T-Rex's closest living relatives, birds, all have extremely WASHINGTON The hot question of whether dinosaurs were warm-blooded like birds and mammals or cold-blooded like reptiles, fish and amphibians finally has a good answer. From this kind of hypothesizing, we can guess that Sue lived a long and exciting life. How do I choose between my boyfriend and my best friend? As in, did they move quickly or slowly? Tyrannosaurus rex was an athletic, warm-blooded animal that jogged rather than lumbered around its territory, according to a new study. Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. What color were brontosaurus? It was the last known member of the tyrannosaurids and among the last non-avian dinosaurs to exist before the CretaceousPaleogene extinction event. Who is called Father of documentary? In The Lost World: Jurassic Park it was revealed that male Tyrannosaurus rex have green colored skin. In only one living creature: birds. We don't. Movies know it was based on movement. Some paleontologists have suggested this was a possibility because a lot of carnivores see stuff th INSKEEP: That's Jakob Vinther of the University of Bristol in Britain. Today, in living birds, this air sac system constantly bathes the lungs in fresh air, making these creatures the most efficient breathers anywhere. Sight: T. rex had an eye about the size of a softball, one of the largest eyes ever developed in the animal kingdom past or present. Brontosaurus Pictures. Allosauroids, including Carcharodontosaurus[1] and Allosaurus, did not have very good binocular vision, comparable to modern crocodiles. If so, then - as in today's birds of prey - males and females might have been the same, or similar colors. T. rexes, similarly, were spectacular but died quite young. What color is a t rex? A baby T. rex had a more than 60% chance of succumbing to predators, disease, accidents, or starvation during its first year of life. Yes! All dinosaurs almost certainly had excellent color vision. It was probably better than our own. T-Rex's closest living relatives, birds, all h Their limbs were very robust and the arms were stout. An interesting fact about the Brontosaurus was that it stood approximately 15 feet high at the hips, and had a length of about 90 feet. WebT. Here's what the T. rex was really like when it hunted 66 million years ago, according to the experts at the AMNH. They did not act like mammals or birds, nor did they act like reptiles or fish," said University of Arizona evolutionary biologist and ecologist Brian Enquist. T. rex hatchlings were covered in peach fuzz, much like a duckling. Sight: T. rex had an eye about the size of a softball, one of the largest eyes ever developed in the animal kingdom past or present. Appearance: It had a really long neck and tail as well as a small head. Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. Begin typing your search term above and press enter to search. An Average T Rex brain was weighed about 1 kg, or 2.2 lbs, about half the size of an average human brain. WebAnswer (1 of 2): Yes! T. rex had a wide field of binocular vision around 55 degrees. She is also revealed to be the last of her species by Eli Mills. Without any doubt, we can tell you the Jurassic Park raptors were BROWN. a) + b) 0 b) ? Just imagine: a four-ton ostrich! Diplodocus was different from Brontosaurus in a number of ways, Diplodocus had a much longer tail and its neck was longer and more slender than Brontosaurus. But nothing in the fossil record has saved an indication of pigment. And if you took a look at the melanosomes in my beard, they will be shaped like little meatballs. Was it brightly colored, or safely green, or gray? These cookies track visitors across websites and collect information to provide customized ads. You also have the option to opt-out of these cookies. It turns out that T. rex had pretty amazing visionbetter than people and even hawks have. Scientists have been able to learn a lot about dinosaurs by studying fossils. NPR transcripts are created on a rush deadline by an NPR contractor. Necessary cookies are absolutely essential for the website to function properly. D. Finnin/American Museum of Natural History. WebDid T. rex have color vision? rex, unlike most dinosaurs, had a combination of powerful eyesight and a great sense of smell. They were dark green, brown, or black in color and very rarely, the Brontosaurus was light in color. What kind of diet did a Brontosaurus have? Here are the facts: Smell: A dog's "smelling part" of its brain takes up about one-fourth of the brain case, and it's our Excellent Smeller model. While Velociraptor would have beaten T. rex in a game of chess - because its cerebrum, the brain's "thinking" part, was relatively larger - T. rex still was no dummy. VINTHER: The kinds of hair colors that we see in humans, ranging from black to ginger, are made by melanin. How tall was the Brontosaurus in Jurassic Park? One method to guess a T. rex's age is to compare it with living animals. Director Steven Spielberg and the movie's screenwriters dropped the ball big time here, importing the dinosaurs vision problems but not the explanation for them. T. rex had a bite force of 7,800 pounds, equivalent to the crushing weight of about three Mini Cooper cars. We have prepared a Special Assignment in which you will But why so short? What was the name of the Brontosaurus dinosaur? 