Shake a Tail Feather: The Evolution of the Theropod Tail into a Stiff Aerodynamic Surface Pittman, Michael ; Gatesy, Stephen M. ; Upchurch, Paul ; Goswami, Anjali ; Hutchinson, John R. Abstract Publication: PLoS ONE Pub Date: May 2013 DOI: 10.1371/journal.pone.0063115 Bibcode: 2013PLoSO...863115P