clay pots and ovens to fire them were invented, smelting metal was discovered as a spinoff benefit
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