Both drugs had been previously recommended for approval 14-0 by members of FDA's Anti-Infective Drugs Advisory Committee. The significance of two new antibiotics in four weeks? We've recently been averaging one antibiotic every three years.
More melanin presence in the skin makes the skin appear black, and less melanin will make the skin appear less black. White people have very little melanin synthesized by their skin. So, the color of the races is because of some difference in the quanitity of the melanin pigment in our body. That is all.
There are three types of melanin, the first two of which have been identified in fossils: 1  Eumelanin is the best-known form of melanin, providing primarily black colours. 2  Eumelanin is found in the hair and skin of humans, and it colours the hair grey, black, yellow, and brown.