Inkyd from a photo by Edward Curtis.

I vaguely recall reading a book about the hypothesis that the India Indians were in fact actually related in a linear fashion to the American Indian, specifically the Navajo. Something about similarities between the Navajo religion and Buddhism. I don’t know how true this is (but could guess), but I like the notion of cultures diverging for a long time, then eventually getting back together to compare, contrast, and share stories.