This article completely ignores the discovery of crucible steel use in Viking swords like the Ulfberht, whose isotopic analysis supposedly points to Persian ori

This article completely ignores the discovery of crucible steel use in Viking swords like the Ulfberht, whose isotopic analysis supposedly points to Persian origin, obtained through trade. There was a great PBS "Nova" episode on this called "Secrets of the Viking Sword"; transcript available at: http://www.stickgrappler.net/2013/07/nova-secrets-of-viking-sword-2012-full.html?m=1 http://www.stickgrappler.net/2013/07/nova-secrets-of-viking-...