It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Children grow faster in the springtime than any other season during the year.
108
Women have a slightly higher average IQ than men.
164
Women who read romance novels have sex twice as often as those who don't.
101
People in parts of Western China put salt in their tea instead of sugar.
16
Males sweat 40% more than females.
104