DARREN H. TANKE is a Technician Dinosaur Research Program at the Royal Tyrrell Museum of Palaeontology in Alberta.
KENNETH CARPENTER is author of Eggs, Nests, and Baby Dinosaurs (Indiana University Press) and has edited Dinosaur Systematics: Approaches and Perspectives (With Philip J. Currie) and The Armored Dinosaurs (forthcoming from Indiana University Press).