T\u00fdm v\u011bdc\u016f z Korejsk\u00e9ho institutu pro geov\u011bdy a nerostn\u00e9 suroviny objevil v jihokorejsk\u00e9m kr\u00e1teru Hapcheon, kter\u00fd vznikl asi p\u0159ed 42 tis\u00edci lety, zvl\u00e1\u0161tn\u00ed vrstven\u00e9 horninov\u00e9 \u00fatvary zn\u00e1m\u00e9 jako stromatolity. Ty vznikaj\u00ed \u010dinnost\u00ed mikrobi\u00e1ln\u00edch koloni\u00ed a pat\u0159\u00ed mezi nejstar\u0161\u00ed zn\u00e1m\u00e9 d\u016fkazy \u017eivota na Zemi. Kr\u00e1ter slou\u017e\u00ed jako jak\u00fdsi stroj \u010dasu. Podm\u00ednky, kter\u00e9 v n\u011bm vznikly po dopadu p\u0159ed 42 tis\u00edci lety, p\u0159esn\u011b simuluj\u00ed to, co se d\u011blo na Zemi p\u0159ed miliardami let.<\/p>\n
V\u011bdci v jihokorejsk\u00e9m kr\u00e1teru objevili stopy mimozemsk\u00e9ho materi\u00e1lu i prastar\u00fdch mikroorganism\u016f produkuj\u00edc\u00edch kysl\u00edk. Podle nov\u00e9 studie mohly pr\u00e1v\u011b dopady asteroid\u016f na mlad\u00e9 Zemi vytv\u00e1\u0159et hork\u00e1 jezera bohat\u00e1 na miner\u00e1ly \u2013 prost\u0159ed\u00ed, v n\u011bm\u017e se ran\u00e9mu \u017eivotu mimo\u0159\u00e1dn\u011b da\u0159ilo. Objev tak otev\u00edr\u00e1 nov\u00e9 ot\u00e1zky o tom, jak vznikla atmosf\u00e9ra, d\u00edky n\u00ed\u017e dnes m\u016f\u017ee na Zemi existovat slo\u017eit\u00fd \u017eivot. <\/p>\n
Pr\u00e1v\u011b v t\u011bchto usazenin\u00e1ch v\u011bdci na\u0161li stromatolity vytv\u00e1\u0159en\u00e9 p\u0159edev\u0161\u00edm sinicemi, tedy organismy schopn\u00fdmi produkovat kysl\u00edk pomoc\u00ed fotosynt\u00e9zy. Geochemick\u00e1 anal\u00fdza uk\u00e1zala, \u017ee nesou chemick\u00fd podpis okoln\u00edch hornin i materi\u00e1lu poch\u00e1zej\u00edc\u00edho z asteroidu.<\/p>\n
\u201eToto je prvn\u00ed komplexn\u00ed d\u016fkaz nazna\u010duj\u00edc\u00ed, \u017ee stromatolity mohly vznikat v hydroterm\u00e1ln\u00edch jezerech vytvo\u0159en\u00fdch dopady asteroid\u016f,\u201c uvedl vedouc\u00ed studie<\/a> Jaesoo Lim. \u201eTakov\u00e1 prost\u0159ed\u00ed mohla poskytovat p\u0159\u00edzniv\u00e9 podm\u00ednky pro ran\u00e9 mikrobi\u00e1ln\u00ed ekosyst\u00e9my.\u201c<\/p>\n \u201eO\u00e1zy \u017eivota\u201c<\/p>\n Objev je zaj\u00edmav\u00fd p\u0159edev\u0161\u00edm kv\u016fli ot\u00e1zce, jak Zem\u011b z\u00edskala kysl\u00edk. P\u0159ed v\u00edce ne\u017e dv\u011bma miliardami let toti\u017e atmosf\u00e9ra obsahovala jen minim\u00e1ln\u00ed mno\u017estv\u00ed tohoto plynu. Podle v\u011bdc\u016f v\u0161ak pr\u00e1v\u011b sinice podobn\u00e9 t\u011bm, kter\u00e9 vytv\u00e1\u0159ely stromatolity, za\u010daly postupn\u011b produkovat kysl\u00edk ve velk\u00e9m.<\/p>\n Podle autor\u016f studie mohly impaktn\u00ed kr\u00e1tery p\u0159ed miliardami let b\u011bhem ran\u00e9 historie Zem\u011b fungovat jako lok\u00e1ln\u00ed \u201eo\u00e1zy \u017eivota\u201c, kde se t\u011bmto mikroorganism\u016fm mimo\u0159\u00e1dn\u011b da\u0159ilo. Asteroidy tak mo\u017en\u00e1 nep\u0159\u00edmo p\u0159isp\u011bly ke vzniku podm\u00ednek, d\u00edky nim\u017e se mohl vyvinout slo\u017eit\u00fd \u017eivot.<\/p>\n V\u00fdsledky jsou d\u016fle\u017eit\u00e9 i pro hled\u00e1n\u00ed \u017eivota mimo Zemi. Podobn\u00e1 hydroterm\u00e1ln\u00ed prost\u0159ed\u00ed mohla toti\u017e v minulosti existovat tak\u00e9 na Marsu, kter\u00fd byl kdysi teplej\u0161\u00ed a vlh\u010d\u00ed ne\u017e dnes. Pr\u00e1v\u011b star\u00e9 impaktn\u00ed kr\u00e1tery proto v\u011bdci pova\u017euj\u00ed za jedno z nejslibn\u011bj\u0161\u00edch m\u00edst pro hled\u00e1n\u00ed stop d\u00e1vn\u00e9ho mimozemsk\u00e9ho \u017eivota.<\/p>\n VIDEO: K\u00e1men, kter\u00fd vesm\u00edrn\u00fd rover sv\u00fdm t\u00e9m\u011b\u0159 tunov\u00fdm t\u011blem mimod\u011bk rozdrtil, skr\u00fdval to, co NASA popisuje jako opravdov\u00fd poklad.<\/p>\n Zdroje: Nature<\/a>, BBC<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"T\u00fdm v\u011bdc\u016f z Korejsk\u00e9ho institutu pro geov\u011bdy a nerostn\u00e9 suroviny objevil v jihokorejsk\u00e9m kr\u00e1teru Hapcheon, kter\u00fd vznikl asi…\n","protected":false},"author":2,"featured_media":98012,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_share_on_mastodon":"0"},"categories":[13],"tags":[1541,74,73,78,75,77,76,1540],"class_list":["post-98011","post","type-post","status-publish","format-standard","has-post-thumbnail","category-veda-a-technika","tag-asteroid","tag-science","tag-science-technology","tag-technika","tag-technology","tag-veda","tag-veda-a-technika","tag-vesmir"],"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@cz\/116641947009030969","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/posts\/98011","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/comments?post=98011"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/posts\/98011\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/media\/98012"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/media?parent=98011"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/categories?post=98011"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/tags?post=98011"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}