I saw a program, I think on what was then the Military Channel, about the American Revolution. As I recall they were digging on a battlefield (I don't recall which one) and picked up a musket ball that had a very clear impression of some poor soldier's two front teeth. It was a bit disturbing for a number of reasons, not the least of which was the realization that the ball had to have continued right through the soldier's skull to be picked up 200+ years later.