2015. május 30., szombat

How Did The Ancient Vikings Make This Super-Strong Sword?

When we look at the history of new technologies, we tend to think of only our most recent past. But more than a thousand years ago, blacksmiths succeeded in making a set of ultra-strong swords — that are tricky to re-create even today.

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from Gizmodo http://ift.tt/1ADowwq
via Gizmodo

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