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That emit an array Of toxic vapors
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Secrets of the Underground

That emit an arrayOf toxic vapors, Including c.O.2,Which tends to accumulate

That emit an array
Of toxic vapors, Including c.O.2,
Which tends to accumulate

Full Transcript

00:00:01.000 --> 00:00:03.056
That emit an array Of toxic vapors,
00:00:03.057 --> 00:00:05.093
Including c.O.2, Which tends to accumulate.
Duration
6 seconds
Views
16
Timestamp in Movie
00:10:23
Uploaded
Jul 13, 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 • E03 Tim thinks it could mark the spot - Secrets of the Underground 00:05
Tim thinks it could mark the spot
S01 • E02 I'll go ahead and eliminate that last one immediately, - Secrets of the Underground 00:09
I'll go ahead and eliminate that last one immediately,
S01 • E08 For decades, rumours persisted among inmates - Secrets of the Underground 00:07
For decades, rumours persisted among inmates
S01 • E01 Are they the work of ancient humans, the earth itself, - Secrets of the Underground 00:08
Are they the work of ancient humans, the earth itself,
S01 • E02 I'm anxious to apply some state-of-the-art technology - Secrets of the Underground 00:06
I'm anxious to apply some state-of-the-art technology
S01 • E07 Are often undetectable To humans, - Secrets of the Underground 00:07
Are often undetectable To humans,
S01 • E08 And I may have just found new evidence to prove it. - Secrets of the Underground 00:05
And I may have just found new evidence to prove it.
S01 • E08 It looks like a crawlspace, like, right in this region right here. - Secrets of the Underground 00:04
It looks like a crawlspace, like, right in this region right...
S01 • E03 With ERT, - Secrets of the Underground 00:06
With ERT,
S01 • E02 But I've just been denied access to the tunnels - Secrets of the Underground 00:07
But I've just been denied access to the tunnels
S01 • E07 Capable of suffocating Anyone who falls in their path. - Secrets of the Underground 00:05
Capable of suffocating Anyone who falls in their path.
S01 • E08 In an old structure like this prison basement, - Secrets of the Underground 00:07
In an old structure like this prison basement,
S01 • E01 I'm in Louisville, Kentucky, - Secrets of the Underground 00:05
I'm in Louisville, Kentucky,
S01 • E02 So I'm heading to another part of town - Secrets of the Underground 00:11
So I'm heading to another part of town
S01 • E03 And now we have this grid of electrodes - Secrets of the Underground 00:07
And now we have this grid of electrodes
S01 • E07 For people to die From something like that, - Secrets of the Underground 00:07
For people to die From something like that,
S01 • E01 I've uncovered two tunnels - Secrets of the Underground 00:08
I've uncovered two tunnels
S01 • E08 But I've got another toy in my toolkit - Secrets of the Underground 00:05
But I've got another toy in my toolkit
S01 • E03 We have 56 electrodes and we want to send electrical current - Secrets of the Underground 00:07
We have 56 electrodes and we want to send electrical current
S01 • E01 But to understand how he could have accessed them, - Secrets of the Underground 00:13
But to understand how he could have accessed them,