Children grow faster in the springtime than any other season during the year.
108
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Women have a slightly higher average IQ than men.
164
The offspring of two sets of identical twins are legally cousins but genetically siblings.
63
40% of people who are rejected in romantic love slip into clinical depression.
72
The world's youngest parents were 8 and 9 and lived in China in 1910.
130