You know, as in flints. I find these all over the place around where I live, and the people who were here had been making these primitive - but really effective - tools for near on half a million years. It's just remarkable. All we'll leave behind is a layer of plastic.
Don't forget to grab the editable eps and use the character for your project, or smash it up and send me a copy back. The edit's I'll feature here as a changelog to track its development.