Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
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
Poor eyesight (myopia) is associated with higher IQ.
232
In one day, adult lungs move about 10,000 litres of air.
11
Wearing tight pants can lead to impotence in men.
120
Although men ARE more likely to suffer heart attacks, women are more likely to die within a year from having a heart attack.
50
The tongue is the strongest muscle in the human body.
50
There is a disease called ichthyosis that turns the skin scaly like a fish.
90