Articles, films and photos from Netherlands based researcher Bert Janssen. His thoughts and articles on crop circles. His encounters with light anomalies and his work on ancient sites.

The BLT Research Team Inc.'s primary goal is the discovery and scientific documentation of physical changes induced in plants, soils and other materials at crop circle sites.

Crop circle research and photography.

Founded by Colin Andrews. An international crop circle research organization with offices in UK, USA, Canada, Australia and Japan.

Dutch researcher Janet Ossebaard's site about crop circles, balls of light and anomalies.

Colin Andrews' crop circle research site.

A comprehensive site investigating the crop circle mystery. Specialises in research and scientific investigation. It also hosts The International Crop Circle Database which is the World's only fully interactive, searchable database of crop formations. Maintained by Paul Vigay.

Home of researchers Ed and Kris Sherwood. Includes extensive crop circle 'luminosity' research and photographic evidence of anomalous 'balls of light'.

Linda Moulton Howe's site has many excellent articles on crop circles.

Eccentric US based researcher Eric Beckjord's site.

Home of the German crop circle researcher and photographer.

Articles about crop circle geometry and information about their videos.

Excellent pictures taken since 1996 by Lucy Pringle, articles, you can order cards, prints, books, calendars and other related merchandises.

Peter R. Sorensen is a researcher who has videotaped more crop circles than anyone else in the last eight years; pages also include portraits of many crop circle researchers, centuries-old Circle Graffiti in Winchester Cathedral, articles.

Researcher Rod Bearcloud Berry's site contains articles and a crop circle gallery.

The regularly updated crop circles site of researcher/lecturer Freddy Silva, offering factual research dedicated to the appreciation and understanding of crop circles, the most dynamic form of multi-dimensional communication to appear in our history.