The average person's skin weighs twice as much as their brain.
131
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
19
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
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
In one day, adult lungs move about 10,000 litres of air.
11
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