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Did you know?
The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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The horizontal fraction bar was introduced by the Arabs.
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Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.