If you hold farts in during the day, they'll just come out when you sleep.
16
Within three days of death, the enzymes that once digested your food begin to eat you.
22
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
Held in farts enter your bloodstream and are bad for your body.
26
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
The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
There are about 1,400 different species of bacteria in your belly button.
10