>>13920265Humans have lighter skin to better absorb vitamin d in areas where there's less direct sunlight, specifically northern regions like Europe and Canada where it's also rather cold.
It used to be that blacks in northern regions would consistently develop vitamin d deficiencies, leading to illnesses such as rickets.
In modern times, a lot of foodstuffs like milk are supplemented with vitamin d to avoid this issue.
>>13920279pretty much
