"Physics deals with concepts of mechanics, heat and light, electricity, and magnetism! These kinds of things will drive you crazy if you think about them too much!
Let's face it ... if you're content to gaze up at the night sky, secure in the knowledge that you won't fall off the earth and that none of the stars above will land on your head, then how much more do you really need to know?"
Consider a serious top-10 list of what an editor for the journal Science News thinks everyone should know about science.