Farfadowar dinosaur ta biyu.

"Sarkin hanci?". Wannan shine sunan da aka ba wani hadrosaur da aka gano kwanan nan mai suna Rhinorex condrupus na kimiyya. Ya duba shuke-shuken marigayi Cretaceous kimanin shekaru miliyan 75 da suka gabata.
Ba kamar sauran hadrosaurs ba, Rhinorex ba ta da ƙashi ko nama a kanta. Madadin haka, tana da babban hanci. Haka kuma, ba a cikin wani dutse kamar sauran hadrosaurs ba ne, amma an gano ta a Jami'ar Brigham Young a kan shiryayye a ɗakin baya.

Shekaru da dama, mafarauta na dinosaur suna gudanar da ayyukansu da kayan kida da shebur, wani lokacin kuma suna yin amfani da dynamite. Suna sassaka duwatsu da kuma ƙona tarin duwatsu a kowace bazara, suna neman ƙasusuwa. Dakunan gwaje-gwaje na jami'a da gidajen tarihi na halitta cike da kwarangwal na dinosaur. Duk da haka, wani ɓangare mai yawa na burbushin halittun suna nan a cikin akwatuna da simintin filastik da aka yi a cikin kwandon ajiya. Ba a ba su damar ba da labarinsu ba.

Wannan yanayi ya canza yanzu. Wasu masana ilmin burbushin halittu sun bayyana kimiyyar dinosaur a matsayin wadda ke fuskantar sake farfadowa ta biyu. Abin da suke nufi shi ne cewa ana ɗaukar sabbin hanyoyi don samun zurfafa fahimtar rayuwa da zamanin dinosaur.

Ɗaya daga cikin waɗannan sabbin hanyoyin ita ce kawai a duba abin da aka riga aka samo, kamar yadda lamarin Rhinorex ya faru.
A shekarun 1990, an ajiye burbushin Rhinorex a Jami'ar Brigham Young. A lokacin, masana ilmin burbushin halittu sun mayar da hankali kan tasirin fata da aka samu a kan ƙasusuwan gangar jikin hadrosaur, wanda hakan ya sa ba a bar lokaci mai yawa ba ga kwanyar da aka yi wa burbushin har yanzu a cikin duwatsu. Sannan, masu bincike biyu na digiri na biyu sun yanke shawarar duba kwanyar dinosaur. Shekaru biyu bayan haka, an gano Rhinorex. Masana burbushin halittu suna ƙara haske kan aikinsu.
An fara haƙa Rhinorex ne daga wani yanki na Utah da ake kira wurin Neslen. Masana ilimin ƙasa sun sami cikakken hoto game da yanayin wurin Neslen da ya daɗe. Wurin zama ne na bakin teku, wani yanki mai laushi inda ruwan sabo da gishiri suka haɗu kusa da gabar tekun tsohuwar teku. Amma a cikin ƙasa, mil 200 nesa, ƙasar ta bambanta sosai. An haƙa sauran hadrosaurs, nau'in crested, a cikin ƙasa. Domin masana kimiyyar palenontologists na baya ba su bincika cikakken kwarangwal na Neslen ba, sun ɗauka shi ma hadrosaur ne mai crested. Sakamakon wannan zato, an yanke hukuncin cewa duk hadrosaurs masu crested za su iya amfani da albarkatun cikin ƙasa da na estuarine daidai gwargwado. Sai da masana kimiyyar paleonotologists suka sake duba shi cewa ainihin Rhinorex ne.

Kamar wani wasan kwaikwayo da ya faɗi a wurinsa, gano cewa Rhinorex sabon nau'in rayuwar Cretaceous ce ta ƙarshen zamani. Samun "Sarkin Hanci" ya nuna cewa nau'ikan hadrosaurs daban-daban sun daidaita kuma sun samo asali don cike guraben muhalli daban-daban.
Ta hanyar duba burbushin halittu a cikin kwandon adana ƙura, masana ilmin burbushin halittu suna samun sabbin rassan bishiyar rayuwa ta dinosaur.

——— Daga Dan Risch