>>However it's also under selection in places like the Ethiopian highlands, where sun exposure is presumably not an issue. The Ethiopian highlands have been hi

>>However it's also under selection in places like the Ethiopian highlands, where sun exposure is presumably not an issue. The Ethiopian highlands have been historically productive in agriculture. Agricultural diets contain less Vitamin D, increasing the selective pressure for lighter skin tones. The highlands are also cooler than other regions of Africa at similar latitudes, resulting in more clothing being required on average. More clothing necessitates more UVB absorption per unit of skin exposed, which would further select for lighten skin tones.