0 0 ▁years ▁old ▁respectively . ▁These ▁foss ils ▁seem ▁to ▁represent ▁failed ▁dispers al ▁attempts ▁by ▁early ▁H omo ▁s api ens , ▁who ▁were ▁likely ▁replaced ▁by ▁local ▁Ne ander th al ▁populations . ▁ ▁The ▁migr ating ▁modern ▁human ▁populations ▁are ▁known ▁to ▁have ▁inter bre d ▁with ▁local ▁vari eties ▁of ▁arch a ic ▁humans , ▁so ▁that ▁contemporary ▁human ▁populations ▁are ▁desc ended ▁in ▁small ▁part ▁( below ▁ 1 0 % ▁contribution ) ▁from ▁regional ▁vari eties ▁of ▁arch a ic ▁humans . ▁ ▁After ▁the ▁Last ▁Gla cial ▁Max imum , ▁North ▁E uras ian ▁populations ▁migr ated ▁to ▁the ▁Amer icas ▁about ▁ 2 0 , 0 0 0 ▁years ▁ago . ▁Northern ▁E uras ia ▁was ▁pe op led ▁after ▁ 1 2 , 0 0 0 ▁years ▁ago , ▁in ▁the ▁beginning ▁Hol oc ene . ▁Ar ctic ▁Canada ▁and ▁Green land ▁were ▁reached ▁by ▁the ▁Pale o - E sk imo ▁expansion ▁around ▁ 4 , 0 0 0 ▁years ▁ago . ▁Finally , ▁Pol yn esia ▁was ▁pe op led ▁within ▁the ▁past ▁ 2 , 0 0 0 ▁years ▁in ▁the ▁last ▁wave ▁of ▁the ▁Aust ron esian ▁expansion . ▁ ▁Early ▁humans ▁( before ▁H omo ▁s api ens ) ▁ ▁The ▁earliest ▁humans ▁developed ▁out ▁of ▁austral op it he c ine ▁ancest ors ▁after ▁about ▁ 3   mill ion ▁years ▁ago , ▁most ▁likely ▁in ▁Eastern ▁Africa , ▁most ▁likely ▁in ▁the ▁area ▁of ▁the ▁Ken