“Digger,” I said, “you’re never going to believe it.” “What?” “The Earth is a planet.” “What?” He looked confused. “Mass, are you okay?” “It’s a planet,” I said. “It’s not what we thought it was back home. It’s not this safe cocoon, man. We’re out here spinning in all this chaos. The Earth is a planet. The Earth is a spaceship, and we’re all space travelers.”