Nature: A new study of Y chromosomes in British men shows that the Celtic influence is stronger than originally thought. The influence of the Anglo-Saxons in England has been well-documented, leading to the belief that Brits were strongly Anglo-Saxon in their genetic make-ups, but a new study may prove that the influence is much less. A survey of Y chromosomes throughout the British Isles shows that the Celts had a much stronger influence than previously believed, particularly in Scotland and Wales, where DNA resembles that of the Basques of France and Spain. Anglo-Saxon influence remains strong in eastern England and mainland Scotland, where raiders tended to settle.