Who First Measured the Earth? Discover Eratosthenes' Method

Learn how Eratosthenes accurately measured the Earth's circumference in 240 B.C. using simple geometry and scientific observation.

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Eratosthenes first measured the Earth. In 240 B.C., he calculated the Earth's circumference by comparing the angles of the sun's rays at two different locations in Egypt. His method was remarkably accurate for its time, showing the power of scientific observation and mathematical calculation.

FAQs & Answers

  1. What was Eratosthenes known for? Eratosthenes is known for calculating the Earth's circumference and being one of the first to use the term 'geography'.
  2. How did Eratosthenes measure the Earth? He measured the Earth's circumference by comparing the angles of sun rays at two different locations in Egypt.
  3. What year did Eratosthenes measure the Earth? Eratosthenes measured the Earth in approximately 240 B.C.
  4. What tools did Eratosthenes use for his measurements? He used simple tools like a stick and shadows to perform geometric calculations related to the sun's rays.

Watch More

For more fascinating insights into ancient science, check out our video on the contributions of Archimedes or explore how the Greeks developed geography.

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