Mendel and his peas. Goodall and her chimpanzees. Bentley and his snowflakes. Pasteur and his sheep. Not only do these stories intrigue students, but they also demonstrate the trials and tribulations associated with scientific inquiry. Using scientists' biographies piques student interest while providing an added dimension to their understanding of scientific inquiry and the nature of science. In the unit presented here, students learn about important skills used in scientific undertakings while developing positive dispositions necessary for employing them. Moreover, by reading about scientists' struggles and challenges and the impact of their scientific discoveries, students develop an awareness of science as a human endeavor that takes place in a historical and cultural context. (Contains 6 figures and 55 resources.)