Soo koob maqaalka:  cagaha ugu da'da weyn ee dadku ku daadiyeen xeebta harada dhoobada ah 1.5 milyan oo sano kahor waxay u muuqataa in ay sameeyeen kooxo ugaarsi ah oo taariikhda ka horeysay. Cilmi baadhayaasha baadhaya goobta ay ku yaalaan raadadka fara badan ee dad caga-la'aani hore uga tageen Ileret, waqooyi galbeed Kenya, waxay hadda heleen wadar ahaan 99 raad. Waxay haatan aaminsan yihiin in ay ka tirsan yihiin kooxo wada maray dhoobada jilicsan isla waqtigaas - laga yaabee xitaa in ay daba socdeen xayawaan kale oo raadkoodu sidoo kale lagu keydiyay dhoobada. raadadka la helay Ileret ee Kenya (sida tan kor ku xusan) waa kuwa ugu da 'da weyn raadadka aadanaha aduunka. waxay bixisaa caddeymo adag oo ah in bini'aadamka kasoo jeedo ee raadadka iska daayay - Homo erectus - ay ahaayeen ugaadhsadeyaal heer sare ah. Halka awoowayaashood ay ka cuni jireen hilibka ay gurtaan ama hilibka ugaadha yar yar ee ay awoodaan in ay qabtaan, kooxda ugaadha waxay soo jeedinayaan in Homo erectus uu ka daba tagey ugaadha weyn. Awoowayaashii hore ee aadanaha waxaa laga yaabaa inay u soo baxeen inay tuuraan waranka iyaga oo u oggolaanaya inay ugaarsadaan qiyaastii laba milyan oo sano ka hor, daraasad cusub ayaa soo jeedisay. Cilmi baaris uu sameeyay Dr. Neil Roach ayaa muujisay in lafdhabarta dadka loo yaqaano Homo erectus ay lahaayeen garbaha iyo lafta qoorta taasoo u saamaxday inay usha ku tuuraan si sax ah una xoog badan. waxay sahleysaa ninka loo yaqaano Homo erectus in uu noqdo ugaarsi tayo leh, oo ku ridan kara hub sida marooyinka iyo dhagaxa kuwaasoo uu ku garaaci karo wax uu doonayo Dr. Neil Roach, oo ah khabiir ku takhasusay cilmiga bini aadamka ee matxafka taariikhda dabiiciga ee Mareykanka ee New York oo hogaaminayay daraasadda, ayaa sheegay in sawirada ay u muuqdaan inay sameeyeen ragga qaangaarka ah. wuxuu sheegay in raadadka ay matalaan kooxo ugaarsada xayawaanada sida antelope ama wildebeest. Isaga oo la hadlaya Nature, Dr Roach wuxuu yiri: 'Waxa aan dhihi karno waa inaan haysano tiro shaqsiyaad ah, oo laga yaabo inay rag yihiin, oo ku socda xeebta harada si waafaqsan sida hilibka cunaha u dhaqdhaqaaqaan. Cilmi baadhayaasha, oo soo bandhigay natiijooyinkooda kulanka sanadlaha ah ee Jaaliyadda Paleoanthropology ee San Francisco, waxay rajeynayaan inay tijaabiyaan natiijooyinkooda iyagoo baranaya qaababka dhaqdhaqaaqa ugaadhsadeyaasha maanta ku nool Afrika. Wadooyinka tareenka...
Baarayaasha Matxafka Taariikhda Dabiiciga ah ee New York waxay heleen 99 cagood oo u muuqda in ay ka tageen labkii Homo erectus. raadadka - raadadka ugu da'da weyn ee aadanaha ee aduunka, waxaa laga helay Ileret, Kenya - waxaa laga yaabaa in ay ka tageen koox ugaarsata antilope ama wildebeest. Waxay tusineysaa in Homo erectus ay u badan tahay in ay ahaayeen ugaadhsadeyaal aad u horumarsan oo halis ah.