I try to understand how marine organisms respond to their physical and biological environment in the ecological and evolutionary time scales. I use shelled molluscs as a model system in part because of its impressive fossil record, ubiquitous presence in the recent ecosystem and also because of its carbonate shells that can be used as a geochemical proxy. In addition to studying fossils in the field, we work on modern organisms using under-water observations, conduct laboratory experiments in aquariums, and use statistical modeling.