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
You're born with 300 bones, but when you get to be an adult, you only have 206!
17
When you look up at the blue sky and see white dots flying around, you’re actually seeing your own white blood cells.
30
Wearing tight pants can lead to impotence in men.
120
Each nostril of a human being register smell in a different way. Smells that are made from the right nostril are more pleasant than the left.
38
By weight, Bone is five times stronger than steel.
417
The average person has over 1,460 dreams a year!
69
It takes about 20 seconds for a red blood cell to circle the whole body.
102