Prehistoric America   Prehistoric : Discovery Channel Prehistoric travels back in time to reveal the amazing extinct creatures that once called our cities home. While many people know that ferocious dinosaurs and large mammals once roamed America, very few realize that these creatures stalked the exact sites where we’ve built our major cities and most famous landmarks. We are literally walking in the footsteps of these extinct animals every day, without even realizing it. Navigation ABOUT THE SHOW ANCIENT NYC GUIDE PREHISTORIC  VIDEO BACK TO THE PAST QUIZ TIME TRAVEL PUZZLES BEASTS IN THE STREETS Ticker Watch New Prehistoric Video: Dallas, LA and DC millions of years ago! See Web Exclusive Video of Prehistoric Denver! Features BACK IN TIME TRAVEL GUIDE See where New York City's ancient ancestors hung out. BEASTS IN THE STREETS See what happens when our Time Machine links past and present. THE BILLION YEAR  HISTORY QUIZ You may know your way around Midtown, but do you know your DEEP TIME? WATCH ANCIENT  CREATURE VIDEO More dinos, giant mammals and all the other residents of ancient America.   Print Yahoo! Buzz Facebook StumbleUpon Digg del.icio.us MySpace MORE NATURE FEATURES WHAT'S HOT DINOSAUR MUMMY: Explore the find DINO VIEWER: 360 views and more. DINO NEWS: Get the latest. MASS EXTINCTIONS: Dinos had lots of company. T REX TIMELINE: Bringing it to life. DINO VIDEO: Watch more Discovery.     TOP FEATURE DINOSAUR CENTRAL Everything Dinosaur from A to Z, games and video and lots of info too.     HOWSTUFFWORKS.COM ON DINOSAURS How Dinosaurs Work Get a really good look at how they're put together. Dinosaur Extinction Learn about all the different ways scientists try to answer the big question . Types of Dinosaurs Find out how to create a dinosaur family tree.

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