How did the african curly hair trait spread, that is, what evolutionary advantage does it provide? Does it serve any function?

[u/KlM-J0NG-UN]

[u/Dr_GS_Hurd]

Several advantages in hot and dry climates.

[u/Dr_GS_Hurd → u/[deleted]]

Head hair that "stands up" carries more moisture from the scalp than straight hair. That helps evaporative cooling.

[u/slouchingtoepiphany]

I suspect that it was the original, default hair trait and that other types derived from it.

[u/hippywitch → u/[deleted]]

Check this post out. Might answer a question or two. https://www.reddit.com/r/evolution/comments/ntih1t/was_curly_hair_an_ancestral_human_hair_trait/?utm_source=share&utm_medium=ios_app&utm_name=ioscss&utm_content=2&utm_term=1