It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Eskimos don't gamble.
78
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
One in 500 humans has one blue eye and one brown eye.
145
You forget 90% of your dreams.
256
All babies are color blind when they are born.
114