A person will burn 7 percent more calories if they walk on hard dirt compared to pavement.
45
The lifespan of a tastebud is ten days.
130
About half of all Americans are on a diet on any given day.
29
Perspiration is odorless; it is the bacteria on the skin that creates an odor.
39
The average sperm cell swims at 8 inches per hour.
4
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
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
44