All That's Interesting on MSN9d
This Bronze-Age Sword Found In Denmark Is Still Sharp 3,000 Years Later
This ancient sword found on an island in Denmark is incredibly well-preserved despite dating back to 1100 and 900 B.C.E.
PBS13y
Making a Masterpiece
Katana-makers use two types of tamahagane: high-carbon, which is very hard and allows for a razor-sharp edge, and low-carbon, which is very tough and allows for shock absorption. A sword composed ...