Enamel is hardest substance in the human body.
61
The average person's skin weighs twice as much as their brain.
131
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
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
The average sperm cell swims at 8 inches per hour.
76
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
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