Having Your Genome "Done"

Christopher Hitchens (connect from his website to "Shalom Professor Gates" to avoid the Times free registration), writing in the LA Times, offers a brief but fascinating look at mitochondrial DNA testing, or having your genome "done" and the potential surprises awaiting us all.

The fantasy of ethnic purity is simply a fantasy, and the fantasy of racial
purity is not even a delusion, because we are all of the same race. Ex Africa
semper aliquid novi, as the Romans phrased it. There is always something new out
of Africa.

I don't think these guys will be surprised to find out Henry Louis Gates was descended from a female Ashkenazi Jew.