Banging your head against a wall uses 150 calories an hour.
57
Perspiration is odorless; it is the bacteria on the skin that creates an odor.
39
In one day, adult lungs move about 10,000 litres of air.
11
Pain travels through your body at 350 ft. per second.
36
Your body is creating and killing 15 million red blood cells per second.
50
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
Human teeth are almost as hard as rocks!
47