Video Details

Building Big: Tunnels

Core Subject(s): Science
Length: 00:00:00
Usage rights: Download and retain personal copies in perpetuity.

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What keeps a tunnel from collapsing? Tunnels have advanced from dangerous, claustrophobic passages to spacious, safe subterranean networks as roomy as shopping malls. Host David Macaulay takes viewers underground to explore the history and ingenuity behind some of the world's tunneling marvels.



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