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I'm putting that theory to the test
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Secrets of the Underground

I'm putting that theory to the test with a piece of plywood, some sandand a hammer to...

I'm putting that theory to the test with a piece of plywood, some sand
and a hammer to replicate seismic activity

Full Transcript

00:00:01.000 --> 00:00:02.068
I'm putting that theory to the test
00:00:02.076 --> 00:00:05.032
with a piece of plywood, some sand and a hammer
00:00:05.004 --> 00:00:07.006
to replicate seismic activity.
Duration
8 seconds
Views
29
Timestamp in Movie
00:33:40
Uploaded
Jul 12, 2025
Season
1
Episode
1
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 Yeah, I mean, erm...honestly, it is really hard to see. - Secrets of the Underground 00:04
Yeah, I mean, erm...honestly, it is really hard to see.
S01 • E02 Could this be the first glimpse of an ancient clue - Secrets of the Underground 00:07
Could this be the first glimpse of an ancient clue
S01 • E07 An ogham sign for "Lord." - Secrets of the Underground 00:05
An ogham sign for "Lord."
S01 • E01 Look at that! All of a sudden it's forming mounds on the surface. - Secrets of the Underground 00:05
Look at that! All of a sudden it's forming mounds on th...
S01 • E03 It's freezing cold, very cold. - Secrets of the Underground 00:04
It's freezing cold, very cold.
S01 • E07 Vance thinks It's highly unlikely, - Secrets of the Underground 00:06
Vance thinks It's highly unlikely,
S01 • E01 Right down here, you can see what looks exactly like the Mima Mounds, - Secrets of the Underground 00:08
Right down here, you can see what looks exactly like the Mim...
S01 • E03 The ROV's umbilical leads me toward the trapped sub... - Secrets of the Underground 00:05
The ROV's umbilical leads me toward the trapped sub...
S01 • E08 We're just going down, looking and taking pictures. OK. - Secrets of the Underground 00:04
We're just going down, looking and taking pictures. OK.
S01 • E02 I'm using ground penetrating radar - Secrets of the Underground 00:06
I'm using ground penetrating radar
S01 • E08 Mark and Hank have agreed to allow just one dive to the site. - Secrets of the Underground 00:05
Mark and Hank have agreed to allow just one dive to the site...
S01 • E02 And I've just come across an underground anomaly - Secrets of the Underground 00:07
And I've just come across an underground anomaly
S01 • E07 In connecticut 1,500 years ago, - Secrets of the Underground 00:06
In connecticut 1,500 years ago,
S01 • E01 The problem is, I'm not sure if this scales up to a larger level, - Secrets of the Underground 00:09
The problem is, I'm not sure if this scales up to a lar...
S01 • E03 It's wedged deep in what appears to be a kind of tunnel. - Secrets of the Underground 00:05
It's wedged deep in what appears to be a kind of tunnel...
S01 • E08 If I'm going to solve the mystery of this underwater Stonehenge, - Secrets of the Underground 00:05
If I'm going to solve the mystery of this underwater St...
S01 • E07 The 6th century irish Were expert seafarers, - Secrets of the Underground 00:07
The 6th century irish Were expert seafarers,
S01 • E03 I've been on countless dives in freshwater lakes - Secrets of the Underground 00:08
I've been on countless dives in freshwater lakes
S01 • E02 So down in the ground here, - Secrets of the Underground 00:05
So down in the ground here,
S01 • E07 But could they have made it All the way across the atlantic? - Secrets of the Underground 00:05
But could they have made it All the way across the atlantic?