{"id":5134,"date":"2019-07-05T10:26:02","date_gmt":"2019-07-05T08:26:02","guid":{"rendered":"https:\/\/www.greenpeace.org\/luxembourg\/?p=5134"},"modified":"2021-12-01T17:30:00","modified_gmt":"2021-12-01T15:30:00","slug":"la-vie-sur-terre-a-t-elle-commence-en-eau-profonde","status":"publish","type":"post","link":"https:\/\/www.greenpeace.org\/luxembourg\/fr\/actualites\/5134\/la-vie-sur-terre-a-t-elle-commence-en-eau-profonde\/","title":{"rendered":"La vie sur terre a-t-elle commenc\u00e9 en eau profonde ?"},"content":{"rendered":"<div class=\"meta\">\n<p class=\"chapo\"><strong><em>Apr\u00e8s son d\u00e9part de Londres en avril et une premi\u00e8re escale en Arctique, l&#8217;Esperanza se trouve d\u00e9sormais dans l&#8217;Atlantique Nord. A son bord, des scientifiques nous aideront \u00e0 d\u00e9crypter les myst\u00e8res qui se cachent derri\u00e8re Lost City.<\/em><\/strong><\/p>\n<\/div>\n<section class=\"accordion-box\">Lorsqu\u2019il s\u2019agit de parler de cr\u00e9atures \u00e9tranges aux allures extraterrestres, presque sorties d\u2019un film de science-fiction, l\u2019oc\u00e9an est une source d\u2019inspiration intarissable\u00a0:\u00a0<a href=\"https:\/\/www.worldatlas.com\/articles\/giant-isopod-facts-animals-of-the-oceans.html\" target=\"_blank\" rel=\"noopener noreferrer\">isopodes g\u00e9ants<\/a>, poisson-globes,\u00a0<a href=\"https:\/\/www.nationalgeographic.fr\/animaux\/decouverte-dune-nouvelle-espece-de-crabe-yeti-velu-en-antarctique\" target=\"_blank\" rel=\"noopener noreferrer\">le kiwa tyleri<\/a>\u00a0(un homard aux pinces poilues), et bien plus encore. Pas surprenant qu\u2019Hollywood choisisse r\u00e9guli\u00e8rement de scruter le fond de l\u2019oc\u00e9an pour inventer toujours plus de monstres et de paysages myst\u00e9rieux.<\/p>\n<p>La surface de la lune est mieux document\u00e9e que le plancher oc\u00e9anique. Pourtant, d\u2019apr\u00e8s certains scientifiques, c\u2019est l\u00e0 que la vie sur Terre aurait commenc\u00e9.<\/p>\n<div id=\"attachment_5136\" style=\"width: 1034px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-5136\" class=\"size-large wp-image-5136\" src=\"https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2019\/07\/f36280fe-gp01g27-1024x747.jpg\" alt=\"Vers turbicoles\" width=\"1024\" height=\"747\" srcset=\"https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2019\/07\/f36280fe-gp01g27-1024x747.jpg 1024w, https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2019\/07\/f36280fe-gp01g27-300x219.jpg 300w, https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2019\/07\/f36280fe-gp01g27-768x560.jpg 768w, https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2019\/07\/f36280fe-gp01g27-466x340.jpg 466w, https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2019\/07\/f36280fe-gp01g27.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><p id=\"caption-attachment-5136\" class=\"wp-caption-text\">Vers turbicoles.<\/p><\/div>\n<h2>La d\u00e9couverte des chemin\u00e9es hydrothermales<\/h2>\n<p>Les chemin\u00e9es hydrothermales\u00a0apparaissent l\u00e0 o\u00f9 les plaques tectoniques se rencontrent et permettent d\u2019\u00e9vacuer une partie de la chaleur de la Terre. La lumi\u00e8re du jour n\u2019atteint pas ces \u00e9vents qui se forment \u00e0 des profondeurs compl\u00e8tement d\u00e9pourvues d\u2019oxyg\u00e8ne.<\/p>\n<p>C\u2019est seulement en 1977 que les chemin\u00e9es hydrothermales ont \u00e9t\u00e9 d\u00e9couvertes. Elles n\u2019ont pas manqu\u00e9 d\u2019\u00e9tonner les scientifiques par leur taille, mais aussi par la diversit\u00e9 des esp\u00e8ces vivant aux alentours. Des vers marins g\u00e9ants (les\u00a0<em>siboglinidae<\/em>), des crabes se nourrissant de bact\u00e9ries, et d\u2019autres cr\u00e9atures surr\u00e9alistes prosp\u00e8rent miraculeusement dans ces profondeurs, agglutin\u00e9es autour de colonnes d\u2019eau chaude riches en min\u00e9raux.<\/p>\n<p>Cette d\u00e9couverte a remis en question tout ce que tout le monde a toujours pens\u00e9 des origines de la vie sur Terre.