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When I started this investigation
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Secrets of the Underground

When I started this investigation, I definitely didn't see this coming

When I started this investigation, I definitely didn't see this coming

Full Transcript

00:00:01.000 --> 00:00:02.088
When I started this investigation,
00:00:02.096 --> 00:00:04.084
I definitely didn't see this coming.
Duration
5 seconds
Views
13
Timestamp in Movie
00:43:25
Uploaded
Jul 13, 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 • E03 And these cycles effectively filter out the sediment - Secrets of the Underground 00:08
And these cycles effectively filter out the sediment
S01 • E01 But technology may finally be revealing - Secrets of the Underground 00:37
But technology may finally be revealing
S01 • E08 But our scientific analysis of this long-lost rock formation - Secrets of the Underground 00:08
But our scientific analysis of this long-lost rock formation
S01 • E02 Our scientific analysis of Serpent Mound has revealed secrets - Secrets of the Underground 00:09
Our scientific analysis of Serpent Mound has revealed secret...
S01 • E03 So the lodge has decided not to try to seal the leaks artificially, - Secrets of the Underground 00:08
So the lodge has decided not to try to seal the leaks artifi...
S01 • E08 Like the fact that the Great Lakes were once much smaller - Secrets of the Underground 00:05
Like the fact that the Great Lakes were once much smaller
S01 • E02 For starters, I was able to confirm that the mound - Secrets of the Underground 00:10
For starters, I was able to confirm that the mound
S01 • E08 That mastodons and people crossed paths - Secrets of the Underground 00:06
That mastodons and people crossed paths
S01 • E03 With a little luck, there still may be generations - Secrets of the Underground 00:06
With a little luck, there still may be generations
S01 • E08 And that our prehistoric ancestors had advanced strategies - Secrets of the Underground 00:08
And that our prehistoric ancestors had advanced strategies
S01 • E03 Mountain Lake has been hiding its secrets for centuries, - Secrets of the Underground 00:06
Mountain Lake has been hiding its secrets for centuries,
S01 • E02 Instead, this mound likely served a dual purpose - Secrets of the Underground 00:06
Instead, this mound likely served a dual purpose
S01 • E08 This curious collection of stones has preserved its secrets for millennia, - Secrets of the Underground 00:08
This curious collection of stones has preserved its secrets ...
S01 • E02 It was a tribute to the serpent god they revered, - Secrets of the Underground 00:12
It was a tribute to the serpent god they revered,
S01 • E01 The Mima Mounds have preserved their secrets for millennia. - Secrets of the Underground 00:04
The Mima Mounds have preserved their secrets for millennia.
S01 • E02 The Serpent Mound has hidden its secrets for centuries... - Secrets of the Underground 00:05
The Serpent Mound has hidden its secrets for centuries...