- In zero gravity, a candle's flame may appear circular and blue.
- The game of Tug-of-war was an Olympic sport from 1900-1920.
- It's possible to lead a cow up stairs but not down.
- Lion's can't roar until the age of 2.
- The safest car color is white.
- Cows can walk up stairs but not down them.
- It takes an interaction of 72 muscles to produce human speech.
- In Venus, it snows metal.
- Mercury is the only metal that is liquid at room temperature.
- Its physically impossible for pigs to look up at the sky.
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