Mathematics
Al-Khwarizmi and the book that named algebra
A practical handbook on inheritance and trade gave mathematics a new word, and a new way to solve for the unknown.
Writer, astronomy
Yusuf Demir
Yusuf writes about observatories and instruments, and builds paper astrolabes on weekends.
3 stories by Yusuf
Mathematics
Ibn al-Haytham put the eye in the dark room
In Cairo, a scholar asked how we see, then tested his answer with light, shutters and a darkened chamber.
Astronomy
Maragheh: an observatory with a library attached
In the thirteenth century, Nasir al-Din al-Tusi gathered astronomers, instruments and books on a hill in Azerbaijan.