{"id":821,"date":"2026-01-21T12:50:27","date_gmt":"2026-01-21T11:50:27","guid":{"rendered":"https:\/\/www.mcca-ain.org\/neanderthal\/?p=821"},"modified":"2026-01-21T12:58:30","modified_gmt":"2026-01-21T11:58:30","slug":"neandertal-et-homo-sapiens-un-ancetre-nord-africain","status":"publish","type":"post","link":"https:\/\/www.mcca-ain.org\/neanderthal\/2026\/01\/21\/neandertal-et-homo-sapiens-un-ancetre-nord-africain\/","title":{"rendered":"Il y a 773000 ans un anc\u00eatre nord africain \u00e0 Neandertal et Homo sapiens"},"content":{"rendered":"\n<p><strong>Apr\u00e8s plus d\u2019une d\u00e9cennie d\u2019incertitude, les hominin\u00e9s d\u00e9couverts \u00e0 la carri\u00e8re de Thomas, au Maroc, viennent d\u2019\u00eatre dat\u00e9s avec une pr\u00e9cision in\u00e9dite. \u00c2g\u00e9s de 773.000 ans, ces fossiles r\u00e9v\u00e8lent l\u2019existence d\u2019une lign\u00e9e africaine proche de l\u2019origine d\u2019Homo sapiens et relancent le d\u00e9bat sur les <a href=\"https:\/\/www.mcca-ain.org\/neanderthal\/2024\/12\/07\/un-garcon-de-six-ans-decouvre-une-hache-neandertalienne-vieille-de-60-000-ans-en-jouant-a-la-plage\/\">racines<\/a> de notre esp\u00e8ce, \u00e0 un moment cl\u00e9 de l\u2019\u00e9volution humaine.<\/strong><\/p>\n\n\n\n<p>Apr\u00e8s 14 ans de suspense, les premiers hominin\u00e9s de la carri\u00e8re de Thomas (d\u00e9j\u00e0 connue pour ses outils vieux de plus d&rsquo;un million\u00a0d&rsquo;ann\u00e9es)\u00a0\u00e0 Casablanca, au Maroc, r\u00e9v\u00e8lent une lign\u00e9e africaine proche de l&rsquo;origine d&rsquo;<em>Homo sapiens<\/em>, et possiblement aussi de celle de l&rsquo;anc\u00eatre commun \u00e0 notre esp\u00e8ce et \u00e0 celle de Neandertal<em>\u00a0(voir arbre).\u00a0<\/em>Les fossiles ont enfin \u00e9t\u00e9 dat\u00e9s avec pr\u00e9cision \u00e0\u00a0773.000 ans gr\u00e2ce \u00e0 un enregistrement magn\u00e9tostratigraphique haute r\u00e9solution capturant en d\u00e9tail la limite Brunhes\/Matuyama, soit la derni\u00e8re inversion majeure de la polarit\u00e9 g\u00e9omagn\u00e9tique.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u00ab\u00a0<em>La mandibule appartenait \u00e0 un <\/em>Homo erectus&nbsp;<em>tardif \u00e9volu\u00e9<\/em>\u00ab\u00a0<\/h2>\n\n\n\n<p>Cela a permis de mettre fin \u00e0 un myst\u00e8re, ou plut\u00f4t \u00e0 un flou scientifique, qui durait depuis 2008. Voire au-del\u00e0, si l&rsquo;on consid\u00e8re que la premi\u00e8re mandibule extraite dans \u00ab\u00a0la grotte aux hominid\u00e9s\u00a0\u00bb l&rsquo;a \u00e9t\u00e9 en 1970 et restait un objet de circonspection.<\/p>\n\n\n\n<p><img decoding=\"async\" loading=\"lazy\" width=\"1200\" height=\"900\" class=\"wp-image-822\" style=\"width: 400px;\" src=\"https:\/\/www.mcca-ain.org\/neanderthal\/wp-content\/uploads\/2026\/01\/mandibule-excavation_Maroc.jpg\" alt=\"mandibule-Maroc\" srcset=\"https:\/\/www.mcca-ain.org\/neanderthal\/wp-content\/uploads\/2026\/01\/mandibule-excavation_Maroc.jpg 1200w, https:\/\/www.mcca-ain.org\/neanderthal\/wp-content\/uploads\/2026\/01\/mandibule-excavation_Maroc-300x225.jpg 300w, https:\/\/www.mcca-ain.org\/neanderthal\/wp-content\/uploads\/2026\/01\/mandibule-excavation_Maroc-1024x768.jpg 1024w, https:\/\/www.mcca-ain.org\/neanderthal\/wp-content\/uploads\/2026\/01\/mandibule-excavation_Maroc-768x576.jpg 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/p>\n\n\n\n<p>Un enregistrement magn\u00e9tostratigraphique haute