“In the land where caribou now roam, there once lived strange and amazing creatures…” Discover Alaska's dinosaurs when you travel back through prehistoric time in Thunderfeet. Take a trip through 70 million years of history from the day of the dinosaurs to the migration of North America's animals across the Bering Land Bridge. Ages 5 and up. Includes a glossary for curious kids with more information about dinosaurs and other prehistoric critters. Thunderfeet is dedicated to all of Alaska’s animals. We hope the Last Frontier will stay a wild place.