You can't tickle yourself.
29
Poor eyesight (myopia) is associated with higher IQ.
232
Enamel is hardest substance in the human body.
61
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
The human sigh acts as a physiological reset button.
23
All 13 minerals necessary for human life can be found in alcohol beverages.
282
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191