Life on Our Planet

E1. Chapter 1: The Rules of Life

Evolution. Competition. Mass extinction. Three fundamental rules have driven the rise and fall of life on Earth for over four billion years.

★ 8.0

E2. Chapter 2: The First Frontier

For billions of years, land on Earth was uninhabitable. But in the seas, predation allowed species to thrive before — and after — two mass extinctions.

★ 8.2

E3. Chapter 3: Invaders of the Land

Sprawling moss, towering trees, flying insects, limbed amphibians: Early species vied for domination as the land went from hostile to hospitable.

★ 8.4

E4. Chapter 4: In Cold Blood

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

★ 8.0

E5. Chapter 5: In the Shadow of Giants

The formation of continents with varied environments allowed for an explosion of biodiversity — and turbo-charged the evolution of mighty dinosaurs.

★ 7.8

E6. Chapter 6: Out of the Ashes

The dinosaurs met their end with a cataclysmic asteroid impact. Rising from the ashes, birds reinvented themselves into a dynasty 10,000 species strong.

★ 8.2