If you unfolded your brain, it would cover an ironing board.
42
There is a disease called ichthyosis that turns the skin scaly like a fish.
90
Each nostril of a human being register smell in a different way. Smells that are made from the right nostril are more pleasant than the left.
38
The average human body contains enough iron to make a small nail.
50
There are more bacteria in your mouth than there are people in the world.
60
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
22
Smokers get ten times more wrinkles than non-smokers.
171