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Explosive volcanic eruption In north america
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Secrets of the Underground

Explosive volcanic eruptionIn north america

Explosive volcanic eruption
In north america

Full Transcript

00:00:01.000 --> 00:00:04.039
Explosive volcanic eruption In north america.
Duration
4 seconds
Views
14
Timestamp in Movie
00:16:39
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 • E07 That mammoth blast 760,000 years ago. - Secrets of the Underground 00:05
That mammoth blast 760,000 years ago.
S01 • E01 So you can't tell if there's a staircase, - Secrets of the Underground 00:06
So you can't tell if there's a staircase,
S01 • E08 It appears as if the hollow pockets running through the rec yard - Secrets of the Underground 00:14
It appears as if the hollow pockets running through the rec ...
S01 • E07 Was so powerful, - Secrets of the Underground 00:10
Was so powerful,
S01 • E02 And if so, what exactly could they be for? - Secrets of the Underground 00:04
And if so, what exactly could they be for?
S01 • E03 It's 40% collagen, so when someone's hit on the head - Secrets of the Underground 00:08
It's 40% collagen, so when someone's hit on the he...
S01 • E01 It seems clear that at some point - Secrets of the Underground 00:09
It seems clear that at some point
S01 • E02 Just under where Stefan is standing, the tunnel ends at a wall. - Secrets of the Underground 00:05
Just under where Stefan is standing, the tunnel ends at a wa...
S01 • E03 ..the bone actually doesn't fracture or fall apart, it distorts. - Secrets of the Underground 00:06
..the bone actually doesn't fracture or fall apart, it ...
S01 • E08 I came to Alcatraz very sceptical - Secrets of the Underground 00:07
I came to Alcatraz very sceptical
S01 • E07 Is just a small fraction Of that, - Secrets of the Underground 00:05
Is just a small fraction Of that,
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...