A man's beard grows fastest when he anticipates sex.
239
You mostly breathe from only one nostril at a time!
75
You have no sense of smell when you're sleeping!
72
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
Most dreams last only 5 to 20 minutes.
79
The human brain uses approximately as much energy as a 10 watt light bulb.
120
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
The average female will have 3.3 pregnancies in her life.
49