“They want us to think it’s all down there,” he said with disdain in his voice. “What?” I asked. “The crust. The mantle. The molten core. All of it.” “Oh! You mean the Earth!” I said, catching up. “You’re talking about what’s down there below the surface and all?” “What they want us to believe is down there, you mean,” he corrected. He kept saying things like that. As though knowledge was some great secret …