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
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
In one day, adult lungs move about 10,000 litres of air.
11
The levels of two stress hormones, cortisol and epinephrine which suppress the body's immune system, will actually drop after a dose of laughter.
112
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