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Tyrannosaurus is a featured article; it (or a previous version of it) has been identified as one of the best articles produced by the Wikipedia community. Even so, if you can update or improve it, please do so.

This article appeared on Wikipedia's Main Page as Today's featured article on September 12, 2006.

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Date	Process	Result
May 22, 2005	Peer review	Reviewed
November 24, 2005	Peer review	Reviewed
November 28, 2005	Featured article candidate	Not promoted
July 24, 2006	Featured article candidate	Promoted
November 22, 2008	Featured topic candidate	Not promoted
Current status: Featured article

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A fact from this article was featured on Wikipedia's Main Page in the On this day section on August 12, 2004 and August 12, 2007.

Tyrannosaur Paleobiology: New Research on Ancient Exemplar Organisms

Brusatte et al. (2010) Tyrannosaur Paleobiology: New Research on Ancient Exemplar Organisms. Science Vol. 329. no. 5998, pp. 1481 - 1485.doi:10.1126/science.1193304

Tyrannosaurs, the group of dinosaurian carnivores that includes Tyrannosaurus rex and its closest relatives, are icons of prehistory. They are also the most intensively studied extinct dinosaurs, and thanks to large sample sizes and an influx of new discoveries, have become ancient exemplar organisms used to study many themes in vertebrate paleontology. A phylogeny that includes recently described species shows that tyrannosaurs originated by the Middle Jurassic but remained mostly small and ecologically marginal until the very end of the Cretaceous. Anatomical, biomechanical, and histological studies of T. rex and other derived tyrannosaurs show that large tyrannosaurs could not run rapidly, were capable of crushing bite forces, had accelerated growth rates and keen senses, and underwent pronounced changes during ontogeny. The biology and evolutionary history of tyrannosaurs provide a foundation for comparison with other dinosaurs and living organisms.

Bipedalism

What advantage can the animal have derived from being bipedal? You can't imagine leopards etc walking on their back legs only. I can only think that it's increased height must have helped it. Does anyone know anything about this? Smokey TheCat 07:44, 30 May 2011 (UTC)[reply]

All theropods of any size are bipedal, so that wouldn't make sense. FunkMonk (talk) 10:13, 30 May 2011 (UTC)[reply]

Well, all theropods then. The question remains. Bipedalism is very rare so I am curious. All modern hunting animals use their front legs to grab their prey. The theropods couldn't have done this as their forearms are too short. Smokey TheCat 06:02, 19 July 2011 (UTC)[reply]

You must mean virtually all Tyrannosaurs - many theropods had arms long enough to be useful in holding on to prey - aka Spinosaurus, the various raptors, etc. HammerFilmFan (talk) 21:18, 19 September 2011 (UTC)[reply]

It's by no means rare to see a bipedal carnivore. Have you forgotten about every sort of carnivorous bird that has ever existed?--137.146.143.192 (talk) 19:47, 29 September 2011 (UTC)[reply]

New Tyranosaur theory

Recently people found 68 specimens of tabosaurs very close together including juveniles. A new theory has emerged, we belive tabosaurs along with other tyranosaurides might have been pack hunters. We have some evidence such as the size of its brain showing enlarged sensory organs and the new fact that juveniles can run at speeds of 40 miles per hour. Here is link http://dsc.discovery.com/videos/dino-gangs-videos/#icpgn=vvdsc . Hopefully however wrote will add this new theory to the pages information and Im glad to have help. — Preceding unsigned comment added by 96.243.233.106 (talk) 18:13, 13 July 2011 (UTC)[reply]

Define "new" - this theory, virtually accepted as fact now, has been around for a decade at least. HammerFilmFan (talk) 21:19, 19 September 2011 (UTC)[reply]

Accepted as fact? By whom? AFAIK only Phil Currie and maybe Bob Bakker support it. MMartyniuk (talk) 22:44, 19 September 2011 (UTC)[reply]

Arms

Would T-rex's arms have been visible when it was alive. You can see vestigial limbs on the skeletons of some snakes, but they are not visible on a living animal. Perhaps this was the case with tyrannosaurs too. — Preceding unsigned comment added by 24.36.148.242 (talk) 06:59, 15 August 2011 (UTC)[reply]

Yes they would have. The presence of tendon avulsions demonstrate they were likely used while subduing prey. Abyssal (talk) 19:37, 15 August 2011 (UTC)[reply]

Tyrannosaurus' arms were not vestigial in any sort of way. So yes, they would have been visible.--137.146.143.192 (talk) 19:49, 29 September 2011 (UTC)[reply]

Some confusion?

As I told in the Tyrannosaurus in popular culture discussion page (here) I think there's some confusion between two Tyrannosaurus paintings by Charles R. Knight. Can anybody bring some help to clarify the question ? Kintaro (talk) 15:34, 25 August 2011 (UTC)[reply]

I edited the article. End of the story. Kintaro (talk) 18:06, 8 September 2011 (UTC)[reply]