Benedikt HallgrimssonBenedikt Hallgrimsson, Professor in the Department of Cell Biology and Anatomy at the University of Calgary, is coeditor of Variation: A Central Concept in Biology and of Advanced Imaging in Biology and Medicine: Technology, SoftwareEnvironments, Applications. Brian K. Hall is University Research Professor Emeritus at Dalhousie University. His latest book is Evolution: Principles and Processes. Read More Read Less