It takes about 20 seconds for a red blood cell to circle the whole body.
102
Fidgeting can burn about 350 calories a day.
201
A toothbrush within 6 feet of a toilet can get airborne bacteria from flushing.
15
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
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
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
