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
Your tongue is the only muscle in your body that is attached at only one end.
173
The lense of the eye continues to grow throughout a person's life.
34
In Nepal, cow dung is used for medicinal purposes.
19
According to one report, it would take 800 marijuana joints to kill a person - but the cause of death would be carbon monoxide poisoning.
176
According to a 1950s survey, 75% of men ejaculate within two minutes of penetration.
109
Brain freeze is caused by the brain sensing the drop of temperature on your palate and increasing blood pressure in an attempt to save you from freezing.
14