Secrets at the Great Wall - S1.E6 - If We Built It Today
The Great Wall of China is one of the world's greatest engineering marvels, and it took dangerous, cutting-edge construction to build it. Experts use the latest tech and modern-day science to reveal if building it a second time would be just as deadly.
Secrets at the Great Wall - S1.E6 - If We Built It Today
August 18, 2019
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