There is no proof that gorillas, humans, chimpanzees and whatever else they say emerged (evolved) from a "Common Ancestor," still unknown, is true. One bone doesn't do the job. Neither do ideas that some humans have lots of hair on their backs, fronts, legs, etc. None whatsoever. Gorillas as of yet remain gorillas and humans stay humans. Now I find it interesting that it was brought out that the "races" of humankind is a misleading concept, since humans are humans no matter what color their skin is or how long their limbs are.