Cara M. Wall-Scheffler is Professor and Chair, Department of Biology, Seattle Pacific University. Her research interests focus around evolutionary tradeoffs throughout the human lineage with a particular interest in mobility strategies. She received the Frameshifter Award for her contributions to science and has published numerous peer-reviewed articles on the evolution of human locomotion. Helen K. Kurki is Associate Professor, Department of Anthropology, University of Victoria, British Columbia, Canada. Her research investigates the factors that underlie morphological variation in the human skeleton, with a particular focus on the pelvis. She is currently exploring the use of 3D imaging to analyze the shape of skeletal elements throughout the growth period. Benjamin M. Auerbach is Associate Professor, Department of Anthropology, and Adjunct Associate Professor, Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville. His research has focused on understanding how global human morphological variation has evolved in relation to genetic trait covariances and in correspondence with environmental factors. He currently studies primate evolution through the use of quantitative genetics and biomechanics.