If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
12
There are about 1,400 different species of bacteria in your belly button.
10
In one day, adult lungs move about 10,000 litres of air.
11
A human being loses an average of 40 to 100 strands of hair a day.
133
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
19
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
If you are cold you are more likely to be hungry because you use energy to keep warm.
144