Did Vikings possess superior ancient technology ahead of their time?

Can archaeologists solve the puzzle of this old Scandinavian mystery?

Whose name is inscribed on this enigmatic ancient sword?

We may think we know a lot about Vikings. They are often portrayed as crude people that should be feared. We tend to forget that some of their ancient artifacts have remained a puzzle for years.

Among them, we find the mysterious Ulfberht sword, a very advanced weapon from thousands of years ago. Archaeologists have been trying to figure out how the Vikings could use such pure metal.

What made the Ulfberht blades so advanced?

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