rex specimens. Also, trichomoniasis can be quite promptly lethal in birds (fourteen times or fewer) albeit in its milder form, and this implies that if a Trichomonas-like protozoan could be the culprit, trichomoniasis was less acute in its non-avian dinosaur type over the Late Cretaceous. Last but not least, the relative dimensions of this sort of lesions is much larger in smaller bird throats, and will not are plenty of to choke a T. rex.[234] A More moderen research inspecting the pathologies concluded which the osseous alteration noticed most carefully resembles People all over therapeutic human cranial trepanations and therapeutic fractures from the Triassic reptile Stagonolepis, inside the absence of an infection. The probable lead to may perhaps alternatively are already intraspecific beat.[235]
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[206] This argument disregarded The truth that theropods replaced their tooth pretty swiftly. At any time considering that the initial discovery of Tyrannosaurus most scientists have speculated that it had been a predator; like modern day significant predators it would easily scavenge or steal A further predator's destroy if it had The chance.[207]
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Thomas Holtz Jr. would Notice that high depth notion of Tyrannosaurus may possibly have already been due to prey it needed to hunt, noting that it needed to hunt ceratopsians which include Triceratops, ankylosaurs for example Ankylosaurus, and hadrosaurs.
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Considering that at the least many of Tyrannosaurus's possible prey could transfer promptly, proof that it walked in place of ran could suggest that it absolutely was a scavenger.
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Recently, proof for sexual dimorphism is weakened. A 2005 study claimed that previous promises of sexual dimorphism in crocodile chevron anatomy have been in error, casting question over the existence of comparable dimorphism amongst T. rex sexes.[129] An entire-sized chevron was uncovered on the initial tail vertebra of Sue, an extremely sturdy personal, indicating this attribute couldn't be utilized to differentiate the two morphs anyway.
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