Earth's circumference History - Search Videos

How Eratosthenes Measured The Earth's Circumference With A Stick In 240 BCE, At An Astonishing 38,624 Kilometers

How Eratosthenes Measured The Earth's Circumference With A Stic…

Did you know a Muslim scholar calculated Earth’s circumference with stunning accuracy in the 820s—centuries before Columbus? Under Caliph Al-Ma'mun, scientists in Iraq used shadows and math to measure the planet’s size. Discover this forgotten gem from the Islamic Golden Age! 🌍✨ HistoryShorts #IslamicGoldenAge #ScienceFacts #AlMamun #AncientScience

Did you know a Muslim scholar calculated Earth’s circumference …

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This incredibly accurate science experiment was centuries ahead of its time. | Business Insider

This incredibly accurate science experiment was centuries ahead o…

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How an Ancient Greek Calculated the Earth's Circumference - GreekReporter.com

How an Ancient Greek Calculated the Earth's Circumference - Greek…

greekreporter.com

2.8K views · 20 reactions | Eratosthenes measured Earth’s circumference mathematically using two surface points to make the calculation. He noted that the Sun’s rays fell vertically at noon in Syene (now Aswān), Egypt, at the summer solstice. In Alexandria, also in Egypt, at the same date and time, sunlight fell at an angle of about 7.2° from the vertical. | Encyclopaedia Britannica | Facebook

2.8K views · 20 reactions | Eratosthenes measured Earth’s ci…

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FacebookEncyclopaedia Britannica

96K views · 2.9K reactions | 2,000 years ago, Eratosthenes measured...

96K views · 2.9K reactions | 2,000 years ago, Eratosthenes measured...

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15K views · 362 reactions | Shadows can help measure Earth’s...

15K views · 362 reactions | Shadows can help measure Earth’s...

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This measurement is more than 2,200 years old, and its accuracy i…

ABC Newsbusiness reporter Gareth Hutchens

Eratosthenes

worldhistory.org

How the ancient Greeks proved Earth was round over 2,000 years …

The IndependentLydia Spencer-Elliott

How Did Al-Biruni Accurately Measure Earth's Circumference? - …

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The Man Who Proved the Earth Is Round — 2,000 Years Ago! #facts

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Simple trick to calculate diameter of earth #trigonometry #geometry #w…

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How Did Eratosthenes Measure Earth's Circumference?

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Measuring Earth's circumference with a stick (in 245 BC)

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