Dan Ksepka is a vertebrate paleontologist and evolutionary biologist at North Carolina State University.  He received a BS in Geological Sciences from Rutgers University and a PhD in Earth and Environmental Sciences from Columbia University through the American Museum of Natural History joint fellowship program.  His current research focuses on exploring patterns of congruence and disparity between fossil ages and molecular divergence dates.  Dan is also interested in major evolutionary transitions in birds, especially the evolution of wing-propelled diving in penguins.  He enjoys sharing science with all types of audiences and blogs at March of the Fossil Penguins (fossilpenguins.wordpress.com)