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If it is, maybe The Rock wasn't quite as impregnable as we thought
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Secrets of the Underground

If it is, maybe The Rock wasn'tquite as impregnable as we thought

If it is, maybe The Rock wasn't
quite as impregnable as we thought

Full Transcript

00:00:01.000 --> 00:00:04.092
If it is, maybe The Rock wasn't quite as impregnable as we thought.
Duration
5 seconds
Views
17
Timestamp in Movie
00:15:18
Uploaded
Jul 09, 2025
Season
1
Episode
8
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 • E01 If you look at this, right here behind the poker room - Secrets of the Underground 00:11
If you look at this, right here behind the poker room
S01 • E07 Once again, my trusty c.O.2 Detector paints a grim picture. - Secrets of the Underground 00:06
Once again, my trusty c.O.2 Detector paints a grim picture.
S01 • E02 A receiver above ground uses those waves - Secrets of the Underground 00:07
A receiver above ground uses those waves
S01 • E03 And she's sceptical that all 57 workers who went missing - Secrets of the Underground 00:07
And she's sceptical that all 57 workers who went missin...
S01 • E07 Normally, we're at about 350 parts per million. - Secrets of the Underground 00:05
Normally, we're at about 350 parts per million.
S01 • E02 All right, Rob, I'm heading upstairs. Let's see what we can find. - Secrets of the Underground 00:05
All right, Rob, I'm heading upstairs. Let's see wh...
S01 • E03 In the 1830s, cholera's fatality rate was about 60%. - Secrets of the Underground 00:06
In the 1830s, cholera's fatality rate was about 60%.
S01 • E08 I'm in the rec yard of the infamous Alcatraz prison - Secrets of the Underground 00:08
I'm in the rec yard of the infamous Alcatraz prison
S01 • E01 Essentially it's allowing us to pinpoint our investigation - Secrets of the Underground 00:13
Essentially it's allowing us to pinpoint our investigat...
S01 • E07 It's going up more, More, and more. - Secrets of the Underground 00:05
It's going up more, More, and more.
S01 • E02 Stefan, you just let me know when you're outside of the building, over. - Secrets of the Underground 00:05
Stefan, you just let me know when you're outside of the...
S01 • E03 It really cannot be spontaneous, simultaneous death - Secrets of the Underground 00:09
It really cannot be spontaneous, simultaneous death
S01 • E07 That this volcano Is about to blow? - Secrets of the Underground 00:04
That this volcano Is about to blow?
S01 • E08 And our ground penetrating radar - Secrets of the Underground 00:06
And our ground penetrating radar
S01 • E02 I'm going to use the sonde technology - Secrets of the Underground 00:07
I'm going to use the sonde technology
S01 • E03 It can't be, or it would have a mortality from cholera - Secrets of the Underground 00:08
It can't be, or it would have a mortality from cholera
S01 • E07 And obviously, the c.O.2 Has killed all the trees. - Secrets of the Underground 00:05
And obviously, the c.O.2 Has killed all the trees.
S01 • E01 The Lidar revealed exactly where I need to search - Secrets of the Underground 00:09
The Lidar revealed exactly where I need to search
S01 • E02 Go ahead and set that sonde and I'll start looking, over. - Secrets of the Underground 00:04
Go ahead and set that sonde and I'll start looking, ove...
S01 • E08 That could represent an air gap, for sure, which is what a tunnel is, - Secrets of the Underground 00:08
That could represent an air gap, for sure, which is what a t...