Science is a (fact based) method that can be very useful for studying things. It can come up with an explanation why something works, reacts, behaves, .... in a certain way.
It may or may not be correct but it is often the best explanation available. Until something crops up that shows it's that that explanation or theory isn't correct or complete. That is the moment where science has to reexamine the existing theories, set up new experiments to refine the theory or come up with a completely different explanation....
Most advanced in science are not preceded but the words 'eureka I have fount it' but more frequently by the words 'hey, that is strange...'