2023 Minute Media - All Rights Reserved. The largest species, B. excelsus, weighed up to 15 t (17 short tons) and measured up to 22 m (72 ft) long from head to tail. About the size of oranges, T. rex eyes faced forward like a hawk's and were spread farther apart on its face than most other dinosaurs' eyes, giving it superior depth perception during a hunt. Several upper arm bones (humeri) show healed injuries - injuries that wouldn't have been possible unless T. rex was using its limbs. Neither The hot question of whether dinosaurs were warm-blooded like birds, or cold-blooded like reptiles, finally has a good answer. And as it turns out, these predators started their lives as fuzzy, turkey-sized hatchlings. Did T. rex have color vision? Tyrannosaurus rex is one of the dinosaurs whose body mass and growth rate was analyzed to determine their warm- or cold-bloodedness. Walking with bent legs would have placed immense stress on its bones and joints, quickly exhausting its leg muscles. No other known animal could bite with such force, according to museum paleontologists. Binocular vision Binocular vision: Tyrannosaurus rex used both eyes together (binocular vision) to give it accurate depth perception. This text may not be in its final form and may be updated or revised in the future. Dinosaurs lived 65 million years ago or more, and this same technique might be used to conclude that T. rexs were that brownish color that you see in the movie or maybe something closer to Barney purple. Diplodocus and Brontosaurus were closely related. Dilophosaurus The poison-spitting dinosaur reconstructed in Jurassic Park is Dilophosaurus. This cookie is set by GDPR Cookie Consent plugin. evidence for your statement? Warmblooded animals need to eat a lot, so they are frequently hunting or munching on plants. This dinosaur is best known for its large neck, which serves as sort of a counter balance for its long tail. Thank you for your patience. Dinosaurs sit at an evolutionary point between birds, which are warm-blooded, and reptiles, which are cold-blooded. Tyrannosaurus rex is one of the A tiny bird-like dinosaur with long legs and muscular, clawed arms was quite the night owl. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. When we compare the legs of T. rex to those of Edmontosaurus, and Triceratops (its two main food groups), we find that T. rex legs have relatively longer lower limb bones (tibia and metatarsals) and that T. rex has much longer total leg length. But Ive been nagged by one thing thats stuck with me from the first time I saw the moviea thing that has been ingrained in our collective knowledge and perception of dinosaurs: protagonist Alan Grant's assertion about what the Tyrannosaurus rex can and cant see. Whats the spitting dinosaur in Jurassic Park? But to be fair to Steven Spielberg, only seven or eight T. rex skeletons existed in the fossil record when his classic movie was produced in 1993. IE 11 is not supported. For more on other JP mistakes that make dino geeks fume, see this Wikipedia list. It's hard to know what the soft parts of extinct animals looked like. But the new museum exhibit suggests that, since reptiles come in every color, the T. rex could have been brightly colored. Juvenile T. rexes, which weighed less than an adult, could run. Their binocular field was up to 60. Their keenest sense was probably smell. 2) W. T. rex warm-blooded or 5) How many chambers were there cold blooded? Large internal chambers near the inner ear would have amplified low-frequency soundsbut not much more has been documented. WebCarnivore. This efficient oxygen-delivery process is only necessary in an animal with a high metabolic rate. They probably hunted Hadrosaurs and Triceratops. T. rex's closest relatives, crocodiles and some birds, can also live for 80 or more years, so it's not unreasonable to think that T. rex's maximum age might have been somewhere in that vicinity. Fossils are found in a variety of rock formations dating to the Maastrichtian age of the Upper Cretaceous period, 68 to 66 million years ago. Access your favorite topics in a personalized feed while you're on the go. The binocular vision of deinonychosaurs, such as Velociraptor and Stenonychosaurus was better than that of allosauroids and it matched or exceeded that of extant predatory birds. This would have included plenty One feature of Tyrannosaurus rex that everyone makes fun of is its arms, which seem disproportionately tiny compared to the rest of its massive body. And according to official JP3 size chart, The JP3 Rex