If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
12
In one day, adult lungs move about 10,000 litres of air.
11
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
You see your nose at all times, your brain just chooses to ignore it.
30
Within three days of death, the enzymes that once digested your food begin to eat you.
22
There's 100 trillion good bacteria living in your body.
17
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89