Distinctive Basal-East Asian (East-Eurasian) ancestry was recently found to have originated in Mainland Southeast Asia at ~50,000BC, and expanded through multiple migration waves southwards and northwards respectively. Geneflow of East Asian-related ancestry into Maritime Southeast Asia and Oceania could be estimated to ~25,000BC (possibly also earlier). The pre-Neolithic Papuan-related populations of Maritime Southeast Asia were largely replaced by the expansion of various East Asian-related populations, beginning about 50,000BC to 25,000BC years ago from Mainland Southeast Asia. The remainders, known as Negritos, form small minority groups in geographically isolated regions. Southeast Asia was dominated by East Asian-related ancestry already in 15,000BC, predating the expansion of Austroasiatic and Austronesian peoples. left|thumb|The Austroasiatic and Austronesian expansions into Maritime Southeast Asia. In the late Neolithic, the Austronesian peoples, who form the majority of the modern population in Brunei, Indonesia, East Timor, Malaysia, and the Philippines, migrated to Southeast Asia from Taiwan in the first seaborne human migration known as the Austronesian Expansion. They arrived in the northern Philippines between 7,000 BC to 2,200 BC and rapidly spread further into the Northern Mariana Islands and Borneo by 1500 BC; Island Melanesia by 1300 BC; and to the rest of Indonesia, Malaysia, southern Vietnam, and Palau by 1000 BC. They often settled along coastal areas, replacing and assimilating the diverse preexisting peoples.
distinctive baSal-EAst asian (east-EuRasIaN) aNcEstrY wAs recently founD to HAve oRiginaTeD iN maiNlAND souThEaST asIa aT ~50,000Bc, AnD expandeD throUGh MultiplE mIgratiON waveS SouThWarDs And nORthWaRds respecTiVELy. GeneFlow OF easT asian-relatEd anCesTry InTo MaRitImE sOuThEast asIa And Oceania Could bE estimated to ~25,000bc (possIbly alSO earlIer). the pre-NeolithiC paPuaN-rElAted PopulatioNS of maritimE soutHeast asia wERe lArgeLy replaCEd by thE eXpansioN oF vARiouS EasT asian-rElaTed pOpULatIonS, bEginnIng About 50,000bc to 25,000bc yeaRs ago from mainLAnd southeAST ASia. ThE reMAinDErS, Known as NEGritos, fORm smaLl MINOritY gROuPs in geographIcaLly iSOlATed reGioNs. soutHeAst asIa WAS DomINAted by eAsT ASiaN-reLAtEd aNcEstRy already in 15,000bc, pRedAtinG tHe expaNsION Of ausTroaSiatiC anD auStrONEsIan peOPles. LEft|ThuMb|THe AustROasiatic AND AuStroNeSIan eXpansions into MarITiMe soUTHeAst AsIa. In thE lATe nEOLIthIc, the ausTronEsIan peoPLeS, Who forM tHE majority of tHe modeRN populaTion iN BruNei, indonEsia, east timOR, MalaysiA, anD thE phIlIppINes, MigrAtED tO SOutheast asia fROm TaiwAn IN the FIrst seAborNe huMan migrAtIon KnowN aS ThE AuSTrOnESiaN exPAnsIoN. thEy arrIvED IN thE nOrtHeRN PhIliPpineS betWeen 7,000 bc TO 2,200 Bc and RaPidly sPReaD fuRthEr IntO the nORTherN mariana IsLAnDs and BOrneo by 1500 bc; islaND mELaNESiA bY 1300 Bc; and tO the resT of iNdOneSIa, mAlAysia, soUthern vIeTnam, aNd Palau by 1000 Bc. they often sEtTled alONg coastaL aReas, repLAciNg AnD assiMilAtiNG The divErse PReexIsting pEoPlEs.