I suppose this phenomenon is more "Fortean" than scientific, but there are a few problems connected with it.
Obviouisly, many crop circles are man made. Then thee are the ones that are so designed, so well crafted and accurate both in details and relative measurments within the structure such as "the Julia set" series) that I would REALLY like to meet the guys who carried them out.
The thing is, I have spent the first half of my professional life on working with creative and performing arts. During the course of this I have been a part of much "land art" and large scale works of art so I know first handedly how difficult it is. Then add the second half of my carreer, which has been spent working with engineering and construction. It is HARD to transport a design from blueprints to actual, physical reality.
In conclusion: If somebody actually designed and made "the triple Julia set" just for the hell of it, I would very very VERY much like to hire these guys to come and work for me, a.s.a.p. Not only are they good at designing complex patterns, but they are veritable geniuses at the noble art of creating image representations of said patterns out in the field, with such precision and on such a scale that you have to feel awe.
The question is: Does anyone here have ANY clue about what is behind this phenomenon? Scientific and apropriately skeptical approaches are preferred.
"The idea of God is the sole wrong for which I cannot forgive mankind." (Alphonse Donatien De Sade)