Crop Circles and Their Unknown Causes

Since I saw the movie? Signs? a few years ago, my interest for crop circles greatly increased. In the movie, aliens who used the formations as a map attacked the earth. The suspenseful story line made me think whether this theory could be true, and if we may one day be under attack as in the movie. When I approached my friends for their opinions, I was surprised to find many conflicting theories in attempt to explain the crop circles occurrences. The reasons for creating the pictograms vary greatly because of different evidence found by researchers. …