The Mammoth Cave dating guide (not how to get a date with a Mammoth Cave guide) -- Rockphobia: rockfall, earthquakes, and caves -- Bones: what's left of exciting but dead animals in Mammoth Cave -- Secret lives of cave critters revealed! -- The gypsum twinkie connection: and other uses of cave minerals -- Prairie park companion: Mammoth Cave National Park's prairie restoration -- Prehistoric cavers -- Saltpeter: an explosive subject -- The cave cure: old and new ideas on the healing powers of caves -- Exploring the world's longest cave -- The cave wars -- Want a 2:00 a.m. cave tour? Come to great onyx! -- Cave Guide Coy Hanson: electric lights, the Mammoth Cave Railroad, and other stuff -- Lost John: the discovery of a mummy -- CCC Boy Fred k. Hanie Jr -- Ronald Reagan's visit to Mammoth Cave -- Rachel Wilson, a woman in the underground world of men -- Nuclear-fallout shelters in Mammoth Cave -- The literary mammoth -- Celebrities underground -- Colossal cave adventure: cave meets computer -- Cave jokes: the lowest form of humor.