A New Twist on Human Origins

For years anthropologists believed modern humans descended from the older (archaic) forms of humans in their regions (Asians from Homo Erectus, Europeans from Neanderthals, Africans from Homo Erectus in Africa with some interbreeding). But then genetic analysis indicated a single origin in Africa. Now a new theory based on more complete genetic analysis suggests that migrating waves out of Africa assimilated existing archaic humans into their genes.

Why it is not obvious that Neanderthal genes survived into at least some present day human lineages is beyond my reckoning.