It's the same way with particule physics there are still a lot of unknowns. We have alot of theories but we don't know enough to really explain all we see. Think how far we have came in particule physics. First they though protons and neutrons we're the smallest. Then they said the same thing about quarks then discovered other particules that made up quarks. Personally I like that ever time society this is they have figured the world or universe out we find we are just starting. That mystery amazes me. I did some study on black holes and while we know some aspects of the behavior they display we don't know it all yet.