There is an ongoing debate between researchers as to the longevity of the phenomenon. Essentially two camps exist within the debate; those who believe that the crop circle phenomenon is a relatively modern occurrence beginning in the mid 1970’s and those who believe that there are reports going back to the beginning of the century and even earlier. The first circle photographed (documented) in the UK was in 1976, however many farmers report circles in their fields going back considerably further than this date. There is a woodcut dating back to the 1600’s known as the ‘Mowing Devil’ which seems to show some kind of circular pattern in a crop field, however opinion is divided as to whether this can be directly linked to the crop circles or not.