1Chapter 1. Clocky: Before and After
9Chapter 9. The Dance of the Continents
2Chapter 2. Tiktaalik: The Walking Fish
10Chapter 10. The Dinosaur Olympics
3Chapter 3. Acanthostega: Four Legs
11Chapter 11. Mammals: Nocturnal Hunters
4Chapter 4. Amphibians: Life on Land
12Chapter 12. The End of the Reign of Giants
5Chapter 5. Reptiles: The Secret in the Egg
13Chapter 13. The Age of Mammals: A New World
