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That's because of a phenomenon called granular convection
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Secrets of the Underground

That's because of a phenomenoncalled granular convection, also known as the Brazil nut...

That's because of a phenomenon
called granular convection, also known as the Brazil nut effect

Full Transcript

00:00:01.000 --> 00:00:04.084
That's because of a phenomenon called granular convection,
00:00:04.092 --> 00:00:08.008
also known as the Brazil nut effect.
Duration
8 seconds
Views
20
Timestamp in Movie
00:38:54
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 • E08 It looks to me like maybe these are some sort of legs in here. - Secrets of the Underground 00:06
It looks to me like maybe these are some sort of legs in her...
S01 • E03 If the boulder field does extend - Secrets of the Underground 00:10
If the boulder field does extend
S01 • E02 And could this coil be a clue about the strange site's true purpose? - Secrets of the Underground 00:05
And could this coil be a clue about the strange site's ...
S01 • E02 I need to keep digging for answers, - Secrets of the Underground 00:09
I need to keep digging for answers,
S01 • E01 Then simulate seismic activity by shaking them up. - Secrets of the Underground 00:06
Then simulate seismic activity by shaking them up.
S01 • E03 But if we find only bedrock, - Secrets of the Underground 00:11
But if we find only bedrock,
S01 • E07 We know there's Surveyors marks out there, - Secrets of the Underground 00:04
We know there's Surveyors marks out there,
S01 • E08 If you look at this and you start sketching it, - Secrets of the Underground 00:08
If you look at this and you start sketching it,
S01 • E02 Brad has uncovered numerous artefacts at historical sites around the area. - Secrets of the Underground 00:06
Brad has uncovered numerous artefacts at historical sites ar...
S01 • E07 Now that we have rti, - Secrets of the Underground 00:06
Now that we have rti,
S01 • E01 Smaller rice kernels filter down into the spaces created by jostling, - Secrets of the Underground 00:07
Smaller rice kernels filter down into the spaces created by ...
S01 • E02 I'm hoping some of these priceless antiquities - Secrets of the Underground 00:07
I'm hoping some of these priceless antiquities
S01 • E08 Unbelievable! A mastodon carving on a rock - Secrets of the Underground 00:08
Unbelievable! A mastodon carving on a rock
S01 • E07 And try to look back In the literature, - Secrets of the Underground 00:05
And try to look back In the literature,
S01 • E03 My job in this experiment is to create a mini-earthquake. - Secrets of the Underground 00:05
My job in this experiment is to create a mini-earthquake.
S01 • E01 So with all the earthquakes - Secrets of the Underground 00:10
So with all the earthquakes
S01 • E03 Rob is hitting a steel plate with the sledgehammer - Secrets of the Underground 00:07
Rob is hitting a steel plate with the sledgehammer
S01 • E02 And I've got a couple of objects back here - Secrets of the Underground 00:09
And I've got a couple of objects back here
S01 • E08 Mastodons are an ancient ancestor of elephants and woolly mammoths. - Secrets of the Underground 00:05
Mastodons are an ancient ancestor of elephants and woolly ma...
S01 • E07 That could have Ancient irish origins, - Secrets of the Underground 00:06
That could have Ancient irish origins,