My research straddles the boundary of biology and geology. I am interested in the evolution of life and earth through time and how we can use that information to look for life beyond earth. My research on the interaction between life and modern settings focuses on microorganisms that consume atmospheric gases and how these microorganisms alter the environment around them. My research on the interactions between past environments and life seeks to understand the forces behind broad scale changes in earth’s geochemistry and the diversity of life. I am currently an Associate Research Scientist at the Planetary Science Institute and a Senior Research Associate at the University of Arizona.