Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
The average person's skin weighs twice as much as their brain.
131
The average person will go on a date at least 100 times before they finally marry.
33
Your fingernails grow faster in summer.
744
Yawns are more contagious among people with closer relationships.
163
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130