Khawaja Muammad ibn Muammad ibn asan s (born 18 February 1201 in s, Khorasan - died on 26 June 1274 in al-Kaimiyyah district of metropolitan Baghdad), better known as Nar al-Dn al-s, was a Persian polymath and prolific writer: an astronomer, biologist, chemist, mathematician, philosopher, physician, physicist, scientist, theologian and Marja Taqleed. Read more