Your thumb is about the same size as your nose.
124
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
Held in farts enter your bloodstream and are bad for your body.
26
In one day, adult lungs move about 10,000 litres of air.
11
The human sigh acts as a physiological reset button.
23
If you hold farts in during the day, they'll just come out when you sleep.
16
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
The average sperm cell swims at 8 inches per hour.
76