r\u00e9solution \u00e0 Thomas Quarry I, men\u00e9 par Serena Perini, de l&rsquo;Universit\u00e9 de Milan, a en effet captur\u00e9 l&rsquo;inversion du champ magn\u00e9tique Matuyama-Brunhes il y a environ 773.000 ans, fournissant l&rsquo;un des \u00e2ges les plus pr\u00e9cis pour un assemblage d&rsquo;hominid\u00e9s africains du Pl\u00e9istoc\u00e8ne (\u00e9poque g\u00e9ologique du\u00a0Quaternaire, s&rsquo;\u00e9tendant de\u00a02,58 millions d&rsquo;ann\u00e9es \u00e0 11.700 ans avant le pr\u00e9sent, marqu\u00e9e par des\u00a0glaciations).<\/p>\n\n\n\n<p>La datation des fossiles du Pl\u00e9istoc\u00e8ne inf\u00e9rieur et moyen est notoirement difficile, en raison de la discontinuit\u00e9 des stratigraphies ou de m\u00e9thodes entach\u00e9es d&rsquo;une grande incertitude. \u00ab\u00a0La <a href=\"https:\/\/www.mcca-ain.org\/neanderthal\/2022\/10\/15\/le-prix-nobel-de-medecine-2022-attribue-a-svante-paabo-pere-de-la-paleogenetique-et-decrypteur-du-genome-de-neandertal\/\">Grotte \u00e0 Hominid\u00e9s<\/a>\u00a0\u00bb de Casablanca est exceptionnelle car la s\u00e9dimentation rapide et le d\u00e9p\u00f4t continu ont permis aux scientifiques de capturer un signal magn\u00e9tique haute r\u00e9solution enregistr\u00e9 dans les s\u00e9diments avec un niveau de d\u00e9tail remarquable.<\/p>\n\n\n\n<p>Le champ magn\u00e9tique terrestre inverse sa polarit\u00e9 de mani\u00e8re \u00e9pisodique au cours des temps g\u00e9ologiques. Ces inversions pal\u00e9omagn\u00e9tiques se produisent dans le monde entier et presque instantan\u00e9ment \u00e0 l&rsquo;\u00e9chelle g\u00e9ologique, laissant dans les s\u00e9diments un signal net et synchronis\u00e9 \u00e0 l&rsquo;\u00e9chelle mondiale. La transition Matuyama-Brunhes (MBT), qui s&rsquo;est produite il y a environ 773 000 ans, est la plus r\u00e9cente de ces inversions majeures et constitue l&rsquo;un des marqueurs les plus pr\u00e9cis dont disposent les g\u00e9ologues et les arch\u00e9ologues<\/p>\n\n\n\n<p><img decoding=\"async\" loading=\"lazy\" width=\"453\" height=\"347\" class=\"wp-image-823\" style=\"width: 400px;\" src=\"https:\/\/www.mcca-ain.org\/neanderthal\/wp-content\/uploads\/2026\/01\/neanderthal-sapiens-arbre-divergeance.jpg\" alt=\"arbre Neanderthal\/Homo-Sapiens\" srcset=\"https:\/\/www.mcca-ain.org\/neanderthal\/wp-content\/uploads\/2026\/01\/neanderthal-sapiens-arbre-divergeance.jpg 453w, https:\/\/www.mcca-ain.org\/neanderthal\/wp-content\/uploads\/2026\/01\/neanderthal-sapiens-arbre-divergeance-300x230.jpg 300w\" sizes=\"(max-width: 453px) 100vw, 453px\" \/> <br>C&rsquo;est ainsi qu&rsquo;a pu \u00eatre r\u00e9solue l&rsquo;\u00e9nigme : la plus belle des mandibules, celle d&rsquo;un\u00a0adulte, avait \u00e9t\u00e9 d\u00e9couverte d\u00e8s\u00a02008 par le pr\u00e9historien et arch\u00e9ologue Jean-Paul Raynal (CNRS\/Universit\u00e9 de Bordeaux),\u00a0\u00ab\u00a0<em>mais faute d&rsquo;une datation correcte, il \u00e9tait difficile de l&rsquo;interpr\u00e9ter<\/em>\u00ab\u00a0, explique \u00e0 <em>Sciences et Avenir<\/em> le professeur au Coll\u00e8ge de France Jean-Jacques Hublin, appel\u00e9 \u00e0 l&rsquo;\u00e9tude des restes humains, qui poursuit :\u00a0\u00ab\u00a0<em>Elle appartenait \u00e0 un <\/em>Homo erectus\u00a0<em>tardif \u00e9volu\u00e9<\/em>\u00ab\u00a0, situ\u00e9 pr\u00e8s de la racine de notre lign\u00e9e.