Over the years, crop formations have evolved from simple circles to doubles, triples and multiples. Rings then began to surround the circles until around 1990, when new design elements began to appear, including lengthy hieroglyphics
http://www.bbc.co.uk/dna/h2g2/A724204
For those of you who are interested in aliens and crop circles, link to the above website.
Is there anybody out there, or are crop circles just a complete hoax. whatever you believe, one cannot help but admire the intricate and complex geometric patterns, that for some strange reason, usually appear in wheat fields mostly in England. Wheatabix has never been more interesting.
