You mostly breathe from only one nostril at a time!
75
It takes about 20 seconds for a red blood cell to circle the whole body.
102
Your wounds heal faster if you lick them, you instinctively do this for that reason. Tears help, too.
20
Putting sugar on a wound or cut will greatly reduce pain and speed up the healing process.
25
A person will burn 7 percent more calories if they walk on hard dirt compared to pavement.
45
Banging your head against a wall uses 150 calories an hour.
57
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