Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
One human hair can support 3 ounces.
191
The average person's skin weighs twice as much as their brain.
131
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Mushrooms are more closely related to humans than they are to plants.
47
Due to the angle at which the optic nerve enters the brain, staring at a blue surface during sex greatly increases the intensity of orgasms.
252