There are lots of theories. We will never know 100% for sure. If you really believe Evolution is BS, what is your theory of how we got here? Do you believe in a creator/god putting us here made out of clay? of Aliens manipulating the genes of monkeys to make a worker class to serve them? Of aliens breeding with proto-humans, of spontaneous humans just showed up here one day, of aliens surviving a galactic war and settling here? What is your theory? That way someone can say your theory is BS like how you say Evolution is BS.