The aim of this paper is to analyze the construction of identity of science in a Brazilian magazine that covers science. We take identity as a discursive construction and use theories of Discourse Analysis and polyphony of Bakhtin to unfold which discursive voices are present in the magazine’s discourse. Our analysis is divided in three stages: 1) localization of speakers and enunciators, 2) description of ideological formations that originate these enunciation positions, 3) investigation of voices that compose the magazine’s discourse. Results show identities of science in the magazine built by the confluence of modern and postmodern discoursive voices. Effects of polyphony are only applied to scientific community, giving space to scientific debates. Voices of ordinary people are used to support scientific discoveries. Key words: Identity of science, polyphony, discourse analysis, discursive voices, science, media, journalism.