I am a geochemist who is interested in understanding (1) the origin and evolution of continents, (2) the chemical and physical differentiation of the Earth and other rocky planets, and 3) the chemical exchanges between the Earth’s interior and the ocean-atmosphere system. I take an interdisciplinary approach to investigating these themes by attempting to bring together geochemistry, geophysics, and geodynamics. I place equal emphasis on data, observation, and theory.