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S1, E1: Humans have mapped every corner of the globe--from jungles and deserts, to outer space. Yet we've gone only 7 miles below the Earth's surface. Go deeper into the heart of our planet: 4,000 miles down.

Documentary · Mar 23, 2011 · 1 hr 28 min

Information

Released
2011
Run Time
1 hr 28 min
Rated
TV-PG

Languages

Audio and Subtitles
English (United States) (AAC, CC)

Accessibility

Closed captions (CC) refer to subtitles in the available language with the addition of relevant non-dialogue information.