Among extant species, the ability to sample the extremes of body size—one of the most
useful predictors of an individual's ecology—is highly unlikely. This improbability is further …

Abstract In the Late Cretaceous, northern and southern hemispheres evolved distinct
dinosaurian faunas. Titanosaurians and abelisaurids dominated the Gondwanan continents; …

Modern birds possess highly encephalized brains that evolved from non-avian dinosaurs.
Evolutionary shifts in developmental timing, namely juvenilization of adult phenotypes, have …

Tyrannosaurids were the most derived group of Tyrannosauroidea and are characterized by
having two body plans: gracile, long-snouted and robust, deep-snouted skulls. Both groups …

Tyrannosauroids are a clade of theropod dinosaur taxa that varied greatly in their body size
distribution. We investigated the feeding performance of six tyrannosaur genera of variable …

The end of the Cretaceous saw the Western Interior Seaway divide North America into two
land masses, Laramidia in the west and Appalachia in the east. Laramidian dinosaurs …

66 million years ago, the giant Tyrannosaurus rex appeared suddenly in the Great Plains of
western North America. 40 feet long and weighing 8 tons or more, it was among the largest …