Dr. Sonja Brentjes holds numerous degrees, including a Dr. rer. nat. in history of mathematics in 1976 from the Karl-Sudhoff-Institute, Karl-Marx-University, Leipzig and a Diploma in Near Eastern Studies/Arabic language from the Luther-University in Halle. An expert on Islamic mathematics and science, she is on the faculty of the Institute for the Study of Muslim Civilizations, Aga Khan University International in London. From January to May of 2005 she was on leave as a senior research fellow at the Dibner Institute for the History of Science and Technology, at MIT in Cambridge, Massachusetts. Two of her recent publications are "Between doubts and certainties: on the place of history science in Islamic societies within the field of history of science," and "On the relation between al-Nayrizi's Arabic commentary on the Elements and the Latin version of a commentary ascribed to Anaritius."