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Agricultural terraces

Incan agricultural terraces at Moray, Peru. These consist of several terraced circular depressions that are believed to have been used to study the effects of different climactic conditions on crops. The depth of the pits (the largest is about 30 m deep) creates a temperature gradient of as much as 15° C between the top and the bottom.

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Uploaded on January 16, 2008
Taken on August 30, 2007