In spite of many many verses in Quran that prove Earth is flat some Muslims claim that Islam was the first one that announced Earth is spherical. That claim is false and here is the proof:
Theory of spherical earth started with Pythagoras , Plato and Aristotle, About 2200 years ago “Eratosthenes of Cyrene” (Greek: Ἐρατοσθένης) was a Greek mathematician, geographer, poet, astronomer, and music theorist.He was the first person who proved that the Earth is a sphere shape.
Plato (427–347 BC) travelled to southern Italy to study Pythagorean mathematics. When he returned to Athens and established his school, Plato also taught his students that Earth was a sphere.
“Eratosthenes of Cyrene ” was the first person to use the word “geography” in Greek and he invented the discipline of geography as we understand it. He invented a system of latitude and longitude.He was the first person to calculate the circumference of the earth by using a measuring system using stades, or the length of stadiums during that time period (with remarkable accuracy). He was the first to calculate the tilt of the Earth’s axis (also with remarkable accuracy). He may also have accurately calculated the distance from the earth to the sun and invented the leap day(something that Muhammad had nu clue about it!!!) He also created the first map of the world incorporating parallels and meridians within his cartographic depictions based on the available geographical knowledge of the era. In addition, Eratosthenes was the founder of scientific chronology; he endeavoured to fix the dates of the chief literary and political events from the conquest of Troy.According to an entry in the Suda (a 10th-century reference), his contemporaries nicknamed him beta, from the second letter of the Greek alphabet, because he supposedly proved himself to be the second best in the world in almost every field,something that Muhammad never achieved!!I for Muhammad it was easier to chase women,behead people, build up wealth ,and steal discoveries from other scientists!!!!
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xx[ David Johnson and Thomas Mowry, Mathematics: A Practical Odyssey, Cengage Learning, 2011, p. 7 ]
xx[Dicks, D.R. (1970). Early Greek Astronomy to Aristotle. Ithaca, N.Y.: Cornell University Press. p. 68. ISBN 978-0-8014-0561-7. ]
xx[Dicks, D.R. (1970). Early Greek Astronomy to Aristotle. Ithaca, N.Y.: Cornell University Press. pp. 72–198. ISBN 978-0-8014-0561-7. ]
xx[Continuation into Roman and medieval thought: Reinhard Krüger: "Materialien und Dokumente zur mittelalterlichen Erdkugeltheorie von der Spätantike bis zur Kolumbusfahrt (1492)” ]