{"id":22984,"date":"2021-09-05T18:51:14","date_gmt":"2021-09-05T16:51:14","guid":{"rendered":"https:\/\/www.laterredufutur.com\/accueil\/?p=22984"},"modified":"2021-09-05T18:51:14","modified_gmt":"2021-09-05T16:51:14","slug":"un-vaste-reseau-fluvial-antique-decouvert-sous-le-desert-du-sahara-coulait-il-y-a-encore-5000-ans","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/un-vaste-reseau-fluvial-antique-decouvert-sous-le-desert-du-sahara-coulait-il-y-a-encore-5000-ans\/","title":{"rendered":"Un vaste r\u00e9seau fluvial antique d\u00e9couvert sous le d\u00e9sert du Sahara coulait il y a encore 5000 ans"},"content":{"rendered":"<div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"1\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n<p>Si le Sahara est aujourd&rsquo;hui un endroit sec, sablonneux et pratiquement inhospitalier, il n&rsquo;en a pas toujours \u00e9t\u00e9 ainsi. Des peintures rupestres r\u00e9alis\u00e9es il y a des milliers d&rsquo;ann\u00e9es montrent que la r\u00e9gion regorgeait autrefois d&rsquo;animaux sauvages, des hippopotames aux girafes, et que les anciens agriculteurs y \u00e9levaient m\u00eame leur b\u00e9tail. De nouvelles preuves montrent comment cet \u00e9cosyst\u00e8me luxuriant et verdoyant a pu \u00eatre maintenu, car les chercheurs ont d\u00e9couvert les vestiges d&rsquo;un ancien r\u00e9seau fluvial enfoui sous le d\u00e9sert et perdu dans les sables du temps.<\/p>\n<p>S&rsquo;\u00e9tendant sur plus de 500 kilom\u00e8tres du milieu du Sahara \u00e0 la c\u00f4te de la Mauritanie en Afrique de l&rsquo;Ouest, la rivi\u00e8re aurait \u00e9t\u00e9 aliment\u00e9e par l&rsquo;eau des montagnes de l&rsquo;Atlas au nord et des montagnes du Hoggar \u00e0 l&rsquo;est. En fait, le r\u00e9seau fluvial \u00e9tait si vaste que, s&rsquo;il coulait encore aujourd&rsquo;hui, il serait class\u00e9 comme le 12e plus grand bassin hydrographique de la plan\u00e8te. Les chercheurs, qui ont publi\u00e9 leur \u00e9tude dans Nature Communications, pensent qu&rsquo;il alimentait autrefois le fleuve Tamanrasset.<\/p>\n<p><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"22985\" data-permalink=\"https:\/\/www.laterredufutur.com\/accueil\/un-vaste-reseau-fluvial-antique-decouvert-sous-le-desert-du-sahara-coulait-il-y-a-encore-5000-ans\/fleuve-tamanrasset\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/09\/fleuve-tamanrasset.jpeg?fit=796%2C797&amp;ssl=1\" data-orig-size=\"796,797\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"fleuve tamanrasset\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/09\/fleuve-tamanrasset.jpeg?fit=796%2C797&amp;ssl=1\" class=\"alignnone size-full wp-image-22985\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/09\/fleuve-tamanrasset.jpeg?resize=796%2C797&#038;ssl=1\" alt=\"\" width=\"796\" height=\"797\" srcset=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/09\/fleuve-tamanrasset.jpeg?w=796&amp;ssl=1 796w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/09\/fleuve-tamanrasset.jpeg?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/09\/fleuve-tamanrasset.jpeg?resize=768%2C769&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/09\/fleuve-tamanrasset.jpeg?resize=144%2C144&amp;ssl=1 144w\" sizes=\"auto, (max-width: 796px) 100vw, 796px\" \/><\/p>\n<p>Une image radar des pal\u00e9o-rivi\u00e8res d\u00e9couvertes. L\u2019eau a peut-\u00eatre coul\u00e9 pour la derni\u00e8re fois dans les canaux du r\u00e9seau r\u00e9cemment d\u00e9couvert il y a 5 000 ans.