Reanalysis of Tyrannosaurus rex Mass Spectra

Cannibalism in Tyrannosaurus rex

BACKGROUND Tyrannosaurus rex was one of the largest terrestrial carnivores of all time, and consequently its ecology and diet have been the focus of much discussion. However, there is little direct evidence of diet or feeding habits in this species. METHODOLOGY/PRINCIPAL FINDINGS Examination of museum collections has revealed four specimens of Tyrannosaurus rex that bear tooth marks made by l...

English as Tyrannosaurus rex

The increasing domination of English as the world's leading medium of international professional communication has begun to impact English for Academic Purposes programs. Specifically, questions arise as to whether English is becoming too successful. This paper reviews several of the resulting ideological challenges to EAP. Although not all of these challenges are accepted as well-founded, the ...

Molecular phylogenetics of mastodon and Tyrannosaurus rex.

We report a molecular phylogeny for a nonavian dinosaur, extending our knowledge of trait evolution within nonavian dinosaurs into the macromolecular level of biological organization. Fragments of collagen alpha1(I) and alpha2(I) proteins extracted from fossil bones of Tyrannosaurus rex and Mammut americanum (mastodon) were analyzed with a variety of phylogenetic methods. Despite missing sequen...

Craniocervical feeding dynamics of Tyrannosaurus rex

—Tyrannosaurus rex and other tyrannosaurid theropods exerted high bite forces, and large muscle attachments suggest that the tyrannosaurid neck was a concomitantly powerful component of the feeding apparatus. We examine accelerative and work-generating capacity (WGC) of neck muscles in adult Tyrannosaurus rex, using a 3-D vector-based method that incorporates aspects of muscle force generation,...

The Body Temperature of Tyrannosaurus rex.