In December, 1990, Michigan biophysicist Wm.C. Levengood contacted Pat Delgado (one of the very early British crop circle investigators), expressing an interest in examining plants taken from crop circles (samples) and comparing them with plants taken elsewhere in the same fields (controls). Mr. Delgado began shipping crop circle plant samples and controls from various British crop formations to Levengood's Michigan laboratory and, almost immediately, Levengood began observing anomalies in the circle plants: the seeds from many of the crop circle plants were visibly smaller than the controls, and weighed less -- in one case, although the seed-head and glumes appeared basically normal externally, when the glumes (tissue surrounding each seed) were opened they were found to be devoid of seeds altogether. This was a highly unusual finding in a wheat crop planted for commercial harvest.
At this early stage of investigation Levengood pursued various experimental evaluations, some of which were non-productive, others of which began to form the basis of a consistent description of characteristic changes in crop circle plants. He had begun to document abnormal enlargement of the growth nodes in the circle plant stems, and seed-germination studies were revealing clear alterations in the normal development of the seedling embryos, indicating interference in the reproductive capacity of the circle plants. It was obvious that something unusual was affecting these crop circle plants -- the question, of course, was what?
By 1992 John Burke, a New York businessman with a strong avocational interest in geomagnetic and electromagnetic theory, and Nancy Talbott, a music producer with a research background at the University of Maryland and at Harvard College, had both become interested in the crop circle phenomenon and had contacted Levengood about his crop circle research. Excited by the early laboratory results and Levengood's conviction that something highly unusual was taking place in the crop fields, Burke and Talbott were interested in assisting the research effort and an informal collaboration -- the "BLT" (Burke, Levengood, Talbott) Research Team began to take shape.