Designer Matthias Kaeding is looking to the past for design way in the past. His ceramic knives mimic those you might find in a cave during the Stone Age.

And really, why not? It may only be a concept, but if you have ever seen someone cut up meat with a hunk of obsidian or flint you know that ancient tools were wicked sharp. Plus, the fact that many survive today is a testament to durability. Although I think a handle might be in order here. I mean, I don't want to make it too easy to chop my finger off. [Matthias Kaeding via Dezeen via Boing Boing Gadgets]