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<h1>Tyrannosaurus</h1>
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Tyrannosaurus is a genus of coelurosaurian theropod dinosaur. The species Tyrannosaurus rex (rex meaning "king" in Latin), often called T. rex or colloquially T-Rex, is one of the most well-represented of the large theropods.
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<h2 id="description">Description</h2>
<h3>Size</h3>
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Tyrannosaurus Rex was one of the largest land carnivores of all time. One of the largest and the most complete
specimen, nicknamed Sue (FMNH PR2081), is located at the Field Museum of Natural History. Sue measured 12.8
meters (42 ft) long,was 3.66 meters (12 ft) tall at the hips, and according to the most recent
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<p>
A specimen nicknamed Scotty (RSM P2523.8), located at the Royal
Saskatchewan Museum, is reported to measure 13 m (43 ft) in length. Using a mass estimation technique that
extrapolates from the circumference of the femur, Scotty was estimated as the largest known specimen at 8.8
metric tons (9.7 short tons) in weight
<span class="health-references__links">
(<span class="health-references__link" title="Boyle J &amp; Eades S (2016) Closing the gap in Aboriginal women’s reproductive health: some progress, but still a long way to go. <cite>Aust N Z J Obstet Gynaecol </cite>56(3): 223-4">Anderson, J. F. 1985</span>)
</span>.
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<p>
Source: <a href="https://en.wikipedia.org/wiki/Tyrannosaurus#/media/File:Tyrannosaurus-rex-Profile-steveoc86.png">Wikipedia</a>
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<p>
The discovery of feathered dinosaurs led to debates if, and to what extent, Tyrannosaurus might have been
feathered. Filamentous structures, which are commonly recognized as the precursors of feathers, have
been reported in the small-bodied, basal tyrannosauroid Dilong paradoxus from the Early Cretaceous Yixian
Formation of China in 2004. Because integumentary impressions of larger tyrannosauroids known at that time
showed evidence of scales, the researchers who studied Dilong speculated that insulating feathers might have
been lost by larger species due to their smaller surface-to-volume ratio.
</p>
<div class="health-table__responsive">
<table class="health-table">
<caption>
<p class="au-display-sm">Comparison of dinosaur sizes</p>
</caption>
<tbody>
<tr>
<th>Dinosaur</th>
<th>Weight</th>
<th>Length</th>
</tr>
<tr>
<td>Spinosaurus
<sup class="health-footnotes__links">
[<span class="health-footnotes__link" title="Sizes are given with a range, where possible, of estimates that have not been contradicted by more recent studies">1</span>]
</sup>
</td>
<td>21 tonnes</td>
<td>18 meters</td>
</tr>
<tr>
<td>Tyrannosaurus rex</td>
<td>18 tonnes</td>
<td>13 meters</td>
</tr>
<tr>
<td>Carcharodontosaurus</td>
<td>15 tonnes</td>
<td>14 meters</td>
</tr>
<tr>
<td>Giganotosaurus</td>
<td>14 tonnes</td>
<td>14 meters</td>
</tr>
<tr>
<td>Acrocanthosaurus
<sup class="health-footnotes__links">
[<span class="health-footnotes__link" title="Sauropodomorph size is difficult to estimate given their usually fragmentary state of preservation">2</span>]
</sup>
</td>
<td>7 tonnes</td>
<td>11 meters</td>
</tr>
</tbody>
<tfoot>
<tr>
<td colspan="3">
<ul class="health-footnotes list--remove text--minor">
<li class="row">
<span class="col-xs-1">1</span>
<span class="col-xs-11">One study of Tyrannosaurus specimens with tooth marks in the bones attributable to the same genus was presented as evidence of cannibalism.</span>
</li>
<li class="row">
<span class="col-xs-1">2</span>
<span class="col-xs-11">Evidence of intraspecific attack were found by Joseph Peterson and his colleagues in the juvenile Tyrannosaurus nicknamed Jane</span>
</li>
</ul>
</td>
</tr>
</tfoot>
</table>
</div>
<h3>Get the factsheet on how awesome the Tyrannosaurus is</h3>
<p>
The discovery of feathered dinosaurs led to debates if, and to what extent, Tyrannosaurus might have been
feathered.
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<h3>Skeleton</h3>
<p>
The largest known Tyrannosaurus rex skull measures up to 1.52 meters (5 ft) in length. Large fenestrae
(openings) in the skull reduced weight, as in all carnivorous theropods. In other respects Tyrannosaurus's skull
was significantly different from those of large non-tyrannosaurid theropods.
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<h2 id="history">History of research</h2>
<p class="au-callout">
More than 20 almost-complete t rex skeletons have been found. The most perfect, nicknamed Sue, was unearthed in South Dakota, USA, 20 years ago.
