Brian Skinner was born and raised in Australia, studied at the University of Adelaide in South Australia, worked in the mining industry in Tasmania, and in 1951 entered the Graduate School of Arts and Sciences, Harvard University, from which he obtained his Ph.D. in 1954. Following a period as a research scientist in the United States Geological Survey in Washington D.C., he joined the faculty at Yale in 1966, where he continues his teaching and research as the Eugene Higgins Professor of Geology and Geophysics. Brian Skinner has been president of the Geochemical Society, the Geological Society of America, and the Society of Economic Geologists, He holds an honorary Doctor of Science from Toronto University, and an honorary Doctor of Engineering from the Colorado School of Mines. Barbara Murck is a geologist and senior lecturer in environmental science at the University of Toronto Mississauga. She completed her undergraduate degree in Geological and Geophysical Sciences at Princeton University and then spent two years in the Peace Corps in West Africa, before returning to Ph.D. studies at the University of Toronto. Her subsequent teaching and research has involved an interesting combination of geology, natural hazards, environmental science, and environmental issues in the developing world, primarily in Africa and Asia. She also carries out practical research on pedagogy. She is an award-winning lecturer who has co-authored a number of books, including several with Brian Skinner.