I am an archaeological scientist with broad interests in the applications of chemistry and quantitative methods in archaeology. By using isotope analysis of bones and teeth, I examine diet, migration, and exposure to lead pollution in past populations around the world. I have also worked extensively on bone diagenesis, the microscopic and chemical changes to buried bone. I apply Bayesian statistical analysis of dating information to answer questions about chronologies in eras from the Lower Palaeolithic to the Seventeenth Century. I also apply mathematical and statistical models to interpret isotope analyses and to evaluate palaeodemographic information. A key aspect of all my work is to integrate the science with the archaeological context and questions.