bill,

not long ago i watced a programme on channel 4 uk about the genetic links between all the humans on earth

there was a lot of science but the conclusion was that we're all related to each other as homo sapiens regardless of later adaptations leading to physical racial characteristics

i also saw a survey on another tv item about how much viking genes existed in the present day in the wirral peninsula [cheshire 'n wirral counties] of north west england. apart from some links in neston, there were scarcely any, despite the fact that almost all settlements in this area have place names linked to scandinavia.