1: History of the Earth How Did The Earth Form?

2: History of the Earth What Was Earth Like 4 Billion Years Ago?

3: History of the Earth The Mystery of the Late Heavy Bombardment

4: History of the Earth Where Did Earth's Water Come From?

5: History of the Earth How Did Life Begin?

6: History of the Earth What Was The Last Common Ancestor of all Life on Earth?

7: History of the Earth Were Volcanoes The Key To Life?

8: History of the Earth Did Life on Earth Come From Space?

9: History of the Earth What Would The Earth Have Been Like Without Life?

10: History of the Earth What is the Oldest Fossil on Earth?

11: History of the Earth How The Earth Got Its Magnetic Field (And Why It Might Not Protect Us Much Longer)

12: History of the Earth What Was Earth Like 3 Billion Years Ago?

13: History of the Earth How Bad Was The Great Oxidation Event?

14: History of the Earth How Did Life Recover From The First Mass Extinction?

15: History of the Earth What Would The Earth Be Like Without Photosynthesis?

16: History of the Earth What Was The First Virus?

17: History of the Earth What Is The Other 99.99% Of Life?

18: History of the Earth What Was The Earth Like 2 Billion Years Ago?

19: History of the Earth A Tour of Earth's Ancient Supercontinents

20: History of the Earth A Tour of Earth's Ancient Superoceans

21: History of the Earth What Was The "Boring Billion" Really Like?

22: History of the Earth What Was The First Complex Life on Earth?

23: History of the Earth What Was The Earth Like 1 Billion Years Ago?

24: History of the Earth What Was The First Fungus?

25: History of the Earth Why Did The Earth Totally Freeze For 100 Million Years?

26: History of the Earth Were These The First Animals?

27: History of the Earth How Far Back In Time Could You Have Survived On Earth?