In Ancient Greece, small penises were desirable, and big ones were for ‘old men and barbarians’
22
Held in farts enter your bloodstream and are bad for your body.
26
There are about 1,400 different species of bacteria in your belly button.
10
The human sigh acts as a physiological reset button.
23
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.
22
The average sperm cell swims at 8 inches per hour.
76
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
One human hair can support 3 ounces.
191