"... this reminded me of a bakery with which I was associated a decade ago that was faced with a most curious problem.
Dough, prepared perfectly normally, was placed in the ovens with the expectation that ordinary, unremarkable loaves would emerge. But the resulting products had interesting, but meaningless symbols on their crusts.
It was a phenomenon that lasted only a week or so and never recurred. The loaves were perfectly edible; in fact they were sold at a premium.
No explanation was ever put forward for this curiosity - the ovens were operating normally and none of the staff could have been responsible.
It remains a mystery to this day. Mind you, we did track the history of the flour and discovered that it had been milled from grain grown in fields with crop circles!
There are numerous theories about how corn circles come about: man made, vortexes, UFOs, alien messages etc. etc. but what effects are there, if any, when the grain is used for baking or whatever? Do strange symbols occur, does it taste the same and so on?
Dr. William Levengood from the University of Michigan claims that the plants, in genuine crop circles, undergo changes and this includes a swelling of the nodes (knuckle like joints on the stems). Okay, so the nodes may alter but what about the actual grains?
The Mystery Of 3D And Other Corn Circles