- The ancient Greeks first grew carrots as a form of medicine and not a food.
- 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..
- A female ferret is called a jill.
- Halley's comet passes the Earth every 76 years (the next time it will return will be 2062).
- Chalk is made from tiny plankton fossils.
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