Fascinating facts about ears and hearing

The middle ear is no bigger than an M&M.
The cochlea (inner ear) is about the size of an eraser.
The ear never stops working. Even when people are asleep, the ear continues to hear sounds, but the brain shuts them out.
In Africa, a tribe of people call Maabans live in such quiet that they can hear a whisper from across a baseball field.
For several years now, the military has used bone conduction in headsets for soldiers. The near negligible impedance from outside sounds can be used to provide better radio transmissions for communications systems in the field.

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