Most of the dust underneath your bed is actually your own dead skin.
A person will create enough saliva to fill two average size swimming pools during his lifetime.
More Health Facts
Dust underneath your bed
The first known contraceptive
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
More bacteria on desk than toilet
The average office desk has 400 times more bacteria than a toilet.