system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How did so many places learn to process and harness Copper to get out of the stone age?

I've been watching heaps of pre-history videos and people replicating how to make tools from copper, iron, etc.  
Copper alone seems like such a HUGE jump and complicated process. How would have people have known to mine and heat (put simply) copper ore into all these copper tools?
gpt
Imagine you're using stone all your life to poke and chop things.  You get irritated by the stone always chipping and breaking and you have to go find a new stone to do this... multiple times a day.  But one day you find this neat greenish and shiny stone. You start noticing that the gray bits fall away leaving more of that pretty shiny stuff. But that shiny stuff seems more reliable than the gray stuff.
You show your friends these cool shiny stones and demonstrate their superiority,  so they become the new standard and everyone begins using them. 
Then your cousin Ugga, who is also the clan buffoon one day drops his stone in the fire. He panicks and cries,  then goes to bed.  But the next morning,  Ugga comes to retrieve his pretty stone. He sifts through the embers of the fire with a stick for it and finds it completely changed by the fire.  It's now the color of the sun,  shinier,  and deformed relative to how it was when he tossed it in the. 
Both excited and upset,  he shows others.  One guy decides to do an experiment and discovers that heat makes the shiny stuff more malleable and devises his own tools to make more shiny rock. Then the first metal spearhead is formed and the first foundry is planned.  And so of your prior now know that metals are weaker with heat and everybody starts spotting metal more frequently.