Elisabeth Parfitt was previously a lecturer in Physical Volcanology at the University of Leeds and an Honorary Research Fellow at Lancaster University in the UK. She also spent time in the USA as a Research Scientist at Brown University and at the State University of New York at Buffalo. She currently works as an Archivist in North Wales. Lionel Wilson is Emeritus Professor of Earth and Planetary Sciences at Lancaster University, UK. He is also a Visiting Professor at the University of Hawai‘i and Brown University in the USA. Laura Kerber is a Research Scientist at NASA’s Jet Propulsion Laboratory and a Visiting Associate in Planetary Sciences at the California Institute of Technology.