How to Date a Rock
Episodes: 1, 3, 4, 10, 24, 25, 30
The Origins of the Earth
Episodes: 4, 5, 6, 7
The Sun
Episodes: 4, 5, 28, 29
The Mantle and Core
Episodes: 6, 7, 12, 13, 26, 27, 31
The Moon
Episodes: 8, 9, 34, 35
Plate Tectonics
Episodes: 11, 12, 13, 26, 27, 31
Oceans
Episodes: 14, 15, 22, 32
The Origins of Life
Episodes: 16, 17, 18, 19, 20, 21, 22, 23
Possible Fossils
Episodes: 16, 33
Atmosphere and Climate
Episodes: 20, 28, 29
