Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
Babies' eyes do not produce tears until the baby is approximately six to eight weeks old.
58
Roughly a quarter of the world's people live in China.
50
Men laugh longer, louder, and more often than women.
61
The world's youngest parents were 8 and 9 and lived in China in 1910.
130
Senegalese women spend an average of 17.5 hours a week just collecting water.
27
The average woman uses her height in lipstick every 5 years.
146
On average women can hear better than men.
170