Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
If you are cold you are more likely to be hungry because you use energy to keep warm.
144
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
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
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
32
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
You see your nose at all times, your brain just chooses to ignore it.
30