If there are 23 people in a room, there is a greater than even chance that two of them will share a birthday. The same is not true of 22 or fewer people.
The maximum number of people on a Grand Jury in the United States is 23.
There are 23 towns or cities in the United States called Moscow.
Yorick's skull was buried for 23 years before Hamlet found it in Shakespeare's play.
The expression '23 Skidoo' meaning 'scram' probably got its number from 23rd Street in New York, which contained ferries and stations for most services out of town.
According to a recent survey, 23 per cent of people store useless numbers of work contacts on their mobiles.
When a human baby is conceived, the egg and the sperm each contribute 23 chromosomes to the genetic make-up.