{"id":423,"date":"2017-06-23T21:54:55","date_gmt":"2017-06-23T20:54:55","guid":{"rendered":"http:\/\/videos.ac-am.fr\/?p=423"},"modified":"2023-05-08T12:16:01","modified_gmt":"2023-05-08T10:16:01","slug":"comment-se-forme-les-cercles-de-culture-crop-circles","status":"publish","type":"post","link":"https:\/\/webradio.ac-am.fr\/index.php\/2017\/06\/23\/comment-se-forme-les-cercles-de-culture-crop-circles\/","title":{"rendered":"Comment se forme les cercles de culture (crop circles) ?"},"content":{"rendered":"\n<figure class=\"wp-block-video\"><video controls src=\"https:\/\/videos.ac-am.fr\/Items\/2ef1099345c48983ec6527c735c45ea1\/Download?api_key=67b0bb80b6bf475998b24ccf1bd84219\"><\/video><\/figure>\n\n\n<table style=\"width: 100%: border: none;\">\n<tbody>\n<tr>\n<td style=\"text-align: left; border: none;\">\n<p>Un cercle de culture (traduction litt\u00e9rale de la locution anglaise \u00ab crop circle \u00bb et parfois d\u00e9sign\u00e9 en fran\u00e7ais par les n\u00e9ologismes \u00ab agrogramme \u00bb ou \u00ab agroglyphe \u00bb), est un vaste motif ou ensemble de motifs g\u00e9om\u00e9triques r\u00e9alis\u00e9 dans un champ de c\u00e9r\u00e9ales (g\u00e9n\u00e9ralement de bl\u00e9) par flexion ou fl\u00e9trissure des \u00e9pis, visible depuis le ciel.<\/p>\n<p>Ces formes peuvent aller d&rsquo;un simple cercle de quelques m\u00e8tres de diam\u00e8tre \u00e0 des compositions de plusieurs hectares comportant de nombreuses figures dispos\u00e9es selon une composition g\u00e9om\u00e9trique.<\/p>\n<p>Les premi\u00e8res compositions g\u00e9om\u00e9triques de tr\u00e8s grande taille observ\u00e9es sur des cultures datent de la g\u00e9n\u00e9ralisation de la prospection arch\u00e9ologique par photographie a\u00e9rienne qui a r\u00e9v\u00e9l\u00e9 des sites antiques : plans de villas romaines, compositions monumentales pr\u00e9historiques ou celtes, implantations m\u00e9di\u00e9vales disparues. Les photos faisaient appara\u00eetre ces formes \u00e0 cause de la diff\u00e9rence de maturit\u00e9 ou de pigmentation des culture dues \u00e0 des changements locaux de qualit\u00e9 ou d&rsquo;humidit\u00e9 des sols provoqu\u00e9s par des restes de remblais ou de fouilles, des vestiges min\u00e9raux ou organiques.<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center; border: 0px; width: 585px;\"><img loading=\"lazy\" decoding=\"async\" src=\"\/wp-content\/uploads\/2020\/05\/crop_circle.jpg\" alt=\"Photo d'un cercle de culture complexe\" width=\"585\" height=\"455\" border=\"0\"><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; border: none;\">\n<p>Les premiers cercles de culture imprim\u00e9s dans la v\u00e9g\u00e9tation ont \u00e9t\u00e9 observ\u00e9s \u00e0 la fin des ann\u00e9es 1960 dans des pays anglo-saxons: en Australie, au Canada et en Angleterre.<\/p>\n<p>Ils ont inspir\u00e9 deux Anglais, Doug Bower et Dave Chorley, qui ont d\u00e9clar\u00e9, en 1991, en avoir r\u00e9alis\u00e9 des centaines d&rsquo;autres \u00e0 partir de 1978 par plaisanterie.<\/p>\n<p>Bien qu&rsquo;une majorit\u00e9 de scientifiques et les sceptiques affirment que l&rsquo;origine des agroglyphes apparus dans la campagne anglaise est maintenant connue, divers amateurs de ph\u00e9nom\u00e8nes paranormaux continuent d&rsquo;avancer des explications alternatives : ph\u00e9nom\u00e8nes naturels inconnus, manifestations ufologiques ou manifestations d&rsquo;\u00e9nergie.<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>","protected":false},"excerpt":{"rendered":"<p>Un cercle de culture (traduction litt\u00e9rale de la locution anglaise \u00ab crop circle \u00bb et parfois d\u00e9sign\u00e9 en fran\u00e7ais par [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[261],"tags":[],"class_list":["post-423","post","type-post","status-publish","format-standard","hentry","category-ovnis"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Comment se forme les cercles de culture (crop circles) ? 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