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13/12/1048 The man who measured Earth dies


Watch BBc documentary on muslim scientist Abū Rayḥān al-Bīrūnī Who find Actual size of Earth


Abu Rayhan Biruni ( Al Biruni ) the Great Persian Scientist

Islamic scholar Al-Biruni died, although the date of his death is also reported on 9 December. He is best known for his estimate of Earth radius (6 339.6 km, only 17.15 km less than the modern value). He contributed too many other sciences: mathematics, physics, astronomy, geography, history, and linguistics.
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