Tyrannosaur Social Behavior

The elongated arm bones that support the wing evolved in the first coelurosaur, which probably looked like ornitholestes. As far as we know feathers are unique to birds, but this doesn’t mean that birds are not dinosaurs. Because birds belong to the group called dinosaurs, it follows that birds are feathered dinosaurs. The closest known evolutionary relatives of birds are some of the small carnivorous dinosaurs, such as velociraptor, ornitholestes, and deinonychus. The difference between a Tyrannosaurus Rex and Apatosaurus is that almost everything about Tyrannosaurus Rex indicates enormous power of one of the largest theropod dinosaurs that ever existed. They have a 4-foot-long jaw, 6-inch-long teeth and massive thighbones. It is the largest and most fearsome carnivore of all time. The fossil was originally arranged so that the dinosaur stood

“He returned, shuddering, five minutes later, his arms soaked and red to the elbows”. This is Eckels. But he’s not always covered in blood. He is a brave and fearless hunter. Or at least that's what he wants us to think. In the short story “A Sound of Thunder” by Ray Bradbury, Eckels is a hunter that travels back in time to hunt a dinosaur. More specifically, a T-Rex. Though Eckels is a skilled hunter of normal animals, he is insecure because he is trying to disguise his terror and anxiety by attempting to look like a tough and courageous hunter.

While a theropod “beast-footed” carnivore includes the T. Rex, the ones that likely roamed Wrangel-St.Elias National Park were considerably smaller. The researchers found evidence of a single theropod that was likely a tiny 9 cm long and 7 cm wide due to an impression of the sinusoidal shape. Several ornithopod, medium and large plant-eating dinosaurs, was identified by blunt and rounded digit impressions which are usually 22 cm long and 26 wide. It was the first evidence that dinosaurs roamed this vast region.

Velociraptor, like other dromaeosaurids, had a large manus ('hand') with three strongly curved claws, which were similar in construction and flexibility to the wing bones of modern birds. The second digit was the longest of the three digits present, while the first was shortest. The structure of the carpal (wrist) bones prevented pronation of the wrist and forced the 'hands' to be held with the palmar surface facing inwards (medially), not downwards.[5] The first digit of the foot, as in other theropods, was a small dewclaw. However, whereas most theropods had feet with three digits contacting the ground, dromaeosaurids like Velociraptor walked on only their third and fourth digits. The second digit, for which Velociraptor is most famous, was highly modified and held retracted off the ground. It bore a relatively large, sickle-shaped claw, typical of dromaeosaurid and troodontid dinosaurs. This enlarged

The hardest parts of the body are the teeth. They give you a clue on an animal’s diet. Also, they are a good window on how different ways of feeding came about. In older rocks, at the same base, scientists find reptiles that look dog- like. The creatures that walked on the four legs had big skulls and sharp teeth. These reptiles had jaws of many bones. The higher in the rocks are, the

Certain types of large snakes, in particular boas and pythons, and cetaceans, whales and dolphins, are shown to have homologous hip bones, a pelvis and femur. These bones have previously been considered vestigial--organ or body part which became redundant through the course of evolution--, but upon further research, have shown to serve a purpose.

In the article “Skin Pathology in the Cretaceous: Evidence for Probable Failed Predation in a Dinosaur” written by Brice M. Rothschild and Robert Depalma, they report their findings on the observation of the skin of a duck billed dinosaur regarding its’ scaled pattern and forming of scar tissue (Rothschild and Depalma 2013). Rothschild and Depalma introduce the issue of dinosaur skin pathology through the finding of damaged dinosaur skin through Lingham-Soliar ‘s (2008) report on the damaged skin and bite impression of the Psittacosaurus skin, which did not heal from the bite; indicating that the Psittacosaurus had died from either a scavenger or a predator (Rothschild and Depalma 2013). However Rothschild and Depalma (2013) focus their research

For example, by the teeth, carnivores have sharp incisors and canines that are designed to tear apart flesh and muscle. we could determine if the animal ate meat or leafy vegetation, further determining if it acted as a predator or prey. 5. How do carnivore and primate skulls differ?

Dinosaurs come in many different colors and sizes. The lifespan of a dinosaur is 75 to 300 years. Their daily life is hunting, mating, using the bathroom, and migrating. The defense mechanisms helped them repair their injuries 150 mya. The bone structures are the skull, jaws, neck bones, vertebrae, thigh, pelvis, tail, and rib bone. Dinosaur’s average speed is about 27 mph. Dinosaurs find their food by hunting, which is each other and some eat plants. They reproduce by hatching newborns from eggs. Some communicate by their horns or flickering the tip of their tails. Baryonyx stomach contents were found to contain fish scales, is an example of predator-prey relationship. Some animals that are related to dinosaurs are lizards, because of their skin texture.

