Ngokubhekiselele kwizizathu zokuphela kweedinosaurs, kusafundwa. Ixesha elide, imbono enegunya kakhulu, kunye nokuphela kweedinosaurs kwiminyaka eyi-6500 edlulileyo malunga ne-meteorite enkulu. Ngokutsho kophononongo, kwakukho 7-10 km ububanzi asteroid uya kuwa phezu komhlaba, ebangela ugqabhuko-dubulo olukhulu, ezifana ukujula uthuli oluninzi emoyeni ukuze enze Zhetianbiri House of Sand kunye nenkungu, kwakhokelela ekubeni ukunqunyanyiswa kwe-photosynthesis yezityalo , Kwaye ngoko ke ukutshatyalaliswa kweedinosaurs.Ithiyori yempembelelo ye-Asteroid ngokukhawuleza yafumana inkxaso yezazinzulu ezininzi. Ngo-1991, eYucatan Peninsula yaseMexico yenzeka ekufumaneni ixesha elide le meteorite impact craters, inyani bubungqina obongezelelweyo balombono. Namhlanje, le mbono ibonakala isisigqibo.
Kodwa kukho kwakhona abantu abaninzi impembelelo asteroid enjalo kwi amathandabuzo, kuba inyaniso kukuba: amasele, iingwenya kunye nezinye ezininzi kakhulu uvakalelo kubushushu bezilwanyana baye baxhathisa kwaye basinda Cretaceous. Le ngcamango ayikwazi ukuchaza ukuba kutheni iidinosaur kuphela zafa. Ukuza kuthi ga ngoku, izazinzulu ziye zabeka phambili unobangela wokuphela kweedayinaso azikho ngaphantsi kweshumi elinesibini leemeko, ubutyebi obuninzi obumangalisayo kunye nemincili, "utshilo ukungqubana kweemeteorite," kodwa yenye yazo. "Ungquzulwano lwemeteorite", ukuphela kweedinosaurs kwindawo ephambili yokujonga kukho oku kulandelayo:Okokuqala, utshintsho lwemozulu, utshilo. Kwiminyaka engama-6500 yezigidi eyadlulayo, imozulu yoMhlaba itshintsha ngesiquphe kwiqondo lobushushu lehla, nto leyo ekhokelela ekuncipheni kweoksijini kwiatmosfera ukuze iidinosaur zingakwazi ukuphila.Kwacetyiswa ukuba iidinosaur zinegazi elibandayo, kodwa azinanwele okanye ilungu elifudumeleyo. hayi ukuziqhelanisa nobushushu boMhlaba lehla, zaye zingumkhenkce ukufa.
Okwesibini, uhlobo, wathi ukulwa. Ukuphela kwexesha le-dinosaur, okokuqala kubonakala kwizilwanyana ezincinci ezincancisayo, ezi zilwanyana zizilwanyana ezizizilwanyana ezinokutya amaqanda.Ngenxa yokunqongophala kwezilwanyana ezincinci, ngakumbi kwaye ekugqibeleni zidle amaqanda.
Okwesithathu, i-continental drift, yathi. Uphando lweGeology lubonisa ukuba ukusinda kweedayinaso kwiminyaka yobudala boMhlaba kuphela sisiqwenga selizwe, oko kukuthi, "iPangea." Ngenxa yotshintsho kuqweqwe lomhlaba, ilizwekazi lenzeka kwiJurassic yolwahlulo olukhulu kunye nokukhukuliseka, okukhokelela kokusingqongileyo kunye nokutshintsha kwemozulu, kwaye ngenxa yoko ukuphela kweedinosaurs.
Okwesine, utshintsho kwi-geomagnetic uthe. Ibhayoloji yanamhlanje ibonisa ukuba imimandla ethile yebhayoloji kunye nemagnethi enxulumene nokufa.Uvakalelo ngakumbi kwimagnethi yebhayoloji, kutshintsho lwemagnethi yomhlaba, kunokukhokelela ekuphelisweni.Kubonakala ke ngoko ukuba ukuphela kweedinosaurs kunokunxulumana notshintsho umhlaba wemagnethi. V. uthe angiosperm poisoning. Ukuphela kwexesha le-dinosaur, ii-gymnosperms zoMhlaba ziyanyamalala ngokuthe ngcembe, zithathelwe indawo linani elikhulu lee-angiosperms, ii-gymnosperms ziqulathe ezi zityalo azikho kwimilo eyityhefu yokutya kwe-dinosaur enkulu engaqhelekanga, ukungeniswa kwenani elikhulu le-angiosperms kukhokelele ekuqokeleleni kweetoxins umzimba Kakhulu, ekugqibeleni ityhefu.Isithandathu, wathi imvula acid. Ixesha le-Cretaceous lasekupheleni linokuba phantsi kwemvula enamandla ye-asidi, umhlaba, kubandakanywa kwi-trace element strontium, i-dinosaur echithwe ngamanzi okusela kunye nokutya, ngokuthe ngqo okanye ngokungathanga ngqo, i-strontium intake, ityhefu eyingozi okanye engapheliyo, amaqela okugqibela abafileyo.
Izizathu zokuphela kweedayinaso kwingcinga yokuba ezi zikhankanywe ngasentla zingaphezulu kakhulu kwezi. Kodwa le hypothesis ikhankanywe ngasentla kwinzululwazi inabaxhasi abaninzi.Kambe ke, nganye kwezi zingasentla, kukho indawo engafezekanga. Umzekelo, "utshintsho lwemozulu" alucacisi oonobangela bokutshintsha kwemozulu. Emva kokuhlolwa, ezinye iidayinaso ezincinci kwiCoelurosauria, zinexesha elaneleyo lokulwa nezilwanyana ezincancisayo, ngoko ke "iintlobo ziyasokola ukutsho" kukho imingxuma. Kwi-geology yanamhlanje, "ithiyori ye-continental drift" ngokwayo iseyi-hypothesis."I-Angiosperms poisoning" kunye "nemvula yeasidi" ukunqongophala kobungqina obaneleyo. Ngenxa yoko, oyena nobangela wokuphela kweedayinaso, kusafuneka uphonononge ngakumbi.
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