Millions of years ago, humans were near the bottom of the food chain. Predators, weather, and diseases all posed the threat of wiping our species out. But then, thanks to evolution, humans went from huddling in dark caves to building full-blown cities. How did that happen?

00:00 What If You Lived in the Prehistoric Era?
01:20 STONE AGE
04:38 BRONZE AGE
06:26 IRON AGE


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