- The first credit card was a Diner's Club card issued in 1950.
- It's possible to lead a cow up stairs but not down.
- The Basenji is a dog that yodels instead of barking.
- Artificial Christmas trees have outsold real ones every year since 1991.
- Mathematical developments increased rapidly around the time of the Italian Renaissance in the 16th century and continued through the scientific revolution of the 17th and 18th centuries, becoming increasingly abstract in the 19th and 20th centuries.
- Cats spend 66% of their life asleep.
- The US produces 19% of the world's trash.
- Humans shed and regrow outer skin cells every 27 days (almost 1,000 new skins in a lifetime).
- Everyday is a holiday somewhere in the world.
- The smallest ten prime numbers are: 2, 3, 5, 7, 11, 13, 17, 19, 23 and 29.
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