It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
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Yawns are more contagious among people with closer relationships.
163
According to Harris Interactive, 70% of men and 57% of women shower daily.
75
All babies are color blind when they are born.
114
Children laugh about 400 times a day, while adults laugh on average only 15 times a day.
973
Thrity-five percent of the people who use personal ads for dating are already married.
102