Crop circle
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A crop circle, crop formation, or corn circle is a pattern created by flattening a crop, usually a cereal. The term was coined in the early 1980s. Crop circles have been described as all falling "with
Aerial view of crop circles in Switzerland
Aerial view of a crop circle in Diessenhofen
Detail of a crop circle in a field in Switzerland
Sketch of a "spaceship" creating crop circles, sent to UK Ministry of Defence circa 1998
Cropmark
Videos
Cropmarks or crop marks are a means through which sub-surface archaeological, natural and recent features may be visible from the air or a vantage point on higher ground or a temporary platform. Such
Crop circle
…located within a 15 km (9.3 mi) radius of the Avebury stone circles. In contrast to crop circles or crop formations, archaeological remains can cause cropmarks in the fields in the shapes of circles and squares, but these do not appear overnight, and are always in the same places every year. A 1678 news pamphlet…
Cropmarks at a protohistoric site at Grézac, France
Sketched diagram of a negative cropmark above a wall and a positive cropmark above a ditch
Crop marks in Gloucestershire. Cereal crop left, beans right. The relative intensity in the crops was reversed in the near infrared.
Near infra-red kite aerial photo at Rufford Abbey, Nottinghamshire, UK