Ukuhlaziywa okusha kwe-DNA kwahlukaniswa nezinsalela zakudala zezinja zakudala kwabonisa ukuthi bafuywe eSiberia cishe eminyakeni eyizinkulungwane ezingama-23 edlule. Ukusuka lapha, basakazeka entshonalanga nasempumalanga, kanye namakhosi abo asanda kutholwa bawela i-strait eqandisiwe ngaleso sikhathi bangena eMelika. Lesi sithombe sichaza ababhali bendatshana entsha eshicilelwe ku-PNAS Magazine.
Eqinisweni, izinja zaba yizilwane zokuqala ezifuywayo, kepha imininingwane eminingi yale nqubo ihlala iyimfihlakalo. I-genome yabo namuhla ididekile ukuthi imizamo yokulandela imvelaphi yawokuqala ezifuywayo ibonisa ukuthi iChina, bese kuba nokuthandana nokwakhiwa kwezinkulungwane eziyishumi kuya kwayo.
Inkinga ukuthi ochwepheshe bavame ukungakwazi ukwahlukanisa izinsalela zezinja ze-Pleistoce kusuka ezimpisi, ezazingafani kakhulu nangokwemvelo noma ngofuzo. Ngakho-ke, ababhali bomsebenzi omusha babheka ukuvela kofuzo kwezinja ngokufana nokuvela okufanayo kwezakhamizi zasendulo zaseSiberia, iBeringia naseNyakatho Melika. Ososayensi bathole ukuthi amaqembu okuqala abazingeli bezinja avele ngokukhanya okusha eminyakeni eyizinkulungwane eziyi-15 eyedlule, futhi i-prehistory yawo ingalandelwa kuze kube yiSiberia, eminyakeni eyizinkulungwane ezingama-22,8 edlule.
Kwakuyinkathi enkulu yokugcwala kokugcina, lapho yonke indawo ethathwa njengesifunda esithathwa njengengathandeki kakhulu empilweni, ibanda futhi yomile. Kwakuyilezi zimo ezingaphoqa abantu bezimpisi ukuba basondele kubantu ukuthola amathambo nenyunyana, futhi basebenzisane kakhulu nabo. Ngokuhamba kwesikhathi, lokhu kwaholela ekuthuthukiseni ubudlelwano obusondelene kanye noshintsho kwezilwane zasendle ezilwaneni ezintsha, ezivele zisezifundweni ezifuywayo.
Ukusuka lapha, indawo yabo yokuhlala yaqala ukuya entshonalanga nasempumalanga, kufinyelela eMelika. "Kudala sazi ukuthi abantu bokuqala bezwekazi sebevele benobuchwepheshe obuthuthukile bokuzingela, ukucubungula ngamatshe nezinye izinto futhi bakulungiselele ngokuphelele izivivinyo ezintsha, omunye wababhali be-New sebenza. "Izinja ezihambisane nazo selokhu kwavelakala ezweni elisha ngokuphelele kungaba yingxenye ebalulekile yalesi siko, njengamathuluzi amatshe aqhubeka nawo."
Umthombo: Isayensi Enqunu