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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.
How curly hair boosted brain growth by keeping early humans cool
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Curly hair may have evolved to keep early humans cool, study
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Curly hair may have evolved to keep early humans cool, study
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Climate change may have given ancient human ancestors bigger
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Curly Hair Kept Early Humans Cool
Why curly hair was an evolutionary advantage
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Curly hair allowed early humans to 'stay cool and actually
