Missouri has been likened to a "cave factory" because its limestone bedrock can be slowly dissolved by groundwater to form caverns, and the state boasts more than six thousand caves in an unbelievable variety of sizes, lengths, and shapes. Dwight Weaver has been fascinated by Missouri's caves since boyhood and now distills a lifetime of exploration and research in a book that will equally fascinate readers of all ages. Missouri Caves in History and...