How Was the Great Wall of China Built?

Transcript

The myth that you can see the Great Wall of  China from space has long been disproven. However, this does not make the structure any  less impressive. As walls go, it's pretty big, and it is the longest manmade structure in the  world. But how was it built in the first place? Like Rome, the Great Wall wasn't built in a day  and is an amalgamation o... Read More