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[[Doug Bower]] does not believe crop circles have any significance despite their astonishing circular [[symmetry]]. In contrast, some people believe that the crop designs are messages from alien spacecraft. Some maintain that the [[alien]]s are trying to communicate with us using ancient [[Sumer]]ian symbols or symbolic representations of alien [[DNA]]. Those who engage in such serious study and theorizing about crop circles are known as ''cereologists'' (after [[Ceres]], the Roman goddess of [[agriculture]] and [[fertility]]) or ''croppies''. <ref> [http://www.skepdic.com/cropcirc.html crop "circle"]  </ref> Crop circles have been found around the world, including the [[United States]], [[Canada]], [[Australia]], and [[Russia]].

[[Doug Bower]] does not believe crop circles have any significance despite their astonishing circular [[symmetry]]. In contrast, some people believe that the crop designs are messages from alien spacecraft. Some maintain that the [[alien]]s are trying to communicate with us using ancient [[Sumer]]ian symbols or symbolic representations of alien [[DNA]]. Those who engage in such serious study and theorizing about crop circles are known as ''cereologists'' (after [[Ceres]], the Roman goddess of [[agriculture]] and [[fertility]]) or ''croppies''. <ref> [http://www.skepdic.com/cropcirc.html crop "circle"]  </ref> Crop circles have been found around the world, including the [[United States]], [[Canada]], [[Australia]], and [[Russia]]; some believe that also in ancient civilizations like in [[Aztec]] fields.  

Dr. [[Eltjo Haselhoff]] has written a comprehensive book on crop circles, including [[mathematical]] [[analysis]] and field research.<ref>Deepening Complexity of Crop Circles: Scientific Research and Urban Legends,

Dr. [[Eltjo Haselhoff]] has written a comprehensive book on crop circles, including [[mathematical]] [[analysis]] and field research.<ref>Deepening Complexity of Crop Circles: Scientific Research and Urban Legends,