{"id":54118,"date":"2026-02-21T18:00:58","date_gmt":"2026-02-21T18:00:58","guid":{"rendered":"https:\/\/www.africa-press.net\/congo-brazzaville\/politique\/bennu-contient-les-elements-essentiels-du-vivant"},"modified":"2026-02-21T18:42:50","modified_gmt":"2026-02-21T18:42:50","slug":"bennu-contient-les-elements-essentiels-du-vivant","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/congo-brazzaville\/toutes-les-actualites\/bennu-contient-les-elements-essentiels-du-vivant","title":{"rendered":"Bennu Contient Les \u00c9l\u00e9ments Essentiels Du Vivant"},"content":{"rendered":"<p><span class=\"ap-article-header-tag\"> <strong>Africa-Press &#8211; Congo Brazzaville. <\/strong> <\/span>Tous les ingre\u0301dients ne\u0301cessaires a\u0300 la fabrication de l&rsquo;ARN, mole\u0301cule essentielle au fonctionnement des cellules, sont de\u0301sormais identifie\u0301s dans les e\u0301chantillons de l&rsquo;aste\u0301roi\u0308de Bennu, rapporte\u0301s sur Terre en 2023.<\/p>\n<p><b>Une varie\u0301te\u0301 d&rsquo;e\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&rsquo;objet rocheux contenait une varie\u0301te\u0301 d&rsquo;e\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&rsquo;ADN et l&rsquo;ARN. Mais il manquait les sucres qui constituent le squelette de ces macromole\u0301cules &#8211; le de\u0301soxyribose pour l&rsquo;ADN, le ribose pour l&rsquo;ARN. Or ce dernier vient d&rsquo;e\u0302tre de\u0301cele\u0301 par des chercheurs japonais !<\/p>\n<p><b>Une preuve que l&rsquo;ARN se serait forme\u0301 avant l&rsquo;ADN<\/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&rsquo;apparition de la vie. Elle renforce aussi l&rsquo;hypothe\u0300se que l&rsquo;ARN se serait forme\u0301 avant l&rsquo;ADN, puisque le de\u0301soxyribose n&rsquo;a pas e\u0301te\u0301 de\u0301tecte\u0301 dans les e\u0301chantillons.<\/p>\n<p class=\"ap-article-footer-note\">Retrouvez plus d\u2019actualit\u00e9s et d\u2019analyses sur <span class=\"ap-highlight-country\">Congo Brazzaville<\/span> sur le site <span class=\"ap-highlight-brand\">Africa Press<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; Congo Brazzaville. Tous les ingre\u0301dients ne\u0301cessaires a\u0300 la fabrication de l&rsquo;ARN, mole\u0301cule essentielle au fonctionnement des cellules, sont de\u0301sormais identifie\u0301s dans les e\u0301chantillons de l&rsquo;aste\u0301roi\u0308de Bennu, rapporte\u0301s sur Terre en 2023. Une varie\u0301te\u0301 d&rsquo;e\u0301le\u0301ments lie\u0301s au de\u0301veloppement de la vie Il avait de\u0301ja\u0300 e\u0301te\u0301 de\u0301montre\u0301 que l&rsquo;objet rocheux contenait une varie\u0301te\u0301 d&rsquo;e\u0301le\u0301ments lie\u0301s [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":54116,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[46],"class_list":["post-54118","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-congo-brazzaville"],"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 - Congo Brazzaville<\/title>\n<meta name=\"description\" content=\"-article-header-tag&quot;&gt; Africa-Press - Congo Brazzaville. Tous les ingre\u0301dients ...\" \/>\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\/congo-brazzaville\/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=\"-article-header-tag&quot;&gt; Africa-Press - Congo Brazzaville. 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