https://loopvids.s3.amazonaws.com/Oct04Post.mp4
The stone age ended and the bronze age started when ancient humans figured out how to use metal.
Most historians figured it was by accident.
Most groundbreaking discoveries are by accident.
Most of the tech inventions of the 70's were unexpected byproducts of the space race in the late 60's.
Bronze and other metals exist as ore.
Mixed in with rocks.
They suspect that somebody had a fire, like they normally did.
And they found that part the rock melted out when it got hot.
And reformed.
And the ref