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Secret History - Season 14 Episode 4
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.
- سال: 2017
- ملڪ: United Kingdom
- نوع: Documentary
- اسٽوڊيو: Channel 4
- چاٻي:
- ڊائريڪٽر: Nick London
- اداڪار:
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