I thought that the crop circle mystery had been solved years ago!
There was a famous case in Britain where crop circles appeared in a corn field. They got more and more elaborate as time went on and they set up camera and found the real culprits - a couple of guys having a bit of fun on a tractor!
I agree with ving - why would aliens come all the way to earth just to do a bit of Backyard Blitz in a corn field!
