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THE CITY Our story begins in a city, with buildings and streets and bridges and parks. Humans were strolling, automobiles were driving, airships were flying, robots were hard at work. Weaving through the city streets was a delivery truck. The truck knew where to go, and how to get there, all by itself. It pulled up to a construction site and automatically unloaded some crates. A few more turns and it unloaded more crates down at the docks. The truck zigged and zagged across the city, delivering crates as it went, and then it merged onto a highway. Cars and buses and trucks were cruising along the highway together. But as the delivery truck continued, the traffic became lighter, the buildings became smaller, and the landscape became greener. With nothing but open road ahead, the truck accelerated to its top speed. The landscape outside was now just a green blur, occasionally broken by a flicker of gray as a town flew past. On and on the delivery truck went, racing over long bridges, shooting through mountain tunnels, gliding down straight stretches of highway, until it started to slow. It drifted from the fast lane to the exit lane, and then it rolled down a ramp and into farm country. Clouds of dust billowed up behind the truck as it drove past fields and fences. In the hazy distance, enormous barns loomed above the plains. The air was thick with the smells of soil and livestock. Robot crews methodically worked the crops and fed the animals and operated the massive farm machines. A hill gradually climbed into view. The hill was crowned with
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