{"id":671209,"date":"2026-01-13T14:26:03","date_gmt":"2026-01-13T14:26:03","guid":{"rendered":"https:\/\/microscopemedia.com\/?p=671209"},"modified":"2026-01-13T14:26:03","modified_gmt":"2026-01-13T14:26:03","slug":"un-muzeu-a-pastrat-timp-de-70-de-ani-oase-de-mamut-care-de-fapt-apartineau-unei-alte-specii","status":"publish","type":"post","link":"https:\/\/microscopemedia.com\/?p=671209","title":{"rendered":"Un muzeu a p\u0103strat timp de 70 de ani oase de \u201emamut\u201d care, de fapt, apar\u021bineau unei alte specii"},"content":{"rendered":"
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Oase fosilizate considerate mult timp r\u0103m\u0103\u0219i\u021be de mamut l\u00e2nos s-au dovedit a fi cu totul altceva.<\/p>\n

Dup\u0103 mai bine de \u0219apte decenii petrecute \u00een arhivele unui muzeu, analize \u0219tiin\u021bifice recente arat\u0103 c\u0103 fragmentele provin de la balene antice, nu de la gigan\u021bi ai Epocii Glaciare, scrie ScienceAlert<\/a><\/span>.<\/p>\n

O descoperire reevaluat\u0103 dup\u0103 decenii<\/h2>\n

Oasele au fost colectate ini\u021bial \u00een 1951 de arheologul Otto Geist, \u00een timpul unei expedi\u021bii \u00een interiorul statului Alaska, \u00eentr-o regiune cunoscut\u0103 sub numele de Beringia.<\/p>\n

La acea vreme, dimensiunea impresionant\u0103 a fragmentelor \u0219i apropierea de ora\u0219ul Fairbanks f\u0103ceau plauzibil\u0103 identificarea lor drept r\u0103m\u0103\u0219i\u021be de mamut.<\/p>\n

Fosilele au fost catalogate ca apar\u021bin\u00e2nd unui mamut l\u00e2nos \u0219i depozitate la Muzeul Universit\u0103\u021bii din Alaska, unde au r\u0103mas \u00een mare parte neatinse timp de zeci de ani.<\/p>\n

Abia recent au fost reanalizate, dup\u0103 ce programul \u201eAdopt-a-Mammoth\u201d al muzeului a permis efectuarea unor teste detaliate de datare cu radiocarbon.<\/p>\n

Datarea cu radiocarbon a ridicat primele semne de \u00eentrebare<\/h2>\n

Cercet\u0103torii au fost surprin\u0219i s\u0103 descopere c\u0103 oasele au o vechime de doar 2.000-3.000 de ani.<\/p>\n

Aceast\u0103 v\u00e2rst\u0103 este mult mai mic\u0103 dec\u00e2t cea a mamu\u021bilor, despre care se crede c\u0103 au disp\u0103rut din Alaska continental\u0103 acum aproximativ 13.000 de ani.<\/p>\n

Biogeochimistul Matthew Wooller a subliniat c\u0103 o astfel de datare ar fi schimbat complet cronologia extinc\u021biei mamu\u021bilor.<\/p>\n

\u00cenainte de a trage concluzii radicale, echipa a decis s\u0103 verifice din nou identificarea speciei prin analize chimice \u0219i genetice.<\/p>\n

Izotopii \u0219i ADN-ul indic\u0103 un animal marin<\/h2>\n

Analiza izotopic\u0103 a relevat niveluri neobi\u0219nuit de ridicate de azot-15 \u0219i carbon-13, semn\u0103turi tipice animalelor marine.<\/p>\n

Astfel de markeri chimici sunt incompatibili cu erbivorele terestre, precum mamu\u021bii<\/a><\/span>.<\/p>\n

ADN-ul mitocondrial extras din oase a indicat specii de balene, inclusiv balena dreapt\u0103 din Pacificul de Nord \u0219i balena Minke comun\u0103.<\/p>\n

Descoperirea a generat un nou mister, cum au ajuns r\u0103m\u0103\u0219i\u021be de balen\u0103 la peste 400 de kilometri de cea mai apropiat\u0103 coast\u0103.<\/p>\n

Cercet\u0103torii iau \u00een calcul mai multe explica\u021bii, de la transportul realizat de oameni \u00een vechime p\u00e2n\u0103 la erori de catalogare istoric\u0103.<\/p>\n

De\u0219i r\u0103spunsul final r\u0103m\u00e2ne necunoscut, studiul a exclus definitiv ipoteza c\u0103 oasele ar fi apar\u021binut mamu\u021bilor.<\/p>\n

Rezultatele cercet\u0103rii au fost publicate \u00een Journal of Quaternary Science<\/a><\/span>.<\/p>\n","protected":false},"excerpt":{"rendered":"

Oase fosilizate considerate mult timp r\u0103m\u0103\u0219i\u021be de mamut l\u00e2nos s-au dovedit a fi cu totul altceva. Dup\u0103 mai bine de \u0219apte decenii petrecute \u00een arhivele unui muzeu, analize \u0219tiin\u021bifice recente … Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":671210,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"Default","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/posts\/671209"}],"collection":[{"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=671209"}],"version-history":[{"count":0,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/posts\/671209\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/media\/671210"}],"wp:attachment":[{"href":"https:\/\/microscopemedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=671209"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=671209"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=671209"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}