Professor, School of Earth and Space Exploration, Arizona State University

Professor of Hydrology and Atmospheric Sciences, University of Arizona

(1) Carleton University, Canada; and (2) Tomsk State Univeristy, Russia

University of Calgary

Professor of Planetary Geology, University of Notre Dame

Southwest Research Institute

Instituto de Geociencias, CSIC-UCM

US Geological Survey

Professor of Geology, The University of Queensland

Associate Professor