is 37ft long, and 14.5ft tall. Arguments about whether the dinosaur was a hunter or a scavenger have raged over the years, but "a bulk of the evidence points to T. rex being a predator, not a scavenger," Erickson said. We can compare her injuries to other large creatures who live a tough lifeand we can use living models to imagine how long it would take to heal from each injury. Accuracy and availability may vary. She couldn't have received all of these injuries in one fight, or she would have died from them. Perhaps T. rex used its hands as meat hooks, grasping and immobilizing the prey as it sheared off chunks of flesh with its jaws. And then if you have, for example, an American robin, they have this reddish-brown chest and they would also have these kinds of meatballs. And speaking of combat, there's a way to use a T. rex's injuries, or pathologies, to guess its age. A teacher walks into the Classroom and says If only Yesterday was Tomorrow Today would have been a Saturday Which Day did the Teacher make this Statement? The cookie is used to store the user consent for the cookies in the category "Other. How do we know what dinosaurs looked like? But other paleontologists say the opposite is true that dinosaurs skin could have been shades of purple, orange, red, even yellow with pink and blue spots! IT'S already the dinosaur of nightmares now it seems Tyrannosaurus rex might have been able to hunt after dark. The Brontosaurus was a herbivore. In the scene where the T. rex gets loose and attacks a group of human characters, Grant says to Lex, Dont move. What 4-way golf bags have full-length dividers fastened along all 4 edges, not just top and bottom. Title slide: Black background with on screen text: T.rex, Skeleton Crew. T. rexes, similarly, were spectacular, R. Mickens/American Museum of Natural History, D. Finnin/American Museum of Natural History, By comparison, the massive saltwater crocodile of northern Australia which grows to 17 feet and can weigh more than a ton chomps down with, Illustration by Zhao Chuang/Courtesy of PNSO, Tyrannosaurus rex has captivated the public imagination, Steven Spielberg's 1993 blockbuster was being made, Baby T. rexes were covered in peach fuzz and the size of small turkeys here's what they looked like, The American Museum of Natural History has created the most accurate depiction of what T. rex looked like in. T. rex, unlike most dinosaurs, had a combination of powerful eyesight and a great sense of smell. Since we can't watch the extinct animals walking or running, scientists use living animals as models to measure how long it takes them to step. They were dark green, brown, or black in color The T. rex was like "the James Dean of the dinosaurs," said Gregory Erickson, a paleontologist from Florida State University who consulted on the museum's new exhibit. A full-grown Tyrannosaurus rex weighed about 6 to 9 tons. Feathers are rarely preserved in the fossil record, so they haven't been found on a T. rex specimen. For what it's worth, Michael Crichton does explain in the Jurassic Park novel that the amphibian DNA used to help bring the dinosaurs to life hobbled their visual cortices. Evidence of events in a dinosaur's life make it possible for us to imagine a timeline. Did the t-rex have color vision? What did T Rex eat? According to a new technique that analyzes the chemistry of dinosaur eggshells, the answer is warm. However, one factor that might have cut short an otherwise long and happy T. rex life: being a carnivore is dangerous. As they aged, they lost most of their feathers, keeping just the ones on the head, neck, and tail. Dinah the Pink Dinosaur (sometimes referred to as Dinah the Dinosaur) is a 40-foot (12 m) tall anthropomorphized statue of a dinosaur, located in just off Main Street (US-40) in Vernal, Utah, United States. Alligators are not dinosaurs, though they belong to the same order as dinosaurs once did. WebIt turns out that T. rex had pretty amazing vision better than people and even hawks have. Analysis of these muscle scars shows that they could lift more than 200 kg (440 pounds) with each arm. We hope to see them published soon. Fossils tell us that dinosaurs had scaly skin, while some may have had feathers. We found a pregnant T. rex fossil and had DNA in it this is rare and this helps scientists take a step closer of animal cloning a Tyrannosaurus rex and other dinosaurs. Who first discovered gravitational lensing. For example, did T. rex's skin look like a lizard's, or maybe a rhino's? Combined with the shape of the head they had better binocular vision than allosauroids. They were a reddish-brown color. [citation needed], Pachycephalosaurs, like most of the plant-eaters, had eyes on the sides of the head, so they could quickly spot approaching predators. 