Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
When you get goosebumps and your hair stands, the hair helps to trap air, making you feel warmer by keeping in your body heat.
46
If you hold farts in during the day, they'll just come out when you sleep.
16
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
The human sigh acts as a physiological reset button.
23
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
A human being loses an average of 40 to 100 strands of hair a day.
133