{"id":6296,"date":"2026-05-07T08:20:42","date_gmt":"2026-05-07T07:20:42","guid":{"rendered":"https:\/\/lesminis.fr\/blog\/?p=6296"},"modified":"2026-05-10T19:26:01","modified_gmt":"2026-05-10T18:26:01","slug":"blob-organisme-sans-cerveau-intelligence","status":"publish","type":"post","link":"https:\/\/lesminis.fr\/blog\/blob-organisme-sans-cerveau-intelligence\/","title":{"rendered":"Le blob, l&rsquo;organisme sans cerveau qui d\u00e9fie l&rsquo;intelligence"},"content":{"rendered":"<p>Imaginez une cr\u00e9ature jaune vif, sans t\u00eate, sans cerveau, sans neurone. Une seule cellule, gigantesque, qui peut s&rsquo;\u00e9tendre sur plusieurs m\u00e8tres carr\u00e9s. Cette cr\u00e9ature existe vraiment. Elle s&rsquo;appelle le blob, ou <em>Physarum polycephalum<\/em> pour les scientifiques. Et elle remet en question tout ce que l&rsquo;on croyait savoir sur l&rsquo;intelligence du vivant.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/lesminis.fr\/blog\/blob-organisme-sans-cerveau-intelligence\/#Une_moisissure_visqueuse_pas_comme_les_autres\" >Une moisissure visqueuse pas comme les autres<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/lesminis.fr\/blog\/blob-organisme-sans-cerveau-intelligence\/#Le_metro_de_Tokyo_recree_en_26_heures\" >Le m\u00e9tro de Tokyo recr\u00e9\u00e9 en 26 heures<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/lesminis.fr\/blog\/blob-organisme-sans-cerveau-intelligence\/#Apprendre_sans_neurones\" >Apprendre sans neurones<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/lesminis.fr\/blog\/blob-organisme-sans-cerveau-intelligence\/#Une_question_derangeante\" >Une question d\u00e9rangeante<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/lesminis.fr\/blog\/blob-organisme-sans-cerveau-intelligence\/#Un_sujet_deveil_pour_les_enfants\" >Un sujet d&rsquo;\u00e9veil pour les enfants<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/lesminis.fr\/blog\/blob-organisme-sans-cerveau-intelligence\/#Sources_scientifiques\" >Sources scientifiques<\/a><\/li><\/ul><\/nav><\/div>\n<h3><span class=\"ez-toc-section\" id=\"Une_moisissure_visqueuse_pas_comme_les_autres\"><\/span>Une moisissure visqueuse pas comme les autres<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Le blob n&rsquo;est ni un animal, ni une plante, ni un champignon. C&rsquo;est un myxomyc\u00e8te, souvent d\u00e9crit comme une moisissure visqueuse. Dans sa phase active, dite plasmodiale, il forme une cellule unique mais \u00e0 plusieurs millions de noyaux, capable de ramper lentement sur les sols forestiers humides \u00e0 la recherche de bact\u00e9ries et de spores \u00e0 dig\u00e9rer.<\/p>\n<p>Sa biologie est d\u00e9j\u00e0 \u00e9trange en soi. Mais ce qui a captiv\u00e9 les scientifiques au cours des vingt derni\u00e8res ann\u00e9es, c&rsquo;est son comportement. Le blob fait des choses que l&rsquo;on associait spontan\u00e9ment aux organismes dot\u00e9s d&rsquo;un syst\u00e8me nerveux.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Le_metro_de_Tokyo_recree_en_26_heures\"><\/span>Le m\u00e9tro de Tokyo recr\u00e9\u00e9 en 26 heures<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>L&rsquo;exp\u00e9rience la plus c\u00e9l\u00e8bre date de 2010. Une \u00e9quipe japonaise et britannique dirig\u00e9e par Atsushi Tero et Toshiyuki Nakagaki, en collaboration avec l&rsquo;universit\u00e9 d&rsquo;Oxford, a publi\u00e9 dans la revue <em>Science<\/em> un r\u00e9sultat stup\u00e9fiant.<\/p>\n<p>Les chercheurs ont plac\u00e9 des flocons d&rsquo;avoine, nourriture pr\u00e9f\u00e9r\u00e9e du blob, aux emplacements correspondant aux principales villes de la r\u00e9gion de Tokyo. Au centre, un fragment de blob. L&rsquo;organisme s&rsquo;est \u00e9tendu dans toutes les directions, explorant. Puis, sur une p\u00e9riode d&rsquo;environ 26 heures, il a \u00e9limin\u00e9 les branches inefficaces de son r\u00e9seau pour stabiliser un trac\u00e9 optimal.<\/p>\n<p>Le r\u00e9sultat\u00a0: un r\u00e9seau aux propri\u00e9t\u00e9s comparables au r\u00e9seau ferroviaire de Tokyo, en termes de co\u00fbt, d&rsquo;efficacit\u00e9 de transport et de tol\u00e9rance aux pannes. Un syst\u00e8me d&rsquo;infrastructure que des ing\u00e9nieurs humains avaient mis des d\u00e9cennies \u00e0 concevoir, le blob l&rsquo;avait r\u00e9invent\u00e9 en moins de 30 heures, sans plan, sans architecte, sans cerveau.