 Challenges to assumptions about sex and gender and the role that they play in shaping both scientific research and what counts as scientific knowledge suggest that while feminist approaches start with an examination of these categories that very examination motivates fundamental rethinking of them. Just such a rethinking is taken up as an aspect of queer science studies. Queer science studies is queer both in its challenge to beliefs about what are “ordinary” or “natural” features of the world (beliefs about sex and sexuality, for example) and in its subject matter—behavior and subjects that have not traditionally been topics of science.