Ka taƙaita labarin:  Wani sabon bincike ya nuna cewa, yanayin da ke daɗa zafin jiki ne ya sa mutane na farko suka isa Yammacin Turai shekaru miliyan ɗaya da dubu ɗari huɗu da suka shige. Masu bincike sun gaskata cewa yaduwar kakanninmu na nesa, hominins, an dakatar da shi ta hanyar yanayin sanyi da bushewa. Amma yayin da yanayi ya yi zafi, sun sami damar yaduwa daga Afirka zuwa Spain, kuma a ƙarshe sun bazu ko'ina cikin Turai. Masu binciken Spain sun ce sauyin yanayi ya shafi ƙaurawar mutane. Har zuwa shekaru miliyan 1.4 da suka gabata, sanyi ya yi yawa don zama a kudu maso gabashin Spain. Amma daga baya yanayin ya yi zafi sosai har ya kai 13°C kuma ya yi zafi sosai. Wannan ya ba da damar hominins (hoton hoton da aka nuna) - kakanninmu masu nisa - don matsawa zuwa sababbin yankuna. Dokta Jordi Agusti ne ya jagoranci binciken daga Cibiyar Catalonia don Bincike da Ci gaban Nazarin (ICREA). An buga shi a cikin Jaridar Juyin Halitta na Dan Adam, takarda ta nuna cewa canjin yanayi ya shafi yawan albarkatun da ake da su. Akwai ra'ayoyi daban-daban da aka gabatar a tsawon shekaru game da abincin kakanninmu na farko, amma wani binciken daga Jami'ar Oxford da aka buga a bara ya yi iƙirarin cewa a ƙarshe ya warware muhawarar. Tsohon kakannin mutane da aka sani da <unk>Nutcracker Man<unk> ya rayu ne da abinci na tiger kwayoyi, tsutsotsi da ƙwari, a cewar bincike. Masana kimiyya sun yi imanin cewa wannan abincin ya bayyana dalilin da ya sa dangin hominin na dā, da ake kira Paranthropus boisei, wanda ya rayu a Gabashin Afirka tsakanin shekaru miliyan 2.4 zuwa miliyan 1.4 da suka wuce, yana da irin wannan ƙwanƙwasa mai ƙarfi da kuma manyan hakora masu faɗi. Ka'idar ta dogara ne akan nazarin shafin Barranco León a cikin Guadix-Baza Basin a kudu maso gabashin Spain. A nan, an riga an samo kayan aikin Oldowan mai sauƙi, wanda ke da alaƙa da farkon hominins da aka sani shekaru miliyan 1.4 da suka gabata, Popular Archaeology ta ruwaito. Amma ba su iya yin hijira zuwa wannan yankin ba har sai yanayin ya inganta. Masu binciken sun ce farkon zamanin Pleistocene (lokacin da ya kasance daga shekaru miliyan 2.59 zuwa 11,700 da suka gabata) ya kasance yana da yanayin sanyi da bushewa. Wannan <unk> mai yiwuwa ya hana zaman wannan yanki da farkon hominin yawan...
Masu binciken na Spain sun ce sauyin yanayi ya shafi ƙaurawar mutane. Har zuwa shekaru miliyan 1.4 da suka gabata, sanyi ya yi yawa don zama a kudu maso gabashin Spain. Amma sai yanayin ya yi zafi zuwa 13 ° C (55 ° F) kuma ya zama mafi zafi. Wannan ya ba da damar hominins - kakanninmu masu nisa - don matsawa zuwa sababbin yankuna.