- The number 4 is the only number that has the same number of letters in it.
- Opposite faces of dice always add up to 7.
- Rats and mice are ticklish, and even laugh when tickled.
- A fifteen-year-old boy invented earmuffs in 1873.
- Triscadecaphobia is the fear of the number 13.
- The life span of a house fly is between 10 to 25 days.
- There are over 97,000 km (60,000 miles) of blood vessels in the average person.
- 90% people depend on alarm clocks to wake up.
- Paper money was first used in China.
- There are over 15,000 different kinds of rice.
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