- 8% of people have an extra rib.
- 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..
- The $ sign was introduced in 1788.
- The oldest word in the English language is 'town'.
- The water in the Dead Sea is so salty that its easier to float than sink.
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