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Tyrannosaurus is the type genus of the superfamily Tyrannosauroidea, the family Tyrannosauridae, and the subfamily Tyrannosaurinae; in other words it is the standard by which paleontologists decide whether to include other species in the same group. Other members of the tyrannosaurine subfamily include the North American Daspletosaurus and the Asian Tarbosaurus, [18] [60] both of which have occasionally been synonymized with Tyrannosaurus. [61] Tyrannosaurids were once commonly thought to be descendants of earlier large theropods such as megalosaurs and carnosaurs, although more recently they were reclassified with the generally smaller coelurosaurs. [49]

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a b Macas, Trisha (June 28, 2016). "Bebe Rexha: Music is about making people know they're not alone". GMA Network. Archived from the original on September 23, 2016 . Retrieved August 13, 2016. 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. doi: 10.1111/j.1469-7998.1985.tb04915.x. The largest known T. rex skulls measure up to 1.54 meters (5ft) in length. [20] [31] 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. It was extremely wide at the rear but had a narrow snout, allowing unusually good binocular vision. [44] [45] The skull bones were massive and the nasals and some other bones were fused, preventing movement between them; but many were pneumatized (contained a "honeycomb" of tiny air spaces) and thus lighter. These and other skull-strengthening features are part of the tyrannosaurid trend towards an increasingly powerful bite, which easily surpassed that of all non-tyrannosaurids. [46] [47] [48] The tip of the upper jaw was U-shaped (most non-tyrannosauroid carnivores had V-shaped upper jaws), which increased the amount of tissue and bone a tyrannosaur could rip out with one bite, although it also increased the stresses on the front teeth. [49] Skull replica of specimen "Sue", showing dentition a b Currie, P. J.; Hurum, J. H.; Sabath, K. (2003). "Skull structure and evolution in tyrannosaurid dinosaurs" (PDF). Acta Palaeontologica Polonica. 48 (2): 227–234 . Retrieved October 8, 2008. Walton, T. (2016). "Forget all you know from Jurassic Park: For speed, T. rex beats velociraptors". USA Today . Retrieved March 13, 2016.

a b "Expectations by Bebe Rexha". iTunes Store. Archived from the original on September 9, 2018 . Retrieved April 14, 2018. In 2001, Bruce Rothschild and others published a study examining evidence for stress fractures and tendon avulsions in theropod dinosaurs and the implications for their behavior. Since stress fractures are caused by repeated trauma rather than singular events they are more likely to be caused by regular behavior than other types of injuries. Of the 81 Tyrannosaurus foot bones examined in the study, one was found to have a stress fracture, while none of the 10 hand bones were found to have stress fractures. The researchers found tendon avulsions only among Tyrannosaurus and Allosaurus. An avulsion injury left a divot on the humerus of Sue the T.rex, apparently located at the origin of the deltoid or teres major muscles. The presence of avulsion injuries being limited to the forelimb and shoulder in both Tyrannosaurus and Allosaurus suggests that theropods may have had a musculature more complex than and functionally different from those of birds. The researchers concluded that Sue's tendon avulsion was probably obtained from struggling prey. The presence of stress fractures and tendon avulsions, in general, provides evidence for a "very active" predation-based diet rather than obligate scavenging. [217] Billboard Hit 100". January 21, 2017. Archived from the original on May 10, 2014 . Retrieved January 10, 2017.

Bebe Rexha: Love Letter to the LGBTQ Community". Billboard. Archived from the original on November 20, 2018 . Retrieved November 20, 2018.Even if T. rex does exhibit evidence of homeothermy, it does not necessarily mean that it was endothermic. Such thermoregulation may also be explained by gigantothermy, as in some living sea turtles. [137] [138] [139] Similar to contemporary crocodilians, openings (dorsotemporal fenestrae) in the skull roofs of Tyrannosaurus may have aided thermoregulation. [140] Soft tissue T.rex femur (MOR 1125) from which demineralized matrix and peptides (insets) were obtained And while they had strong thighs, these dinosaurs were not speedy. They could only walk briskly at up to 12 miles an hour—likely not fast enough to chase a speeding Jeep, as depicted in the movie Jurassic Park. Using biomechanical models, scientists have theorized that if these heavy animals moved any faster, they would have shattered the bones in their feet. Growth spurts and extinction Bebe's biggest musical influence is Queen of R&B Lauryn Hill". Capital Extra. March 6, 2018. Archived from the original on June 25, 2018 . Retrieved June 25, 2018.