"There's no chance of that," Professor Bruckner's assistant tells you. "An aerial photo- graph taken a few weeks ago showed that the glacier has moved, sealing the crevasse with 6,000 feet of solid ice."
You hang up the phone and stand by the win- dow, thinking about the world that lies beneath the earth's surface. What is it like? What creatures might live there? What happened to Professor Bruckner? Did he find Larsen and Sneed? Is Dr. Vivaldi still alive? Now, of course, you'll never know.