Don Brinkman is director of Research at the Royal Tyrrell Museum of Palaeontology. He undertakes research on the taxonomy, biostratigraphy, and distributions of Mesozoic turtles. Turtles are a focus of his research because they offer unique insights into the patterns of distribution of Mesozoic vertebrates in general and the degree to which faunal interchange between separate areas were possible. He ... Read moream particularly interested in using information from turtles to elucidate questions of interchange between Asia and North America and latitudinal zonation of North America during the Cretaceous. Jim Gardner is the Curator of Palaeoherpetology at the Royal Tyrrell Museum of Palaeontology in Drumheller, Canada. His research program focuses on the evolutionary history of Mesozoic and Cenozoic lissamphibians, especially those from the North American Western Interior. Jim maintains a sideline interest in turtles, thanks to his MSc study of soft-shelled turtles from the Late Cretaceous of Alberta. Pat Holroyd is Museum Scientist in the Museum of Paleontology, Berkeley, California. She undertakes research on mammals and reptiles (principally turtles) from the Late Cretaceous and early Paleogene (approximately 70-30 million years ago). For the past ten years, she has maintained an active field program in the Greater Green River Basin of southwestern Wyoming, where the rocks preserve fossil mammals and reptiles from approximately 53 to 50 million years in age. Her research program is centered around understanding the pattern and process of change in the continental biota during warm intervals in the past. This could help us evaluate how long-term climate change may alter the Earth's biota in the future. Show Less