What are the mysterious structures in the Gobi desert?

(Image: © Google - © 2011 Cnes/Spot Images, DigitalGlobe, GeoEye)

"If you like puzzling over the meaning of the Nazca lines in southern Peru, crop circles in central England or poring over maps of Area 51then you'll like this. Digital mapping fans today noticed some wild and wacky forms of indeterminate function in China's barren wastes in the Gobi desert."
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