T. Scott Bryan received a BS in geology at San Diego State University (1972) and a MS in geology at the University of Montana (1974). He worked for the National Park Service as a mining geologist in Death Valley National Monument and also held positions with Glacier National Park, Glen Canyon National Recreation Area, Los Angeles Field Office, and Yellowstone National Park. He is the author of The Geysers of Yellowstone and The Explorer�s Guide to Death Valley National Park, both published by the University Press of Colorado, and Geysers: What They Are and How They Work, published by Mountain Press Publishing Company.