Your ears never stop hearing, even during sleep. Your brain just chooses to ignore sounds and vibrations. Most living creatures hear with their ears, but not all. Snakes use their jawbones, male mosquitoes use their antennae, and fish “hear” by responding to changes in pressure.

Ears are completely individual just like fingerprints! Yahoo has even explored technology that could unlock a cell phone when held to the ear. Of the 206 bones in the human body, the six smallest are in your ears: three in the right and three in the left. Together, each three are about the size of a pencil eraser.