In 2004 the BLT (John Burke, Wm.C. Levengood, Nancy Talbott) Research Team posted the most comprehensive scientific study carried out to-date on a single crop circle, a 191-foot long, 7-circle formation in thistle-invested barley in Edmonton, Alberta, Canada.

In spite of this the 7 circles were found to be intricately flattened, with a narrow counter-clockwise band around the perimeter of each circle which was underneath a radially-laid second layer, topped off with a totally chaotic third layer on top:

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