Tyrannosaurus Rex
The name says it all. This group of huge carnivores ruled the land during the Cretaceous period. Short but deep jaws, long hind limbs (legs), beady eyes, a long muscular tail, and tiny forelimbs (arms) make up a tyrannosaur. The Tyrannosauridae included such similar animals as Albertosaurus, Gorgosaurus, Daspletosaurus, Tarbosaurus, and of course Tyrannosaurus Rex. A tremendous skeleton of Rex now stands guard in the Valley Life Sciences Building in Washington. Tyrannosaurs belong to the Saurischia, or "reptile-hipped" dinosaurs. Within the Saurischia, tyrannosaurs belong to the group of carnivorous dinosaurs known as theropods. Traditionally, the tyrannosaurs have been included within the Carnosauria. In this classification scheme, carnosaurs represent the largest carnivorous animals to ever walk the land.
Since tyrannosaurs were so huge, you might ask how they could move all that weight around and hunt prey? In the modern dinosaur movie Jurassic Park, T.Rex is depicted moving extremely quickly, maybe 50 or 60 mph! Is this correct? Recently, scientists studied Jurassic Park to calculate the actual speed (using the length of the dinosaur's strides) of T. Rex in the movie. They found that it was actually moving at a walking speed of about 12-mph (the jeep in the movie was supposed to be moving at about 40mph)! Many scientists familiar with the
principles of biomechanics (physics applied to living organisms) think that tyrannosaurs could move fairly fast, maybe 10-20 mph, but not as fast as the smaller theropod dinosaurs. Smaller tyrannosaurs like Albertosaurus may have moved faster than the bigger ones like T. Rex. Some think that this was probably true for young tyrannosaurs, too. Yet, we still lack conc...
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... prey was a most likely weak or slow member of a herd. It is widely believed that some carnosaurs hunted in packs. In this fashion it was possible for smaller carnosaurs to attack and kill much larger dinosaurs such as the enormous plant-eating sauropods.
Now you can more fully understand what a Tyrannosaurus Rex might have looked and acted like during this interesting period in time. Still to this day, Tyrannosaurus Rex is the largest and most feared dinosaur to ever walk the earth. Many scientists and paleontologists have spent their lives trying to figure out the story behind dinosaurs and more explicitly Tyrannosaurs Rex.
Bibliography:
1. http://www.DinoNet/T-Rex/search.com
2. http://www.Dinosaurs.com
3. http://www.TyranosaurusRex/habbitat/search.com
4. http://www.Fossoles/T-Rex/search.com
5. http://www.dinosite/t-rex/land/eating/preditors/.com
...silophodon, a small, agile bipedal herbivore. The Ceratopsians appeared at beginning of cretaceous period from the family Ornithopoda. Pachycephalosaurs contained a ten inch thick skull, which was actually fairly fragile, and their first line of self defense would be to run away. Ceratopsians, which mean horned face, are large beasts with horns that can defend themselves pretty well. Both were very similar, but contained distinct differences.
...ories of why dinosaurs went extinct abound, and as there is no theory yet to be truly confirmed as the “right one”, my theory of dinosaur cannibalism is also purely anecdotal. The discovery of the cannibalistic Majungatholus atopus in Madagascar is an important scientific find because it confirms a long-standing theory of cannibalism among certain carnivorous dinosaurs. Behavioral patterns of extinct animals are difficult to establish; however, these bones give authentication to previous unfounded beliefs about the ancient feeding practices of some dinosaurs.
Now here is some background information on the dinosaur that is causing this stir because of its heart. The dinosaur is a Thescelosaurus, which means wonderful lizard. The average length of the Thescelosaurus is three to four meters, nine to twelve feet, long with an average weight of three-hundred kilograms, or about six hundred and sixty two pounds. They lived from the Campanian age to Maastrichtian age which are the later stages of the Cretaceous period. Another distinguishing physical feature of Willo is the bird-hips that the dinosaur has instead of the lizard hip. They have primarily been found in Alberta, Saskatchewan, Colorado, Montana, South Dakota, and Wyoming. As far as their remains are concerned there is one complete skeleton, eight partial skeletons, elements, and teeth (Dinosauricon).
The article Tyrannosaurus Rex was a Slowpoke by John Roach relieves us of our fears when it states that, “the Cretaceous landscape was filled with large, lumbering creatures that any human with a fast car or bike or maybe even a quick sprint could outpace” (Roach). He tells us that T-Rex, “did not have the leg strength to run very fast, if at all, according to a computer model developed by two experts in the mechanical movements of living creatures,” and, “bring the discipline of biomechanics to the long and at times contentious debate over just how fast the largest of the largest creatures ever to roam Earth could run.”
Dinosaurs were first believed to be cold-blooded because they were thought to be related closely to reptiles which are cold-blooded creatures. Cold-blooded animals don’t actually have “cold” blood, instead they rely on the temperature from their environment to regulate their own body temperature. They do this by taking advantage of external heat by basking in the sun, and by lying in the shade to cool down. A more correct term is “ectothermic” which means “heat from outside.” On the other hand, a warm-blooded animal creates heat internally by chemical reactions inside their body. They are able to regulate their body temperature internally instead of relying on their environment. Author of the article, “Dinosaurs: Warm or Cold Blooded?” Beverly Eschberger explains, “endothermic animals have a continually high requirement for food to fuel the heat generation. Providing they can find food their constantly-optimum body temperature means that they can stay active even when it is very cold” (par 3). Even though it was believed that dinosaurs were closely related to cold-blooded reptiles, most dinosaurs had similar behaviors of a bird which is a warm blooded animal. Believing dinosaurs were warm blooded would help explain the reason why dinosaurs were so dominant and plentiful for such a long period of time. There are many other factors that play a vital role in ...
