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History of large numbers — Different cultures used different traditional numeral systems for naming large numbers. The extent of large numbers used varied in each culture.One interesting point in using large numbers is the confusion on the term billion and milliard in many … Wikipedia
The Sand Reckoner — (Greek: Ψαμμίτης, Psammites ) is a work by Archimedes in which he set out to determine an upper bound for the number of grains of sand that fit into the universe. In order to do this, he had to estimate the size of the universe according to the… … Wikipedia