It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
40% of people who are rejected in romantic love slip into clinical depression.
72
One million Americans, about 3,000 each day, take up smoking each year. Most of them are children.
-86
Females learn to talk earlier, use sentences earlier, and learn to read more quickly than males.
119
Americans will spend more on cat food this year than baby food.
32
Awarding people money for doing well in IQ tests causes them to score better, $10 increased people's score by an average of more than 20 IQ points. IQ tests don’t just measure intelligence - they also measure effort.
9
Every workday, 6.7 million people commute to Manhattan!
26
Malaysians protect their babies from disease by bathing them in beer.
-15