Life on Our Planet

Season 1, Episode 4: Chapter 4: In Cold Blood

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After Earth's third mass extinction, mammals' surviving ancestors ruled the supercontinent Pangea. But lizards soon ushered in the age of reptiles.

All Episodes - Season 1

Chapter 1: The Rules of Life
Episode 1
Chapter 1: The Rules of Life
 Chapter 2: The First Frontier
Episode 2
Chapter 2: The First Frontier
 Chapter 3: Invaders of the Land
Episode 3
Chapter 3: Invaders of the Land
 Chapter 4: In Cold Blood
Episode 4
Chapter 4: In Cold Blood
 Chapter 5: In the Shadow of Giants
Episode 5
Chapter 5: In the Shadow of Giants
 Chapter 6: Out of the Ashes
Episode 6
Chapter 6: Out of the Ashes
 Chapter 7: Inheriting the Earth
Episode 7
Chapter 7: Inheriting the Earth
 Chapter 8: Age of Ice and Fire
Episode 8
Chapter 8: Age of Ice and Fire
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