Patrick Hesp (Ph.D; DSc) is the Strategic Professor of Coastal Studies, College of Science and Engineering at Flinders University, Australia. He has held academic positions in NSW, Western Australia, Singapore, USA, and NZ, non-academic positions in the WA State Dept. of Agriculture, Geomarine P/L, and the Rottnest Island Authority, held visiting professorships and fellowships in South Africa, Namibia, Israel, Holland, China, Brazil, Italy, Malaysia, Thailand, and France, and has worked on beaches and coastal and desert dunes all over the world. He is an expert on coastal dune geomorphology, and has published over 290 articles in his career to date. Nicholas Lancaster is Emeritus Research Professor at the Desert Research Institute, Nevada, USA. His decades of research on sand dunes has taken him to deserts in Africa (Namib, Kalahari, northern and western Sahara), Arabia, Antarctica, and the western United States (Mojave and Sonoran Deserts). His work has resulted in more than 150 scientific papers and several books and has been recognized by awards from the Geological Society of America, the Association of America Geographers, the International Society for Aeolian Research, the International Quaternary Association, and the Nevada System of Higher Education.