description About
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.
Info
- verified Status: Ended
- person By: Unknown
- calendar_month Release Date: 2000-10-31
- video_camera_front Companies GBH
- tag Season: Season 1
- timer Episode Runtime: Mins
- star Rating: 0 / 10
- visibilityViews: 2 views
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