The pupil of the eye expands as much as 45 percent when a person looks at something pleasing.
130
Your stomach produces a new layer of mucus every two weeks so that it doesn't digest itself.
160
You see your nose at all times, your brain just chooses to ignore it.
30
Enamel is hardest substance in the human body.
61
The tongue is the strongest muscle in the human body.
50
Your skeleton keeps growing until you are about 35, then you start to shrink.
74
The levels of two stress hormones, cortisol and epinephrine which suppress the body's immune system, will actually drop after a dose of laughter.
112