On average, there's 100 billion neurons in the human brain.
83
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
There are about 1,400 different species of bacteria in your belly button.
10
Your skin is actually an organ.
88
Fingernails grow nearly 4 times faster than toenails.
31
Your tongue is the only muscle in your body that is attached at only one end.
173
Smoking while pregnant increases the chances of spontaneous abortions (miscarriages) stillbirths and premature labor.
77