8/8 Why is Earth a living planet when Mars is a deep freeze and Venus an inferno?
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7/8 Aubrey Manning travels to Canada and Africa to illustrate geology's impact on evolution.
6/8 Aubrey Manning traces the history of the Ice Age.
5/8 Aubrey Manning looks at an extraordinary theory about how mountains rise and fall.
4/8 Aubrey Manning explores how volcanic activity has reshaped the surface of the planet.
3/8 Aubrey Manning investigates how water levels on Earth have changed over billions of years.
2/8 A submarine dive to the world's longest mountain range, a mile underwater.
1/8 Aubrey Manning finds out what our planet looked like when it was newly formed.