At the turn of the nineteenth century, geology - and its claims that the earth had a long and colorful prehuman history - was widely dismissed as dangerous nonsense. But just fifty years later, it was the most celebrated of Victorian sciences. Ralph O'Connor tracks the astonishing growth of geology's prestige in Britain, exploring how a new geohistory far more alluring than the standard six days of Creation was assembled and sold to the wider Bible-reading public. Shrewd science writers, O'Connor shows, marketed spectacular visions of past worlds, piquing the public imagination with glimpses of man-eating mammoths, talking dinosaurs, and sea dragons spawned by Satan himself. These authors - including men of science, women, clergymen, biblical literalists, hack writers, blackmailers, and prophets - borrowed freely from the Bible, modern poetry, and the urban entertainment industry, creating new forms of literature in order to transport their readers into a vanished and alien past. In exploring the use of poetry and spectacle in the promotion of popular science, O'Connor proves that geology's success owed much to the literary techniques of its authors.