Fingernails grow nearly 4 times faster than toenails.
31
In one day, adult lungs move about 10,000 litres of air.
11
By weight, Bone is five times stronger than steel.
417
Your thumb is about the same size as your nose.
124
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
About 400 different kinds of microbes live on and in the human body.
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There's a new vaccine for alcoholism that gives drinkers an immediate and harsh hangover, even if they drink a small amount of booze.
14
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18