How The Earth Changed History

Season 1 Episode 1

Beneath the Crust

Aired Sunday 8:00 PM Jun 20, 2010 on National Geographic
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Episode Summary

The first episode explores the relationship between the deep Earth and the development of human civilization, visiting an extraordinary crystal cave in Mexico, dropping down a hole in the Iranian desert and crawling through thousand year old tunnels in Israel. Discover how our ancestors were strangely drawn to fault lines; areas which connect the surface with the deep interior of the planet.moreless

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