- Mercury is the only metal that is liquid at room temperature.
- The bullfrog is the only animal that never sleeps.
- The average American eats 263 eggs a year.
- It is not possible to tickle yourself.
- Mosquitoes prefer children to adults and blondes to brunettes.
- Paper money was first used in China.
- In 1634, Tulip bulbs were a form of currency in Holland.
- The Titanic was built in Belfast.
- The first crossword puzzle appeared in 1913.
- Apples are more effective at waking you up in the morning than coffee.
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