Two tyrannosaurs are featured in Crichton's novel: a juvenile and an adult. Robert Muldoon, the theme park's game warden, refers to the adult on several occasions as "Rexy". [44] Visual-effects artist Phil Tippett had worked on the original film, and his storyboards referred to the T. rex as "Roberta". The films themselves do not specify a name for the animal. Following the release of Jurassic World, fans began referring to the individual as "Rexy". [45] [46] The name was later used in the 2018 novel The Evolution of Claire, [47] and is also used by Sammy, a character in Camp Cretaceous. Tyrannosaurus rex, whose name means “ king of the tyrant lizards,” was built to rule. This dinosaur’s muscular body stretched as long as 40 feet—about the size of a school bus—from its snout to the tip of its powerful tail. Weighing up to eight tons, T. rex stomped headfirst across its territory on two strong legs. These dinosaurs likely preyed on living animals and scavenged carcasses—and sometimes they even ate one another. Jurassic World director Colin Trevorrow as well as Industrial Light and Magic members Geoff Campbell and Steve Jubinville have stated that the T. rex from Jurassic World was indeed the same individual that appeared in Jurassic Park.

Bennett, Tara (September 2, 2022). "The big change in the 'Jurassic World Dominion' Extended Cut? T. rex gets a bigger story". Syfy . Retrieved January 8, 2023. The physical appearance of the T. rex in the Jurassic World films is contrary to new discoveries about the dinosaur. For consistency, the films have continued to depict the dinosaur with its wrists pointing downward at an unnatural angle, whereas the real animal had its wrists facing sideways toward each other. [42] The Jurassic World Dominion prologue features the animal lightly covered in protofeathers. [28] [43] Name [ edit ] A scene in the first film depicts the T. rex chasing a Jeep. [10] [36] Animator Steve Williams said he decided to "throw physics out the window and create a T. rex that moved at sixty miles per hour even though its hollow bones would have busted if it ran that fast". [37] In the film, it is stated that the T. rex has been recorded running as fast as 32 miles per hour, [38] although scientists believe that its actual top speed would have ranged from 12 to 25 miles per hour. [38] [39] [40] In the novel and its film adaptation, it is stated that the T. rex has vision based on movement, but later studies indicate that the dinosaur had binocular vision, like a bird of prey. [39] [41] Sarmiento, Rafarl (May 19, 2020). "The 10 Best Dinosaurs In The Jurassic Park Franchise, Ranked". Screen Rant.

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In January 2020, a study of the fossils of Nanotyrannus—a smaller tyrannosaur that was believed to have lived alongside T. rex—revealed that the bones were more likely from a juvenile T. rex than another species . If so, the study then suggests that Tyrannosaurus rex’s growth rate varied as it aged, and it could slow down its growth when food was scarce, a major evolutionary advantage. Celestino, Mike (2016-12-08). "PHOTOS: A visit to legendary visual effects house Industrial Light & Magic at Lucasfilm's campus in San Francisco". Inside the Magic . Retrieved 2023-01-25. Desowitz, Bill (June 25, 2022). " 'Jurassic World: Dominion': How the Giganotosaurus Became the Joker of the Franchise". IndieWire . Retrieved June 28, 2022. Got a response from the great @colintrevorrow about Dominion. Though conflicting arguments about the Rex…as an actor, I’d love to work on a project with you, sir. Respect and admiration for your work, sir. Hope we can talk about it face to face someday! #JurassicWorldDominion,” he wrote. The head of a T. rex was the real stuff of nightmares. This fierce carnivore was optimally built for crunching through its meals, with a stiff skull that allowed it to channel all the force of its muscles into one bite— delivering up to six tons of pressure. This dinosaur used its 60 serrated teeth, each about eight inches long, to pierce and grip flesh, throwing prey into the air and swallowing it whole. To keep itself from overheating while crushing prey with its mighty jaws, the giant animal had vents in its head to help its brain stay cool, similar to those found in alligators.

Truitt, Brian (June 11, 2022). "Get it, girl! An ode to the T. rex, the true unsung hero of the 'Jurassic World' franchise". USA Today . Retrieved January 8, 2023.

We ended up purchasing a second one for our 2 year old because he loved the 6 year old's that much. Oftentimes he'd pound at his door and yell 'dinosaur' until he either got it or he was dragged away screaming. On the other hand, Rexy's interactions with gigantosaurs, a species of larger dinosaurs, appear to be more focused on confirming their state of being truly deceased rather than consuming them. This behavior suggests that Rexy possesses an inherent ability to sense when an animal is deceased. It is intriguing to observe this instinctual behavior, as it highlights Rexy's ability to discern between living and deceased organisms. You realize at the end that it's kind of a revenge picture. It's just ‘Death Wish,’” Trevorrow tells USA TODAY with a laugh. “I really wanted to create a moment where you weren't sure: Is this the beloved character that they're going to kill in this movie? Because it's possible. We could have done that. And I know how much that would've deeply upset a lot of people and yet playing on that emotional fear is something I'm OK doing.” Rexy may be the first dinosaur to obtain the "anti-hero" label (second being Blue, third Bumpy, fourth Big Eatie, and fifth Stiggy). Crichton, Michael (1990). Jurassic Park (2012ed.). Random House Publishing Group. pp.303, 322, 324. ISBN 978-0-307-76305-1 . Retrieved January 8, 2023.

