History of the Earth

Episode 2

What Was Earth Like 4 Billion Years Ago?

Episode 3

The Mystery of the Late Heavy Bombardment

Episode 4

Where Did Earth's Water Come From?

Episode 5

How Did Life Begin?

Episode 6

What Was The Last Common Ancestor of all Life on Earth?

Episode 7

Were Volcanoes The Key To Life?

Episode 8

Did Life on Earth Come From Space?

Episode 9

What Would The Earth Have Been Like Without Life?

Episode 10

What is the Oldest Fossil on Earth?

Episode 11

How The Earth Got Its Magnetic Field (And Why It Might Not Protect Us Much Longer)

Episode 12

What Was Earth Like 3 Billion Years Ago?

Episode 13

How Bad Was The Great Oxidation Event?

Episode 14

How Did Life Recover From The First Mass Extinction?

Episode 15

What Would The Earth Be Like Without Photosynthesis?

World Without Photosynthesis

Episode 16

What Was The First Virus?

Older Than Life? Evolution of Viruses

Episode 17

What Is The Other 99.99% Of Life?

4 Billion Years of Life: Tour of the Biosphere

Episode 18

What Was The Earth Like 2 Billion Years Ago?

2 Billion Years Ago: After The Great Flood

Episode 19

A Tour of Earth's Ancient Supercontinents

Before Pangaea

Episode 20

A Tour of Earth's Ancient Superoceans

Exploring Earth's Prehistoric All Sea

Episode 21

What Was The "Boring Billion" Really Like?

1.8 to 0.8 Billion Years Ago: Earth's Lost Billion Years

Episode 22

What Was The First Complex Life on Earth?

Earth's Impossible Fossils

Episode 23

What Was The Earth Like 1 Billion Years Ago?

One Billion Years Ago: Is This Eden?

Episode 24

What Was The First Fungus?

The Key to Life? Evolution of Fungi

Episode 25

Why Did The Earth Totally Freeze For 100 Million Years?

Snowball Earth

Episode 26

Were These The First Animals?

The Ediacaran: Life's Failed Experiment?

Episode 27

How Far Back In Time Could You Have Survived On Earth?

How Far Back In Time Could You Have Survived On Earth?