How immersed tube tunnels are built.
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Immersed tube construction makes tunneling less like drilling a hole and more like docking a spacecraft.

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Source: https://www.youtube.com/watch?v=U6fBPdu8w9U
Video by Grady Hillhouse
Edited by Wesley Crump
Produced by Ralph Crewe
Graphics by Nebula Studios

The Most Implausible Tunneling Method

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