## Eratosthenes of Cyrene – the First Geographer

Discover Eratosthenes of Cyrene, the ancient Greek genius who first calculated Earth’s circumference and pioneered geography.

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## Eratosthenes of Cyrene – the First Geographer

## Eratosthenes of Cyrene – the First Geographer

Discover Eratosthenes of Cyrene, the ancient Greek genius who first calculated Earth’s circumference and pioneered geography.

Eratosthenes of Cyrene (/ˌɛrətɒsˈθiːniːz/; Ancient Greek: Ἐρατοσθένης ὁ Κυρηναῖος, romanized: Eratosthénēs ho Kyrēnaîos; c. 276 BC – c. 194 BC) was a Greek mathematician, the first geographer, and astronomer. He is credited with being the first person to calculate the circumference of the Earth, which he did by applying a measuring system using stadia, a …