If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
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
There are about 1,400 different species of bacteria in your belly button.
10
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
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
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118