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An expert team of engineers use hi-tech explosions and state-of-the-art drilling rigs to tear through solid granite and build an 11-mile underground tunnel, one of the longest in the world.
First Air Date : Jan 04, 2018
Last Air date : Jul 01, 2020
Episode : 29 Episode
Season : 4 Season
Runtime: 45 minutes
Studio: Science
Country: United Kingdom, United States of America
Cast: Julian Barratt
Crew:
