It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
The “cheerleader effect”, the theory that girls look more attractive in groups, is scientifically proven.
8
Only about 2% of the world population has green eyes.
36
On average, men's noses are 10% larger than women's.
12
People are more likely to tilt their heads to the right when kissing instead of the left (65 percent of people go to the right!)
278
Two in five people in the world marry their first love.
270