The Thomas P. O'Farrell Papers (1900-1999) are comprised of scientific reports collected by Thomas O’Farrell over the course of his career studying wildlife ecology, particularly its connection to nuclear radiation. Materials include original, reprinted, and photocopied editions of scientific reports on animal and plant life around the world, focusing primarily on the Mojave and Great Basin Deserts, Alaska, Washington, and the Pacific Ocean. Reports come from institutions including the Desert Research Institute (DRI), Oak Ridge National Laboratory (ORNL), the Environmental Protection Agency (EPA), the Energy Research and Development Administration (ERDA), and the United States Department of Energy (DOE), as well as affiliated universities.