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Who are the British? Genetic map reveals their ancestry

The finest scale genetic map of any country offers a detailed look at the history and ancestry of the people of the British Isles, Nature News reports. Scientists analyzed the DNA of thousands of living people in Britain​ for a study reported in this week's issue of Nature and ​found that many still live where their distant ancestors did, in regions defined by ancient tribal kingdoms. The study also found that today's Welsh have the most ​genes in ​common with the earliest inhabitants of the islands, who arrived about 10,000 years ago. ​​Invaders such as the Vikings and the Romans left less of a genetic legacy than expected, although 25% of the genome of people in the far north Orkney Islands stems from the Vikings.