Professor of Geobiology
Degrees and Appointments
B.A., Colorado College, 2000; Ph.D., Harvard University, 2007; D.h.c., Colorado College. Assistant Professor, Caltech, 2009-14; Professor, 2014-; Associate Director, 2018-21.
Historical geobiology; evolution of the oxygenic photosynthesis and rise of atmospheric oxygen; origin of Archean and Proterozoic iron formation; distribution and evolution of lipid biomarker synthesis; coupled behavior of redox and acid based processes at critical transitions in Earth history.