
More than two thousand years ago, with his land under constant attack from nomads, the First Emperor of China came up with a simple solution- build a wall to keep out enemies. It was a wall that kept growing and growing. But its construction came at a huge cost- it is believed...

More than two thousand years ago, with his land under constant attack from nomads, the First Emperor of China came up with a simple solution: build a wall to keep out enemies. It was a wall that kept growing and growing. But its construction came at