9 How tall was the Brontosaurus in Jurassic Park? The Implication, part 2: Modern birds also have a large four-chambered heart and circulatory system to go with its respiratory system. Hes not. Let's add some color now to a story many millions of years old - the story of the dinosaurs. You can help Wikipedia by expanding it. I have been remembering the same by color vision by cones. cladogram and data tables). Finnin Brains Keep absolutely still, Jurassic Parks Alan Grant warns when T. rex emerges from the woods looking for a meal. Large animals like elephants live relatively long lives, as much as 80 years. The authoritative record of NPRs programming is the audio record. A 2016 study suggested that T. rex probably didn't roar, but most likely cooed, hooted, and made deep-throated booming sounds like the modern-day emu. Dinosaur vision was, in general, better than the vision of most other reptiles, although vision varied between dinosaur species. rex: The Ultimate Predator is a full-scale, full-color model into which the curators poured all the latest research. WebThey were dark green, brown, or blackin color and very rarely, the Brontosaurus was light in color. We dont. Were guessing. When "Jurassic Park" came out in 1993, scientists knew only that the T. rex was big and carnivorous and had a small brain, Erickson said. Read More: Baby T. rexes were covered in peach fuzz and the size of small turkeys here's what they looked like. Stevens was able to determine that T. Rexs binocular range was 55 degrees, which is greater than a hawk, which is known for its high visual acuity. While some feathered dinosaurs flew, others did not. In T. rex, it would have resulted in excellent dinosaur athletes who would have no trouble running the Boston Marathon! But opting out of some of these cookies may affect your browsing experience. rex probably didnt roar, but most likely cooed, hooted, and made deep-throated booming sounds like the modern-day emu. Paleontologists know from the fossil record that, over millennia, T. rexs eyes got larger and its snout got lower and narrower, giving it even clearer sight lines than Did T. rex have color vision? If ever an animal could be termed 'hot-blooded,' it was Tyrannosaurus rex. Experts can count the number of rings to determine its age, as well as compare the spaces between rings to find out how fast the dinosaur was growing at different ages. Photo: AMNH/D. Some think that the small arms of T. rex were the right size for holding prey near their jaws.. Mark Garlick / Science Photo Library / Getty Images. In the first analysis of proteins extracted from dinosaur bones, scientists say they have established more firmly than ever that the closest living relatives of the mighty predator Tyrannosaurus rex are modern birds. In Jurassic Park, remember when the kid was told to stand still so the can't-see-a-non-moving-boy T. rex wouldn't eat him? X is formed by a T. rex skull that chomps its jaws shut. Stevens' model study suggests that T. rex had a binocular range of around 55, better than that of modern-day hawks and eagles. The exhibit showcases the latest research on the prehistoric animal. Did T. rex sing to its offspring? "It is doubtful that a lion the size of T. rex could eat enough to survive," Grady said. The rear limbs of Tyrannosaurus rex are proportioned for speed. Vinther and scientists from Virginia Tech confirmed traces of melanin in fossils dating back millions of years, and that melanin may provide a vital clue. However, you may visit "Cookie Settings" to provide a controlled consent. So, without any real evidence either way, its entirely possible that a pink or purple dinosaur could have existed. evidence would you look for that would support or refute your hypothesis. The eyes of T. rex face forward, giving them stereoscopic vision for seeking prey. What is the As Zeus was to the Greeks, This gravitational lens was discovered by Dennis Walsh. However, the size of their eyes relative to the size of their head is more typical of an animal that is active during the day. WebDoes T. rex have four limbs?. This would have included plenty of space for black-and-white and color receptors; since its ancestors (crocs) and its descendants (birds) see in color, scientists think T. rex did, too. Home Travel Quick Answer: What Color Were T Rex. This would have included plenty It stood about 12 to 13 feet tall at the hip and was about 40 to 43 feet long. The cookie is used to store the user consent for the cookies in the category "Analytics". So this means that the juveniles gender is male. The cookies is used to store the user consent for the cookies in the category "Necessary". Is there a way to tell? Are Diplodocus and Brontosaurus the same? Dubbed the horniest dino in the world, Kosmoceratops boasted 15 horns and spikes on its head, including some on its forehead that curled downward like bangs. Do T. rex have good vision? [2], The position of the eyes of tyrannosaurids suggests that they had a very well developed sense of vision. More than half of its brain capacity! Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. MONTAGNE: So the researchers are presuming the shapes may also have matched the color of creatures from the distant past. INSKEEP: And now the next stop is Jurassic Park. Dinosaurs lived 65 million years ago or more, and this same technique might be used to conclude that T. rexs were that brownish color that you see in the movie or maybe something closer to Barney purple. In your justification, make sure that you include A T. rex's smelling part? If your image of Tyrannosaurus rex is based on the ferocious creature in "Jurassic Park," you've gotten quite a few things wrong about the "king of the dinosaurs.". In recent years, paleontologists have been revising the scientific consensus about how T. rex looked, sounded, and ate. Are there any planets in the Triangulum Galaxy? By clicking Sign up, you agree to receive marketing emails from Insider What color was a t rex? But other dinosaur fossils, including other tyrannosaur species and their relatives, do have preserved feathers. Found on a rush deadline by an npr contractor last non-avian dinosaurs to exist before the CretaceousPaleogene extinction.. Finally has a good answer, neck, and reptiles, although varied... Of their feathers, keeping just the ones on the head, neck, ate... My beard, they will be shaped like little meatballs efficient oxygen-delivery process is only in... The eyes of T. rex life: being a carnivore is dangerous cookies is used to provide with. A bite force of 7,800 pounds, equivalent to the experts at the melanosomes in my beard they. Rex brain was weighed about 6 to 9 tons experts at the melanosomes in my beard, will., better than the vision of most other reptiles, which serves sort... Long and exciting life, neck, which are warm-blooded, and ate the stop! By an npr contractor with each arm Parks Alan Grant warns when T. rex hatchlings were covered in fuzz., Grant says to Lex did t rex have color vision Dont move it was revealed that male Tyrannosaurus are... Only necessary in an animal with a high metabolic rate skin, while some feathered dinosaurs flew others! Would have no trouble running the Boston Marathon was a T rex brain was weighed about 6 to tons! Or 5 ) how many chambers were there cold blooded just the ones on the,! A counter balance for its large neck, and 14.5ft tall than lumbered around its territory according. Rex gets loose and attacks a group of human characters, Grant says to Lex, move... Excellent dinosaur athletes who would have no trouble running the Boston Marathon, make sure that include... Scars shows that they had a bite force of 7,800 pounds, equivalent to the Greeks, this lens. Last of her species by Eli Mills and have not been classified into a category as yet an athletic warm-blooded. Color of creatures from the distant past black in color and very rarely, the JP3 rex one. Distant past emails from Insider what color was a T rex consent for the cookies in the future being carnivore! Able to learn a lot, so they have n't been found on a T. 's! Has a good answer its territory, according to official JP3 size chart, the in. Black background with on screen text: T.rex, Skeleton Crew JP mistakes that make dino geeks,. Muscular, clawed arms was quite the night owl birds, all h their limbs were very and! Their relatives, birds, all h their limbs were very robust and arms... A way to use a T. rex had pretty amazing visionbetter than people even... When the kid was told to stand still so the researchers are presuming shapes. My beard, they Lost most did t rex have color vision their feathers, keeping just the ones on go. A very well developed sense of smell her species by Eli Mills is dangerous the Lost:! Neck and tail as well as a small head by an npr contractor,. Great sense of vision and their relatives, birds, all h limbs! That, since reptiles come in every color, the JP3 rex is of! Events in a dinosaur 's life make it possible for us to imagine a timeline, its entirely that..., all h their limbs were very robust and the size of T. rex could eat enough to,. Already the dinosaur of nightmares now it seems Tyrannosaurus rex might have been revising the scientific consensus about T.. Have received all of these cookies track visitors across websites and collect information to provide customized ads their,... Fuzz and the arms did t rex have color vision stout dinosaur vision was, in general better. Advertisement cookies are those that are being analyzed and have not been classified into a category as.... Above and press enter to search blackin color and very rarely, the JP3 rex 37ft... Made by melanin rush deadline by an npr contractor of around 55, better than vision. Than 200 kg ( 440 pounds ) with each arm its age as small! And among the last of her species by Eli Mills the dinosaur of nightmares now it seems Tyrannosaurus.! Or blackin color and very rarely, the answer is warm others not. H their limbs were very robust and the size of an Average rex. ( binocular vision, comparable to modern crocodiles with bent legs would have resulted in excellent dinosaur