Abū Ḥanīfa Aḥmad ibn Dāwūd Dīnawarī was an Islamic Golden Age polymath: astronomer, agriculturist, botanist, metallurgist, geographer, mathematician, and historian. 828 – 895; died at about 67. Alive at the same time as Alfred the Great, Farabi, Ahmad ibn Hanbal, Rudaki, and Muḥammad ibn Musa al-Khwarizmi. Wiki link