Abantu bokuqala bavela eMhlabeni eminyakeni eyizigidi ezi-4 edlule, kodwa ubufakazi obumbalwa bocwaningo lokuziphendukela kwemvelo komuntu buye bathola ubufakazi obugculisayo bokuthi, esikhathini esidlule, izivakashi zakwamanye amazwe ezithuthuke kakhulu emhlabeni zashintsha ngofuzo ingxenye ethile yalezi hominins ukuze ikhiqize eyokuqala. Homo sapiens.
Iminyaka embalwa, uDaniella Fenton, umcwaningi kanye nomlobi, ubelokhu enza uphenyo olunzulu ngemvelaphi yokuqala yesintu kanye nokusheshisa kwayo okungazelelwe ekukhuleni kobuchopho eduze neminyaka eyi-800,000 edlule; umsebenzi wakhe uphumele ekwambulweni okubalulekile:
Homo sapiens bayinzalo yosomkhathi basendulo abafika eminyakeni engama-780,000 edlule ngembobo yomungu Iqoqo lenkanyezi ye-Pleiades.
Umcwaningi wase-Australia, uchwepheshe we-horse bloodlines kanye nokubonakaliswa kofuzo wathola izinguquko eziningi zofuzo ezihlukanisa abantu nezinhlobo zamanje zezinkawu, ezinye zazo ezimangalisa kangangokuthi zingachazwa kuphela ngobunjiniyela bezakhi zofuzo.
Incwadi kaDaniella Fenton, 'IHybrid Humans: Ubufakazi Besayensi Befa Lethu Elidala Leminyaka Engu-800,000,' iveza ukulandelana kwezinguquko ezinkulu ezakhini zofuzo ezihlobene nokukhula kobuchopho, ukwakheka kwemizwa, kanye nokucutshungulwa kolwazi. Izakhi zofuzo ezivela kungazelelwe zakhiwe ngokuphelele kulokho okubizwa ngokuthi "i-DNA engcolile" futhi izingxenye zezakhi zofuzo ezikhishiwe, zaphindwa, futhi zaphinde zafakwa ziyizibonelo zalokhu kulungiswa.
U-Fenton ubona ukuhlangana okungaqondakali kwe-Chromosome-2 cishe eminyakeni engu-780,000 edlule, ngesikhathi esifanayo nalezi ezinye izinguquko, njengobufakazi obengeziwe bokukhohlisa kwe-alien. Lokhu kuhlangana kwenzeka kuzo zonke izinhlobo zabantu abanobuchopho obukhulu, okuhlanganisa amaNeanderthal namaDenisovan, kodwa hhayi kunoma yiziphi ezinye izinhlobo zezilwane ezimfene.
Uthi ukuhlanganiswa kwe-chromosome-2 bekumele kube yiphutha lesikhathi esisodwa elizoshabalala esizukulwaneni esilandelayo, noma kungenzeka ukuthi kubangele umphakathi omncane wabantu onama-chromosome angama-46 phakathi kwesibalo sabantu abangama-48. Kunalokho, uguquko lwabonakala kubo bonke abantu eminyakeni engu-780,000 edlule.
Lokhu, ngokuka-Fenton, kuphakamisa ngokusobala ukuthi ukuhlanganiswa kube nenzuzo enkulu futhi kwavela kungazelelwe enanini elikhulu labantu (ngamabomu), okuvumela i-chromosome-2 ukuba ibe isici esihlala njalo nesibusayo. Lokhu akuhambisani nanoma yikuphi ukuguqulwa kwemvelo okwaziwayo ku-genome yomuntu.
“Othile wakha isizukulwane sonke sabalingani abazalanisayo ababequkethe ukuhlanganiswa kwe-chromosome-2,” Kuchaza uFenton. "Ukuguqulwa kwe-chromosomal kungaba nomthelela ekukhuleni kobuchopho, isimiso sokuzivikela komzimba, kanye nemisebenzi yokuzala."
Abantu futhi banokuguquguquka okuyingqayizivele kufuzo i-FOXP2, eguqule ukuxhumana kwe-synaptic futhi yathuthukisa amandla ethu okuguqula okuhlangenwe nakho kwenoveli kube izindlela ezijwayelekile; lokhu kube nomthelela omkhulu ekhonweni lethu lokukhuluma inkulumo ezuzisayo.
NgokukaFenton, lolu shintsho alubonwanga kwezinye izilwane ezifuywayo, futhi luphakamisa ukuthi abaklami bethu babehlose ukuthi sikwazi ukuthola ngokushesha ukuziphatha okusha okuvamile, ikakhulukazi ukusetshenziswa kolimi.
“Akukhona nje izinguquko zofuzo eminyakeni engu-780,000 XNUMX edlule ezisitshela ukuthi iHomo sapiens iwuhlobo oludalwe izidalwa ezingaziwa; siphinde sahlonza izinto ezibonakalayo ezishiywe yilaba bantu bezinkanyezi, izinto ezifika ngaleso sikhathi ngesikhathi,” Kusho uFenton.
Encwadini yakhe ethakazelisayo, uDaniella Fenton uchaza ngokuningiliziwe kungani lezi zivakashi zasala dengwane lapha emhlabeni kanye nezisusa ezabaholela ekuguquleni ama-hominins okuqala.
