Journey to the Earth's Core

Underground Earth to depths of 4000 miles is explored. Included: unusual life forms a mile below the surface; mines the size of cities; and caves. Also: the exploits of adventurers below the Earth's... More

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Journey to the Earth's Core

Airdate: 3/23/11
Humans have mapped every corner of the globe - from jungles and deserts to the depths of space. Yet we've gone only seven miles below the Earth's surface - just one five hundredth of the way to the Core.
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