Genes and Jews.
And you thought Spock
came up with that part of the shtick. It turns out that despite the racial and ethnic diversity of the Tribe, there are genetic markers that identify Cohanim, or the priestly descendants of Aaron (know any Cohens?). These markers help identify jewish identity in the most distant reaches of the diaspora.
The fascinating intersection of anthropology, genetics, and religion.
(btw first fpp)