- The numerical digits we use today such as 1, 2 and 3 are based on the Hindu-Arabic numeral system developed over 1000 years ago..
- The average person laughs 10 times a day.
- Mosquitoes prefer children to adults and blondes to brunettes.
- New York's Central Park was opened in 1876.
- Swiss mathematician Leonhard Euler was probably the most influential mathematician of the 18th century, making discoveries in graph theory and introducing many modern mathematical words and notations among other things..
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