text: We investigated regional differences in non-local ancestry across 
  Scandinavia. In Denmark, 25 out of 53 Viking Age individuals had detect- 
  able (*z-*score > 1) central European-related ancestry (CentralEurope. 
  IronRoman or Portugal.IronRoman) in their best accepted qpAdm 
  models. In Sweden 20 out of 62 individuals had detectable central 
  European-related ancestry, concentrated almost entirely in southern 
  regions (Fig. 4a,d). By contrast, in Norway, this ancestry was observed 
  in only 2 out of 24 individuals, indicating a wide-ranging impact of 
  incoming ancestry in southern Scandinavia and suggesting more 
  
  Nature | Vol 637 | 2 January 2025 |**123**