This is close.
The whole thing begins to make sense once we realize that the earth is flat. We live on the backside of a huge flat blackboard (whiteboard, scratch paper, or whatever) used by aliens in their schools and universities. There are many of these in the universe. The flat disk of the earth is thin enough that student doodles made in alien art and math classes "bleed through" to our side. This happens because their writing instruments emit mitogenetic radiation (M-rays) that are well known to affect some living plants, especially wheat, barley, oats and corn. [2] M-rays weaken the stalk structure near the ground, and the stalks bend over gently to lie flat on the ground, showing no evidence of forceful breaking. So the crop circles in grain fields are nothing more than the reverse pattern of alien students' diagrams made in geometry class.