just because a new species evolved, doesn't mean the species it evolved from disappeared, extinction only happens when a species cant survive any longer due to supply shortage and climate change. chimps, gorillas, orangutans and gibbons are fine in the jungle, the theory of our evolution is a chimp human common ancestor species was forced out of the jungle in search for food, and according to biology the need to survive will spark evolution (passing genes down that make the offspring slightly better suitable for a certain lifestyle, changes to species in different parts of the earth will cause species to branch off to many different species and in our case, complex hunting branched us off from other apes as did living in the Savannah, ocean interaction which causes hair loss and upright evolution, being were not built for hunting like wolves or lions, but we had hands and medium sized brains.) and sometimes extinction, i'm not trying to dis Christianity or anything, but even a christian can agree not all of the bible is true, and we evolved from apes, look at our bone structure, skulls, behavior, DNA etc., its all pretty similar.

your pretty dumb, modern day whites, africans, asians etc. share a common ancestor with neandertals, and the common ancestor is white, its name is homo heidlbergensis. theres more than one human spieces, incase you didnt know.