It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69
Touching a teddy bear can make people feel less lonely.
36
Over 50% of lottery players go back to work after winning the jackpot.
71
Men are more attracted to women whose bone structure is similar to their own mothers. It's called "sexual imprinting".
18
95% of people feel uncomfortable when the TV volume is an odd number.
392