Curly hair kept early humans cool and made our brains bigger

Scientists testing different textures of human hair have found the curlier it is, the better it is at protecting us from heat and solar radiation.

Curly Hair Keeps the Head Coolest, Smart News

Curly Hair Kept Early Humans Cool

Why do humans have such big brains?

Can we assume that the original hair type of modern humans is

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The Human Brain Has been Getting Smaller Since the Stone Age

Can we assume that the original hair type of modern humans is

Curly hair kept early humans cool before air conditioning •

Curly Hair May Have Been Key to Human Brains Growing So Big