Making North America Sneak Peek

Preview: Season 42 Episode 20 | 4m 3s

The epic 3 billion-year story of how our continent came to be. From the palm trees that once flourished in Alaska to titanic eruptions that nearly tore the Midwest in two, discover how forces of almost unimaginable power gave birth to North America.

Aired: 08/30/15

Rating: TV-PG

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