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It really cannot be spontaneous, simultaneous death
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Secrets of the Underground

It really cannot bespontaneous, simultaneous death of all 50-plus peoplefrom cholera....

It really cannot be
spontaneous, simultaneous death of all 50-plus people
from cholera. Right

Full Transcript

00:00:01.000 --> 00:00:05.064
It really cannot be spontaneous, simultaneous death
00:00:05.072 --> 00:00:09.016
of all 50-plus people from cholera. Right.
Duration
9 seconds
Views
18
Timestamp in Movie
00:15:36
Uploaded
Jul 13, 2025
Season
1
Episode
3
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 • E08 And our ground penetrating radar - Secrets of the Underground 00:06
And our ground penetrating radar
S01 • E07 That this volcano Is about to blow? - Secrets of the Underground 00:04
That this volcano Is about to blow?
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...
S01 • E03 In fact, Janet suspects - Secrets of the Underground 00:06
In fact, Janet suspects
S01 • E08 Right now it looks like we're looking at an arch - Secrets of the Underground 00:13
Right now it looks like we're looking at an arch
S01 • E07 I think I probably should Get back to the car. - Secrets of the Underground 00:04
I think I probably should Get back to the car.
S01 • E03 The issue is, though, how did they actually die? - Secrets of the Underground 00:04
The issue is, though, how did they actually die?
S01 • E01 The next step is to determine what lies beneath it, - Secrets of the Underground 00:06
The next step is to determine what lies beneath it,
S01 • E02 It refers to the edges of the magnetic field emitted by the sonde - Secrets of the Underground 00:07
It refers to the edges of the magnetic field emitted by the ...
S01 • E03 The real, sort of, powerful bit of data - Secrets of the Underground 00:12
The real, sort of, powerful bit of data
S01 • E07 Within the boundaries Of this ancient supervolcano. - Secrets of the Underground 00:05
Within the boundaries Of this ancient supervolcano.
S01 • E01 I'm going to run a vertical stripe from here over. - Secrets of the Underground 00:05
I'm going to run a vertical stripe from here over.
S01 • E08 Here to the top, roughly about, what is that, six inches? Yeah. - Secrets of the Underground 00:04
Here to the top, roughly about, what is that, six inches? Ye...
S01 • E07 To do that, I need to know What's going on underground. - Secrets of the Underground 00:05
To do that, I need to know What's going on underground.
S01 • E08 The question is, does this opening connect to the main cellblock - Secrets of the Underground 00:09
The question is, does this opening connect to the main cellb...