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.
198
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
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
In 1996, research found that having excessive body hair is linked to higher intelligence.
23
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