<\/p>\n<div id=\"attachment_5139\" style=\"width: 1034px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-5139\" class=\"size-large wp-image-5139\" src=\"https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2019\/07\/7d150aa5-gp0stt5m8-1024x556.jpg\" alt=\"Chemin\u00e9e hydrothermale de Lost City.\" width=\"1024\" height=\"556\" srcset=\"https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2019\/07\/7d150aa5-gp0stt5m8-1024x556.jpg 1024w, https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2019\/07\/7d150aa5-gp0stt5m8-300x163.jpg 300w, https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2019\/07\/7d150aa5-gp0stt5m8-768x417.jpg 768w, https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2019\/07\/7d150aa5-gp0stt5m8-510x277.jpg 510w, https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2019\/07\/7d150aa5-gp0stt5m8.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><p id=\"caption-attachment-5139\" class=\"wp-caption-text\">Chemin\u00e9e hydrothermale de Lost City.<\/p><\/div>\n<h2><em>Lost City<\/em>\u00a0: la vraie soupe primordiale ?<\/h2>\n<p><em>Lost City<\/em>\u00a0(la Cit\u00e9 perdue) est le site le plus connu de chemin\u00e9es hydrothermales. On y trouve des tourelles, des tours et des chemin\u00e9es dont certaines ont plus de 120\u00a0000 ans\u00a0!<\/p>\n<p>Des recherches ont montr\u00e9 que ces \u00e9vents g\u00e9n\u00e9raient des hydrocarbures, des mol\u00e9cules essentielles \u00e0 toute vie sur Terre, qui se forment par le simple contact de l\u2019eau de mer avec les roches et minerais pr\u00e9sents sur le site de\u00a0<em>Lost City<\/em>. Est-ce que ce m\u00e9lange de min\u00e9raux et d\u2019eau sal\u00e9e \u00e0 haute temp\u00e9rature, tel que cela existe \u00e0\u00a0<em>Lost City<\/em>, est \u00e0 l\u2019origine de tout\u00a0? Est-ce l\u2019authentique\u00a0<a href=\"https:\/\/www.aquaportail.com\/definition-1465-soupe-primitive.html\" target=\"_blank\" rel=\"noopener noreferrer\">soupe primordiale<\/a>\u00a0(ou soupe primitive)\u00a0?<\/p>\n<p>En toute franchise, nous ne le savons toujours pas. Ces 20\u00a0derni\u00e8res ann\u00e9es, des scientifiques ont travaill\u00e9 d\u2019arrache-pied pour confirmer (ou non) cette th\u00e9orie et d\u00e9crypter les myst\u00e8res de\u00a0<em>Lost City<\/em>. Alors qu\u2019on attend encore des r\u00e9ponses \u00e0 ces questions, le plancher oc\u00e9anique commence \u00e0 attirer l\u2019attention des industriels avides de min\u00e9raux et de m\u00e9taux stock\u00e9s en eaux profondes,\u00a0<a href=\"https:\/\/www.actu-environnement.com\/ae\/news\/abysse-minerais-nodules-polymetalliques-marins-cuivre-nickel-cobalt-ressources-15430.php4\" target=\"_blank\" rel=\"noopener noreferrer\">comme les nodules polym\u00e9talliques<\/a>\u00a0(riches en cuivre, nickel, cobalt\u2026), des minerais rares servant \u00e0 la fabrication des \u00e9crans de t\u00e9l\u00e9phones, ordinateurs, etc.<\/p>\n<h2>\u201c<em>Monster machines<\/em>\u201d dans les starting blocks<\/h2>\n<p>Nous ne savons pas grand-chose du plancher oc\u00e9anique. Nous en savons encore moins lorsqu\u2019il s\u2019agit d\u2019endroits recul\u00e9s et hostiles. Bien que ces \u00e9cosyst\u00e8mes semblent \u00e0 premi\u00e8re vue extr\u00eamement r\u00e9silients, ils s\u2019av\u00e8rent aussi fragiles et pr\u00e9cieux. Malheureusement, ils sont d\u00e9j\u00e0 menac\u00e9s par l\u2019extraction mini\u00e8re en eaux profondes.<\/p>\n<div id=\"attachment_5142\" style=\"width: 1034px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-5142\" class=\"size-large wp-image-5142\" src=\"https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2019\/07\/a71601ff-gp0fd2-1024x681.jpg\" alt=\"M\u00e9duse p\u00e9lagique (Pelagia noctiluca)\" width=\"1024\" height=\"681\" srcset=\"https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2019\/07\/a71601ff-gp0fd2-1024x681.jpg 1024w, https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2019\/07\/a71601ff-gp0fd2-300x200.jpg 300w, https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2019\/07\/a71601ff-gp0fd2-768x511.jpg 768w, https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2019\/07\/a71601ff-gp0fd2-510x340.jpg 510w, https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2019\/07\/a71601ff-gp0fd2.