Ancient Technology
About 10000 years ago people discovered how to extract metal from ores. Evidence shows that they probably discovered copper first. The people would mix copper and tin to make it stronger making bronze. Therefore bronze tools were stronger and lasted longer.
We have come so far since the stone age. Alexander bell invented phone, Thomas Edison improved the lightbulb, and lots of other things. But we still use ancient technology such as pulleys, levers and other great tools made from long ago.