This is a very basic observation but: are crop circles the result of a flying saucer landing? After all, flying saucers are circular too. They would have to land in a field which is where crop circles are. The imprints are melted into the ground and are sometimes radioactive (vegetation grows in discolored or does no grow in at all). This would be evident as these crafts could use some form of nuclear energy. What are your thoughts on how and why they are formed?