“…High-performance computing has become increasingly accessible to paleobiologists and provides the facility to rapidly solve the complex chain of equations that describe the mechanics and energetics of three-dimensional (3D) motion in jointed musculoskeletal systems. Computational methods are now standard for calculating the mass and inertial properties of organisms (Henderson, 1999;Henderson and Snively, 2004;Hutchinson et al, 2007;Bates et al, 2009aBates et al, , 2009b and for reconstructing the mechanical behavior (e.g., Rayfield, 2004Rayfield, , 2005Richmond et al, 2005), range of motion and functional repertoire (e.g., Stevens and Parrish, 1999), and likely kinematics and energetic performance of biological structures (e.g., Sellers et al, , 2005Nagano et al, 2005). These numerical analyses have some advantages over the more traditional methods of analogy and theoretical inference because they are inherently more objective and deterministic, producing explicit quantitative predictions.…”