"This may be the only chance earth people have to explore the Underground Kingdom," you say, "and I don't want to pass it up."

"I'm glad to hear you say that" Dr. Vivaldi unfolds a map of the Underground Kingdom. "I made this map from what the Rakas and Arch- pods have told me. Although the Underground Kingdom has an area sixty percent as large as the surface of the earth, only a very small portion is cool enough to be habitable. Most of the land is too hot to set foot on. It is the molten red rock, you know, that provides the reddish glow that lights this dim world. If it were not for the tremen- dous cooling effect of the Black Sun, life could not exist here."

Sometimes Dr. Vivaldi gets too scientific for you. "Where do you think we should explore?" you ask.

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