Eons

Season 3, Episode 22

Episode Title: How Volcanoes Froze the Earth (Twice)

Air Date: 2019-07-17

Overview:

Over 600 million years ago, sheets of ice coated our planet on both land and sea. How did this happen? And most importantly for us, why did the planet eventually thaw again? The evidence for Snowball Earth is written on every continent today.