Martin Carrier, born in 1955, teaches philosophy of science at Bielefeld University. His research is directed at methodological characteristics of science in the context of practice, that is, research targeted at economically or politically relevant fields.Rebecca Mertens (PhD), born in 1984, is a postdoctoral researcher in the history and philosophy of science at Bielefeld University. She works on the role of analogies, models and forms of comparison in the history of molecular genetics and is a member of the collaborative research program »Practices of Comparison: Ordering and Changing the World«.Carsten Reinhardt, born in 1966, has been Professor of Historical Science Studies at Bielefeld University since 2007. His research areas are history of chemistry, industrial research, scientific instruments and expert knowledge.