Paleontologlar onlarca y\u0131ld\u0131r demir bak\u0131m\u0131ndan g\u00fc\u00e7l\u00fc ortamlar\u0131n fosille\u015fme i\u00e7in elveri\u015fsiz oldu\u011funu d\u00fc\u015f\u00fcn\u00fcyordu. Fakat Avustralya’n\u0131n Yeni G\u00fcney Galler eyaletinde, sessiz tar\u0131m yerlerinin alt\u0131nda bulunan bir alan bu yerle\u015fik g\u00f6r\u00fc\u015f\u00fc alt\u00fcst etti. Dailygalaxy’nin aktard\u0131\u011f\u0131na nazaran ara\u015ft\u0131rmac\u0131lar, bilimsel beklentilerle b\u00fcsb\u00fct\u00fcn \u00e7eli\u015fen bir ke\u015ffe imza att\u0131.<\/p>\n
Uzun m\u00fcddet fosil avc\u0131lar\u0131n\u0131n dikkatini \u00e7ekmeyen koyu k\u0131rm\u0131z\u0131, demir a\u00e7\u0131s\u0131ndan varl\u0131kl\u0131 kaya katmanlar\u0131n\u0131n i\u00e7inde, kimsenin varl\u0131\u011f\u0131n\u0131 beklemedi\u011fi kal\u0131nt\u0131lar sakl\u0131yd\u0131. Ara\u015ft\u0131rmac\u0131lar s\u0131radan g\u00f6r\u00fcnen ta\u015flar\u0131 k\u0131rd\u0131klar\u0131nda, harikul\u00e2de detaylara sahip fosillerle kar\u015f\u0131la\u015ft\u0131.<\/p>\n
H\u00dcCRE AYRINTILARINA KADAR VAR<\/b><\/p>\n
Bilim insanlar\u0131; kemik ya da kabuklarla hudutlu olmayan, \u00f6r\u00fcmcek k\u0131llar\u0131, b\u00f6cek g\u00f6zleri, i\u00e7 organlar ve hatta pigment h\u00fccreleri \u00fczere yumu\u015fak dokular\u0131n dahi korundu\u011funu belirledi. Gondwana Research mecmuas\u0131nda yay\u0131mlanan \u00e7al\u0131\u015fmaya nazaran bu fevkal\u00e2de korunma, \u00e7ap\u0131 s\u0131rf 0,005 milimetre olan ultra ince par\u00e7ac\u0131klardan olu\u015fan “demirli beton” sayesinde ger\u00e7ekle\u015fti.<\/p>\n
Bu mikroskobik par\u00e7ac\u0131klar dokular\u0131n i\u00e7ini doldurarak hudut h\u00fccreleri seviyesine kadar detaylar\u0131n korunmas\u0131n\u0131 sa\u011flad\u0131. Ara\u015ft\u0131rmac\u0131lar, fosillerin h\u00fccresel yap\u0131lar\u0131n\u0131n bile se\u00e7ilebildi\u011fini vurgulad\u0131.<\/p>\n
“PASIN \u0130\u00c7\u0130NDE DONMU\u015e” TROP\u0130K ORMAN<\/b><\/p>\n
Ke\u015ffin yap\u0131ld\u0131\u011f\u0131 McGraths Flat b\u00f6lgesindeki korunma seviyesi bilim insanlar\u0131n\u0131 hayrete d\u00fc\u015f\u00fcrd\u00fc. \u00c7al\u0131\u015fmaya, Avustralya M\u00fczesi Ara\u015ft\u0131rma Enstit\u00fcs\u00fc’nden Matthew McCurry, Tara Joki\u0107 ve Patrick Smith liderlik etti. Ara\u015ft\u0131rma, karasal canl\u0131lar\u0131n bu kadar detayl\u0131 bi\u00e7imde fosille\u015fmesinin son derece ender oldu\u011funu ve denizel organizmalara k\u0131yasla \u00e7ok daha az g\u00f6r\u00fcld\u00fc\u011f\u00fcn\u00fc ortaya koydu.<\/p>\n
Uzun m\u00fchlet demirin, organik unsurlar\u0131 oksitleyerek yok etti\u011fi d\u00fc\u015f\u00fcn\u00fcl\u00fcyordu. Bu nedenle demirli ortamlar fosille\u015fme a\u00e7\u0131s\u0131ndan “k\u00f6t\u00fc aday” olarak kabul ediliyordu. Fakat McGraths Flat, farkl\u0131 bir tablo sundu.<\/p>\n
Ara\u015ft\u0131rmac\u0131lara nazaran b\u00f6lge, s\u0131cak ve nemli bir tropik orman ortam\u0131nda olu\u015ftu. Asidik yer alt\u0131 sular\u0131, \u00e7\u00f6z\u00fcnm\u00fc\u015f demiri ta\u015f\u0131yarak eski bir \u0131rmak sistemine ula\u015ft\u0131. Burada demir, suyun i\u00e7inde ultra ince \u00e7\u00f6keltiler halinde tabana \u00e7\u00f6kt\u00fc ve g\u00f6l taban\u0131ndaki meyyit organizmalar\u0131 s\u00fcratle kaplayarak yumu\u015fak dokular\u0131n\u0131 h\u00fccresel seviyede kopyalad\u0131.<\/p>\n
