"We are going through our daily lives, understanding almost nothing in the world. We give little thought to the machinery that generates the sunlight, that makes life possible. Tho the gravity, that glues us to an earth, because otherwise we’d be send spinning off into space. Or to the atoms of which we are made, and all of our stability, on what we fundamentally depend. Few of us spend much time wondering why nature is the way it is; where the cosmos came from, or whether it was always here; if time will one day flow backward and effects precede causes; or whether there are ultimate limits to what humans can know. What is the smallest piece of matter. Why do we remember the past and not the future. And why there is a universe.” – Carl Sagan"