The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
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.
21
In one day, adult lungs move about 10,000 litres of air.
11
Your thumb is about the same size as your nose.
124
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
If you hold farts in during the day, they'll just come out when you sleep.
16
There are about 1,400 different species of bacteria in your belly button.
10