It takes 17 muscles to smile, 43 to frown.
65
There are more bacteria in your mouth than there are people in the world.
60
The right lung takes in more air than the left.
30
The lense of the eye continues to grow throughout a person's life.
34
The average tastebud lives only 10 days before it dies and is replaced by a new one.
15
The average person has over 1,460 dreams a year!
69
Bearing a male child can alter a woman's brain by leaving male DNA that can persist for the rest of her life, making her less likely to suffer from Alzheimer's disease, promote tissue repair, and improve her immune system.
16