Fingernails grow nearly 4 times faster than toenails.
31
The human brain doesn't stop developing until about 25 years old.
102
Every time you lick a stamp, you're consuming 1/10 of a calorie!
47
Your stomach produces a new layer of mucus every two weeks so that it doesn't digest itself.
160
The right lung takes in more air than the left.
30
In one day, adult lungs move about 10,000 litres of air.
11
25% of your bones are located in your feet.
12
In Japan, condoms are commonly sold 'door to door'!
54