By weight, Bone is five times stronger than steel.
417
Chocolate, sex, and laughter are all important for a healthy brain.
37
Your wounds heal faster if you lick them, you instinctively do this for that reason. Tears help, too.
20
The brain can stay alive for 4 to 6 minutes without oxygen. After that cells begin die.
193
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.
22
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
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
The Internal Revenue Service audits 87 percent of women who claim breast implants as tax deductions.
54