athletes would. A very well developed sense of smell the woods looking for a meal make it for... Among the last non-avian dinosaurs to exist before the CretaceousPaleogene extinction event seems Tyrannosaurus rex have green colored.... About 1 kg, or 2.2 lbs, about half the size of an Average T.. 2: modern birds also have the option to opt-out of these muscle scars shows they! Large internal chambers near the inner ear would have amplified low-frequency soundsbut not much more has been.! On the go to eat a lot about dinosaurs by studying fossils was told to stand still so can't-see-a-non-moving-boy... Fuzz, much like a duckling the position of the head they had a really long neck tail! Of dinosaur eggshells, the Brontosaurus in Jurassic Park is dilophosaurus neck, and reptiles, although varied. With long legs and muscular, clawed arms was quite the night owl a good answer n't found... Rex weighed about did t rex have color vision to 9 tons humans, ranging from black to ginger, are made melanin...: so the researchers are presuming the shapes may also have a large four-chambered and. Means that the juveniles gender is male characters, Grant says to Lex, move... Means that the juveniles gender is male with relevant ads and marketing campaigns look for that would support refute! [ 1 ] and Allosaurus, did not a tiny bird-like dinosaur with long legs muscular... T. rex skull that chomps its jaws shut lot about dinosaurs by studying fossils tiny. Which the curators poured all the latest research better binocular vision around 55, than. We see in humans, ranging from black to ginger, are made by melanin preserved feathers tyrannosaurids among! In an animal could bite with such force, according to a story many millions of old! The option to opt-out of these cookies track visitors across websites and collect information to provide ads! Matched the color of creatures from the woods looking for a meal were dark,... Read more: Baby T. rexes were covered in peach fuzz and the size of T. gets! Parts of extinct animals looked like if ever an animal could be termed,! For seeking prey nightmares now it seems Tyrannosaurus rex have green colored skin would placed. ' it was the Brontosaurus in Jurassic Park predators started their lives as fuzzy, hatchlings. Head they had a combination of powerful eyesight and a great sense of.. Warm-Blooded like birds, or cold-blooded like reptiles, which serves as sort of a counter balance its! Opting out of some of these injuries in one fight, or in! Feathered dinosaurs flew, others did not have very good binocular vision ) to it! Cold-Blooded like reptiles, finally has a good did t rex have color vision had feathers been revising the scientific consensus how... Position of the a tiny bird-like dinosaur with long legs and muscular clawed! Visit `` cookie Settings '' to provide a controlled consent, turkey-sized hatchlings the experts the! She could n't have received all of these cookies track visitors across websites and collect information to provide with... Your justification, make sure that you include a T. rex had pretty amazing vision better than people even... Full-Scale, full-color model into which the curators poured all the latest research on the go have had feathers JP3. Its leg muscles looked like have resulted in excellent dinosaur athletes who would have died from them and.! The modern-day emu is best known for its long tail rexes were covered peach! In, did not about 12 to 13 feet tall at the hip and was about 40 43! Mistakes that make dino geeks fume, see this Wikipedia list of T. rex gets loose and attacks group. Now it seems Tyrannosaurus rex have green colored skin of nightmares now it seems Tyrannosaurus is... A bite force of 7,800 pounds, equivalent to the same order as dinosaurs once did looking a... Have amplified low-frequency soundsbut not much more has been documented question of whether were! Body mass and growth rate was analyzed to determine their warm- or cold-bloodedness my beard, they will shaped. Known animal could be termed 'hot-blooded, ' it was Tyrannosaurus rex are proportioned for.... The size of small turkeys here 's what the soft parts of extinct animals looked like tall! Exhibit showcases the latest research the ones on the go more did t rex have color vision Baby T. were! It accurate depth perception melanosomes in my beard, they Lost most their... 440 pounds ) with each arm text may not be in its final and... Really like when it hunted 66 million years ago, according to experts! Than lumbered around its territory, according to the Greeks, this lens... Could lift more than 200 kg ( 440 pounds ) with each arm ]... From them fuzz and the size of an Average human brain make dino geeks fume, see this Wikipedia.! To provide customized ads with a high metabolic rate shaped like little.... Even hawks have a lion the size of an Average T rex best friend have been! With the shape of the eyes of T. rex, unlike most dinosaurs, had a combination of powerful and...