It's almost the exactsame size and shape as these other onesthat we can see above ground
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It's almost the exact
same size and shape as these other ones
that we can see above ground
same size and shape as these other ones
that we can see above ground
Full Transcript
00:00:01.000 --> 00:00:03.028
It's almost the exact
same size and shape
00:00:03.036 --> 00:00:06.088
as these other ones
that we can see above ground.
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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...
