Un astrobiologiste sugg\u00e8re que les atterrisseurs Viking de la NASA auraient pu d\u00e9couvrir des formes de vie sur Mars en 1976, mais au lieu de cela, les ont d\u00e9truites. Cette affirmation controvers\u00e9e relance le d\u00e9bat sur les r\u00e9sultats \u00e9nigmatiques des exp\u00e9riences men\u00e9es par ces missions.<\/p>\n\n\n\n
Dirk Schulze-Makuch, astrobiologiste \u00e0 l’Universit\u00e9 technique de Berlin, a r\u00e9cemment propos\u00e9 que les atterrisseurs Viking de la\u00a0NASA\u00a0auraient pu \u00e9chantillonner de minuscules formes de\u00a0vie\u00a0r\u00e9sistantes \u00e0 la s\u00e9cheresse sur Mars. Selon lui, les tests effectu\u00e9s par les atterrisseurs les ont tu\u00e9 avant leur identification.<\/p>\n\n\n\n
Les atterrisseurs Viking ont men\u00e9 quatre exp\u00e9riences diff\u00e9rentes sur la plan\u00e8te rouge. Certaines ont montr\u00e9 des changements dans la concentration de certains\u00a0gaz, sugg\u00e9rant une forme de\u00a0m\u00e9tabolisme. Cependant, la plupart des scientifiques ont conclu que ces exp\u00e9riences n’avaient pas d\u00e9tect\u00e9 de vie martienne.<\/p>\n\n\n\n
Schulze-Makuch pense que les exp\u00e9riences ont peut-\u00eatre produit des r\u00e9sultats biais\u00e9s en utilisant trop d’eau. Dans des environnements tr\u00e8s secs sur\u00a0Terre, comme le\u00a0d\u00e9sert\u00a0d’Atacama au Chili, des microbes extr\u00eames peuvent survivre en se cachant dans des roches hygroscopiques. Ces roches sont \u00e9galement pr\u00e9sentes sur Mars.<\/p>\n\n\n\n
Alberto Fair\u00e9n, astrobiologiste \u00e0 l’Universit\u00e9 Cornell, soutient cette\u00a0th\u00e9orie. Il pense que l’ajout d’eau aux \u00e9chantillons de sol de Viking aurait pu tuer d’\u00e9ventuels microbes hygroscopiques.<\/p>\n","protected":false},"excerpt":{"rendered":"
Un astrobiologiste sugg\u00e8re que les atterrisseurs Viking de la NASA auraient pu d\u00e9couvrir des formes de vie sur Mars en<\/p>\n","protected":false},"author":1,"featured_media":21217,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[46],"tags":[],"class_list":["post-21216","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technology"],"_links":{"self":[{"href":"https:\/\/dekkbi.com\/index.php?rest_route=\/wp\/v2\/posts\/21216","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dekkbi.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dekkbi.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dekkbi.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dekkbi.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=21216"}],"version-history":[{"count":1,"href":"https:\/\/dekkbi.com\/index.php?rest_route=\/wp\/v2\/posts\/21216\/revisions"}],"predecessor-version":[{"id":21218,"href":"https:\/\/dekkbi.com\/index.php?rest_route=\/wp\/v2\/posts\/21216\/revisions\/21218"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dekkbi.com\/index.php?rest_route=\/wp\/v2\/media\/21217"}],"wp:attachment":[{"href":"https:\/\/dekkbi.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=21216"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dekkbi.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21216"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dekkbi.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21216"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}