Jason Head is Assistant Professor of Biology at the University of Toronto – Mississauga and a member of the Graduate Faculty in the Department of Ecology and Evolutionary Biology at the University of Toronto. He is a broadly trained biologist and geologist whose interests focus on the evolution of herpetofaunas, especially the responses of reptiles and amphibians to climate change during the last 66.5 million years, and the evolutionary development of the skeleton in modern and fossil reptiles.