Caverns, Cauldrons, and Concealed Creatures: A Study of Subterranean Mysteries in History, Folklore, and Myth

Caverns, Cauldrons, and Concealed Creatures: A Study of Subterranean Mysteries in History, Folklore, and Myth - William Michael Mott This is an extremely interesting book with an interesting and scarey hypothesis that makes more sense to me than the usual "guesses" and "explanations". The answer might just be beneath our feet instead of amongst the stars.