For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
The average person's skin weighs twice as much as their brain.
131
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
We share 70% of our DNA with a slug.
218
If your DNA was stretched out it would reach to the moon 6,000 times.
256
The human brain is more active during sleep than during the day.
28
Every human spent about half an hour as a single cell.
144