The world's shortest man measures only 21.5 inches.
73
You will experience the billionth second of your life when you are 31 years old.
21
According to CNN national security correspondent David Ensore, as of 2002 bin Laden had married four women and fathered roughly 25 or 26 children.
54
Children's sense of smell is better than adults'.
860
Every human spent about half an hour as a single cell.
144
Yawns are more contagious among people with closer relationships.
163
On average, a person will spend about five years eating during his or her lifetime.
90
76% of Americans celebrate New Year's Eve in groups of less than 20.
55