Video: "Sacred Geometry and Crop Circles"

Crop circles 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. A 2000 study into circle hoaxing concluded that 80 percent of UK circles were definitely man-made (Spignesi, Stephen J. (2003) "Crop Circles: Signs of Contact", Career Press, P154).

In general, the early formations (1970–2000) seemed to be based on the principles of sacred geometry. Later formations, those occurring after 2000, appear to be based on other principles, natural sciences and mathematics designs, including fractals. Many crop circles now have fine intricate detail, regular symmetry and careful composition. Elements of three-dimensionality became more frequent, culminating in spectacular images of cube-shaped structures.