3. Mastodon excavation in Angola, Louisiana.

4. Cast

5. Fossil Fish Imprint

6. Trace Fossils: Dinosaur Tracks

7. HYRACODON

8. Sabertooth Cat

9. Sabertooth Cat with Tar Pit Finish

10. Termite and Tree Leaf in Amber

11. Spider and Feather in amber.

15. Precambrian Era

17. Mawsonites, similar to jellyfish, Australia Smithsonian Institution, Museum of Natural History

18. Unnamed "spindle-shaped organism" from Newfoundland Smithsonian Institution, Museum of Natural History

19. Trilobites thrived worldwide from the Cambrian period (600 m.y.a.) through the Permian (230 m.y.a.).

20. Paleozoic Era

21. Ammonites are spiral-shaped marine cephalopods that lived through the Paleozoic and Mesozoic eras (65 - 600 m.y.a.) and became extinct with the dinosaurs.

22. Mesozoic Era

23. Armored dinosaur Stegosaurus, a plant-eater of the late Jurassic Period, about 135 million years ago.Stegosaurus,

25. Cenozoic Era

26. The Age of the Mammals