All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
21
Held in farts enter your bloodstream and are bad for your body.
26
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
The human sigh acts as a physiological reset button.
23
Your thumb is about the same size as your nose.
124
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
31
In Ancient Greece, small penises were desirable, and big ones were for ‘old men and barbarians’
22