In Ancient Greece, small penises were desirable, and big ones were for ‘old men and barbarians’
22
Your body is creating and killing about 2.4 million red blood cells per second.
17
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
One human hair can support 3 ounces.
191
Your heart will pump about 212 million liters in its lifetime.
26
The average person's skin weighs twice as much as their brain.
131
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17