Because dinosaurs are animals that lived millions of years ago, we are entirely dependent on the fossils that they have left behind for any understanding that we hope to gain. As any paleontologist will tell you, fossil hunting is difficult. There are no certainties, no guarantees. A certain amount of luck is as valuable as any scientific knowledge.
Many people once believed that pterosaurs were weak flyers, or at least the larger ones were. The idea was that they used their large wings to glide instead of flap like flying creatures. This is now known to be false. Pterosaurs were also thought to be dinosaurs with similar anatomical features. Studies have shown now though that since the pterosaurs were not flappers but active flyers, their hearts were similar to those of mammals with four chambers, needed for an active way of life, unlike reptiles. In the past century, pterosaurs fossils have been known to be found with fur, which leads scientists to believe that pterosaurs needed insulation to keep in heat which indicated pterosaurs were active like mammals and warm blooded. 1
The Jurassic environment that Updike constructs in his short tale invites interpretation. First, the majority of the dinosaurs described were found, as one would expect, in the middle to late Jurassic period. By the Cretaceous period, the era that followed the Jurassic, these species had largely faded into obscurity, replaced by huge sauropods. Indeed, the only species in Updike's tale that falls into this class of Cretaceous sauropods are the brontosaurus and the diplodocus, both of which are held in high regard by the narrator. One can clearly infer from this evidence that, though Updike titles hi...
Dinosaurs are an extinct group of animals that thrived for 165 million years starting 230 million years ago in the Late Triassic period of the Mesozoic Era. Despite being extinct for the past 65 million years and not being able to study them in their true form, scientists have been able to estimate many different behaviors of dinosaurs. This paper will show that the close study and examination of different types of body and trace fossils, along with animal models, can be provided as evidence to estimate different types of behaviors in dinosaurs. The different types of behaviors examined below will fall into the categories of: mating; reproduction and nesting; social lives; locomotion; feeding; and fighting. To begin, a great deal of information gathered from fossils and compared to living animal models have been used to estimate mating behaviors.
Dinosaurs held their own, according to studies, for at least 150 million years. After becoming extinct and finding fossilized remains dinosaurs have become a way in which we not only measure the changes that have occurred as the planet evolved, but also how we express ourselves today.
The dinosaurs were brought to life using ground breaking CGI by the “wizards” at Industrial Light & Magic and life-size animatronics by Stan Winston. Each frame the digital dinosaurs were in would take hours to render but the results speak for themselves. Stan’s team created animatronics for several of the film’s main dinosaurs. The T-Rex animatronic alone stood 20 feet tall and weighed 17,500 pounds (Jurassic Park (film), 1993). Animatronics were also created for the film’s triceratops, velociraptors and dilophosaurus. To give the dinosaurs their voice, samples from around the animal kingdom were combined to create unique blending of sounds for all the main dinosaurs. To make sure the audience would hear the dinosaurs as he intended, Steven Spielberg invested in the creation of a new company dedicated to digital surround formats called DTS. This brought digital sound into theatres in a way like never before. All of these innovations earned the film three Oscars for best sound, best sound effect editing and best visual effects.
The Triceratops were very interesting dinosaurs. They were very smart and strategic. They moved in herds and used mating calls. They were very complex. They had an interesting body shape that gave them an advantage towards their predators. They were known for their horns and parrot-like beaks. They were herbivores that lived in North America. Triceratopses were very interesting.
Crocodiles today are adapted to both land and water. These animals have land movements that are only found in mammals. They perform asymmetrical gaits, such as bounding and galloping. These movements are thought to have evolved from the Triassic era. Ancestors had a larger role on land, and a more upright posture. A bracing system has been proposed, which limits vertebral loads. This bracing system in crocodiles today allows for both up-down and side to side movements. Changes in the bracing system are thought to be why crocodiles have switched from amphicoelous to procoelous. It is also the reason why body size is linked to movement.
A conflict that my main character is dealing with are the dinosaurs. The reason the dinosaurs are the biggest conflict because they are in all the problems. The first in counter with them was liven and his guide. What happened was that they where going through the woods and they were attacked by velociraptor. The last encounter was with the t-rexs. The reason the t-rexs attacked them was that they took one of their baby because it had a broken leg. This is why the dinosaurs are my main conflict in my book.
Reptiles are vertebrate, or backboned animals constituting the class Reptilia and are characterized by a combination of features, none of which alone could separate all reptiles from all other animals.The characteristics of reptiles are numerous, therefore can not be explained in great detail in this report. In no special order, the characteristics of reptiles are: cold-bloodedness; the presence of lungs; direct development, without larval forms as in amphibians; a dry skin with scales but not feathers or hair; an amniote egg; internal fertilization; a three or four-chambered heart; two aortic arches (blood vessels) carrying blood from the heart to the body, unlike mammals and birds that only have one; a metanephric kidney; twelve pairs of cranial nerves; and skeletal features such as limbs with usually five clawed fingers or toes, at least two spinal bones associated with the pelvis, a single ball-and-socket connection at the head-neck joint instead of two, as in advanced amphibians and mammals, and an incomplete or complete partition along the roof of the mouth, separating the food and air passageways so that breathing can continue while food is being chewed. These and other traditional defining characteristics of reptiles have been subjected to considerable modification in recent times. The extinct flying reptiles, called pterosaurs or pterodactyls, are now thought to have been warm-blooded and covered with hair. Also, the dinosaurs are also now considered by many authorities to have been warm-blooded. The earliest known bird, archaeopteryx, is now regarded by many to have been a small dinosaur, despite its covering of feathers The extinct ancestors of the mammals, the therapsids, or mammallike reptiles, are also believed to have been warm-blooded and haired.