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><p id=\"caption-attachment-5142\" class=\"wp-caption-text\">M\u00e9duse p\u00e9lagique (Pelagia noctiluca)<\/p><\/div>\n<p>Bien que l\u2019exploration mini\u00e8re en eaux profondes n\u2019ait pas encore commenc\u00e9, des autorisations ont d\u00e9j\u00e0 \u00e9t\u00e9 d\u00e9livr\u00e9es \u00e0 plusieurs \u00c9tats, structures publiques et industriels pour une exploitation commerciale. Elle s\u2019effectue avec\u00a0<a href=\"https:\/\/www.vice.com\/fr\/article\/pg3ywv\/la-prochaine-rue-vers-lor-se-droulera--1500-mtres-sous-la-surface-\" target=\"_blank\" rel=\"noopener noreferrer\">des machines monstrueuses<\/a>\u00a0qui labourent le plancher oc\u00e9anique et d\u00e9truisent tout sur leur passage, avant m\u00eame que nous puissions comprendre l\u2019importance de ces endroits.<\/p>\n<p><a href=\"https:\/\/storage.googleapis.com\/planet4-international-stateless\/2019\/06\/f223a588-in-deep-water-greenpeace-deep-sea-mining-2019.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">Un rapport de Greenpeace sur le sujet paru aujourd\u2019hui (en anglais)<\/a>\u00a0r\u00e9v\u00e8le que les industriels sont parfaitement conscients que leur activit\u00e9 pourrait conduire \u00e0 la disparition de certaines esp\u00e8ces uniques. Ce rapport appelle \u00e9galement les gouvernements \u00e0 se mettre d\u2019accord pour adopter un trait\u00e9 mondial pour les oc\u00e9ans qui devra donner la priorit\u00e9 \u00e0 la protection des oc\u00e9ans, et non \u00e0 leur exploitation.<\/p>\n<h2>L\u2019heure est \u00e0 la prise de conscience<\/h2>\n<div id=\"attachment_5145\" style=\"width: 1034px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-5145\" class=\"size-large wp-image-5145\" src=\"https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2019\/07\/548f958b-gp0stt5m9-1024x552.jpg\" alt=\"Chemin\u00e9e hydrothermale de Lost City.\" width=\"1024\" height=\"552\" srcset=\"https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2019\/07\/548f958b-gp0stt5m9-1024x552.jpg 1024w, https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2019\/07\/548f958b-gp0stt5m9-300x162.jpg 300w, https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2019\/07\/548f958b-gp0stt5m9-768x414.jpg 768w, https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2019\/07\/548f958b-gp0stt5m9-510x275.jpg 510w, https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2019\/07\/548f958b-gp0stt5m9.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><p id=\"caption-attachment-5145\" class=\"wp-caption-text\">Chemin\u00e9e hydrothermale de Lost City.<\/p><\/div>\n<p>La pr\u00e9cipitation des groupes miniers pour exploiter les fonds sous-marins doit nous pousser \u00e0 agir. Les citoyen.ne.s ne sont pas pr\u00eat.e.s \u00e0 laisser le plancher oc\u00e9anique se faire massacrer pour produire toujours plus de nouveaux gadgets.<\/p>\n<p>Pour cette raison,\u00a0l\u2019exp\u00e9dition #ProtectTheOceans\u00a0fera une escale \u00e0\u00a0<em>Lost City<\/em>\u00a0d\u2019ici quelques jours avec, \u00e0 bord de l\u2019<em>Esperanza<\/em>, les scientifiques qui ont d\u00e9couvert cette merveille. Ils nous aideront \u00e0 en savoir plus et tenteront de d\u00e9chiffrer les \u00e9nigmes qui entourent cette cit\u00e9 perdue. En renfor\u00e7ant nos connaissances, nous serons mieux \u00e0 m\u00eame d\u2019appeler \u00e0 la protection de cette zone.<\/p>\n<p>Vous l\u2019avez compris\u00a0: il y a encore beaucoup de choses que nous ne savons pas \u00e0 propos de\u00a0<em>Lost City<\/em>. En revanche, ce dont nous sommes certains, c\u2019est que les activit\u00e9s humaines d\u00e9t\u00e9riorent d\u00e9j\u00e0 cet \u00e9cosyst\u00e8me vitesse grand\u00a0V.