Biomechanics of Tyrannosaurus Rex
Do you remember sitting in the movie theatre as an 8 year old child watching Jurassic Park? The continuous action left your bones chilled and your frail youthful body stuck to the seat. But you couldn’t get enough of this movie because you knew that it was a privilege for you to see a rated R flick. But just when you thought that you could take no more, enormous Tyrannosaurus Rex flooded the screen running after a jeep going at least 50 miles per hour. The problem wasn’t that T-Rex looked fearsome but it was that he outran the jeep. In your mind you wondered how such an extremely large animal could move like the wind but you decided not to question it. As a kid you knew that a T-Rex couldn’t move that swift but just recently the scientific world began to catch on.
Scientists have come to some very valuable conclusions through the study of biomechanics. Biomechanics is the application of the principles of mechanics to living systems, particularly those living systems that have coordinated actions. Unlike claims, dinosaurs can be analyzed through biomechanics because they move systematically. But the question still remains could Tyrannosaurus Rex run as fast as they say? Many people have attempted to answer this question, only few have come to a valid conclusion.
The most famous study on the biomechanics of T-Rex was by Hutchison and Garcia. They discussed whether or not the short-armed T-Rex could run very fast considering its massive size. Through this hypothesis a model was created. The model designed by Hutchinson and Garcia used physics and biological equations to calculate the amount of leg muscle an animal needs to remain balanced during fast running. While running at great speeds an animal pushes against the ground in order to support itself. This also means that the animal exerts force proportional to its weight every time its foot hits the ground. As a result, the ground pushes back upwards on the leg with a vertical force. That vertical force, called a ground reaction force, is about 2.5 times body weight during fast running.
Hutchinson and Garcia's model calculates the ground reaction force along with other necessary factors such as the length of limbs and stance to determine the amount of muscle mass that would be needed to maintain equilibrium.
Truman’s decision to use atomic weapons has long been a controversial subject throughout the decades after he used it. Many scholars and people who surrounded the president at the time published memoirs and books about the decision to use the weapon. As years went, more works of writing and information were released which added more information to the vast knowledge we have of the decision to drop the bomb and of what the Japanese faced after the event took place. J. Samuel Walker wrote a book called Prompt & utter destruction which uses new knowledge gained about the bomb and new information the Japanese released, which Walker said, “has greatly enriched our understanding of the agonizing deliberations in Tokyo over ending the war” (ix).Walker did not take any sides in the book, however, he uses what material from the first book and new sources of information to evaluate why President Truman made his decision. The main focus of Walker’s book is to answer why President Truman used atomic bombs against Japan and open more discussion to the question “was the bomb militarily necessary or was it used primarily for political/diplomatic reasons that had more to do with impressing the Soviets than winning the war against Japan?” (xii), which Walker said the question “divided specialists” (xii).
The atomic policy against Japan was closely related to the fear of Soviet expansion in Asia. U.S. leaders were strongly conscious of Russia’s agreement at Yalta to join the war against Japan three months past Germany’s surrender on May 7, 1945 (Fogelman, 124). Among the U.S. invasion of Japan planned for November 1, 1945, U.S. officials were doubtful about the cooperative mission with Russia in which Russia would have power at the peace table. However, the successful detonation at Alamogordo had transformed everything. The bomb guaranteed that the U.S. no longer required Russian aid to win in the Pacific (Wainstock, 132).
Dinosaurs are often compared to and resemble modern day reptiles. Scientists will study how these modern day reptiles behave, look, act, and move to draw conclusions on how the dinosaurs would behave, look, act, and move. They also look at the intern make-up of the modern reptiles to predict how the dinosaurs internal make up would be. However, a recent discovery in South Dakota is stirring up some controversy (Hesman). While Mike Hammer was walking around a ranch in South Dakota he stumbled across a “big-eyed” dinosaur that he now refers to as Willo. The thing that caught his eye was the chest cavity of the dinosaur, upon further investigation he found a rock that was preserved in the curve of the dinosaur’s ribs, he was convinced that this rock was once a heart. Hammer then went on to take the dinosaur fossil in for a medical X-ray scan, this X-ray showed evidence that could change how we think about dinosaurs.
