What Was The Earth Like 1 Billion Years Ago? 1 Season 23 Episode

Episode #1

How Did The Earth Form?

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?

Episode #16

What Was The First Virus?

Episode #17

What Is The Other 99.99% Of Life?

Episode #18

What Was The Earth Like 2 Billion Years Ago?

Episode #19

A Tour of Earth's Ancient Supercontinents

Episode #20

A Tour of Earth's Ancient Superoceans

Episode #21

What Was The "Boring Billion" Really Like?

Episode #22

What Was The First Complex Life on Earth?

Episode #23

What Was The Earth Like 1 Billion Years Ago?

Episode #24

What Was The First Fungus?

Episode #25

Why Did The Earth Totally Freeze For 100 Million Years?

Episode #26

Were These The First Animals?

Episode #27

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