How Did The Earth Form?

18 min

What Was Earth Like 4 Billion Years Ago?

22 min

The Mystery of the Late Heavy Bombardment

20 min

Where Did Earth's Water Come From?

32 min

How Did Life Begin?

22 min

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

24 min

Were Volcanoes The Key To Life?

21 min

Did Life on Earth Come From Space?

17 min

What Would The Earth Have Been Like Without Life?

21 min

What is the Oldest Fossil on Earth?

31 min

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

23 min

What Was Earth Like 3 Billion Years Ago?

27 min

How Bad Was The Great Oxidation Event?

27 min

How Did Life Recover From The First Mass Extinction?

28 min

What Would The Earth Be Like Without Photosynthesis?

35 min

What Was The First Virus?

27 min

What Is The Other 99.99% Of Life?

32 min

What Was The Earth Like 2 Billion Years Ago?

32 min

A Tour of Earth's Ancient Supercontinents

49 min

What Was The "Boring Billion" Really Like?

36 min

What Was The First Complex Life on Earth?

60 min

What Was The Earth Like 1 Billion Years Ago?

43 min

What Was The First Fungus?

62 min

Why Did The Earth Totally Freeze For 100 Million Years?

49 min

Were These The First Animals?

54 min

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

57 min