It takes about 20 seconds for a red blood cell to circle the whole body.
102
Brain freeze is caused by the brain sensing the drop of temperature on your palate and increasing blood pressure in an attempt to save you from freezing.
14
On average, there's 100 billion neurons in the human brain.
83
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Smokers get ten times more wrinkles than non-smokers.
171
Chocolate, sex, and laughter are all important for a healthy brain.
37
The human brain is more active during sleep than during the day.
28