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><em>\u00ab\u00a0L&rsquo;Afrique du Nord-Ouest semble avoir jou\u00e9 un r\u00f4le cl\u00e9 dans l&rsquo;expansion du genre Homo\u00a0\u00bb<\/em><\/h2>\n\n\n\n<p>Les mandibules et autres restes, dont des vert\u00e8bres de cou et des dents isol\u00e9es, montrent une mosa\u00efque de traits archa\u00efques et d\u00e9riv\u00e9s compatibles avec une population africaine s\u0153ur de l&rsquo;<em>Homo antecessor&nbsp;<\/em>(d\u00e9couvert en Espagne et vieux d&rsquo;environ&nbsp;800.000 ans), \u00ab\u00a0<em>pr\u00e8s de la divergence des lign\u00e9es d&rsquo;hominid\u00e9s eurasiens et africains du Pl\u00e9istoc\u00e8ne moyen<\/em>\u00ab\u00a0. Apr\u00e8s la d\u00e9couverte d&rsquo;<em>Homo antecessor <\/em>entre 1994 et 1995, quelques voix estimaient que la lign\u00e9e n\u00e9andertalienne, voire celle<em> d&rsquo;Homo&nbsp;sapiens,&nbsp;<\/em>avaient pu na\u00eetre en Europe ou Eurasie.<\/p>\n\n\n\n<p>Les fossiles du Maroc relancent la donne.<em>\u00a0\u00ab\u00a0L&rsquo;Afrique du Nord-Ouest semble avoir jou\u00e9 un r\u00f4le cl\u00e9 dans l&rsquo;expansion du genre Homo\u00a0\u00bb e<\/em>stiment les signataires du papier paru dans <em>Nature<\/em>. Des d\u00e9cennies de recherches franco-marocaines dans les formations c\u00f4ti\u00e8res de Casablanca r\u00e9v\u00e8lent une s\u00e9quence de grottes et de tani\u00e8res de carnivores pr\u00e9serv\u00e9s de mani\u00e8re unique et soulignent l&rsquo;importance de la r\u00e9gion dans l&rsquo;\u00e9volution pr\u00e9coce de\u00a0nos anc\u00eatres.<\/p>\n\n\n\n<p>__<br><em>source: <a href=\"https:\/\/www.sciencesetavenir.fr\/archeo-paleo\/paleontologie\/au-maroc-decouverte-d-un-ancetre-commun-d-homo-sapiens-et-de-neandertal-vieux-de-773-000-ans_190311\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.sciencesetavenir.fr\/archeo-paleo\/paleontologie\/au-maroc-decouverte-d-un-ancetre-commun-d-homo-sapiens-et-de-neandertal-vieux-de-773-000-ans_190311<\/a><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Apr\u00e8s plus d\u2019une d\u00e9cennie d\u2019incertitude, les hominin\u00e9s d\u00e9couverts \u00e0 la carri\u00e8re de Thomas, au Maroc, viennent d\u2019\u00eatre dat\u00e9s avec une pr\u00e9cision in\u00e9dite. \u00c2g\u00e9s de 773.000 ans, ces fossiles r\u00e9v\u00e8lent l\u2019existence d\u2019une lign\u00e9e africaine proche de l\u2019origine d\u2019Homo sapiens et relancent le d\u00e9bat sur les racines de notre esp\u00e8ce, \u00e0 un moment cl\u00e9 de l\u2019\u00e9volution humaine. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[19],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.8.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Il y a 773000 ans un anc\u00eatre nord africain \u00e0 Neandertal et Homo sapiens - Neanderthal.blog<\/title>\n<meta name=\"description\" content=\"Apr\u00e8s plus d\u2019une d\u00e9cennie d\u2019incertitude, les hominin\u00e9s d\u00e9couverts au Maroc, viennent d\u2019\u00eatre dat\u00e9s avec une pr\u00e9cision in\u00e9dite. \u00c2g\u00e9s de 773.000 ans, ces fossiles r\u00e9v\u00e8lent l\u2019existence d\u2019une lign\u00e9e africaine commune \u00e0 Homo sapiens et N\u00e9anderthal\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.mcca-ain.org\/neanderthal\/2026\/01\/21\/neandertal-et-homo-sapiens-un-ancetre-nord-africain\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Il y a 773000 ans un anc\u00eatre nord africain \u00e0 Neandertal et Homo sapiens - 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