There's a difference in macro evolution and micro evolution. Now, don't quote me on this, but one happens and ones not proven; not sure which ones which. I think macro is the one that happens, and that's the one where an animal would grow a thicker coat of fur in a colder climate, or maybe it's legs would grow longer because it's food is higher up. This isn't an instantaneous thing either, it would take generations. And this is in simpleton terms, also.

Now, the other one, again, I think it's micro, is the one where they can't prove it, you know, the fish that turns into a horse type evolution, or the sludge to human thing. They haven't found those missing links. Drat!

My apologies if I've gotten this wrong or mixed up, whatever. I'm not a brainiac.