Gone forever!

Discusses the ankylosaurus dinosaur, including its known physical characteristics, behavior, habitat, and what other creatures were its contemporaries, as well as how scientists study fossils and evaluate geological features to learn about extinct organisms.

Describes what has been learned about the physical features, behavior, and surroundings of the long-extinct trachodon.

Describes the physical characteristics of Tyrannosaurus rex, probably one of the very last dinosaurs on Earth, and discusses where it lived.

Describes what scientists have learned from fossils about the sabretooth, a prehistoric animal, including its habitat, food, and appearance.