Persian astronomer, Omar Khayyám, computed the length of the year as 365.24219858156 days which has been the most accurate calculation of old times. Khayyam also, in Treatise on Demonstrations of Problems in Algebra, produced a complete classification of cubic equations and their geometric solutions.
Abbess Hildegard of Bingen makes the first surviving reference to the use of hops in brewing. (or 1067? — Hildegard of Bingen/Rupertsberg lived 1098–1179. The reference attributed to her cannot be 1067.)