This article discusses the viability of a feminist constructivist approach of knowledge through the careful reading of the work of the feminist scholar and historian of science and technology, Donna Haraway. Haraway proposes an interpretation of objectivity in terms of "situated knowledges. " Both the subject and the object of knowledge are endowed with the status of material-semiotic actors. By blurring the epistemological boundary between subject and object, Haraway's narratives about scientific discourse become populated with hybrid subjects/objects. The author argues (...) that the ethics of these hybrid subjects consists of an uneasy mixture of a Nietzschean and a socialist-Christian ethic. The article concludes by setting out why Haraway's project constitutes an inter esting effort tofuse postmodern insights and feminist commitments. (shrink)