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About

H. G. Sizemore is a leading planetary scientist whose research bridges robotic exploration and the long-term vision for human settlement on Mars. Her work focuses on Martian surface processes, in-situ resource utilization (ISRU), and the physical properties of the regolith and ice. Sizemore made foundational contributions as a key member of the Mars Phoenix Lander team, where she led the Robotic Arm experiment (2009, 132 citations), demonstrating how to excavate, scrape, and sample icy soil—a critical proof-of-concept for future missions. She also established the size-frequency distributions of rocks on Mars’ northern plains (2008, 104 citations), using HiRISE imagery to link lander-scale measurements with orbital data, a vital reference for hazard assessment and landing site selection. More recently, Sizemore has shaped the architecture for a sustained human presence on Mars, co-authoring a highly cited study on using SpaceX’s Starship for ISRU-driven colonization (2021, 60 citations). Her work is essential reading for students and researchers interested in robotic soil mechanics, planetary surface geology, and the practical steps toward a multi-planet civilization.