Had the earth been a little smaller, the sun a little hotter, the orbits wider or narrower, life would not be possible. This sequence of events that made this planet suitable are improbable; we are survivors of vast mischance. -All of a sudden, we were here. This rings true: our existence like the unraveling of a mad party favor. We are here; how strange, terrifying, and wonderful. And now what do we do?