This doesn’t make sense to me, if you could please explain this to me next time but I need the answer. I’ll give you brainliest answer and thanks.

Yes he thought they should be left to chance why, because he thought that was the best thing to do

It might. it might because if you think about if they discovered if we came from (lets say something funny like aliens) and thy found cells that matched and they would have t do more research about it but would most probably change their theory.