Yawns are more contagious among people with closer relationships.
163
Enamel is hardest substance in the human body.
61
The average sperm cell swims at 8 inches per hour.
76
Chewing gum boosts your brain power.
285
Our Right Lungs takes more air than our left lung.
194
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
One human hair can support 3 ounces.
191