▁that ▁Upper ▁Pale ol ith ic ▁Si ber ians ▁came ▁from ▁a ▁cosm opol itan ▁population ▁of ▁early ▁modern ▁humans ▁that ▁spread ▁out ▁of ▁Africa ▁to ▁Europe ▁and ▁Central ▁and ▁South ▁Asia . ▁Second , ▁Pale o ind ian ▁ske let ons ▁with ▁phen ot yp ic ▁tra its ▁at yp ical ▁of ▁modern - day ▁Native ▁Americans ▁can ▁be ▁explained ▁as ▁having ▁a ▁direct ▁historical ▁connection ▁to ▁Upper ▁Pale ol ith ic ▁Si ber ia ." ▁A ▁route ▁through ▁Ber ing ia ▁is ▁seen ▁as ▁more ▁likely ▁than ▁the ▁Sol ut re an ▁hypothesis . ▁ ▁On ▁October ▁ 3 , ▁ 2 0 1 4 , ▁the ▁Oregon ▁cave ▁where ▁the ▁oldest ▁DNA ▁evidence ▁of ▁human ▁habit ation ▁in ▁North ▁America ▁was ▁found ▁was ▁added ▁to ▁the ▁National ▁Register ▁of ▁Historic ▁Places . ▁The ▁DNA , ▁radi oc ar bon ▁dated ▁to ▁ 1 4 , 3 0 0 ▁years ▁ago , ▁was ▁found ▁in ▁foss il ized ▁human ▁cop rol ites ▁un cover ed ▁in ▁the ▁P ais ley ▁Five ▁M ile ▁Point ▁C aves ▁in ▁south ▁central ▁Oregon . ▁ ▁Lith ic ▁stage ▁( before ▁ 8 0 0 0 ▁B CE ) ▁▁▁ ▁The ▁Lith ic ▁stage ▁or ▁Pale o - Ind ian ▁period , ▁is ▁the ▁earliest ▁classification ▁term ▁referring ▁to ▁the ▁first ▁stage ▁of ▁human ▁habit ation ▁in ▁the ▁Amer icas , ▁covering ▁the ▁Late ▁Ple ist oc ene ▁epo ch . ▁The ▁time ▁period ▁der ives ▁its ▁name ▁from ▁the ▁appearance ▁of ▁" L ith