200 million years ago the world, Dinosaur Expo.
The World 200 Million Years Ago, Dinosaur Expo
A dinosaur expo held at an amusement park in 1972-1973. (Of course?) I myself did not go to this exhibition.
The descriptions in the guidebook published in 1972 were slightly different from today's perspective. This guidebook states the dinosaur habitation period as "200 million to 80 million years ago," but it is now considered "235 million to 65.5 million years ago."
