Responses to a survey of the environment for research in the natural sciences at predominantly undergraduate universities were received from 136 institutional representatives and more than 2,900 faculty members. There was a nearly uniform acknowledgement that time was a limiting factor for research, and that faculty had reached their limits. Faculty at undergraduate institutions have seen a reduction in their formal teaching loads over the last 40 years, as data from other studies show, but the increased emphasis on active learning and discovery-based education and increased expectations of research engagements with students are taking greater amounts of faculty time. Faculty make additional efforts to attract and retain students and spend increasing amounts of time on administrative duties without being compensated by release time from other duties. Both teaching and research require more time than they did in the past. Time is not the only factor limiting research, but it appears to be an important one. (SLD)