A Greek mathematician named Eratosthenes calculated an accurate measurementofthe Earth’s circumference, that being 250,000 stades orclose to Earth’s actualcircumference of40,120 km,¹ in Hellenistic Alexandria, Egyptcirca 240 B.C.E. To do this, Eratosthenes’utilized the distance between Alexandria and Syeneandgnomon measurements taken in Syeneand Alexandria at noon on the summersolstice.
Classics; Ancient Science Fair; Earth's Circumference; Eratosthenes; Earth
Ancient History, Greek and Roman through Late Antiquity | Classics | History of Science, Technology, and Medicine
Colleges & Schools
Staver , K. (2020). A Philological Examination of Eratosthenes’ Calculation of Earth’s Circumference. Dayton, Ohio.