I came across this article, and I thought people might find this interesting. (It includes maps.)
https://www.wired.com/2017/02/770000-tubes-spit-help-map-americas-great-migrations/Ancestry is one of the three major companies doing DNA testing, and they've collected DNA from 770,000 customers. One of their services is to link up people sharing unbroken strands of DNA. (Generally speaking, these are people related within about 8 generations, give or take.)
Anyhow, they did statistical analysis of their data, and they were able to cluster people into groups, and they mapped the groups.
Or at least, I think this is what they did; I didn't read that closely.
Anyhow, pretty maps.
