- Greek mathematician Euclid is often referred to as the 'Father of Geometry' for his revolutionary ideas and influential textbook called 'Elements' that he wrote around the year 300 BC..
- The electric toothbrush was invented in 1939.
- The $ sign was introduced in 1788.
- A piece of paper cannot be folded more than 7 times.
- Mapping is older than writing.
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