I am considered a leading expert on the behavior of volatiles in the Earth's interior. My work on water in early Earth magmas is providing new insights into the thermal evolution of the Earth. Likewise, my recent research on noble gas solubility in the mantle is challenging the existing models of mantle structure and evolution. My research focuses on the chemical evolution of the Earth, moons and planets. I use a combination of high-pressure, high-temperature experiments to understand the chemical behavior of geomaterials at depth, and use this information to interpret the geochemical rock record.