All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
21
The tongue is the strongest muscle in the human body.
50
Men have larger hearts; women's hearts beat faster.
77
If your DNA was stretched out it would reach to the moon 6,000 times.
256
Women buy four out of every 10 condoms sold.
71
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
In Japan, condoms are commonly sold 'door to door'!
54
You have no sense of smell when you're sleeping!
72