A mass migration of males transformed the genetic make-up of people in Spain during the Bronze Age, a study reveals. DNA evidence shows the migrants streamed over the Pyrenees, replacing existing male lineages across the region within a space of 400 years.

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A mass migration of males transformed the genetic make-up of people in Spain during the Bronze Age, a study reveals. DNA evidence shows the migrants streamed over the Pyrenees, replacing existing male lineages across the region within a space of 400 years.