My research employs the structure, abundance, and stable isotope composition of organic molecules to solve a range of problems in Earth and Environmental Sciences. We work on everything from modern oceans, soils, plants and microbes, to 3 billion year-old rocks. Our special expertise lies in finding new ways to measure the abundance of stable isotopes in these organic molecules, and applying those measurement techniques to learn about the Earth and its inhabitants. This research is variously described as organic geochemistry, geobiology, or biogeochemistry – whatever you call it, we're firmly in the cracks between isotope geochemistry, environmental mircrobiology, global elemental cycles, and Earth history.