The Great Wall of China was actually greater than it is now

Who would've thought

The Great Wall of China is even greater than previously thought, according to the first detailed survey to establish the length of the ancient barricade.

A two-year government mapping study found that the wall spans 8,850km (5,500 miles) - until now, the length was commonly put at about 5,000km.

Previous estimates of its length were mainly based on historical records.