This article takes an anti-essentialist approach to the gendered construction of the science curriculum and its exclusivity. Drawing on post-structuralist theory, it examines the student subject positions that are generated within the dominant discourses and practices of curriculum science. A critical discourse analysis of student interview talk demonstrates the importance of both gender and ethnicity in the production of, or rejection of, scientist identities. While hegemonic masculinity can provide comfortable scientist identities for some males, femininity is less compatible with physical