By weight, Bone is five times stronger than steel.
417
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
Gorillas can catch human colds and other illnesses.
205
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
On average, there's 100 billion neurons in the human brain.
83
The average person's skin weighs twice as much as their brain.
131