The average human body contains enough iron to make a small nail.
50
If you are cold you are more likely to be hungry because you use energy to keep warm.
143
You mostly breathe from only one nostril at a time!
75
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
Pain travels through your body at 350 ft. per second.
36
Pain travels through the body at 350 feet per second!
23