Tyrant Dinosaur Evolution Tracks the Rise and Fall of Late Cretaceous Oceans Loewen, Mark A. ; Irmis, Randall B. ; Sertich, Joseph J. W. ; Currie, Philip J. ; Sampson, Scott D. Abstract Publication: PLoS ONE Pub Date: November 2013 DOI: 10.1371/journal.pone.0079420 Bibcode: 2013PLoSO...879420L