Fidgeting can burn about 350 calories a day.
201
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
There are about 1,400 different species of bacteria in your belly button.
10
It has been shown that caffeine causes headaches when stopped suddenly and can cause morning headaches that are relieved by a dose of caffeine.
101
A study in the UK states that men need at least two "guys nights out" each week to stay healthy.
5
The human brain is insensitive to pain.
76
It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
165
Only 1% of bacteria cause disease.
45