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About

K. L. Siebach is a planetary geologist whose research focuses on the sedimentology and geochemistry of Mars, with a particular emphasis on understanding past aqueous environments and habitability. A key contributor to NASA’s Mars Science Laboratory (Curiosity rover) mission, Siebach has been instrumental in interpreting the rock record of Gale Crater. Her major contributions include developing methods to quantify grain size and sedimentary structures from rover images, which has revealed ancient fluvial and lacustrine environments. Among her most cited works is the 2009 paper on the Mars Phoenix Lander Robotic Arm experiment (132 citations), which detailed the excavation and sampling of icy soil in the Martian arctic—a foundational study for understanding near-surface water ice. Siebach’s work has been pivotal in demonstrating that Mars once had sustained, habitable conditions. Her research, cited over 2,000 times, has shaped current understanding of Martian sedimentary processes and continues to inform the search for biosignatures. She is also recognized for her leadership in rover operations and science planning, making her a prominent voice in the next generation of Mars exploration.