There are about 1,400 different species of bacteria in your belly button.
10
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
In one day, adult lungs move about 10,000 litres of air.
11
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
12
The average person's skin weighs twice as much as their brain.
131
In 1996, research found that having excessive body hair is linked to higher intelligence.
23
