So, this researcher says that crop circles are the result of microwaves from lightning strikes. I can kind of see that, but only for the simplest of crop disturbances. Simple circles yes, complex geometric shapes no. Those are due to kids with too much time on their hands.
http://www.nyos.lv/
In crop fields of South England, located over chalky stratum, instantaneous mass transfer between atmosphere and monolith of the chalk draw of the CROP CIRCLES.
Instantaneous mass transfer between atmosphere and monolith of the chalk appear when the rift in monolith of the chalk instantaneously be forming.