Apparently the planned blog post for both Friday and yesterday never got through - if you can rely on anything, it's modern technology doing weird things once in a while.
To make it up for you, I have something very special today: A mystery! This piece of bone was found in a dig in Austria. It's rib bone of either horse or cow, with sawed-off sides (not polished or smoothed). Both lengthwise edges are worn smooth or wear-polished.
If you've seen anything like this before, or have an idea for what it could have been used, please let me know!