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

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.

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

Big freeze drove early humans out of Europe - BBC News

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

Why curly hair was an evolutionary advantage

BBC Learning English - 6 Minute English / The wonders of hair

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