Creationists regularly dismiss evolution by pointing out it’s only a theory, suggesting it hasn’t been proven. The “theory,” however, has to do with questions about how evolution happens, not if it happens. We can watch it happen in a Petri dish in just a few hours, or look to physiological adaptations in some species that are occurring right now. Saying evolution doesn’t happen because it’s only a theory is like saying music doesn’t happen because we teach music theory.