Combined with archaic admixture this has resulted in significant genetic variation i.e. significantly later than possible archaic admixture events .
Significant genetic variation in some instances has been shown to be the result of directional selection taking place over the past 15,000 years .
Combined with archaic admixture this has resulted in significant genetic variation , which in some instances has been shown to be the result of directional selection taking place over the past 15,000 years , i.e. significantly later than possible archaic admixture events .