Ygorcs
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I decided to post this doubt of mine here so that someone might perhaps help clarify what's happening with the average population DNA sample named TZA_Zanzibar_FirstMillennium in Global25 datasheets. I have googled to try to find the paper that that sample comes from, but couldn't find it. The issue is that, running the sample into nMonte software to model its ancestry, it's clear that it's just too much of an outlier to be believed: the sample is closest to ancient Iberian samples and, among modern populations, also to Iberians. Okay, I wouldn't be totally surprised by a Portuguese trader/sailor being buried in Zanzibar in the 16th or 17th century (though I still think that would be a real find, as they must've been a tiny minority of the total population), but first millennium? Does anyone have any information about that DNA sample, the study that analyzed and released it, the dating and archaeological circumstances? For now I'll just assume that the labeling was totally wrong and it in fact dates to the last centuries.