Black Girl With A Purple Scarf Posing On The Terrace

The texture of hair in people of Sub-Saharan African ancestry is noticeably different from that of Eurasian populations, as was already noted by Herodotus, who described the peoples of Libya (the "western Ethiopians") as wooly-haired.
Such "afro-hair" texture is denser than its straight counterparts. Due to this, it is often referred to as 'thick', 'bushy', or 'woolly'. For several reasons, possibly including its relatively flat cross section (among other factors), this hair type conveys a dry or matte appearance. It is also very coarse, and its unique shape renders it very prone to breakage when combed or brushed.
The specific characteristics of the natural afro-hair form are unique among all mammals. The texture likely predates the evolution of dark skin. It evolved when, as pre-human Australopithecines lost most of their fur to enable perspiration, the need to protect the newly exposed pale skin underneath this body hair was crucial (in light of Rogers et al., 2004 and Harding et al., 2000). The trait ceased to be essential to survival at the equator upon the evolution of hairless dark skin. Yet it has continued to be expressed vestigially among most Melanesians, Andaman Islanders, and sub-Saharan Africans.