No one is able to explain why this seems to occur. Emit sound at 5khz frequency - Researchers have measured a distinct emission of energy at 5khz eminating from fresh crop circles. There have been instances where certain formations take on an entirely different appearance as they continue to grow in the field. For example, one formation got a wavy look within the center of the circle that wasn't there originally. This is 10 times the radiation level of a normal field.
Plants have several going up their stalks.
It was discovered not long ago that various sections of formations can be grouped together according to which node they bend at. Some bend at the knuckle closest to the ground. Yet in a neighboring section they all bend two knuckles up and so on. They are also produced at night without the aid of any lighting. They conduct the electro-magnet currents of the earth well and appear to have something to do with how they are formed.