<\/p>\n<p>Une carte des syst\u00e8mes fluviaux et de leurs bassins associ\u00e9s \u00e0 l&rsquo;Afrique du Nord, montrant l&rsquo;ancien fleuve Tamanrasset. Skonieczny et al. 2015<\/p>\n<p><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"22986\" data-permalink=\"https:\/\/www.laterredufutur.com\/accueil\/un-vaste-reseau-fluvial-antique-decouvert-sous-le-desert-du-sahara-coulait-il-y-a-encore-5000-ans\/fleuve-tamanrasset-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/09\/fleuve-tamanrasset-1.jpeg?fit=946%2C644&amp;ssl=1\" data-orig-size=\"946,644\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"fleuve tamanrasset\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/09\/fleuve-tamanrasset-1.jpeg?fit=800%2C545&amp;ssl=1\" class=\"alignnone size-full wp-image-22986\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/09\/fleuve-tamanrasset-1.jpeg?resize=946%2C644&#038;ssl=1\" alt=\"\" width=\"946\" height=\"644\" srcset=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/09\/fleuve-tamanrasset-1.jpeg?w=946&amp;ssl=1 946w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/09\/fleuve-tamanrasset-1.jpeg?resize=300%2C204&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/09\/fleuve-tamanrasset-1.jpeg?resize=800%2C545&amp;ssl=1 800w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/09\/fleuve-tamanrasset-1.jpeg?resize=768%2C523&amp;ssl=1 768w\" sizes=\"auto, (max-width: 946px) 100vw, 946px\" \/><\/p>\n<p>Les contours et le cours principal du fleuve Tamanrasset (aujourd&rsquo;hui Oued Souss sur son embouchure) sont dessin\u00e9s respectivement en bleu et en gris. Le fleuve qui a \u00e9t\u00e9 identifi\u00e9 et le canyon du cap Timiris sont en bleu fonc\u00e9 \u00e0 l\u2019extr\u00eame gauche de la carte.<\/p><div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"2\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n\n<p>La possibilit\u00e9 qu&rsquo;un syst\u00e8me fluvial ait exist\u00e9 dans la r\u00e9gion a \u00e9t\u00e9 \u00e9voqu\u00e9e pour la premi\u00e8re fois il y a une dizaine d&rsquo;ann\u00e9es, suite \u00e0 la d\u00e9couverte de s\u00e9diments fluviaux fins et d&rsquo;un profond canyon sous-marin creus\u00e9 dans le plateau continental au large de la Mauritanie. Cependant, les preuves directes n\u00e9cessaires pour confirmer cette hypoth\u00e8se faisaient d\u00e9faut. Cette fois-ci, les scientifiques ont utilis\u00e9 l&rsquo;imagerie satellite radar orbitale, qui leur a permis de prendre des images de la g\u00e9ologie du Sahara \u00e0 des m\u00e8tres sous la surface sablonneuse en utilisant des micro-ondes. \u00c0 partir de ces donn\u00e9es, les scientifiques ont pu voir les anciens lits de la voie navigable, qui correspondaient incroyablement au canyon au large de la c\u00f4te.<\/p>\n<p>On estime que la rivi\u00e8re a coul\u00e9 p\u00e9riodiquement pendant ce que l&rsquo;on appelle les p\u00e9riodes humides africaines (PHA), dont la derni\u00e8re s&rsquo;est achev\u00e9e il y a environ 5 000 ans, lorsque le Sahara, luxuriant, humide et grouillant d&rsquo;animaux et de vie, s&rsquo;est transform\u00e9 en l&rsquo;endroit sec et poussi\u00e9reux que nous connaissons aujourd&rsquo;hui. On estime que ces changements entre les p\u00e9riodes humides et s\u00e8ches se produisent tous les 20 000 ans environ, \u00e0 mesure que la Terre oscille sur son axe. Les preuves pal\u00e9oclimatiques et arch\u00e9ologiques nous disent qu&rsquo;il y a 11 000 \u00e0 5 000 ans, le lent \u00ab vacillement \u00bb orbital de la Terre a transform\u00e9 le d\u00e9sert du Sahara actuel en une terre couverte de v\u00e9g\u00e9tation et de lacs.<\/p>\n<p>Il est toutefois difficile de d\u00e9terminer si l&rsquo;ancien fleuve situ\u00e9 sous le d\u00e9sert coulera \u00e0 nouveau lors de la prochaine PHA, les choses sont difficiles \u00e0 pr\u00e9voir.