- Twins have a very high occurrence of left-handedness.
- In Japan, letting a sumo wrestler make your baby cry is considered good luck.
- Rats and mice are ticklish, and even laugh when tickled.
- The ancient Greeks first grew carrots as a form of medicine and not a food.
- Not a single number has the letter "b" in it until you reach a billion.
- Mapping is older than writing.
- Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
- Your liver has over 500 functions.
- The first metered taxi was introduced in 1907.
- A ten-gallon hat holds less than a gallon of liquid.
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