Friday, September 21, 2012

[xuiixvxt] Secret underground depth record

What is the greatest distance a human has ventured underground?  (Under earth, not water.)

Unfortunately, underground being a great place to hide things and activities, the answer might be secret.

What about human controlled agents, i.e., robots?  I can imagine an underground storage bunker only accessible by robots.

(The human altitude record is Apollo 13.  The robot record is Voyager 1.)

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