Season 1

1How Did The Earth Form?

09 May 2020 · 18 min

An overview of fractionation, Mara's survival, 'Grand Tack' theory, formation of Mercury, solidifying Earth, and theories surrounding Theia.

2What Was Earth Like 4 Billion Years Ago?

23 May 2020 · 22 min

3The Mystery of the Late Heavy Bombardment

07 Jun 2020 · 20 min

4Where Did Earth's Water Come From?

14 Jun 2020 · 32 min

5How Did Life Begin?

04 Jul 2020 · 22 min

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

11 Jul 2020 · 24 min

7Were Volcanoes The Key To Life?

18 Jul 2020 · 21 min

8Did Life on Earth Come From Space?

08 Aug 2020 · 17 min

9What Would The Earth Have Been Like Without Life?

02 Sep 2020 · 21 min

10What is the Oldest Fossil on Earth?

25 Sep 2020 · 31 min

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

11 Oct 2020 · 23 min

12What Was Earth Like 3 Billion Years Ago?

22 Nov 2020 · 27 min

13How Bad Was The Great Oxidation Event?

20 Dec 2020 · 27 min

14How Did Life Recover From The First Mass Extinction?

06 Jan 2021 · 28 min

15What Would The Earth Be Like Without Photosynthesis?

31 Jan 2021 · 35 min

World Without Photosynthesis

16What Was The First Virus?

24 Feb 2021 · 27 min

Older Than Life? Evolution of Viruses

17What Is The Other 99.99% Of Life?

08 Apr 2021 · 32 min

4 Billion Years of Life: Tour of the Biosphere

18What Was The Earth Like 2 Billion Years Ago?

16 May 2021 · 32 min

2 Billion Years Ago: After The Great Flood

19A Tour of Earth's Ancient Supercontinents

26 Jun 2021 · 49 min

Before Pangaea

20A Tour of Earth's Ancient Superoceans

31 Jul 2021 · 43 min

Exploring Earth's Prehistoric All Sea

21What Was The "Boring Billion" Really Like?

17 Oct 2021 · 36 min

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

22What Was The First Complex Life on Earth?

30 Nov 2021 · 1 hr 0 min

Earth's Impossible Fossils

23What Was The Earth Like 1 Billion Years Ago?

18 Feb 2022 · 43 min

One Billion Years Ago: Is This Eden?

24What Was The First Fungus?

30 May 2022 · 1 hr 2 min

The Key to Life? Evolution of Fungi

25Why Did The Earth Totally Freeze For 100 Million Years?

31 Aug 2022 · 49 min

Snowball Earth

26Were These The First Animals?

14 Dec 2022 · 54 min

The Ediacaran: Life's Failed Experiment?

27How Far Back In Time Could You Have Survived On Earth?finale

09 Jun 2023 · 57 min

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