▁Ab original ▁gen ome ▁from ▁an ▁old ▁hair ▁sample ▁in ▁Western ▁Australia , ▁revealed ▁that ▁the ▁individual ▁was ▁desc ended ▁from ▁people ▁who ▁migr ated ▁into ▁East ▁Asia ▁between ▁ 6 2 , 0 0 0 ▁and ▁ 7 5 , 0 0 0 ▁years ▁ago . ▁This ▁supports ▁the ▁theory ▁of ▁a ▁single ▁migration ▁into ▁Australia ▁and ▁New ▁Guinea ▁before ▁the ▁arrival ▁of ▁Modern ▁A si ans ▁( between ▁ 2 5 , 0 0 0 ▁and ▁ 3 8 , 0 0 0 ▁years ▁ago ) ▁and ▁their ▁later ▁migration ▁into ▁North ▁America . ▁This ▁migration ▁is ▁believed ▁to ▁have ▁happened ▁around ▁ 5 0 , 0 0 0 ▁years ▁ago , ▁before ▁Australia ▁and ▁New ▁Guinea ▁were ▁separated ▁by ▁rising ▁sea ▁levels ▁approximately ▁ 8 , 0 0 0 ▁years ▁ago . ▁This ▁is ▁supported ▁by ▁a ▁date ▁of ▁ 5 0 , 0 0 0 – 6 0 , 0 0 0 ▁years ▁ago ▁for ▁the ▁oldest ▁evidence ▁of ▁settlement ▁in ▁Australia , ▁around ▁ 4 0 , 0 0 0 ▁years ▁ago ▁for ▁the ▁oldest ▁human ▁remains , ▁the ▁earliest ▁humans ▁artifact s ▁which ▁are ▁at ▁least ▁ 6 5 , 0 0 0 ▁years ▁old ▁and ▁the ▁ext inction ▁of ▁the ▁Australian ▁meg af a una ▁by ▁humans ▁between ▁ 4 6 , 0 0 0 ▁and ▁ 1 5 , 0 0 0 ▁years ▁ago ▁argued ▁by ▁Tim ▁Fl ann ery , ▁which ▁is ▁similar ▁to ▁what ▁happened ▁in ▁the ▁Amer icas . ▁The ▁continued ▁use