Examples can be found world wide. Various hypotheses have been offered to explain their formation, ranging from the naturalistic to the paranormal.
Naturalistic explanations include man-made hoaxes or geological anomalies, while paranormal explanations include formation by UFOs. Many circles are known to be man-made,[1][2][3] such as those created by Doug Bower, Dave Chorley, and John Lundberg,[4] and a 2000 study into circle hoaxing concluded that
80 percent of UK circles were definitely man-made
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