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What’s the equator? Geography and the Earth

By |2018-04-12T08:53:24+00:00August 20th, 2017|Physics|

This globe shows the equator running around the widest part of the Earth. The equator is an imaginary line running around the widest part of the Earth, halfway between the North Pole and the South Pole. So if you are north of the Equator, you're in the Northern Hemisphere. And if you're south of [...]

Islamic geographers – Medieval Islam

By |2018-04-18T09:54:08+00:00July 25th, 2017|History, Islam, Science|

al-Idrisi's map of the world (1100s AD) Many people in the Islamic Empire were rich enough to send their sons to college, and so the big university at Alexandria in Egypt stayed open, though it moved to the new town of Cairo. A new university also opened up in Baghdad, near ancient Babylon (modern Iraq), and there were smaller universities in Tunis (in Tunisia [...]