How Aryabhata got the earth's circumference right | Mint
This measurement is more than 2,200 years old, and its accuracy is remarkable - ABC News
How Ancient Scientists Calculated The Circumference Of The Earth - Ancient Pages
2,000 Years ago, This Greek Mathematician Proved The Earth Is Round Using A stick And His Brain – PTAMA.NET
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How Eratosthenes Calculated the Earth's Circumference
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Eratosthenes | Biography, Discoveries, Sieve, & Facts | Britannica
Ελληνική Ιστορία και Προϊστορία - Greek History and Prehistory - ERATOSTHENES OF CYRENE : THE GREEK SCIENTIST WHICH CALCULATE THE CIRCUMFERENCE OF EARTH Eratosthenes of Cyrene (c. 276 BC– c. 195/194 BC)
Eratosthenes: The Measurement of the Earth's Circumference
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Measure Earth's Circumference with a Shadow - Scientific American
This Month in Physics History
The Cultural Tutor on Twitter: "Ancient people knew the earth was round. And about 2,240 years ago a man called Eratosthenes calculated its circumference within 1% of the correct figure... with a
