Ka taƙaita labarin:  An yi imanin cewa an halicci wasu tsoffin kwararo-kwararo guda biyu da ke makwabtaka da juna ta hanyar haɗarin haɗari guda biyu yanzu ana tunanin cewa an halicce su ne ta hanyar taurari biyu daban-daban. An kai ga ra'ayin da ba zai yiwu ba bayan masana kimiyya sun sake nazarin duwatsu a wurin, kuma sun gano kwanakin biyu sun bambanta sosai. Duk da yake an yi tunanin cewa duka shekaru miliyan 285 ne, yanzu ya bayyana cewa daya daga cikin ramuka a zahiri yana da shekaru miliyan 450 amma, kwatsam, an ƙirƙira shi kusan daidai a wuri ɗaya. Gungura ƙasa don bidiyo. Rukunin ruwa biyu na Clearwater Lake a Kanada bazai iya kasancewa ta hanyar binary asteroid ba. An yi imanin cewa asteroid crater na Gabas ya shafi yanayin teku a lokacin Ordovician, shekaru miliyan 490 da suka gabata. An samar da ramin yamma a lokacin Permian shekaru miliyan 285 da suka gabata kuma ya shafi ƙasar Pangaea. Masu bincike daga Jami'ar Western Australia sun ce tafkunan Clearwater a Kanada sun kasance ne ta hanyar abubuwa biyu daban-daban a cikin 'haƙiƙa'. Binciken mai ban mamaki, idan an tabbatar da shi, yana da mahimmancin tasiri ga sauran abubuwan da ake kira 'doublet' craters a cikin tsarin hasken rana, wanda a baya aka yi tunanin cewa an kafa su ta hanyar binary ko duwatsu masu yawa da suka shafi lokaci guda. Kuma babban bambanci a lokaci tsakanin abubuwan biyu ya fi ban mamaki kamar yadda, a lokacin da aka yi ramin farko, wurin na biyu yana ƙarƙashin ruwa. An buga binciken ne a mujallar Geochimica et Cosmochimica Acta kuma Astrobiology Magazine ta ruwaito shi. Abubuwan da ke barin rami mai nisan mil 62 (100km) ko ƙasa da haka, kamar waɗanda suka buge tafkunan Clearwater, ana tunanin cewa ba su da tasirin duniya. A gaskiya ma, tasirin zai iya ƙara yawan halittu. Alal misali, Babban Ordovician Biodiversity Event, wanda ya ga fashewa a cikin yawan nau'in dabbobi kimanin shekaru 470 da suka wuce, an haɗa shi da abubuwan da suka faru a cikin lokaci. Wannan mai yiwuwa ne saboda gaskiyar cewa tasiri zai iya rushe rayuwar gida kawai don barin wani nau'in ya mallaki, ko kuma saboda jinkirin sanyaya craters na iya samarwa...
Wataƙila ba wani tauraron dan adam ne ya kafa ramuka biyu a Kanada ba. An yi imanin cewa an kafa Clearwater Lakes duka shekaru 285m da suka gabata. Amma nazarin duwatsu ya nuna cewa tafkin Gabas ya fi tsufa. An yi imanin cewa an halicce shi daban shekaru miliyan 460 da suka gabata. Wannan yana nufin cewa an kafa craters ne ta hanyar haɗari mai ban mamaki na asteroids biyu da suka sauka a wuri guda, shekaru miliyan 185 baya.