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On a frigid night like tonight, any tunnel or passageway
behind these walls will register on the colder side
behind these walls will register on the colder side
Full Transcript
00:00:01.000 --> 00:00:02.006
On a frigid night like tonight,
00:00:02.068 --> 00:00:05.002
any tunnel or passageway
behind these walls
00:00:05.028 --> 00:00:07.036
will register on the colder side.
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Movie Summary
Using cutting-edge technologies such as ground penetrating radar (GPR), LIDAR (Light Detection and Ranging), and 3-D imaging, scientists research fascinating underworlds of secret tunnel networks, ancient structures, and bizarre g...