Nearly two years ago, divers Raffi Bahalul, Shlomi Katzin and Ehud Galili found an iron Crusader-era sword in the Mediterranean Sea off the coast of Israel.
It was encrusted with marine organisms, which protected the metal and left it in amazing condition for an artifact about 800 years old.
Now, the Israel Antiquities Authority and the Soreq Nuclear Research Center have published results of tests on the ancient sword.