Eratosthenes of Cyrene was a Greek polymath. He was a mathematician, a geographer, a poet, a music theorist, and an astronomer. Not only did he calculated the circumference of Earth, but he also calculated the tilt of Earth’s axis relative to the plane of its equator. It is believed that Eratosthenes produced the first map of the world that included meridian lines and parallel lines. These were similar to our modern lines of latitude and longitude. He marked the equator and its size, considered the size of the polar zones and how far these zones were from the tropics.
#GreekMathematician #geographer #poet #astronomer #earth #circumferenceofearth #earthcircumference #eratosthenes
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