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The Ghost Population
Rights are ghost population are groups that emerge out of models. Many european populations to day can be relatively well described as a mixture of three ancestral populations. We knew that already in two thousand and 14. And you can ask what those three ancestral populations look like in order to fit the data. None of those populations exist any exist today. The one that's closest to existing to day are groups present day sardinians. But even sardinian are not a perfect proxy for one of those three ancestral communities.