Flying Cars, Zombie Dogs, and Robot Overlords: How World's Fairs and Trade Expos Changed the World

Every time you plug your phone into a wall socket, flick on a TV, withdraw money from an ATM, lick an ice-cream cone, switch on a computer, ride an escalator, play a DVR, watch a movie about dinosaurs, or pop a tranquilizer, you’re doing something that originated at a world’s fair or trade expo. And yet, it's a world invisible to most. In fact, each new technology and every novel product that rocked America and rolled the world, from the Colt revolver and the Corvette to fax machines and fl...