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[Rob] One crucial material
was missing, puddling clay, which would have made
the bridge watertight
was missing, puddling clay, which would have made
the bridge watertight
Full Transcript
00:00:01.000 --> 00:00:04.000
[Rob] One crucial material
was missing,
00:00:04.067 --> 00:00:05.467
puddling clay,
00:00:05.467 --> 00:00:08.002
which would have made
the bridge watertight.
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Movie Summary
The world's most incredible engineering projects are revisited to uncover why places full of mysteries and untold secrets are now abandoned ruins.