It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
People in parts of Western China put salt in their tea instead of sugar.
16
Only 2% of the worlds population is blonde.
15
A person swallows approximately 295 times while eating dinner.
63
Intelligent men tend to be more sexually faithful.
31
A hard working adult sweats up to 4 gallons per day.
39
Yawns are more contagious among people with closer relationships.
163