<\/p>\n<p>Cette \u00e9tude montre comment le climat peut changer incroyablement vite, si vite qu&rsquo;en quelques milliers d&rsquo;ann\u00e9es seulement, toutes les traces en surface de ce vaste cours d&rsquo;eau antique ont \u00e9t\u00e9 enterr\u00e9es et l&rsquo;\u00e9cosyst\u00e8me local a \u00e9t\u00e9 modifi\u00e9 au point de devenir m\u00e9connaissable. Les chercheurs pr\u00e9voient d&rsquo;utiliser le m\u00eame syst\u00e8me de satellites pour retrouver d&rsquo;autres anciens syst\u00e8mes fluviaux dissimul\u00e9s sous les sables du Sahara, qui pourraient \u00eatre reli\u00e9s \u00e0 d&rsquo;autres \u00e9l\u00e9ments marins et sous-marins.<\/p>\n<p>Adaptation <a href=\"https:\/\/www.laterredufutur.com\/accueil\/\" target=\"_blank\" rel=\"noopener\">Terra Projects<\/a><\/p>\n<p>Sources : <a href=\"https:\/\/topdestinationsalgerie.com\/le-sahara-algerien-abritait-une-gigantesque-riviere-ou-la-vie-prosperait-en-abondance\/\" target=\"_blank\" rel=\"noopener\">https:\/\/topdestinationsalgerie.com\/<\/a> \/ <a href=\"https:\/\/www.iflscience.com\/environment\/vast-ancient-river-system-discovered-under-sands-sahara-desert\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.iflscience.com\/<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"22984\">(2016)<\/p>\n<!--CusAds0-->\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Si le Sahara est aujourd&rsquo;hui un endroit sec, sablonneux et pratiquement inhospitalier, il n&rsquo;en a pas toujours \u00e9t\u00e9 ainsi. Des&#8230;<\/p>\n","protected":false},"author":1,"featured_media":18182,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"ngg_post_thumbnail":0,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"Un vaste r\u00e9seau fluvial antique d\u00e9couvert sous le #d\u00e9sert du #Sahara coulait il y a encore 5000 ans @laterredufutur.com Terra Projects","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[33,20],"tags":[196,2727,636,7719],"class_list":["post-22984","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-archeologie","category-climat","tag-afrique","tag-fleuve","tag-sahara","tag-tamanrasset","wpcat-33-id","wpcat-20-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/amazonie-1.jpg?fit=1000%2C667&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-5YI","jetpack-related-posts":[{"id":25445,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-desert-du-sahara-etait-autrefois-une-savane-verdoyante\/","url_meta":{"origin":22984,"position":0},"title":"Le d\u00e9sert du Sahara \u00e9tait autrefois une savane verdoyante","author":"Admin","date":"22 d\u00e9cembre 2023","format":false,"excerpt":"Le plateau alg\u00e9rien du Tassili N'Ajjer est le plus grand parc national d'Afrique. Parmi ses vastes formations de gr\u00e8s se trouve peut-\u00eatre le plus grand mus\u00e9e d'art du monde. Plus de 15 000 gravures et peintures y sont expos\u00e9es, dont certaines datent de 11 000 ans selon les techniques de\u2026","rel":"","context":"Dans &quot;Climat&quot;","block_context":{"text":"Climat","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/climat\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/08\/sahara-vert.jpg?fit=1000%2C667&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/08\/sahara-vert.jpg?fit=1000%2C667&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/08\/sahara-vert.jpg?fit=1000%2C667&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/08\/sahara-vert.jpg?fit=1000%2C667&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":3701,"url":"https:\/\/www.laterredufutur.com\/accueil\/quand-les-riveres-coulaient-dans-le-sahara-ii\/","url_meta":{"origin":22984,"position":1},"title":"Quand les riv\u00e8res coulaient dans le Sahara II","author":"Admin","date":"15 octobre 2006","format":false,"excerpt":"Si l'eau devait revenir gr\u00e2ce aux cycles r\u00e9currents, le Sahara pourrait retrouver une humidit\u00e9 perdue depuis des si\u00e8cles. Un cycle de 20000 ans irait dans ce sens. Ici, nous allons voir une galerie d'images extraordinaires du Sahara avec ses ramifications fluviales