I use mathematics to investigate ecological and evolutionary processes. The main focus so far has been modelling evolutionary rescue, where a declining population is “rescued” from extinction by sufficiently rapid evolution. A current interest is coalescent theory and population genetic inference, i.e., how to infer what has happened to a population using genetic data alone. One of the great things about theory is that I get to work on many interesting topics, which have included speciation, sex chromosomes, metabolic scaling theory, epistasis, and sexual selection. See the Osmond Lab for more info.