Seriously, why are you here?
The wisest man of all time, though, Socrates, once said "the only thing I really know is that I know nothing." (Not an exact quote, but you get the gist.)
Scientific theories change, come and go. It takes quite a bit of wisdom and intelligence to come to the realization that most of what we take for granted as being true will one day be rejected and replaced by scientists of the future. Knowing that, it creates a sense of humility and wonderment about the world around us.