Born on 1160 Died on 1233
Abu al-Hassan Ali ibn Muhammad ibn Muhammad was an Arab or Kurdish historian and biographer who wrote in Arabic and he was from the Ibn Athir family. According to the 1911 Edition of Encyclopædia Britannica, he was born in Jazirat Ibn Umar, Great Seljuq Empire.
'Ali ibn 'Isa was a notable oculist (kahhal) of Baghdad whose life falls in the first half of the 11th century. His main work is Tadkirat Al-kahhalin (Manual for Oculists or Note-book of the Oculists). It is the classical handbook of Muslim ophthalmology, translated once into Hebrew and twice into L...
He was an Astronomer. Together with khalid Ben Abdulmelik in 827, he measured the Earth's circumference, getting a result of 40,248 km (or, according to other sources, 41,436 km).
Born on 998 Died on 1061
An Egyptian physician, astrologer and astronomer, born in Jiza (ca. 998-ca. 1061). He was a commentator on Greek medicine, and in particular on Galen and Hippocrates. He is also known for his observation of the Supernova that appeared in the sky in 1006, which he mentioned in his commentary on Ptole...