มนุษย์ต่างดาว หรือ เอเลี่ยนทำ Crop Circle ได้ยังไง

Crop Circle - June 2005 | Crystal Moon, originally uploaded by CrystalEagle.

Crop circle is a term used to describe patterns created by the flattening of crops such as wheat, barley, canola, rye, corn, linseed and soy. 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.