Enamel is hardest substance in the human body.
61
In one day, adult lungs move about 10,000 litres of air.
11
One quarter of the bones in your body are in your feet!
36
People who sleep late have more mental stamina and can outperform early risers.
33
Some people have a "natural alarm clock" allowing them to wake up when they want. This is actually caused by a burst of the stress hormone adrenocorticotropin.
15
By weight, Bone is five times stronger than steel.
417
An average adult produces about half a liter of flatulent gas per day, resulting in an average of about fourteen occurrences of flatulence a day.
8
Only 1% of bacteria cause disease in humans!
2