Site trying to test if researchers are able to distinguish between genuine and man-made crop circles.

Controversial science web site, focusing on scientific study of "non-mainstream" topics such as crop circles. Comparison of crop circle theories.

Has a great interactive archive of crop circle formations. Also includes articles. (Macromedia Flash required)

Steve Canada's collection of books on the topic. Several selections to choose from covering UFOs and other things of this nature as well as working theories. Also lecture and interview information.

Marketing Plan for proposed crop circle breakfast cereal.

Analysis of some of the underlying geometry of crop circles

This site takes a refreshingly irreverent look at the crop circle phenomenon.

Crop formations in Western Canada reported by Judy Arndt. Just a few circles but the reports are excellent with lots of pictures and diagrams.

Articles by Joseph E. Mason and Dee Finney. They believe that the crop circle formations are related to dreams and human consciousness.

Jan-Willem Bobbink's site about his experiences with balls of light. Also crop circle reports and diagrams.

Article about the science, nature, politics and spirituality of crop circles.

An explanation of crop circles: they are prophecies of Book of Revelation events. The Bible Code in English looks at crop circles.

Defining the Crop Circle phenomena.

Book by Carolyn North describes crop circles with many photos.

Crop circle symbols can be easily interpreted using Biblical symbols, the book of Revelation in particular. A few chapters of the book are free on the web site.