"We know that Vikings sailed to the Americas," said Agnar Helgason of deCODE Genetics and the University of Iceland, who co-wrote the study with his student Sigrídur Ebenesersdóttir and colleagues. "So all you have to do is assume … that they met some people and ended up taking at least one female back with them.
"Although it's maybe interesting and surprising, it's not all that incredible," Helgason added. "The alternative explanations to me are less likely"—for example the idea that the genetic trait might exist independently, undiscovered, in a few Europeans.
Link -Thanks, Marilyn!
(Image credit: Robert Harding Picture Library, Alamy)