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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.
BBC Learning English - 6 Minute English
Curly hair kept early humans cool and made our brains bigger
Why curly hair was an evolutionary advantage
Curly hair allowed early humans to 'stay cool and actually conserve
Why human brains were bigger 3,000 years ago
Curly Hair May Have Been Key to Human Brains Growing So Big
The Voice Newspaper - December 2023 by thevoicemediagroup - Issuu
Curly Hair Keeps the Head Coolest, Smart News
How curly hair evolved to protect brain from overheating & help