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Is just a small fraction Of that
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Secrets of the Underground

Is just a small fractionOf that, It would beAn existential threat

Is just a small fraction
Of that, It would be
An existential threat

Full Transcript

00:00:01.000 --> 00:00:03.599
Is just a small fraction Of that,
00:00:03.006 --> 00:00:05.369
It would be An existential threat.
Duration
5 seconds
Views
21
Timestamp in Movie
00:16:57
Uploaded
Jul 08, 2025
Season
1
Episode
7
Genres
documentary

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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...
S01 • E02 However, something about the wall looks conspicuous, - Secrets of the Underground 00:07
However, something about the wall looks conspicuous,
S01 • E01 When it came to the art of eluding capture, - Secrets of the Underground 00:05
When it came to the art of eluding capture,
S01 • E08 But ground penetrating radar is now allowing us to see - Secrets of the Underground 00:06
But ground penetrating radar is now allowing us to see
S01 • E01 At the famous Green Mill Cocktail Lounge in his native Chicago, - Secrets of the Underground 00:09
At the famous Green Mill Cocktail Lounge in his native Chica...
S01 • E02 So why was it built? And could it be hiding something? - Secrets of the Underground 00:04
So why was it built? And could it be hiding something?
S01 • E07 So far, I found a lot of smoke, But not much fire, - Secrets of the Underground 00:08
So far, I found a lot of smoke, But not much fire,
S01 • E08 And between the scan of the yard - Secrets of the Underground 00:11
And between the scan of the yard
S01 • E01 It's said that when cops raided the joint, - Secrets of the Underground 00:08
It's said that when cops raided the joint,
S01 • E03 ..when you start to look at those kinds of outcomes... Right. - Secrets of the Underground 00:04
..when you start to look at those kinds of outcomes... Right...
S01 • E08 But as exciting as these results are, they aren't conclusive. - Secrets of the Underground 00:05
But as exciting as these results are, they aren't concl...
S01 • E03 ..then the chances of this being a random accident - Secrets of the Underground 00:09
..then the chances of this being a random accident
S01 • E01 From there he could slip into various buildings connected to the tunnels - Secrets of the Underground 00:07
From there he could slip into various buildings connected to...
S01 • E08 We now know there are air gaps under the rec yard - Secrets of the Underground 00:06
We now know there are air gaps under the rec yard
S01 • E08 But the GPR data didn't give us enough detail - Secrets of the Underground 00:06
But the GPR data didn't give us enough detail
S01 • E01 It may sound like the stuff of Hollywood movies, - Secrets of the Underground 00:09
It may sound like the stuff of Hollywood movies,
S01 • E03 Physical evidence of a mass murder in Pennsylvania - Secrets of the Underground 00:08
Physical evidence of a mass murder in Pennsylvania
S01 • E02 (DEEPER THUDDING SOUNDS) - Secrets of the Underground 00:07
(DEEPER THUDDING SOUNDS)
S01 • E08 So, I've got to find some other way at peering underneath Alcatraz - Secrets of the Underground 00:09
So, I've got to find some other way at peering undernea...
S01 • E01 Since ancient times, catacombs in Rome and Paris - Secrets of the Underground 00:10
Since ancient times, catacombs in Rome and Paris
S01 • E07 From this vantage point, - Secrets of the Underground 00:04
From this vantage point,