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Why were Cordova and Baghdad the twin cultural centers of the world during the ninth century?

What scientific developments and discoveries is Ibn Firnas credited with?

When did Ibn Firnas conduct a successful flight?

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Respuesta :

Answer:

2.Ibn Firnas is credited with making glass from stones. He had constructed his home as a sort df planetarium where one could see stars, clouds and even lightning.                                                                                                                3.875 CE

Explanation:

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