“Right now there's a commonly-held view among scientists that we know about only four percent of all the matter in the universe. Four percent!""So what about the other 96 percent?""We astrophysicists call it 'dark matter' and 'dark energy.' Maybe we should just call it ignorance. There's so much that we don't know. It's shocking how little we know. And yet we behave like little gods who think we're in control of everything. Like kids with delusions of grandeur. Isn't that what we've made ourselves into? It's as if we're trying to make ourselves believe that four percent is all there is. That everything else, all that we don't know, doesn't exist. But it does. We know it's there; we just don't understand it.”