When those who it was built for are not present

[Image: Photo by Kai Caemmerer]. I've got a new article up over at New Scientist looking at the so-called "ghost cities" of China, and where exactly they can be found. This is not as straightforward as it sounds:It seems hard to lose track of an entire city. But that appears to be what?s taken place?and not just once, but over and over ag...

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