ass\u00e9ch\u00e9es. Des rivi\u00e8res ne demandent que de reprendre leurs\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2006\/10\/sahara1.jpg?fit=500%2C397&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":1022,"url":"https:\/\/www.laterredufutur.com\/accueil\/namibie-tresor-aquatique-origine-et-climat-passe\/","url_meta":{"origin":22984,"position":2},"title":"Namibie, tr\u00e9sor aquatique, origine et climat pass\u00e9","author":"Admin","date":"21 ao\u00fbt 2012","format":false,"excerpt":"Une nappe phr\u00e9atique de cinq millions de m\u00e8tres cubes d'eau a \u00e9t\u00e9 localis\u00e9e. De quoi alimenter le pays pendant 400 ans. La d\u00e9couverte r\u00e9cente d'une r\u00e9serve d'eau datant de l'\u00e2ge de pierre pourrait changer la vie dans le nord de la Namibie en apportant \u00e0 cette r\u00e9gion d\u00e9sertique de quoi\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"namibie entre hier et aujourd'hui","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/wordpress\/wp-content\/uploads\/2012\/08\/namibie-hier-aujourdhui.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":7742,"url":"https:\/\/www.laterredufutur.com\/accueil\/la-grande-muraille-verte-du-sahara-pour-reverdir-le-sahara\/","url_meta":{"origin":22984,"position":3},"title":"La Grande muraille verte du Sahara pour reverdir le Sahara","author":"Admin","date":"6 ao\u00fbt 2015","format":false,"excerpt":"A l'heure o\u00f9 l'on parle de la plan\u00e8te Mars, voire de la terraformer, il serait bon de se poser les vraies questions pour notre propre plan\u00e8te. De Dakar \u00e0 Djibouti, une muraille verte pourquoi faire ? 11 pays africains s\u2019engagent pour freiner l\u2019avanc\u00e9e du d\u00e9sert et de la d\u00e9sertification au\u2026","rel":"","context":"Dans &quot;Solutions&quot;","block_context":{"text":"Solutions","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/solutions\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/07\/trace-grande-muraille-verte-sahara.jpg?fit=416%2C257&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":16123,"url":"https:\/\/www.laterredufutur.com\/accueil\/quand-le-sahara-etait-rempli-dherbe-darbres-et-dhommes\/","url_meta":{"origin":22984,"position":4},"title":"Quand le Sahara \u00e9tait rempli d&rsquo;herbe, d&rsquo;arbres et d&rsquo;Hommes","author":"Admin","date":"23 d\u00e9cembre 2017","format":false,"excerpt":"Il n\u2019y a que 6\u2009000 ans \u2014 qui \u00e0 l\u2019\u00e9chelle de l\u2019histoire de la Terre est presque n\u00e9gligeable \u2014 de la pluie tombait en abondance sur le nord du continent africain. Oui, il fut un temps o\u00f9 de la v\u00e9g\u00e9tation digne des jungles tropicales dominait ces espaces, aujourd\u2019hui parmi les\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/12\/afrique-sahara-vert.jpg?fit=750%2C375&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/12\/afrique-sahara-vert.jpg?fit=750%2C375&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/12\/afrique-sahara-vert.jpg?fit=750%2C375&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/12\/afrique-sahara-vert.jpg?fit=750%2C375&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":27288,"url":"https:\/\/www.laterredufutur.com\/accueil\/a-la-decouverte-du-sahara-vert-dans-le-desert-du-nord-du-tchad\/","url_meta":{"origin":22984,"position":5},"title":"\u00c0 la d\u00e9couverte du \u00ab Sahara vert \u00bb dans le d\u00e9sert du nord du Tchad","author":"Admin","date":"1 octobre 2025","format":false,"excerpt":"Un nuage de poussi\u00e8re s'\u00e9chappe d'un site de fouilles dans le sable du nord aride du Tchad, o\u00f9 les scientifiques recherchent des signes d'habitation humaine dans une zone autrefois humide et appel\u00e9e le \u00ab Sahara vert \u00bb. 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