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Apprendre_sans_neurones\"><\/span>Apprendre sans neurones<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>L&rsquo;histoire ne s&rsquo;arr\u00eate pas l\u00e0. En 2016, Audrey Dussutour et son \u00e9quipe au CNRS de Toulouse ont d\u00e9montr\u00e9 que le blob est capable d&rsquo;apprendre. Expos\u00e9 \u00e0 un irritant inoffensif, comme la quinine ou la caf\u00e9ine, il finit par l&rsquo;ignorer apr\u00e8s plusieurs expositions r\u00e9p\u00e9t\u00e9es. Ce ph\u00e9nom\u00e8ne, appel\u00e9 habituation, est l&rsquo;une des formes les plus simples d&rsquo;apprentissage connues du r\u00e8gne animal. Sauf qu&rsquo;ici, il se produit sans aucun neurone.<\/p>\n<p>Plus surprenant encore\u00a0: la m\u00eame \u00e9quipe a publi\u00e9 quelques mois plus tard une seconde \u00e9tude montrant que deux blobs, lorsqu&rsquo;ils fusionnent, peuvent se transmettre l&rsquo;information apprise. Un blob habitu\u00e9 au sel transmet cette connaissance \u00e0 un blob na\u00eff au moment o\u00f9 leurs cellules se m\u00e9langent. C&rsquo;est une forme de m\u00e9moire chimique partag\u00e9e, sans cerveau ni synapse.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Une_question_derangeante\"><\/span>Une question d\u00e9rangeante<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Le blob nous force \u00e0 reposer une question fondamentale\u00a0: qu&rsquo;est-ce que l&rsquo;intelligence, exactement\u00a0?<\/p>\n<p>Si une cellule g\u00e9ante sans syst\u00e8me nerveux peut explorer son environnement, optimiser un r\u00e9seau, apprendre par exp\u00e9rience et m\u00eame transmettre cette exp\u00e9rience \u00e0 ses semblables, alors la fronti\u00e8re entre les organismes \u00ab\u00a0intelligents\u00a0\u00bb et le reste du vivant devient floue. La biologie red\u00e9couvre que la cognition n&rsquo;est peut-\u00eatre pas un privil\u00e8ge des animaux \u00e0 neurones, mais une propri\u00e9t\u00e9 plus ancienne, plus largement r\u00e9pandue, et bien moins exclusive qu&rsquo;on ne le pensait.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Un_sujet_deveil_pour_les_enfants\"><\/span>Un sujet d&rsquo;\u00e9veil pour les enfants<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Pour un enfant, le blob est une porte d&rsquo;entr\u00e9e fascinante vers les sciences du vivant. Il bouscule les cat\u00e9gories. Il montre que la nature ne se laisse pas enfermer dans les d\u00e9finitions des manuels. Et il invite \u00e0 observer, \u00e0 questionner, \u00e0 s&rsquo;\u00e9merveiller. Tout ce que nous cherchons \u00e0 transmettre chez Les Minis.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Sources_scientifiques\"><\/span>Sources scientifiques<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>Tero, Takagi, Saigusa, Ito, Bebber, Fricker, Yumiki, Kobayashi &amp; Nakagaki, <em>Science<\/em>, 2010.<\/li>\n<li>Boisseau, Vogel &amp; Dussutour, <em>Proceedings of the Royal Society B<\/em>, 2016.<\/li>\n<li>Vogel &amp; Dussutour, <em>Proceedings of the Royal Society B<\/em>, 2016.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Imaginez une cr\u00e9ature jaune vif, sans t\u00eate, sans cerveau, sans neurone. Une seule cellule, gigantesque, qui peut s&rsquo;\u00e9tendre sur plusieurs m\u00e8tres carr\u00e9s. Cette cr\u00e9ature existe vraiment. Elle s&rsquo;appelle le blob, ou Physarum polycephalum pour les scientifiques. Et elle remet en question tout ce que l&rsquo;on croyait savoir sur l&rsquo;intelligence du vivant. Une moisissure visqueuse pas [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":6297,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1600,28],"tags":[714,2562,2563,1013],"class_list":{"0":"post-6296","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-actualites-culture-et-curiosites","8":"category-monde-animal-figurines","9":"tag-biologie","10":"tag-curiosites-du-vivant","11":"tag-pedagogie-scientifique","12":"tag-sciences-naturelles"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Le blob : l&#039;organisme sans cerveau qui apprend et m\u00e9morise<\/title>\n<meta name=\"description\" content=\"D\u00e9couvrez le blob (Physarum polycephalum), une cellule g\u00e9ante sans neurones capable d&#039;apprendre, m\u00e9moriser et r\u00e9soudre des probl\u00e8mes complexes.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lesminis.fr\/blog\/blob-organisme-sans-cerveau-intelligence\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Le blob, l&#039;organisme sans cerveau qui d\u00e9fie l&#039;intelligence\" \/>\n<meta property=\"og:description\" content=\"D\u00e9couvrez le blob (Physarum polycephalum), une cellule g\u00e9ante sans neurones capable d&#039;apprendre, m\u00e9moriser et r\u00e9soudre des probl\u00e8mes complexes.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/lesminis.fr\/blog\/blob-organisme-sans-cerveau-intelligence\/\" \/>\n<meta property=\"og:site_name\" content=\"LesMinis Le Blog - 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