It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
A chance of a woman having twins is increased after the age of 35. About 1 in 27 women will give birth to twins after this age. After 50 the chances of having twins is 1 in 9.
51
On average, men's noses are 10% larger than women's.
12
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
Two in five people in the world marry their first love.
270
Women who are romance novel readers are reported to make love 74% more often with their partners than women who do not read romance novels.
136