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The Epic Interactive Encyclopedia 1997
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eratosthenes
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1992-09-02
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9 lines
Greek geographer and mathematician, whose map
of the ancient world was the first to contain
lines of latitude and longitude, and who
calculated the Earth's circumference with an
error of about 10%. His mathematical
achievements include a method for duplicating
the cube, and for finding prime numbers
(Eratosthenes' sieve).