As such, they’re pretty damn cool, showing up in our media and especially in anime. It’s hard to list any combat anime that doesn’t bandy about a sword or two, and they’re often the weapon ...

Excalibur isn’t real. Attila’s “sword of Mars” was folklore. Also, we’ve developed some really solid ideas of how Damascus steel was made, and none of them involve metal from space.

MICHEL MARTIN, HOST: Good morning. I'm Michel Martin. A cafe in Japan came up with a cool way to fight the sweltering summer heat - ninja swords made of ice cream.