17 Sæson
117 Episode
Secret History - Season 14 Episode 4 Afsnit 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.
- Land : United Kingdom
- Genre : Documentary
- Direktør : Nick London
- Cast :
