Ngokuphathelele izizathu zokuphela kweedayinaso, kusafundwa. Kangangexesha elide, umbono onegunya, kunye nokuphela kweedayinaso kwiminyaka engama-6500 eyadlulayo malunga ne-meteorite enkulu. Ngokutsho kolu phononongo, kwakukho i-asteroid enobubanzi obuyi-7-10 km eya kuwa phezu komhlaba, nto leyo eyabangela ukuqhuma okukhulu, njengokuphosa uthuli oluninzi emoyeni ukuze kwenziwe iZhetianbiri House of Sand and Inkungu, okwakhokelela ekumisweni kwe-photosynthesis yezityalo, kwaye ngenxa yoko ukuphela kweedayinaso. Ithiyori yempembelelo ye-asteroid yafumana inkxaso ngokukhawuleza kwizazinzulu ezininzi. Ngo-1991, kwiPeninsula yaseYucatan yaseMexico kwenzeka ekufumanekeni kwexesha elide lee-craters zempembelelo ze-meteorite, inyaniso bubungqina obungakumbi bale ngongoma. Namhlanje, le mbono ibonakala ngathi ibe sisigqibo.
Kodwa kukwakho nabantu abaninzi ngempembelelo enjalo ye-asteroid kubantu abathandabuzayo, kuba inyani yile: amasele, iingwenya kunye nezinye ezininzi ezinobuthathaka kakhulu kubushushu bezilwanyana ziye zachasa zaza zasinda kwiCretaceous. Le ngcamango ayinakuchaza ukuba kutheni kuphela iidinosaur ezafayo. Ukuza kuthi ga ngoku, izazinzulu ziye zabeka phambili isizathu sokuphela kweedinosaur, iimeko ezininzi ziye zaba nkulu kakhulu, "watsho ungqubano lwe-meteorite," kodwa yenye yazo. Ukongeza kwi-"meteorite collision", ukuphela kweedinosaur kwimbono ephambili kukho oku kulandelayo: Okokuqala, utshintsho lwemozulu, utshilo. Kwiminyaka eyi-6500 yezigidi eyadlulayo, imozulu yoMhlaba yatshintsha ngequbuliso kubushushu behla, nto leyo eyabangela ukuncipha kweoksijini emoyeni kangangokuba iidinosaur azinakusinda. Kwakhona kwacetyiswa ukuba iidinosaur zinegazi elibandayo, kodwa zingenazinwele okanye amalungu afudumeleyo kwaye azinakuziqhelanisa nobushushu boMhlaba behla, zaza zafa zikhenkcezisiwe.
Okwesibini, olu hlobo, utshilo umlo. Ukuphela kwexesha ledayinaso, kwaqala ukubonakala kwizilwanyana ezincinci ezanyisayo, ezi zilwanyana zidla iimpuku zinokondla amaqanda. Ngenxa yokunqongophala kwezilwanyana ezincinci ezidla iimpuku, ziya ziwadla ngakumbi nangakumbi amaqanda ekugqibeleni.
Okwesithathu, ukukhukhuleka kwelizwekazi, utshilo. Uphando lweGeology lubonisa ukuba ukusinda kweedinosaur ngexesha loMhlaba kuyinxalenye nje yelizwekazi kuphela, oko kukuthi, "iPangea." Ngenxa yotshintsho kuqweqwe lomhlaba, ilizwekazi lenzeka kwiJurassic yokwahlukana okukhulu nokukhukhuleka, nto leyo eyakhokelela kutshintsho lwendalo esingqongileyo kunye nemozulu, kwaye ke ngoko ukuphela kweedinosaur.
Okwesine, utshintsho kwi-geomagnetic lutshilo. Ibhayoloji yanamhlanje ibonisa ukuba amasimi athile ebhayoloji kunye nemagnethi anxulumene nokufa. Ubuthathaka ngakumbi kwi-magnetic field yebhayoloji, kutshintsho lwe-magnetic field yoMhlaba, kunokukhokelela ekutshabalaleni. Kubonakala ngathi ke ngoko ukuphela kwee-dinosaur kunokunxulunyaniswa notshintsho kwi-magnetic field yoMhlaba. V. uthe ityhefu ye-angiosperm. Ukuphela kwexesha le-dinosaur, i-gymnosperms yoMhlaba iyanyamalala kancinci kancinci, ithatyathelwe indawo linani elikhulu le-angiosperms, ii-gymnosperms ziqulathe ezi zityalo azikho kwimo yetyhefu yokutya okungaqhelekanga kwe-dinosaur enkulu, ukutya inani elikhulu le-angiosperms kukhokelele ekuqokeleleni kweetyhefu emzimbeni. Kuninzi kakhulu, ekugqibeleni ityhefu. Isithandathu, utshilo imvula ye-asidi. Ixesha laseCretaceous lasekupheleni lisenokuba laliphantsi kwemvula enamandla ye-asidi, umhlaba, kuquka kwi-trace element strontium, ii-dinosaur ezinyibilikisiweyo ngamanzi okusela nokutya, ngokuthe ngqo okanye ngokungathanga ngqo, ukutya kwe-strontium, ityhefu ebukhali okanye engapheliyo, amaqela okugqibela abafileyo.
Izizathu zokuphela kweedinosaur kwingcamango yokuba ezi zikhankanyiweyo apha ngasentla zingaphezulu kakhulu kunezi. Kodwa ezi ngcamango zikhankanyiweyo apha ngasentla kuluntu lwezenzululwazi zinabaxhasi abaninzi. Ewe, nganye kwezi zikhankanyiweyo apha ngasentla, kukho indawo engaphelelanga. Umzekelo, "utshintsho lwemozulu" alucacisi izizathu zotshintsho lwemozulu. Emva kokuhlolwa, ezinye iidinosaur ezincinci kwiCoelurosauria, ezinolwanele kwangethuba ngokuchasene nezilwanyana ezincinci, ngoko "iintlobo ziyasokola ukutsho" kukho iindlela zokuphuma. Kwi-geology yanamhlanje, "ithiyori yokukhukhuleka kwelizwekazi" ngokwayo isengumbono. "Ityhefu ye-Angiosperms" kunye "nemvula ye-asidi" kukungabikho kobungqina obaneleyo. Ngenxa yoko, unobangela wokwenyani wokuphela kweedinosaur, abakawuhlolisisi ngakumbi.
IWebhusayithi esemthethweni ye-Kawah Dinosaur:www.kawahdinosaur.com