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Eratosthenes

 Related Terms

• Archimedes
• 
Aristarchus
• 
Euclid
• 
Hippocrates
• 
Ptolemy
• 
Pythagoras
• 
Thales
• 
Alexandria

 

Definition: Greek mathematician and scientist who did many incredible things. Among them was his calculation of the circumference of the Earth. He also invented a helpful method of calculating prime numbers. And he did all this without a calculator! It was the second century B.C., after all. He was also a geographer who drew a famous world map, and he was for a time the librarian at the famous Library of Alexandria.

Related Resources:
Ancient Greece
Learn more about the area as a whole.

Map Drawn by Eratosthenes

Elsewhere on the Web:
More about the Great Thinker
Read about his life and his accomplishments.

World Map According to Eratosthenes
See the map that he drew 2,000 years ago!

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