https://www.livescience.com/26540-crop-circles.html

Jun 9, 2017 ... Crop circles — strange patterns that appear mysteriously overnight in ... the " messages" is of extraterrestrial origin?), and external information, ...

https://en.wikipedia.org/wiki/Crop_circle

A crop circle or crop formation is a pattern created by flattening a crop, usually a cereal. ... Although obscure natural causes or alien origins of crop circles are ...

https://www.smithsonianmag.com/arts-culture/crop-circles-the-art-of-the-hoax-2524283/

Dec 15, 2009 ... Crop circles are seen by many to enchant a mystical landscape: here, a circle .... has a single, identifiable origin, of established provenance.

https://www.telegraph.co.uk/news/newstopics/howaboutthat/10217151/Crop-circles-demystified-how-the-patterns-are-created.html

Aug 2, 2013 ... The most intricate crop circles, which have baffled experts and fuelled ... According to cereologists, who study the origins of circles, creators use ...

https://www.nationalgeographic.com/travel/destinations/europe/united-kingdom/pictures-crop-circles-tourism-wiltshire-england/

Oct 19, 2018 ... Whatever their origin, the experience of being in a crop circle can overwhelm even a non-enthusiast. “You walk into them, and there is a definite ...

https://www.mufon.com/crop-circles

Feb 1, 2017 ... Circular Reasoning: The 'Mystery' of Crop Circles ... there is compelling proof that the origins of these mysterious formations is unexplained.

https://www.britannica.com/art/crop-circle

Crop circle, large geometric pattern of flattened crops, most often found in fields in southern England. Crop circles are said by some who have studied them to be  ...

https://skeptoid.com/episodes/4062

Crop circles are commonly known to be man made, yet some still insist they must ... in the way of testable hypotheses about non-human origins of crop circles.

https://artifactsjournal.missouri.edu/2015/08/crop-circles-explained/

Crop circles and their mysterious origins have spawned years of debate and speculation about whether or not they are formed by aliens. Crop circles have been ...

http://www.bbc.co.uk/insideout/south/series1/crop-circles.shtml

Sep 23, 2002 ... Earth energies: Caused by geomagnetic activity. Ley lines act as a vital current flowing through the earth. Extra terrestrial origin: Crop circles ...