That's something I've always wondered about evolution in general. Why isn't there a continuum of species? For example, why are there chimpanzees and humans walking around as discrete species with nothing "in between". Seems unlikely that a few chimpanzees gave birth to human babies (or I guess some ancient human ancestor) one day, and then we just branched off and evolved separately leaving the rest of the chimpanzees behind. Why didn't the "better" DNA get fed back into the chimpanzee gene pool and the whole species evolve?
Obviously I know nothing about biology, but I'd love a high level explanation. It's the one thing that's always bothered me about evolution, because nobody ever explains it, and it seems like magic.
Obviously I know nothing about biology, but I'd love a high level explanation. It's the one thing that's always bothered me about evolution, because nobody ever explains it, and it seems like magic.