Question

why did hunter gatherers used fire

Answer 1

Our species is called Homo sapiens. We first evolved in Africa around 250,000 years ago, and we had stone tools and fire from the beginning. The evidence of stone tools goes all the way back to 3.5 million years ago, when early members of the Homo genus evolved big enough brains to take two rocks, hit them together and make a sharp edge.

A later species, Homo erectus, had a slightly larger brain and learned how to create and control fire. A larger brain meant that their bodies needed to eat meat for more nutrients, and they started cooking their meals over the fire. Eating meat that was free of bacteria, because it was cooked, allowed for even bigger brains, eventually leading to us.
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