Curly hair kept early humans cool and made our brains bigger

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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.

Human Brain: Facts, Functions & Anatomy

Curly hair kept early humans cool and made our brains bigger, study finds - BBC Newsround

Curly hair kept early humans cool before air conditioning •

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Curly hair may have evolved to keep early humans cool, study

Why do humans have such big brains?

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Curly hair kept early humans cool and made our brains bigger

Curly hair may have evolved to keep early humans cool, study

Evolutionary Role of Curly Hair: Keeping Early Humans Cool and