You can't tickle yourself.
29
Human hair and fingernails continue to grow after death.
7
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82