\nOamenii de \u015ftiin\u0163\u0103 de la NASA au anun\u0163at o descoperire major\u0103 care ar putea apropia omenirea mai mult ca oric\u00e2nd de r\u0103spunsul la \u00eentrebarea dac\u0103 via\u0163a a existat vreodat\u0103 pe Marte, potrivit Earth. Noile rezultate ob\u0163inute din analiza unui e\u015fantion de roc\u0103 mar\u0163ian\u0103, studiat de roverul Perseverance, scot la iveal\u0103 caracteristici chimice \u015fi structurale str\u00e2ns asociate cu activitatea microbian\u0103 pe P\u0103m\u00e2nt.<\/p>\n
\nDescoperirea provine dintr-un nucleu de roc\u0103 sedimentar\u0103 forat de roverul Perseverance \u00een iulie 2024, \u00eentr-o zon\u0103 numit\u0103 Bright Angel, din interiorul craterului Jezero. Roca s-a format \u00eentr-un sistem fluvial antic care alimenta c\u00e2ndva un lac disp\u0103rut de mult timp.<\/p>\n
\nCercet\u0103torii au identificat minerale \u015fi texturi care, pe P\u0103m\u00e2nt, apar frecvent \u00een medii s\u0103race \u00een oxigen, bogate \u00een ap\u0103, modelate de procese microbiene. Printre acestea se num\u0103r\u0103 tipare repetitive de tip \u201epete de leopard\u201d \u015fi noduli forma\u0163i prin reac\u0163ii chimice la temperaturi relativ sc\u0103zute, condi\u0163ii compatibile cu existen\u0163a vie\u0163ii.<\/p>\n
\nDou\u0103 minerale au atras aten\u0163ia cercet\u0103torilor: vivianitul, un fosfat de fier, \u015fi greigitul, o sulfur\u0103 de fier. Pe P\u0103m\u00e2nt, ambele sunt adesea legate de metabolismul microbian care implic\u0103 ciclurile fierului \u015fi sulfului.<\/p>\n
\nDispunerea acestor minerale \u00een e\u015fantionul mar\u0163ian reflect\u0103 \u00eendeaproape tipare create de microbi vii \u00een sedimentele terestre.<\/p>\n
\nAutorul principal al studiului, Joel Hurowitz de la Universitatea Stony Brook, a subliniat c\u0103 chimia observat\u0103 este compatibil\u0103 cu medii capabile s\u0103 sus\u0163in\u0103 via\u0163a, chiar dac\u0103 r\u0103m\u00e2n posibile explica\u0163ii non-biologice.<\/p>\n
\nFostul administrator NASA, Sean Duffy, a descris descoperirea drept cel mai apropiat moment de identificarea unei poten\u0163iale semn\u0103turi ale vie\u0163ii pe Marte.<\/p>\n
\nCercet\u0103torii NASA insist\u0103 c\u0103 descoperirea nu confirm\u0103 existen\u0163a vie\u0163ii, ci reprezint\u0103 un pas timpuriu pe scara Confidence of Life Detection a agen\u0163iei.<\/p>\n
\nAlte explica\u0163ii, precum reac\u0163ii chimice independente de biologie sau materiale organice aduse de meteori\u0163i, trebuie \u00eenc\u0103 eliminate.<\/p>\n
\nNucleul de roc\u0103 sigilat ar putea fi supus unor analize mult mai avansate dac\u0103 va fi adus pe P\u0103m\u00e2nt, inclusiv studii izotopice \u015fi microscopice capabile s\u0103 disting\u0103 activitatea biologic\u0103 de procesele pur chimice.<\/p>\n
\nStudiul, publicat \u00een revista Nature, schimb\u0103 modul \u00een care este privit Marte ca planet\u0103 care a g\u0103zduit c\u00e2ndva o chimie complex\u0103, favorabil\u0103 vie\u0163ii.<\/p>\n","protected":false},"excerpt":{"rendered":"
NASA anun\u0163\u0103 c\u0103 analiza unui e\u015fantion de roc\u0103 de pe Marte indic\u0103 posibile semn\u0103turi ale vie\u0163ii, cele mai solide dovezi de p\u00e2n\u0103 acum ale existen\u0163ei microbiene antice.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[510],"tags":[62288,62290,62289],"class_list":["post-243794","post","type-post","status-publish","format-standard","hentry","category-actualitate","tag-descoperire-nasa","tag-rover-perseverance","tag-viata-pe-marte"],"_links":{"self":[{"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/posts\/243794","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=243794"}],"version-history":[{"count":0,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/posts\/243794\/revisions"}],"wp:attachment":[{"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=243794"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=243794"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=243794"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}