Yana ba da ƙarin bayani kan yadda mutum ya kasance
Wani jariri mai shekaru akalla 130,000, wanda aka samu a cikin kogo a Laos, zai iya taimakawa masana kimiyya samun ƙarin bayani game da wani ɗan uwan farko na ɗan adam, a cewar wani bincike da aka buga a Nature Communications. Masu bincike sun yi imanin cewa binciken ya tabbatar da cewa Denisovans - wani reshe na ɗan adam da ba a sani ba - sun rayu a cikin wurare masu zafi na kudu maso gabashin Asiya.
An san kadan game da Denisovans, 'yan uwan Neanderthals. Masana kimiyya sun fara gano su ne yayin da suke aiki a cikin kogon Siberiya a shekarar 2010 kuma sun gano kashin yatsa na wata yarinya 'yar kungiyar mutane da ba a san ko su waye ba. Yin amfani da ƙasa kawai da sage da aka samu a cikin Denis Cave, sun fitar da dukkan kwayoyin halittar ƙungiyar.
Sannan a cikin 2019, masu bincike sun gano kashin muƙamuƙi a yankin Tibet, wanda ya tabbatar da cewa wasu nau'ikan ma suna zaune a China. Baya ga wadannan burbushin halittu da ba kasafai ba, mutumin Denisovan bai bar kusan wata alama ba kafin ya bace - sai dai a cikin kwayoyin halittar DNA na dan adam a yau. Godiya ga ƙetare tare da Homo sapiens, ana iya samun ragowar mutumin Denisovan a cikin yawan mutanen da ke kudu maso gabashin Asiya da Oceania. Aborigines da mutanen Papua New Guinea suna da kashi biyar cikin ɗari na DNA na tsohuwar nau'in.
Masana kimiyya sun kammala cewa "magabatan zamani na waɗannan al'ummomi" sun haɗu da "Denisovans a kudu maso gabashin Asiya," in ji Clement Zanoli, masanin burbushin halittu kuma marubucin binciken. Amma babu wani “shaidar zahiri” da ke nuna kasancewarsu a wannan yanki na nahiyar Asiya, nesa da tsaunukan kankara na Siberiya ko Tibet, kamar yadda wani mai bincike daga cibiyar bincike ta Faransa ya shaida wa AFP.
Hakan ya faru ne har sai da gungun masana kimiyya suka fara nazarin ragowar kogon Cobra da ke arewa maso gabashin Laos. Kwararru a cikin kogon sun gano wurin ne a cikin tsaunuka a shekarar 2018 kusa da kogon Tam Pa Ling, inda tuni aka gano gawarwakin mutanen da. Nan da nan ya juya cewa hakorin yana da sifar “kamar mutum”, in ji Zanoli. Binciken ya ce binciken da aka yi na sunadarai na zamanin da ya nuna cewa hakorin na yaro ne, mai yiwuwa yarinya, mai shekaru tsakanin 3.5 zuwa 8.5. Bayan nazarin siffar hakori, masana kimiyya sun yi imanin cewa mai yiwuwa Denisovans ne ya rayu a cikin kogon shekaru 164,000 zuwa 131,000 da suka wuce.
