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Wikipedia wrote:Crop circles is a term used to describe patterns created by the flattening of crops such as wheat, barley, rapeseed (also called "canola"), rye, corn, linseed and soy. The term was first used by researcher Colin Andrews to describe simple circles he was researching. Since 1990 the circles evolved into complex geometries, but by then the term had stuck. Examples can be found worldwide. Various hypotheses have been offered to explain their formation, ranging from the naturalistic to the paranormal.