There are more bacteria in your mouth than there are people in the world.
60
You inhale about 700,000 of your own skin flakes each day.
29
Fingernails grow nearly 4 times faster than toenails.
31
Human hair and fingernails continue to grow after death.
7
In one day, adult lungs move about 10,000 litres of air.
11
Some people have a "natural alarm clock" allowing them to wake up when they want. This is actually caused by a burst of the stress hormone adrenocorticotropin.
15
The human sigh acts as a physiological reset button.
23
"Fish odor syndrome" is a rare genetic disorder that causes people to smell like rotten fish.
5