- The symbols used for addition (+) and subtraction (-) have been around for thousands of years but it wasn't until the 16th century that most mathematical symbols were invented. Before this time math equations were written in words, making it very time consuming..
- Petrol has no specific freezing point (it can freezes at any temperature between -82 and -115C (-180 and -240F).
- 10% of with world's food supply is consumed by insects.
- The vocabulary of the average person is between 5,000 to 6,000 words.
- Bees have 4 wings.
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