Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
There are about 1,400 different species of bacteria in your belly button.
10
The brain receives 20% of the body’s oxygen and 25% of total body glucose utilization, despite it accounting for only 2% of a person’s weight (about 1.4 kilograms).
8
One human hair can support 3 ounces.
191
If your DNA was stretched out it would reach to the moon 6,000 times.
256
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
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