By weight, Bone is five times stronger than steel.
417
Your fingernails grow faster in summer.
744
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
Pain occurs when sounds are above 130 db.
124
In one day, adult lungs move about 10,000 litres of air.
11
A man's beard grows fastest when he anticipates sex.
239
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89