Why are Africans so dark?

Melanin can prevent ultraviolet rays, because Africa has a hot climate and strong ultraviolet rays. In the long-term evolution process, people who have genes that can synthesize pigments in large quantities survive, others are eliminated, and finally only people who have this gene are left. So Africans all have these genes, and they have synthesized a lot of melanin when they are developing in their mothers.

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Africans refer to African residents. Because people in sub-Saharan Africa are mostly black, Africans often refer to black people. Black people in Africa are divided into many different types. The most common are the blacks in Sudan and the Bantu blacks. In addition, there are black and white Ethiopians and black and yellow Malagasy. The oldest races in the world-Ni grillo and Khoisan.