Ainu - Jomon influences.
"Likewise, American Indians seem as different, for instance plains Indians, SouthWestern Indians, and Southeastern Indians don't look at all like each other."
Of all things, I read a study on ear wax...seems Europeans and Africans have a sticky wax and Asians have a flaky wax. Further...The Indians in the west (US) have predominately the flaky variety while the Indians in the east have the sticky kind. Who knows...
LOL! I'm part Indian with blood from more than one Tribe. Some days my ear wax is sticky and some days its flaky. That must be what they mean by half-breed!