geekosystem

When most of us think of the Great Wall of China, we think of the picture above: A high wall, snaking along mountainous ridges. However, the world's mightiest border crossing is far more complex. It is, in reality, a hodgepodge of segments, some of which aren't even "walls," and some are parallel to each other. A new survey finally takes all of that into account and adds some 8,000 miles to its total length.