“Well, if you did, you’d be wrong. It is much, much smaller. Try this: Imagine you’re still holding that tiny grain of sand. Now not just the beach you are on, but all the beaches all over the planet, all of them, all down the coast of California and the East Coast from Maine down to Florida and on the Indian Ocean and off the coasts of Africa. Imagine all that sand, all those beaches everywhere in the world and now look at that grain of sand you’re holding and still, still, our entire solar system—forget our planet—is smaller than that compared to the rest of the universe. Can you even comprehend how insignifi- cant we are?”