One in 500 humans has one blue eye and one brown eye.
145
A hard working adult sweats up to 4 gallons per day.
39
You forget 90% of your dreams.
256
Children laugh about 400 times a day, while adults laugh on average only 15 times a day.
973
More than half the population of Kenya is under the age of 15.
71
15 percent of Americans secretly bite their toes.
57
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
In one day an average person will take about 18,000 steps.
55