- Italian mathematician Leonardo of Pisa (better known as Fibonacci) lived between the years 1170 and 1250 and is best known today for Fibonacci numbers, the number sequence named after him. Fibonacci introduced the number sequence to Western Europe in his book 'Liber Abaci' after they had been described earlier by Indian mathematicians..
- The average bed contains over 6 billion dust mites.
- The first crossword puzzle appeared in 1913.
- Emus can't walk backwards.
- More people are allergic to cows milk than any other food.
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