Navel

We’re pretty sure you have one of these—but have you ever stopped to think about it? The navel, belly button, or umbilicus is a small depression in the abdominal wall, and it’s caused by, well, being born! But did you know that the navel is essentially a scar that all human beings have in common?

There are navels of all shapes and sizes, and the most distinctive are the ones that pop out. These are relatively rare and can be found in about 10% of the world’s population. In Hindu mythology, the navel is considered one of the symbols of rebirth and presented as evidence for reincarnation.