Yahoo answers - how to make crop circles
As far as cross hatching, if it isn't detailed in the videos, it's a simple matter of alternating the methodology.
Once again, this is not outside the range or capability for a regular human being to effect.
Another note too, regarding cellular mutations and variability where it may be applicable, whether you or someone else brought it up: This isn't Spiderman where spontaneous mutations occur, but, in nature, mutations occur all the time and occur over the course of the growth of whatever subject has selected for mutation during the seed/embryonic state. Most mutations found were there to begin with, and similar would be found were samples taken from untrod areas of the same field and other untrod fields.
Regarding Radiation: Geometric Solar Radiation Model with Applications for Agriculture and Forestry
Variation in local solar radiation and temperature explains ...
Trends and interannual variability in surface UVB radiation over 8 to 11 years observed ...
I'm sure, however, if you're genuinely actually interested, instead of begging someone to spoon feed you details, you can conduct your own research using any convenient search engine with keywords like "localized background radiation variability" and other terms that apply to the variability of local background radiation levels.
Some people, however, are quite happy with their ignorance, actually preferring to NOT do any research their own, especially where it could upset their convenient and well liked pet mythologies.
No one's ignorance is my responsibility, and only where I feel inclined for any or no reason at all do I put forward some alternatives. Self education, however, is the responsibility of the individual.
A self entitled demand for answers can be satiated by some concerted searches on the internet.
Google is your friend.
You're welcome to ignore, like, or dislike anything you find.
Nothing shown or displayed with the crop circle phenomenon, regardless of how dubious or amazing it may seem, is outside the ability of mere humans to effect.
No strange anomalies are really outside local variation that can easily be found were random sampling thoroughly conducted in untrod areas of the same field with samples from surrounding fields as well.
Were there examples beyond the range of human ability to effect, then, there might be some interesting questions. As it stands, however, nothing shown is outside of or beyond human ability to effect.
edit on 29-8-2012 by Druscilla because: (no reason given)