When you take a step, you are using up to 200 muscles.
886
Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22
Your tongue is the only muscle in your body that is attached at only one end.
173
It takes 17 muscles to smile, 43 to frown.
65
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
Smoking while pregnant increases the chances of spontaneous abortions (miscarriages) stillbirths and premature labor.
77
Although African-Americans make up only 13% of the U.S. population, they accounted for one half of the estimated new HIV/AIDS diagnoses in 2004.
70