Born on 11th July, 1956, in Moers. Degree in physics Free Univ. Berlin (1983), doctorate in mathematics Berlin Technical Univ. (1987), collaborator/co-editor of the Collected Papers of Albert Einstein (1986-1992), Assistant Professor (1989) and Associate Professor Boston Univ. (1993), Simon Silverman Visiting Professor of History of Science at Tel Aviv Univ. (1993), Visiting Professor of Philosophy ETH Zurich (1993-1994), Adjunct Professor Boston Univ. (since 1994), Director and Scientific Member at the Max Planck Institute for the History of Science (since 1994), "Honorarprofessor" (part-time prof.) Humboldt-Univ. of Berlin (since 1996). Member of the German National Academy of Sciences Leopoldina since 2005, honorary professor for the history of science at the Free University of Berlin since 2006.