Alberto Donini analyses the ears of corn taken from inside and near a crop circle that appeared in the countryside of Finale Emilia on 9 June 2013. From the elongation of the nodes and pulvini of the stems, and from the resulting calculations, he hypothesises the existence of a point source of electromagnetic waves that emitted microwaves from a certain height above the grasses. The heating of the cellular fluids in the nodes would have caused them to elongate in the ears of corn inside the formation compared to those outside, with greater elongation in the centre of the circles than at the periphery, and in the upper nodes than in the lower ones, a symmetry compatible with the emission of spherical electromagnetic waves.
Alberto Donini (Sat,) studied this question.