If you like music or history or science or all of the above you will be facinated by this story and the video below.
The short of it is that some people discovered a musical notation system embeded in the stone in a Scottish Church. They were able to decode it and now the music is being sung again. I can't describe the coolness of the notation system better than the video shows it, but basically the notation is a picture of what the soundwaves look like, so it is possible to specify an exact pitch.
Watch the video!