- Petrol has no specific freezing point (it can freezes at any temperature between -82 and -115C (-180 and -240F).
- The equals sign (=) was invented in 1557 by a Welsh mathematician named Robert Recorde..
- Half of all crimes are committed by people under the age of 18.
- Giant tortoises can live in captivity longer than any other animal.
- You can't trademark surnames.
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