This rhetorical, multi-disciplinary guide discusses the major genres of science writing including research reports, grant proposals, conference presentations, and a variety of forms of public communication. Writing in the Sciences combines a descriptive approach--helping students to recognize distinctive features of common genres in their fields--with a rhetorical focus--helping them to analyze how, why, and for whom texts are created by scientists. Multiple samples from real research cases illustrate a range of scientific disciplines and audiences for scientific research along with the corresponding differences in focus, arrangement, style, and other rhetorical dimensions. Comparisons among disciplines provide the opportunity for students to identify common conventions in science and investigate variation across fields.