In America in the closing decades of the century there arose a rivalry even more spectacularly venomous, if not quite as destructive. It was between two strange and ruthless men, Edward Drinker Cope and Othniel Charles Marsh. They had much in common. Both were spoiled, driven, self-centered, quarrelsome, jealous, mistrustful, and ever unhappy. Between them they changed the world of paleontology.
