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Eratho [ Kids/Teens ] - Brief information on Eratosthenes, including when and where he was born, as well as later historians that followed up on his work of the stars.
Eratosthenes of Cyrene [ Teens/Mature Teens ] - Biography of the mathematician, geographer and astronomer born 276 BC in Cyrene, North Africa (now Shahhat, Libya). From The MacTutor History of Mathematics archive.
The Eratosthenes Project [ Teens/Mature Teens ] - Gives information about the techniques and computations used by this ancient mathematician to find the circumference of the earth. Includes sample sketch and reconstructed map of the world.
Wikipedia - Eratosthenes [ Teens/Mature Teens ] - Brief article covers his life and work. Includes links for further reading.
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