Straight Hair

Evolution Of Hair - Evolution - Texture - Straight Hair
... evidence with regard to the evolution of straight hair texture seems to support Jablonski's suggestions that the need for vitamin D triggered the transition from dark to pale, translucent skin among modern ... more deeply pigmented skinned) Northern-migrants with mutations for straighter hair survived and had children at (somewhat) higher rates ... This argument is made based on the principle that straight fibers better facilitate the passage of UV light into the body relative to curly hair ...

Evolution Of Hair - Evolution - Texture - Curly Hair
... advantageous for pre-humans to retain the hair on their heads in order to protect the scalp as they walked upright in the intense African (equatorial) UV light ... the planet (and which also is very vulnerable at birth), was arguably a more urgent issue (axillary hair in the underarms and groin were also retained as signs ... to the naked skin expressed by Homo sapiens, hair texture putatively changed gradually from straight hair (the condition of most mammals, including humanity's closest ...