It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
In one day, adult lungs move about 10,000 litres of air.
11
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
The average sperm cell swims at 8 inches per hour.
76
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
The human body contains over a billion miles of DNA.
147
An Indian man known as "Snake Manu" can put small snakes, including deadly cobras, into his mouth and pass them out through his nose.
59