The article Human skin pigmentation as an adaptation to UV radiation mentions that humans have different skin colour based on the region where they live or their ancestors lived because the traits are passed from generation To explain further people who lived near to the equator region where the ultraviolet radiation is higher have darkly pigmented skin and people in the Northern zones usually have light pigmented skin colour This was necessary because in the northern zones people need to absorb more UV for Vitamin D production whereas people in the equatorial zones need to reflect some of the UV radiation since this region is rich on UV so as to inhibit folate damage Jablonski N Nina G 2000 Moreover they suggest that people who have less body hair tend to have darkly pigmented skin because they need to lose body heat when exposed to hot environmental conditions and skin get caught directly by the sun Cooling by evaporation of eccrine sweat is impeded by thick body hair Also there are some problems involved with the migrants For instance when people who have darkly pigmented skin from equatorial zones move to latitudinal zones like
