Journey to the Earth's Core

Genre: Documentary, Science

Summary

Mysterious underground forces -- stretching to some 4,000 miles to the heart of Earth -- impact the existence of those on the surface.

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No Episode Title (First Aired: Mar. 23, 2011) Mysterious underground forces -- stretching to some 4,000 miles to the heart of Earth -- impact the existence of those on the surface. Thu 6/6 8:00PM-10:00PM History 2