<\/p>\n<p>&nbsp;<\/p>\n<\/section>\n<p><a href=\"https:\/\/www.greenpeace.fr\/la-vie-sur-terre-a-t-elle-commence-en-eau-profonde\/\"><em><strong>Article Source :<\/strong> <\/em><\/a>Greenpeace France<\/p>\n\t\t\t<section\n\t\t\tclass=\"boxout post-396 \"\n\t\t\t\n\t\t>\n\t\t\t<a\n\t\t\t\tdata-ga-category=\"Take Action Boxout\"\n\t\t\t\tdata-ga-action=\"Image\"\n\t\t\t\tdata-ga-label=\"n\/a\"\n\t\t\t\tclass=\"cover-card-overlay\"\n\t\t\t\thref=\"https:\/\/www.greenpeace.org\/luxembourg\/fr\/agir\/adherer-a-greenpeace\/\" \n\t\t\t><\/a>\n\t\t\t\t\t\t\t<img\n\t\t\t\t\t\tsrc=\"https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2020\/04\/99eaaf9b-gp04tdo-1024x683.jpg\"\n\t\t\t\t\t\tsrcset=\"https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2020\/04\/99eaaf9b-gp04tdo-300x200.jpg 300w, https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2020\/04\/99eaaf9b-gp04tdo-1024x683.jpg 1024w, https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2020\/04\/99eaaf9b-gp04tdo-768x512.jpg 768w, https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2020\/04\/99eaaf9b-gp04tdo-510x340.jpg 510w, https:\/\/www.greenpeace.org\/static\/planet4-luxembourg-stateless\/2020\/04\/99eaaf9b-gp04tdo.jpg 1200w\"\n\t\t\t\t\t\tsizes=\"(min-width: 1000px) 358px, (min-width: 780px) 313px, 88px\"\n\t\t\t\t\t\talt=\"Tundra in Alaska. \u00a9 Markus Mauthe \/ Greenpeace\" title=\"Tundra in Alaska. \u00a9 Markus Mauthe \/ Greenpeace\"\n\t\t\t\t\/>\n            \t\t\t<div class=\"boxout-content\">\n\t\t\t\t\t\t\t\t\t<a\n\t\t\t\t\t\tclass=\"boxout-heading medium\"\n\t\t\t\t\t\tdata-ga-category=\"Take Action Boxout\"\n\t\t\t\t\t\tdata-ga-action=\"Title\"\n\t\t\t\t\t\tdata-ga-label=\"n\/a\"\n\t\t\t\t\t\thref=\"https:\/\/www.greenpeace.org\/luxembourg\/fr\/agir\/adherer-a-greenpeace\/\"\n\t\t\t\t\t\t\n\t\t\t\t\t>\n\t\t\t\t\t\tDevenir Adh\u00e9rent\u00b7e\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<p class=\"boxout-excerpt\">Donnez vie \u00e0 vos id\u00e9aux : votre don nous permet d&#8217;agir au Luxembourg et partout dans le monde !<\/p>\n\t\t\t\t                                    <a\n                        class=\"btn btn-primary\"\n                        data-ga-category=\"Take Action Boxout\"\n                        data-ga-action=\"Call to Action\"\n                        data-ga-label=\"n\/a\"\n                        href=\"https:\/\/www.greenpeace.org\/luxembourg\/fr\/agir\/adherer-a-greenpeace\/\"\n                        \n                    >\n                        S&#039;engager\n                    <\/a>\n                \t\t\t<\/div>\n\t\t\t\t\t<\/section>\n\t","protected":false},"excerpt":{"rendered":"<p>Apr\u00e8s son d\u00e9part de Londres en avril et une premi\u00e8re escale en Arctique, l&#8217;Esperanza se trouve d\u00e9sormais dans l&#8217;Atlantique Nord. A son bord, des scientifiques nous aideront \u00e0 d\u00e9crypter les&hellip;<\/p>\n","protected":false},"author":18,"featured_media":5142,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ep_exclude_from_search":false,"p4_og_title":"","p4_og_description":"","p4_og_image":"","p4_og_image_id":"","p4_seo_canonical_url":"","p4_campaign_name":"","p4_local_project":"","p4_basket_name":"","p4_department":"","footnotes":""},"categories":[43],"tags":[29,38],"p4-page-type":[85],"class_list":["post-5134","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nature","tag-oceans","tag-biodiversite","p4-page-type-actualites"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.9 (Yoast SEO v23.9) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>La vie sur terre a-t-elle commenc\u00e9 en eau profonde ? - Greenpeace Luxembourg<\/title>\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.greenpeace.org\/luxembourg\/fr\/actualites\/5134\/la-vie-sur-terre-a-t-elle-commence-en-eau-profonde\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La vie sur terre a-t-elle commenc\u00e9 en eau profonde ?\" \/>\n<meta property=\"og:description\" content=\"Apr\u00e8s son d\u00e9part de Londres en avril et une premi\u00e8re escale en Arctique, l&#8217;Esperanza se trouve d\u00e9sormais dans l&#8217;Atlantique Nord. 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