S17·E7 Secret Underground
Core
Aired December 10, 2010 44 min
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Synopsis
Just below the surface, there's a whole different America hidden from public view. Take a revealing look at the America under our feet, from secret military installations, and experimental farms to tunnel networks and neutron lasers.
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Frequently Asked Questions
When did Season 17 Episode 7 of Modern Marvels air?
Season 17, Episode 7 ('Secret Underground') originally aired on December 10, 2010.
How long is Season 17 Episode 7 ('Secret Underground')?
The runtime for this episode is approximately 44 minutes.
What happens in Modern Marvels Season 17 Episode 7?
Just below the surface, there's a whole different America hidden from public view. Take a revealing look at the America under our feet, from secret military installations, and experimental farms to tunnel networks and neutron lasers....
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