47% of people have a nightmare at least once a month.
186
One in 500 humans has one blue eye and one brown eye.
145
Karl Pillemer, a professor, performed a study on thousands of elderly people and what advice they had about life. On happiness, there was a consensus: “the elders viewed happiness as a choice, not the result of how life treats you.”
13
The Japanese, on average, are the shortest people.
320
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11