I decided to become a problem engineer to get a living and be in the area generally with many fossils. I decided to go onto the engineering side of the campus. It was all going to change for the best. T-rex DNA was discovered to of been preserved in the tyrannosaurus femur. I read the paper. It was thought to of been decaying bacteria. Even with much of the scientific community discrediting the paper my imagination when wild. It wasn’t amber like in Jurassic Park but, my inner child was awoken. Just the idea of preserved dinosaur DNA preserved somewhere sent excitement to my mind. Amazing being surrounded by Dinosaurs. Real Animals not just movie monsters from my early childhood. Many of my family members have questioned me on by blind stupidity towards dinosaurs. They remind me what happens at the end of the Jurassic Park movies. All I will reply within a sarcastic tone, “Death by Dinosaur. How many can put that on their tome stone.” Three years later they proved that the tyrannosaurus rex cells trapped inside and preserved by the high iron consideration of blood settling inside of the leg were real. I am still chittering with excitement about the possible end

First, Crichton noted that duckbilled dinosaurs were herbivores which are supported by a trace fossil found in the coal beds of the western North America that indicated footprints with plant fossils (Martin 2006). Furthermore, duckbilled dinosaurs lived in a vegetated environment that they had to consume enough food relative to their body size. Duckbilled dinosaurs had lengthened their skull and smoothed snout to obtain and process more food. The Dilophosaurus was described as two curved crests that extended from the eyes to the nose. The crest created a V shape on the head with red and black stripes on the crests (Crichton, 1990). Based on fossil evidence, the Dilophosaurus had two crests on the head, but there was no indication of the pigment of the crest. Next, the book stated that the T. rex does not bite the prey, instead, it twisted and tore the

The robust australopithecines or paranthropines had a curved face with a arch for the cheek bones that are formed by connecting the zygomatic and the temporal bones together. The robust australopithecines had a bone ridge on top of their skull called a sagittal crest, which is also attached to the jaw muscles. They had a flexable base just above were their jaw bone connected to their cheek bone. With their really large back teeth (below the cheek bone) the robust australopithecines fossils were known to the researchers as the “nutcracker man”. They used these really large back teeth to eat tough foods and nuts. And their teeth in the front were smaller.

Amphibians skin is moist and they do not consist of scales. The skin of an amphibian is also permeable. Permeable means that gases can pass through their skin. A reptiles’ scales provide them with a protective layer of skin that is tough and dry. The scales help to minimize the loss of body moisture, the reptilian scales consists of a protein called keratin. The scale structure of a reptile are not individual like those of a fish, but are a continuous sheet of epidermal tissue. Hard-shelled eggs provide a protective environment in which the embryo can develop and enables reptiles to lay their eggs in dry environments. On the other hand, amphibians must lay their eggs in or near water. The reptilian skeleton differs from other vertebrates in many ways. For example, reptiles have many bones in their lower jaw to enable them a greater bite mobility, but mammals only have one bone in their lower jaw called the mandible. Mammals ears consist of three bones(the malleus, incus, and stapes) while reptiles have just one bone(stapes). Reptiles also have only one occipital condyle(a protrusion on the skull that forms a joint that enables movement of the head) mammals on the other hand consist of two occipital condyles (Laura Klappenbach 2014).

The Discovery of the “new” T-Rex occurred during the blistering heat of a Ganzhou summer by a construction worker in the city. Obviously, it was not a paleontological expedition but it quickly turned into one after the worker’s backhoe slammed into a rock-hard barrier. Though the man likely assumed it would be a major inconvenience for his job (such as bedrock or pipes), but he was in for quite the surprise. Amidst the dusty, dirty air, the skeletal remains of a new species of Tyrannosaurus Rex lay idly by- just waiting to be discovered. That is right, the Qianzhousaurus Sinensis, in all the glory of its long snout, was revealed completely by accident.

Millions of years ago a dinosaur group, theropods, consisted of killing-machines like the T-Rex and the velociraptor, but recent research has proven that these bloodthirsty carnivores evolved into birds, trading their sharp teeth for beaks. This mind-blowing realization has confused many people for years, but Amy Balanoff reported her findings to show proof of the line of evolutionary descent from horrendous beast to feathery pet.