</p>
<p>Teeth from what is now documented as a Tyrannosaurus rex were found in 1874 by Arthur Lakes near Golden,
Colorado. In the early 1890s, John Bell Hatcher collected postcranial elements in eastern Wyoming. The fossils
were believed to be from a large species of Ornithomimus (O. grandis, now Deinodon grandis) but are now
considered Tyrannosaurus rex remains.</p>
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<p><i>NARRATOR:</i> It's one of the most mysterious dinosaurs ever discovered: head like a crocodile, meter-long jaws, a spectacular sail, and an overall body larger than T. rex.</p>
<p><i>NIZAR IBRAHIM (University of Chicago):</i> There is no animal alive or extinct, that we know of, that looks anything like <i>Spinosaurus</i> .</p>
<p><i>NARRATOR:</i> <i>Spinosaurus</i> : only one skeleton has ever been found, and, in a single night, it was destroyed.</p>
<p><i>HANS-DIETER SUES (National Museum of Natural History):</i> It was a catastrophic loss to science, overall.</p>
<p><i>NARRATOR:</i> Now, after a century of searching, a new skeleton has emerged from the Sahara.</p>
<p><i>MATT LAMANNA (Carnegie Museum of Natural History):</i> When this skeleton is revealed, it's going to change our understanding of this animal in pretty fundamental ways.</p>
</div>
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</section>
<p>
The largest known Tyrannosaurus rex skull measures up to 1.52 meters (5 ft) in length. Large fenestrae
(openings) in the skull reduced weight, as in all carnivorous theropods. In other respects Tyrannosaurus's skull
was significantly different from those of large non-tyrannosaurid theropods.
</p>
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<p class="au-display-md"><a href="#">Tyrannosaurus factsheet</a></p>
<p>Tyrannosaurus is a genus of coelurosaurian theropod dinosaur. The species Tyrannosaurus rex (rex meaning
"king" in Latin), often called T. rex or colloquially T-Rex, is one of the most well-represented of the large
theropods.</p>
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<p class="au-display-md"><a href="#">Tyrannosaurus video</a></p>
<p>Tyrannosaurus is a genus of coelurosaurian theropod dinosaur. The species Tyrannosaurus rex (rex meaning
"king" in Latin), often called T. rex or colloquially T-Rex, is one of the most well-represented of the large
theropods.</p>
</div>
</div>
<h2 id="facts">Amazing facts</h2>
<p>Impress your friends with these amazing Tyrannosaurus rex facts:</p>
<ol class="list--large">
<li>The T. Rex roamed the planet during the late Cretaceous Period 65 million years ago, in what’s now the USA and Canada.</li>
<li>The name Tyrannosaurus Rex comes from Greek and Latin words meaning ‘Tyrant Lizard King’.</li>
<li>The terrific T. Rex was a seriously big beast, growing up to 12m long and 6m tall!</li>
</ol>
<h2 id="getting-away">Getting away from a Tyrannosaurus rex</h2>
<p>These are some things you can try if you ever see a Tyrannosaurus rex:</p>
<ul class="list--large--checklist">
<li>Run away as fast as you can</li>
<li>Laugh at its little arms</li>
<li>Play dead</li>
</ul>
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<h2>Glossary</h2>
<dl class="health-dl">
<dt>AFBP</dt>
<dd>Aboriginal Family Birthing Program</dd>
<dt>AFP</dt>
<dd>α-fetoprotein</dd>
<dt>AGREE</dt>
<dd>Appraisal of Guidelines Research and Evaluation</dd>
<dt>AHMAC</dt>
<dd>Australian Health Ministers’ Advisory Council</dd>
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<h2>References</h2>
<ul class="list--remove text--minor standard-gap">
<li>
Anderson, J. F.; Hall-Martin, A. J.; Russell, D. (1985). "Long bone circumference and weight in mammals, birds and
dinosaurs". Journal of Zoology. 207 (1): 53–61
</li>
<li>
Henderson, D. M. (1999-01-01). "Estimating the masses and centers of mass of extinct animals by 3-D mathematical
slicing". Paleobiology. 25 (1): 88–106.
</li>
<li>
Carr, T. D.; Williamson, T. E. (2004). "Diversity of late Maastrichtian Tyrannosauridae (Dinosauria: Theropoda) from
western North America". Zoological Journal of the Linnean Society. 142 (4): 479–523
</li>
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<span class="col-xs-2 col-sm-1">1</span>
<span class="col-xs-10 col-sm-11">One study of Tyrannosaurus specimens with tooth marks in the bones attributable to the same genus was presented as evidence of cannibalism.</span>
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<span class="col-xs-2 col-sm-1">2</span>
<span class="col-xs-10 col-sm-11">Evidence of intraspecific attack were found by Joseph Peterson and his colleagues in the juvenile Tyrannosaurus nicknamed Jane</span>
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