FOS\u0130LLE\u015eME TEKRAR YAZILIYOR<\/b><\/p>\n
Bu ke\u015fif, demirin san\u0131lan\u0131n tersine uygun \u015fartlarda son derece g\u00fc\u00e7l\u00fc bir fosille\u015fme arac\u0131 olabilece\u011fini g\u00f6sterdi. Bilim insanlar\u0131, emsal \u015fartlar\u0131n ge\u00e7mi\u015fte d\u00fc\u015f\u00fcn\u00fcld\u00fc\u011f\u00fcnden \u00e7ok daha fazla b\u00f6lgede var olmu\u015f olabilece\u011fine dikkat \u00e7ekiyor.<\/p>\n
Ara\u015ft\u0131rmac\u0131lar, bu alan\u0131n nas\u0131l olu\u015ftu\u011funu anlaman\u0131n, d\u00fcnya genelinde benzeri fosil yataklar\u0131n\u0131 bulmak i\u00e7in bir “rehber” fonksiyonu g\u00f6rebilece\u011fini belirtiyor. Bilhassa bazalt y\u00fckl\u00fc b\u00f6lgeler, eski \u0131rmak yataklar\u0131 ve d\u00fc\u015f\u00fck s\u00fclf\u00fcr i\u00e7eren alanlar, gelecekte yeni ve sakl\u0131 fosil ke\u015fiflerine kap\u0131 aralayabilir.<\/p>\n
\u00c7\u0130N’DE EN AZ 72 B\u0130N YILLIK TA\u015e ALETLER<\/b><\/p>\n
\u00d6te yandan \u00c7in’deki bir arkeolojik alanda bulunan karma\u015f\u0131k tarih \u00f6ncesi ta\u015f aletler, insan evrimine dair yerle\u015fik g\u00f6r\u00fc\u015fleri de sars\u0131yor. Danjiangkou Baraj\u0131 etraf\u0131ndaki hafriyatlar, insan cetlerinin 160 bin ile 72 bin y\u0131l evvel teknolojik a\u00e7\u0131dan geli\u015fmi\u015f ta\u015f aletler kulland\u0131\u011f\u0131n\u0131 ortaya koydu. Bu bulgular, erken insan topluluklar\u0131n\u0131n bili\u015fsel ve teknolojik kapasitesinin san\u0131landan \u00e7ok daha ileri olabilece\u011fine delil olarak kabul ediliyor.<\/p>\n","protected":false},"excerpt":{"rendered":"
Avustralya’da k\u0131rm\u0131z\u0131 kayalar\u0131n i\u00e7inde, yumu\u015fak dokular\u0131na kadar korunmu\u015f fosiller ortaya \u00e7\u0131kar\u0131ld\u0131.<\/p>\n","protected":false},"author":1,"featured_media":95978,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[43],"tags":[4265,1227,3335,711,1461],"class_list":["post-95977","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dunya","tag-arastirmacilar","tag-demir","tag-hucre","tag-insan","tag-tas"],"_links":{"self":[{"href":"https:\/\/ikimisli.tr\/index.php\/wp-json\/wp\/v2\/posts\/95977","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ikimisli.tr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ikimisli.tr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ikimisli.tr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ikimisli.tr\/index.php\/wp-json\/wp\/v2\/comments?post=95977"}],"version-history":[{"count":1,"href":"https:\/\/ikimisli.tr\/index.php\/wp-json\/wp\/v2\/posts\/95977\/revisions"}],"predecessor-version":[{"id":95979,"href":"https:\/\/ikimisli.tr\/index.php\/wp-json\/wp\/v2\/posts\/95977\/revisions\/95979"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ikimisli.tr\/index.php\/wp-json\/wp\/v2\/media\/95978"}],"wp:attachment":[{"href":"https:\/\/ikimisli.tr\/index.php\/wp-json\/wp\/v2\/media?parent=95977"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ikimisli.tr\/index.php\/wp-json\/wp\/v2\/categories?post=95977"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ikimisli.tr\/index.php\/wp-json\/wp\/v2\/tags?post=95977"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}