The Age of Gigantism
- Episode aired Mar 11, 2007
- TV-G
- 45m
220 million years ago, Dinosaurs and Mammals begin their 150 million year battle for dominance.220 million years ago, Dinosaurs and Mammals begin their 150 million year battle for dominance.220 million years ago, Dinosaurs and Mammals begin their 150 million year battle for dominance.