▁would ▁since ▁have ▁been ▁covered ▁by ▁a ▁sea ▁level ▁rise ▁of ▁a ▁hundred ▁meters ▁following ▁the ▁last ▁ice ▁age . ▁ ▁Arch ae olog ists ▁cont end ▁that ▁the ▁Pale o - Ind ian ▁migration ▁out ▁of ▁Ber ing ia ▁( e astern ▁Al aska ), ▁ranges ▁from ▁ 4 0 , 0 0 0 ▁to ▁around ▁ 1 6 , 5 0 0 ▁years ▁ago . ▁This ▁time ▁range ▁is ▁a ▁hot ▁source ▁of ▁debate . ▁The ▁few ▁agre ements ▁achieved ▁to ▁date ▁are ▁the ▁origin ▁from ▁Central ▁Asia , ▁with ▁w ides p read ▁habit ation ▁of ▁the ▁Amer icas ▁during ▁the ▁end ▁of ▁the ▁last ▁gla cial ▁period , ▁or ▁more ▁specifically ▁what ▁is ▁known ▁as ▁the ▁late ▁gla cial ▁maximum , ▁around ▁ 1 6 , 0 0 0 ▁– ▁ 1 3 , 0 0 0 ▁years ▁before ▁present . ▁ ▁The ▁American ▁Journal ▁of ▁Human ▁Gen et ics ▁released ▁an ▁article ▁in ▁ 2 0 0 7 ▁stating ▁" Here ▁we ▁show , ▁by ▁using ▁ 8 6 ▁complete ▁mit och ond rial ▁genom es , ▁that ▁all ▁Ind igen ous ▁American ▁ha p lo groups , ▁including ▁H ap lo group ▁X ▁( mt D NA ), ▁were ▁part ▁of ▁a ▁single ▁found ing ▁population ." ▁Amer ind ian ▁groups ▁in ▁the ▁Ber ing ▁Stra it ▁region ▁exhib it ▁perhaps ▁the ▁strong est ▁DNA ▁or ▁mit och ond rial ▁DNA ▁relations ▁to ▁Si ber ian ▁pe op les . ▁The ▁gen etic ▁divers ity ▁of ▁Amer