we used to believe that black skin can be caused from dying and direct
exposure to ultraviolet light (UV) radiations, but it can induced skin
cancer according to a recent analysis.
Originally skin cancer reasons were rejected as they are likely to
create pressure about having black skin. This was so because of a belief
rarely fatal at age young sufficient to involve reproduction.
According to a new paper that has been published in the Proceedings of
the Royal Society B, has been providing evidences about black people and
the albinism of parts from Africa with highest exposure degree of UV
Professor Mel Greaves, Director of the Centre for Evolution and Cancer
at The Institute of Cancer Research, London, said:
"Charles Darwin thought variation in skin color was of no adaptive value
and other investigators have dismissed cancer as a selective force in
evolution. But the clinical data on people with albinism, particularly
in Africa, provide a strong argument that lethal cancers may well have
played a major role in early human evolution as an important factor in
the development of skin rich in dark pigmentation - in eumelanin."