We use numerical models to study the interactions between life and environment on Earth and habitable exoplanets to inform life detection missions. Our research has three major themes:

Earth System Evolution

How have biology, ocean-atmosphere chemistry, the solid Earth, and climate co-evolved throughout our planet's history?

Planetary Habitability

How do stellar, orbital, planetary properties influence long-term habitability? 

Exoplanet Biosignatures

How can we recognize the fingerprints of life in observations of exoplanet atmospheres with current and upcoming telescopes?