text: Interestingly, we detect ancestry from Bronze and Iron Age sources 
  from Eastern Europe (present-day Lithuania and Poland), concentrated 
  in southeastern parts of Sweden, particularly the island of Gotland 
  (14 individuals; Fig. 4a). This is consistent with previous genetic 
  studies6,7. We find that this ancestry is enriched in male individuals 
  (Extended Data Fig. 7d), suggesting male-biased mobility and/or burial. 
  The closest match tends to be Roman Iron Age Lithuanian genomes 
  associated with Balts, which would be consistent with mobility across 
  the Baltic Sea, but we caution that the geographical representation of 
  available genomes is still limited. 
  
  **Online content**
  Any methods, additional references, Nature Portfolio reporting summa- 
  ries, source data, extended data, supplementary information, acknowl- 
  edgements, peer review information; details of author contributions 
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  are available at https://doi.org/10.1038/s41586-024-08275-2. 
  
  **Viking Age expansion from Scandinavia**
  Traditionally, historical perspectives on what is now often referred 
  to as the Viking diaspora placed an emphasis on the movements and 
  settlements of population groups from various parts of Scandinavia67. 
  Our explorative MDS analysis again indicates mixed ancestries related 
  to the Scandinavian EIA, with regional differences that point to varied 
  local admixture (Fig. 4e and Extended Data Fig. 10). 