Who lived with the dinosaurs & did they go extinct too?

In this segment, Fred (the Stegosaurus) and Adele read about the fossil evidence of other animals that lived along side the dinosaurs, and about extinction.

Try this game from the American Museum of Natural History about the animals that are in danger of extinction today.

Read more about what scientists have learned from studying the impact crater from the asteroid that triggered the extinction of the land dinosaurs from Smithsonian.