Your thumb is about the same size as your nose.
124
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
Those who get out of bed by 7am are more likely to be thinner and happier.
20
When you take a step, you are using up to 200 muscles.
886
At age 70, more than 70 percent of men are still potent!
29
The human brain doesn't stop developing until about 25 years old.
102
"Fish odor syndrome" is a rare genetic disorder that causes people to smell like rotten fish.
5
Within three days of death, the enzymes that once digested your food begin to eat you.
22