Here you can see a stone flute. The strange thing is that the vibration of the sound of these stone flutes is exactly the same as our brainwaves. So that means maybe those flutes were used for meditation or for healing purposes. And each two holes are connected perfectly with each other. That means you can make perfect holes into this very, very hard stone, but how you connect, with simple tools, the two holes on the bottom? This would be even in our days a very difficult work to do.





BR: Because it's in the shape of a "U" and it curves round inside the stone?



KD: That's right, and with simple tools you are definitely not able to do such a work; and even the holes are very precise.

