Black Girl With A Purple Scarf Posing On The Terrace

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.
Sub-Saharan Africa
Sub-Saharan Africa is a common, if imprecise term that encompasses African countries located south of the Sahara Desert. It is commonly used to differentiate the region culturally, ecologically, politically and, more controversially, racially, from North Africa, which has historically been part of the Mediterranean sphere. Because the indigenous people of this region are primarily dark-skinned, it is alternatively called "Black Africa". Some criticize the use of the term, because, having become in many quarters synonymous with Black Africa, it can leave the mistaken impression that there are not indigenous Black populations in North Africa. Furthermore, the Sahara cuts across countries such as Mauritania, Mali, Niger, Chad, and Sudan, leaving some parts of them in North Africa and some in sub-Saharan Africa.