Kungani iSahara yaba ugwadule ngokushesha?
Context:Kusukela kudala ubukhulu beSahara buye bahlukahluka kakhulu, indawo yayo ishintsha ngokushesha futhi ngezinye izikhathi iyanyamalala kuye ngezimo zezulu zomhlaba wonke. Ekupheleni kweNkathi Yeqhwa, okwalinganiselwa ukuthi kwakungu-10,500 BCE, iSahara yaphinde yaba yisigodi esivundile esiluhlaza, futhi abantu bayo base-Afrika babuya bevela ezindaweni eziphakeme ezingaphakathi nasogwini ezise-Afrika engaphansi kweSahara, nemidwebo yobuciko yamadwala ekhombisa iSahara evundile kanye nabantu abaningi abatholakala eTassili n'Ajjer cishe eminyakeni eyizinkulungwane eziyi-10. Nokho, isimo sezulu esifudumele nesomile sasho ukuthi ngo-5000 BCE, isifunda saseSahara sasisiba esomile futhi singenabo ubungane. Cishe ngo-3500 B.C.E., ngenxa yokuthambekela komjikelezo womhlaba, iSahara yabhekana nenkathi yokuchitheka kwamahlathi ngokushesha. Abantu basuka esifundeni saseSahara baya esigodini saseNayile ngaphansi kweCataract yesiBili lapho benza khona izindawo zokuhlala unomphela noma ezingahlali isikhathi eside. Kwaba nokwehla okukhulu kwesimo sezulu, okwanciphisa izimvula ezinamandla neziqhubekayo eAfrika Ephakathi neseMpumalanga. Kusukela ngalesosikhathi, izimo ezomile ziye zaba khona eMpumalanga Afrika futhi, ngokwandayo phakathi neminyaka engu - 200 edlule, e - Ethiopia.
ISahara yabhekana nenkathi yokuchitheka kwamahlathi ngokushesha ngenxa yokuthambekela komjikelezo womhlaba.