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Secrets at the Great Wall

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.

English español
  • Originally Aired August 18, 2019
  • Runtime 45 minutes
  • Network Science Channel
  • Created August 19, 2019 by
    Administrator admin
  • Modified March 16, 2022 by
    fran_kli5hf