James R. Zimbelman is Senior Geologist Emeritus at the Center for Earth and Planetary Studies in the National Air and Space Museum at the Smithsonian Institution, where he studies planetary geology including the geologic analysis of remote sensing data of Mars, geologic mapping of Mars and Venus, the study of long lava flows on the terrestrial planets, and field studies of volcanic, aeolian and pluvial features. In 2013 he received the Ronald Greeley Award for Distinguished Service, and in 2020 the G. K. Gilbert Award, both from the Planetary Geology Division (PGD) of the Geological Society of America (GSA). He is a Fellow of GSA, has served as Secretary of the American Geophysical Union's Planetary Sciences section, an officer in PGD, and chair of the NASM Center for Earth and Planetary Studies. David A. Crown is a Senior Scientist at the Planetary Science Institute (Tucson, AZ), with professional interests in planetary geology, physical volcanology, remote sensing, and science education. His research studies focus on understanding the geologic histories of the rocky planetary bodies in the solar system and include geologic mapping investigations of the surfaces of Mars, Venus, Io, and Ceres, use of spacecraft and airborne remote sensing data for geologic analyses of planetary surface features, field investigations of volcanic deposits, and the development and application of models for geologic flows. He has published nine geologic maps of Mars to-date, eight of which examined the geology of the Hellas region. He has conducted field studies of volcanic terrains in the western continental US, Hawai'i, Mexico, and in the Central Andes of Bolivia. Peter J. Mouginis-Mark is an Emeritus Researcher at the Hawai'i Institute Geophysics and Planetology (HIGP), University of Hawaii (UH). For more than 40 years, he has studied volcanoes in the Solar System and on Earth. He has conducted field work not only in Hawai'i, but also such diverse places as the Galapagos Islands, Reunion Island, Chile, Java, Iceland, Nicaragua, and the Philippines. He has served as Geology Program Manager at NASA Headquarters, and the Director of HIGP and Associate Dean for Research, College of Engineering, both at UH. He was Principal Investigator for an international 14-year NASA study to use satellites to study active volcanoes on Earth, and has been a leader for 13 NASA week-long planetary volcanology field workshops in Hawai'i. Pete has published more than 125 peer-reviewed research papers, of which 35 have focused on Martian volcanism. Tracy K. P. Gregg is an Associate Professor in the Department of Geology at the University at Buffalo in Buffalo, NY. Her primary research interest is lava flows, and she is not particular about where they are or their composition. She has done field work on lava flows in Idaho, Peru, Iceland and Hawaii; as well as studied volcanic morphologies on Mars, the Moon, Venus, and Jupiter's moon Io. She has personally investigated lavas at the East Pacific Rise and the Galapagos Spreading Center, more than 2500 m below sea level, from the safety of the submersible Alvin. She supervised the NASA Planetary Geology and Geophysics Undergraduate Research Program (PGGURP) for 20 years, and is now helping to run its sequel (Summer Undergraduate Program in Planetary Research, or SUPPR). Tracy is a Fellow of the Geological Society of America (GSA), and was awarded the Ronald Greeley Award for Distinguished Service from the GSA Planetary Geology Division.
