Ulfberht. No, that’s not a typo. It’s the name for a special type of Viking sword that far exceeded the quality of any other European sword of its era. Where other swords would shatter, Ulfberhts were able to bend and still keep their edge. This was a huge advantage on the field of battle, where one’s life depended on the quality of his blade. Modern-day researchers have discovered that what made these swords so special was the extreme heat in which they were forged. The high temperature allowed for more impurities to be removed, resulting in a far stronger and…