Every well-documented crop circle has been proven to be created by humans.

Crop circles first gained widespread global attention in the late 1970s and 1980s, particularly in southern England. In September 1991, Doug Bower and Dave Chorley confessed to the British newspaper Today that they had been creating these patterns since 1978. They revealed their simple method: a four-foot wooden plank, twine, and a baseball cap fitted with a wire loop to keep their lines straight.In the 1990s, biophysicist W.C. Levengood published studies claiming that plants within crop circles showed cellular changes caused by microwave radiation. However, the scientific community largely rejected these findings because they lacked proper experimental controls and failed to account for natural variations in plant growth. Researchers from the University of Oxford and other institutions have consistently demonstrated that the bending of stalks results from mechanical pressure rather than exotic energy sources.Contemporary crop circle creators, often calling themselves 'circlemakers,' now employ sophisticated satellite technology and laser levels to design their patterns. Groups like the Circlemakers, led by artist John Lundberg, have even been commissioned by major brands for advertising campaigns—further proof that humans can create remarkably complex fractals in a single night. To date, no peer-reviewed scientific evidence has ever substantiated claims linking crop circles to extraterrestrial life or meteorological phenomena like plasma vortexes.