It takes 17 muscles to smile, 43 to frown.
65
It is almost impossible to sneeze with your eyes open. It is a defense mechanism that has evolved to protect our eyes from bacteria and debris.
164
You're born with 300 bones, but when you get to be an adult, you only have 206!
17
10 seconds is the amount of time until unconsciousness after the loss of blood supply to the brain.
108
The human sigh acts as a physiological reset button.
23
Wearing tight pants can lead to impotence in men.
120
Fingernails grow nearly 4 times faster than toenails!
30
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13