Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: An yi imanin cewa tsoffin marsupials sun yi ƙaura daga abin da yanzu ke Kudancin Amurka zuwa Ostiraliya dubun miliyoyin shekaru da suka gabata a lokacin Gondwana, kuma sun samo asali yayin da Ostiraliya ta zama mafi ƙaranci. An samo burbushin halittu masu kama da aljanu na zamani, amma ba a san ko sun kasance kakannin jinsunan zamani ba, ko kuma ko aljannu na yanzu sun kasance tare da waɗannan nau'ikan. Ranar da aljanin Tasmanian ya zama ya mutu daga yankin Australiya ba shi da tabbas; mafi yawan shaidu sun nuna cewa sun yi kwangila zuwa ga al'ummomi uku da suka rage kimanin shekaru 3000 da suka gabata. An gano wani hakori da aka samo a Augusta, Western Australia zuwa shekaru 430 da suka gabata, amma masanin ilimin kimiyyar kayan tarihi Oliver Brown ya yi jayayya da wannan kuma ya yi la'akari da mutuwar Iblis a cikin babban yankin ya faru kimanin shekaru 3000 da suka gabata.Wannan ɓacewar yawanci ana zargi da dingoes, waɗanda ba su kasance a Tasmania ba. Saboda ana ganin su a matsayin barazana ga dabbobi da dabbobi da mutane suka farauta don fata a Tasmania, an farautar aljanu kuma sun zama masu haɗari. A shekara ta 1941, aljanu, waɗanda da farko ake ganinsu da mugunta ƙwarai, sun zama waɗanda aka kāre a hukumance. Tun daga wannan lokacin, masana kimiyya sun yi jayayya cewa damuwar da ta gabata cewa aljanu sune babbar barazana ga dabbobi an wuce gona da iri kuma ba daidai ba.  Tambaya: Waɗanne dabbobi ne daga baya suka zama masu haɗari a Tasmania?
aljannu