Banging your head against a wall uses 150 calories an hour.
57
The pupil of the eye expands as much as 45 percent when a person looks at something pleasing.
130
About 400 different kinds of microbes live on and in the human body.
-3
One out of 20 people have an extra rib.
66
The human brain uses approximately as much energy as a 10 watt light bulb.
120
There's 100 trillion good bacteria living in your body.
17
A toothbrush within 6 feet of a toilet can get airborne bacteria from flushing.
15
During menstruation, the sensitivity of a woman's middle finger is reduced.
47