By weight, Bone is five times stronger than steel.
417
The human brain is more active during sleep than during the day.
28
On average, there's 100 billion neurons in the human brain.
83
Yawns are more contagious among people with closer relationships.
163
One human hair can support 3 ounces.
191
The average person will go on a date at least 100 times before they finally marry.
33
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
If your DNA was stretched out it would reach to the moon 6,000 times.
256