After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55
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
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
There's 100 trillion good bacteria living in your body.
17
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
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
The human body contains over a billion miles of DNA.
147
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197