For animals that have been dead millions of years, dinosaurs are extraordinarily pervasive in our everyday lives. Appearing in ads, books, movies, museums, television, toy stores, and novels, they continually fascinate both adults and children. How did they move from natural extinction to pop culture resurrection? What is the source of their powerful appeal? Until now, no one has addressed this question in a comprehensive way. In this exploration of the animal's place in our lives, W. J. T. Mitchell shows why we are so attached to the myth and the reality of the "terrible lizards.". Drawing a distinction between Dinosauria, a scientific grouping of extinct land animals, and dinosaurs, the cultural icons, Mitchell traces the family tree of the latter. What he discovers is a creature of striking flexibility, linked to dragons and mammoths, skyscrapers and steam engines, cowboys and Indians. In the vast territory between the cunning predators of Jurassic Park and the mawkishly sweet Barney, from political leviathans to corporate icons, from paleontology to Barnum and Bailey, Mitchell finds a cultural symbol whose plurality of meaning and often contradictory nature is emblematic of modern society itself.