In a documentary about Darwin's theory of evolution, it said that Darwin had the view that humans evolved from apes millions of years. I find that strange because apes still exist today. Why did some apes (millions of years ago) change and changed drastically to become entities like us and some have not change at all? Or are the apes today evolved from more primitive entities millions of years ago? So in a few millions years of time the descendents of today's apes will become humans like us today (provided that the environment has not drastically changed)? And the descendents of today's humans will have evolved into another speices which is much more superior than humans today?