The human brain doesn't stop developing until about 25 years old.
102
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
There are about 1,400 different species of bacteria in your belly button.
10
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
199
If you are cold you are more likely to be hungry because you use energy to keep warm.
144
There's 100 trillion good bacteria living in your body.
17
Within three days of death, the enzymes that once digested your food begin to eat you.
22