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Each is made of concrete and steel three and a half feet thick, weighing over 20 tons
Full Transcript
00:00:01.000 --> 00:00:02.468
Each is made of concrete and steel
00:00:02.468 --> 00:00:06.653
three and a half feet thick, weighing over 20 tons.
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Movie Summary
A fascinating look at how modern day structures and engineering technologies have been inspired by ancient discoveries.