Is it better to fight a fever or let it run its course? Why do pregnant women get morning sickness? In this course, we will look at modern humans and their health from the perspective of evolutionary biology. Students will be introduced to the basics of evolution by natural selection and will learn to interpret morphological, biochemical and behavioral aspects of humans and their pathogens in this context (such as how and why the level of virulence of a disease changes when human habits change). Readings will include Why We Get Sick, Evolving Health, and numerous papers from the primary literature. 3 hrs. sem./disc.