Henry Frankel was awarded a PhD from Ohio State University in 1974 and then took a position at the University of Missouri, Kansas City where he became Professor of Philosophy and Chair of the Philosophy Department (1999 2004). His interest in the continental drift controversy and the plate tectonics revolution began while teaching a course on conceptual issues in science during the late 1970s. The controversy provided him with an example of a recent and major scientific revolution to test philosophical accounts of scientific growth and change. Over the next thirty years and with the support of the United States National Science Foundation, the National Endowment for the Humanities, the American Philosophical Society and his home institution, Professor Frankel's research went on to yield new and fascinating insights into the evolution of the most important theory in the Earth sciences.