{"id":41679,"date":"2026-02-22T12:00:00","date_gmt":"2026-02-22T12:00:00","guid":{"rendered":"https:\/\/www.africa-press.net\/madagascar\/politique\/bennu-contient-les-elements-essentiels-du-vivant"},"modified":"2026-02-22T18:27:04","modified_gmt":"2026-02-22T18:27:04","slug":"bennu-contient-les-elements-essentiels-du-vivant","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/bennu-contient-les-elements-essentiels-du-vivant","title":{"rendered":"Bennu Contient les \u00c9l\u00e9ments Essentiels du Vivant"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong>Africa-Press &#8211; Madagascar. <\/strong><\/span>Tous les ingre\u0301dients ne\u0301cessaires a\u0300 la fabrication de l\u2019ARN, mole\u0301cule essentielle au fonctionnement des cellules, sont de\u0301sormais identifie\u0301s dans les e\u0301chantillons de l\u2019aste\u0301roi\u0308de Bennu, rapporte\u0301s sur Terre en 2023.<\/p>\n<p><b>Une varie\u0301te\u0301 d\u2019e\u0301le\u0301ments lie\u0301s au de\u0301veloppement de la vie<\/b><\/p>\n<p>Il avait de\u0301ja\u0300 e\u0301te\u0301 de\u0301montre\u0301 que l\u2019objet rocheux contenait une varie\u0301te\u0301 d\u2019e\u0301le\u0301ments lie\u0301s au de\u0301veloppement de la vie: eau, sels, acides amine\u0301s, ainsi que les cinq bases azote\u0301es (ade\u0301nine, thymine, cytosine, guanine, uracile) composant l\u2019ADN et l\u2019ARN. Mais il manquait les sucres qui constituent le squelette de ces macromole\u0301cules \u2013 le de\u0301soxyribose pour l\u2019ADN, le ribose pour l\u2019ARN. Or ce dernier vient d\u2019e\u0302tre de\u0301cele\u0301 par des chercheurs japonais !<\/p>\n<p><b>Une preuve que l\u2019ARN se serait forme\u0301 avant l\u2019ADN<\/b><\/p>\n<p>Cette de\u0301couverte sugge\u0300re que des aste\u0301roi\u0308des auraient pu apporter sur Terre les e\u0301le\u0301ments propices a\u0300 l\u2019apparition de la vie. Elle renforce aussi l\u2019hypothe\u0300se que l\u2019ARN se serait forme\u0301 avant l\u2019ADN, puisque le de\u0301soxyribose n\u2019a pas e\u0301te\u0301 de\u0301tecte\u0301 dans les e\u0301chantillons.<\/p>\n<p><strong>Pour plus d&rsquo;informations et d&rsquo;analyses sur la <span style=\"color: #ff6600\">Madagascar<\/span>, suivez <span style=\"color: #ff6600\">Africa-Press<\/span><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; Madagascar. Tous les ingre\u0301dients ne\u0301cessaires a\u0300 la fabrication de l\u2019ARN, mole\u0301cule essentielle au fonctionnement des cellules, sont de\u0301sormais identifie\u0301s dans les e\u0301chantillons de l\u2019aste\u0301roi\u0308de Bennu, rapporte\u0301s sur Terre en 2023. Une varie\u0301te\u0301 d\u2019e\u0301le\u0301ments lie\u0301s au de\u0301veloppement de la vie Il avait de\u0301ja\u0300 e\u0301te\u0301 de\u0301montre\u0301 que l\u2019objet rocheux contenait une varie\u0301te\u0301 d\u2019e\u0301le\u0301ments lie\u0301s au [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":41678,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[49],"class_list":["post-41679","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-madagascar"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Bennu Contient les \u00c9l\u00e9ments Essentiels du Vivant - Madagascar<\/title>\n<meta name=\"description\" content=\"Tous les ingre\u0301dients ne\u0301cessaires a\u0300 la fabrication de l\u2019ARN, mole\u0301cule essentielle au fonctionnement des cellules, son ...\" \/>\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.africa-press.net\/madagascar\/toutes-les-actualites\/bennu-contient-les-elements-essentiels-du-vivant\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bennu Contient les \u00c9l\u00e9ments Essentiels du Vivant\" \/>\n<meta property=\"og:description\" content=\"Tous les ingre\u0301dients ne\u0301cessaires a\u0300 la fabrication de l\u2019ARN, mole\u0301cule essentielle au fonctionnement des cellules, son ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/bennu-contient-les-elements-essentiels-du-vivant\" \/>\n<meta property=\"og:site_name\" content=\"Madagascar\" \/>\n<meta property=\"article:published_time\" content=\"2026-02-22T12:00:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-22T18:27:04+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/madagascar\/sites\/56\/2026\/02\/sm_1771811959.631712.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"901\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"cfeditorfr\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"cfeditorfr\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/bennu-contient-les-elements-essentiels-du-vivant#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/bennu-contient-les-elements-essentiels-du-vivant\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/madagascar\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"Bennu Contient les \u00c9l\u00e9ments Essentiels du Vivant\",\"datePublished\":\"2026-02-22T12:00:00+00:00\",\"dateModified\":\"2026-02-22T18:27:04+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/bennu-contient-les-elements-essentiels-du-vivant\"},\"wordCount\":233,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/bennu-contient-les-elements-essentiels-du-vivant#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/madagascar\/sites\/56\/2026\/02\/sm_1771811959.631712.jpg\",\"keywords\":[\"Madagascar\"],\"articleSection\":[\"Divers\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/bennu-contient-les-elements-essentiels-du-vivant#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/bennu-contient-les-elements-essentiels-du-vivant\",\"url\":\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/bennu-contient-les-elements-essentiels-du-vivant\",\"name\":\"Bennu Contient les \u00c9l\u00e9ments Essentiels du Vivant - 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