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Published online 24 November 2004 | Nature | doi:10.1038/news041122-9

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Secret of world's biggest dunes revealed

Water hidden beneath Chinese desert keeps sandy structures in place.

The mystery of how the world's largest stationary sand dunes stay upright has finally been uncovered. Geologists had been baffled at how the 500-metre-high dunes in China's Badain Jaran desert remain standing in the face of savage winds.

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