Check out this passage from a book I am reading:

The eardrum is connected to three tiny, loosely hinged bones inside the middle ear. Each bone is delicate and exquisitely shaped. One looks like a hammer and is called by its Latin name, malleus. The next, the incus, looks like an anvil. And the third, the stapes, looks like a stirrup. When the eardrum vibrates, these bones vibrate in tune with its movement and with the movement of the air.

Three bones make all the sound you hear in your head! This sort of thing blows my mind, and yet I gave up biology at 15.

Maybe if my biology teacher had linked it all to music I would have paid attention.