Fish do not have ears, but they can hear pressure changes through ridges on their body. The ear’s malleus, incus and stapes (otherwise known as the hammer, anvil and stirrup) are the smallest bones in the human body. All three together could fit together on a penny. The ear continues to hear sounds, even while you sleep.

Hearing loss is the third most common health problem in the United States. Excessive noise exposure is the #1 cause of hearing loss. The bones in the middle ear (malleus, incus, and stapes) are the body’s smallest bones. All three can fit together on the surface area of a penny. 37% of children with hearing loss fail at least one grade.