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Secret History

Season 14 • Episode 4 • The Great Wall of China: The Hidden Story

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Secret History Season 14, Episode 4: The Great Wall of China: The Hidden Story

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With access to the first nationwide survey and state-of-the-art drones mapping the Great Wall of China, this documentary offers new evidence that reveals its extraordinary magnitude, rewrites its millennia-long history and decodes its complex signals system. Using cutting-edge chemistry, the programme also finds out what has kept the wall standing for so long - a simple cooking ingredient found in kitchens across the world. Watch Secret History Season 14, Episode 4 The Great Wall of China: The Hidden Story in HD free online. Enjoy high-quality streaming of Secret History Season 14, Episode 4 and share your thoughts in the comments below!

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The Great Wall of China: The Hidden Story

With access to the first nationwide survey and state-of-the-art drones mapping the Great Wall of China, this documentary offers new evidence that reveals its extraordinary magnitude, rewrites its millennia-long history and decodes its complex signals system. Using cutting-edge chemistry, the programme also finds out what has kept the wall standing for so long - a simple cooking ingredient found in kitchens across the world.