Soo koob maqaalka:  waa qaar ka mid ah deegaanada ugu qaniga badan caalamka, laakiin sidoo kale dadka waxaa ugu adag in ay ku noolaadaan. Hada, saynisyahannadu waxay ogaadeen in dadku ay bilaabeen inay ku noolaadaan keymaha roobka qiyaastii 20,000 oo sano kahor - 12,000 oo sano ka hor intii la moodayay. Baarayaasha jaamacadda Oxford waxay heleen cadeymaha ku dhex jira ilkaha aadanaha ee laga helay kaymaha Sabaragamuwa ee koonfurta Sri Lanka. saynisyahannadu waxay ogaadeen in dadku ay bilaabeen inay ku noolaadaan kaymaha roobka qiyaastii 20,000 oo sano ka hor - 12,000 oo sano ka hor intii la moodayay. Cilmi baadhayaal ka tirsan jaamacadda Oxford ayaa helay cadeymaha ku dhex jira ilkaha aadanaha ee laga helay kaymaha roobka ee Sabaragamuwa ee koonfurta Sri Lanka (sawirka). Daraasaddu waxay sidoo kale xustay inay jiraan tilmaamo muujinaya in dadku ay xitaa qabsadeen keymaha roobka qiyaastii 45,000 sano ka hor. Sida laga soo xigtay saynisyahannada, Neanderthals waxay abuureen oo xireen dahabkii ugu horeeyay aduunka 130,000 sano kahor. Cilmi baadhayaal baadhaya sideed qabatood oo laga soo qaatay gorgor caddaan ah oo laga helay Krapina ee Croatia ayaa sheegaya in loo isticmaalay in lagu sameeyo silsilad ama jijin. faraha waxay leeyihiin calaamado go'an oo kala duwan, calaamado iyo astaamo muujinaya in ay ahaayeen kuwo la shiilay oo ay sameeyeen dadka Neanderthal-ka ee daganaa halkii laga helay. Khubarada cilmiga biniaadamka ee jaamacada Kansas waxay sheegeen in qabyaalada ay u muuqato in lagu sameeyay dahab calaamad u ah 80,000 oo sano ka hor intaanay dadku imaanin yurub. Waxyaalaha la helay waxay cadayn u yihiin in Neandertal-ku uusan aheyn dad caqligoodu gaabis yahay sida badanaa la sheegay. Waxyaabaha la helay waxay ka soo horjeedaan fikradda ah in keymaha kulaylaha ay ahaayeen deegaan aan bini aadam ku jirin ilaa 8,000 oo sano ka hor. Professor Julia Lee-Thorp, oo ah cilmi baadhe cilmiga qadiimiga ah oo ka tirsan jaamacadda Oxford University, oo ka qayb qaatay hogaaminta daraasadda, ayaa tiri:'Habka isotopic-ka ee daraasaddeena lagu sameeyay ayaa horey loogu isticmaalay si guul leh si loo barto sida primates, oo ay ku jiraan daanyeerada waaweyn ee Afrika, ay ula qabsadaan deegaankooda kaynta....
Saynisyahano ka tirsan jaamacadda Oxford ayaa falanqeeyay isotope-yada ilkaha aadanaha ee qadiimiga ah. Ilkaha waxaa laga helay kaymaha roobka ee Sabaragamuwa ee Sri Lanka. Cilmi baadhayaashu waxay ogaadeen in ilkahaasi ay ka yimaadeen dad cunay cuntooyinka kaymaha roobka. Taas macnaheedu waa in dadku ay ku noolaayeen kaymaha roobka 12,000 oo sano ka hor intii la moodayay. Dhirta roobka waxaa la aaminsanaa in aanay dadku ku noolaan karin ilaa 8000 oo sano ka hor.