A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
You can't tickle yourself.
29
Enamel is hardest substance in the human body.
61
Poor eyesight (myopia) is associated with higher IQ.
232
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Only humans shed emotional tears.
331
The human brain has the capacity to store everything that you experience.
4k
A man's beard grows fastest when he anticipates sex.
239