You can only remember 4 things at a time.
31
Yawns are more contagious among people with closer relationships.
163
Infants spend more time dreaming than adults do.
102
Intelligent men tend to be more sexually faithful.
31
Roughly a quarter of the world's people live in China.
50
Each year, around 24,000 Americans are bitten by rats!
65
Yu Youzhen, a Chinese millionaire, works as a street sweeper for the sanitation department to set an example for her children.
11