 At that time, it was also more likely that an unknown factor was behind the incidents, not least seen in light of the fact that GPS was not available to the public.It has been suggested that crop circles may be the result of extraordinary meteorological phenomena ranging from freak tornadoes to ball lightning, but there is no evidence of any crop circle being created by any of these causes.In 1880, an amateur scientist, John Rand Capron, wrote a letter to the editor of journal "Nature" about some circles in crops and blamed them on a recent storm, saying their shape was "suggestive of some cyclonic wind action".