In Jurassic World, the island is home to a dinosaur theme park that has operated for years, with the T. rex as a prime attraction. The animal has a reduced role compared with the original film, appearing primarily at the end to battle the escaped Indominus rex; it succeeds with help from a Mosasaurus and a Velociraptor named Blue. Isla Nublar is abandoned by the end of the film, leaving the T. rex and other dinosaurs to reclaim the island. Paleontologists suggested a wide range of maximum running speeds for Tyrannosaurus. For a time, given the size of its legs, it was speculated that Tyrannosaurus could run 45 mph (72 km/h). Later from 2002 to 2017, applying Tyrannosaurus physiology to modern reptiles and birds and given its heavy-size, they downsized its top speed between 25-35 mph (40-56 km/h). In 2019, studies officially declared Tyrannosaurus maximum speed at 11 mph (18 km/h). It has been suggested that if an adult Tyrannosaurus even tried running faster than 11 mph, their bones would shatter and break. However, while the adults were slow, it is possible that the juveniles could run at greater speeds. Speaking about Dominion, Trevorrow described the Cretaceous fight as an origin story for the T. rex "in the way we might get to do in a superhero film. The T-Rex is a superhero for me". [28] Regarding its death to the Giganotosaurus, Trevorrow called it "such a horrifying loss for all of us who grew up with the T. rex. To build this into something that feels like a revenge picture that takes place over 65 million years was one of my favorite ideas that we had". [29] At the end of Dominion, the T. rex encounters two other tyrannosaurs, which Trevorrow confirmed as the same duo featured in The Lost World: Jurassic Park (1997). [30] Trevorrow said he wanted to "really make the audience want her to find peace. We want her to find a home. She feels like she has been constantly displaced, time and time again. For her to find a family and sense of belonging is what I want". [31] Rexy was the largest carnivore living on Isla Nublar; as such, she is a fearless, bold, powerful and a domineering beast that walks the line between heroine and villainess, largely motivated by two goals: Keep intruders off her territory and eat any prey that she finds there. [2] Even twenty-plus years older, she was still relentless and very vigorous. She was shown roaring and launching herself at the Indominus rex the first moment she saw it. [3] She also appears to be fairly efficient at stealth, as she caught Dr. Grant, Ellie Sattler, Lex and Tim Murphy, [2] and Eli Mills completely by surprise, [4] as neither of them saw or heard her coming.Eisenberg, Eric (April 22, 2021). "Sorry Jurassic Park, New Research About The T-Rex Blows A Hole In Some Iconic Scenes". CinemaBlend . Retrieved June 6, 2021.

Weiss, Josh (June 20, 2022). "Was the T. rex 'weak' in 'Jurassic World Dominion'? Colin Trevorrow defends our favorite dino". Syfy . Retrieved June 28, 2022. Rexy is 34 years old. Dominion director/co-writer Colin Trevorrow alluded to her age possibly being the reason she was at such a large disadvantage against the Giganotosaurus. [26] This also makes Rexy the most reoccurring individual dinosaur in the film series and the most reoccurring individual dinosaur across all media when including expanded material. Vaaler, J. E. [Jens Erik]. (September 15, 2021). Species Field Guide - Tyrannosaurus Rex [Online forum post]. Frontier Forums. Retrieved October 31, 2021.Jurassic Park's T-Rex – Sculpting a Full-Size Dinosaur". Stan Winston School of Character Arts. December 15, 2012 . Retrieved January 5, 2014. Jurassic World Camp Cretaceous is a television series set during and after the events of Jurassic World. The same T. rex appears several times in the series, terrorizing teenage campers who are stranded on Isla Nublar. Tyrannosaurus was among the first species of dinosaur successfully cloned by InGen, intending to be displayed as an attraction in Jurassic Park on Isla Nublar. During the 1993 incident and subsequent abandonment of the park, the Tyrannosaurus escaped from its exhibit where it roamed free on the island for a time. [1] In 1994, InGen sent a recovery team to Isla Nublar, moving the island's Tyrannosaurus to an unknown location prior to its exhibition in Jurassic World many years later. [2] While the “Jurassic” films have brought in more massive creatures every time – and even invented new hybrid species – the T. rex has always had an intriguing part to play. For kids fascinated by dinosaurs, before Steven Spielberg set them loose in theaters, there has always been something inherently cool and dangerous about the T. rex: Brontosaurus was the cute one, Triceratops had the horns, Stegosaurus sported the nifty armor plates, but the T. rex was both supremely awesome and the one you were most glad went extinct. Infamous for being called the king of the dinosaurs, Tyrannosaurus had a bite force of almost 6,000 kg of pressure, giving it arguably the strongest jaws ever seen amongst terrestrial carnivores with only extremely large crocodilians (i.e. Deinosuchus) and marine predators, such as the Mosasaurus and the Megalodon, have rivaled or surpassed it in sheer bite force. Large individuals could reach lengths of 43 feet and grow to 13 feet tall, with the average still being a respectably huge 40 feet long and 12 feet tall. However, new research estimates that Tyrannosaurus may have grown bigger than previously thought. Its teeth are actually blunt and relied more on the bite force than a serrated edge like other theropods. This was an adaptation to crush bones and bite through body armor, allowing adult Tyrannosaurus to both bring down armored prey such as ankylosaurids and ceratopsians, as well as process a carcass efficiently by crunching bones and tougher tissues to eat.