<prompt> Fingqa isihloko: Ucwaningo olusha luthi abantu bokuqala ababehlala e - Afrika eminyakeni ecishe ibe yizigidi ezimbili edlule babenezimo nobukhulu obuhlukahlukene, njengabantu banamuhla. Abacwaningi baye bathola ukuthi ezinye izinhlobo zazimfushane - ziphakeme ngamamitha angaphansi kwamahlanu - kuyilapho ezinye zazingaba amamitha angaba yisithupha ukuphakama. Lolu cwaningo lungolokuqala eminyakeni engu-20 ukuqhathanisa ubukhulu bomzimba wabantu ababephila eminyakeni ephakathi kwezigidi ezingu-1,5 nezingu-2,5 edlule. Ucwaningo olusha luthi abantu bokuqala ababehlala e - Afrika eminyakeni ecishe ibe yizigidi ezimbili edlule babenezimo nobukhulu obuhlukahlukene, njengabantu banamuhla. Lesi sithombe sibonisa isidumbu se- Nariokotome Boy Homo ergaster Izinhlobo ezintathu ngokuvamile ziyaziwa ukuthi zazizulazula e-Afrika phakathi nalesi sikhathi: i-Homo habilis, i-Homo rudolfensis ne-Homo ergaster. Umcwaningi uDkt. Jay Stock, woMnyango Wezemivubukulo Nezenhlalo eYunivesithi yaseCambridge, wathi: Uma othile ebengakubuza ukuthi ingabe abantu banamuhla bangamamitha ayisithupha ubude namakhilogremu angu-70? ubungathi eqinisweni, abanye bangabantu abanjalo, kodwa abantu abaningi ababona, futhi lokho esiqala ukukubonisa ukuthi lokhu kwehlukahlukana kwenzeka ekuqaleni kakhulu kokuziphendukela kwabantu. Cishe ukudla kanye nezimo zendawo ezikuzungezile zaba nengxenye ekwenzeni abanye abantu bokuqala babe bakhulu kunabanye. Ochwepheshe futhi bakholelwa ukuthi ukuhluka ngokobulili ukungafani okuphawulekayo kokubukeka phakathi kwabesilisa nabesifazane, njengobukhulu kungenzeka nakho kwaba nendima. Nokho, cishe wonke amaqembu afundwayo... ahlanganisa abantu abancane nabakhulu futhi ukuhlola ubulili ngokusekelwe ezinsaleleni ze-postcranial ezihlukanisiwe neziyizingcezu ze-Homo yasekuqaleni cishe akunakwenzeka, bathi ocwaningweni. Okunye okungenzeka, okucatshangwa ukuthi akunakwenzeka kangako, ukuthi kwakunezinhlobo eziningi ezazingezomkhaya wesintu i - Homo ezahlukahluka ngokubukeka. Ukulinganiswa kwezinsalela ezivela ezindaweni eziseKenya, eTanzania, eNingizimu Afrika, naseGeorgia empumalanga Yurophu, kwembula ukuhlukahluka okukhulu kwesifunda ngosayizi wabantu bokuqala phakathi neNkathi Yeqhwa yokugcina. Amanye amaqembu, njengalawo ahlala e - Olduvai, eTanzania, ayelinganisa isilinganiso samamitha angu - 4,8 kuphela, kuyilapho lawo avela esifundeni saseKobi Fora eKenya...  <response>: Ochwepheshe basungula indlela yokubala ukuphakama nesisindo somzimba sabantu besebenzisa izingcezu ezincane zezinsalela, ezinye zazo ezazingekho ngaphezu kwezinzwane. Abacwaningi bathole ukuthi abantu bokuqala babephakathi kwamamitha angu - 1, 4 kuya kwangu - 1, 8. Kuthiwa okhokho bethu bashiya i-Afrika ngenxa yokuthi baba nemilenze emide. Kodwa lolu cwaningo lusikisela ukuthi kungenzeka ukuthi kwakukhona omunye amandla ashukumisayo. Ochwepheshe bathi izimo zendawo zingase zibangele ukwakheka kwalezi zinhlobonhlobo. Lokhu kusikisela ukuthi usayizi womzimba awuyona imfanelo engaguquki yohlobo oluthile. Kungukucwaninga kokuqala eminyakeni engu-20 ukuqhathanisa ubukhulu bomzimba wabantu ababephila eminyakeni ephakathi kwezigidi ezingu-1,5 nezingu-2,5 edlule. 