Great. I have been in biology too. I beg to differ that said communities do not make such claims. It is called "atheism".
Maybe you are too old to see cearly.
*Sarcasm*
The Theory of Evolution concerns itself with the formation of species form existing life. Before life existed, the Theory of Evolution is silent, since there was nothing to evolve. You can find this in any Biology Book not published by a Creationist Press. Try it, you might just learn something.