The Tunnelers

 

How deep into the Earth have humans traveled? How far have we drilled? In this episode of Stuff to Blow Your Mind, Robert Lamb and Joe McCormick explore some interesting lows from the history of mining, geologic exploration and good old fashioned subterranean living. 

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Stuff To Blow Your Mind

Deep in the back of your mind, you’ve always had the feeling that there’s something strange about re… 

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