In conclusion, the recent study published by John R. Hutchinson and Mariano Garcia entitled Tyrannosaurus was not a fast runner, if it is true, has shattered what we have come to understand about Tyrannosaurus Rex. T-Rex was not a fast runner as popular movies have suggested, because it didn’t have the amount of extensor muscle needed to support itself for such activities. Maybe, sometime, another study will come along that counteracts this new study, but until then it appears that we have been wrong about T-Rex.
O'Neal, Michael. President Truman and the Atomic Bomb: Opposing Viewpoints. San Diego, Calif.: Greenhaven Press, 1990. Print.
At a time, scientists believed all dinosaurs were cold-blooded. However, with a recent discovery of a dinosaur found with a fossilized heart in the northern part of South Dakota in 1993, many paleontologists are starting to think that there were some dinosaurs that were warm blooded.
Holden is like most teenagers: he’s trying to find his place in society without having any sort of direction. One of the main reasons this is hard for Holden is because he doesn’t have any role models and is misguided. His brother D.B. lives all the way in Hollywood “being a prostitute” (Salinger 2) and he resents his parents. Everyone around him seems to be “phonies “and Holden is continuously trying to be different but notices that the lifestyle he wants just doesn’t fit in the world he lives in . He constantly rejects certain ways of living but can’t seem to find the purpose for his own and because of this he criticizes the life of the...
... of classifying what qualifies an I/O psychologist and the dual role I/O psychologists can operate in within their field. A qualified I/O psychologist by definition stretched to consider doctoral psychologist as well as degrees held from a school of business, or administrative science. Qualified I/O psychologists must possess a strong knowledge of research and scientific methods. Also, the programs must be founded from an accredited psychological program or university (“Specialty Guidelines”, 1981, p. 665). Throughout reading the multiple articles an important point to call attention to is the inclusion of multiple other forms of degrees which can be considered as a prime factor of I/O psychology’s complexities. Speaking to the multi-layered discipline, the struggle of boundaries between the Industrial side and the Organizational side has yet to be perfectly found.
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.
We use dinosaurs to represent the changes in nature that have occurred throughout time. Studies found that although the “oldest rock did not show evidence of life, the progression of plant and animal life that changed in recognizable intervals, from ancient life, age of reptiles to the age of mammals” (Dino Nature Metaphor, slide 6), measured the age of the earth. When we think of dinosaurs in relation to nature, we think of that very powerful force that controls the cycle of life. Nature was able to yield such magnificent ferocious creatures that walked the earth and then take them back when they served nature’s purpose. Dinosaurs fit perfectly in nature’s constant
...ll. This group still remained successful during the Jurassic period and had a wide geopraphic distribution. Other reptiles evolved to not only live on land, but to fly. The earliest known birds appeared during this period; Archaeoteryx being the first to be considered the intermediate between the birds and predatory dinosaurs. It is debated on whether this ancient bird could actually fly or merely glid from tree to tree. Carnosaurus, meaning “meat-eating” is another group of dinosaurs that ruled during the Jurassic. With such large herbivorous prey animals, the correlation of these large predators make sense of why they were so common. An Allosaurus was one of the most common Carnosaurs in North America. Upon finding numerous intact skeletons in fossil beds, it has been reported that the Allosaurus was superficially similar to the later evolving Tyrannosaurus rex.
The Revisionists and the orthodox views are different opinions on President Truman’s decision to use the atomic bomb. The revisionists believed that Truman’s decision was wrong and there could have been alternatives. They say that the Bomb was unnecessary and it was only used as a “diplomatic tool” and to show the power of th...
Although Holden can be described as a realistic, cynical teenager, he can also be categorized as straightforward. This is one of Holden’s strengths, he sees the truth for what it really is, not how he wants it to be. For example, Holden describes his old school, Pencey Prep, saying, “I didn’t know anyone there that was splendid and clear-thinking at all.” (Salinger 3) Pencey Prep had claimed that they had the capability to “mold” young men, but Holden could see right through it. Holden’s straightforward characteristic also leads him to be independent and self-reliant, which are also Holden’s strengths.
A group of scientists from North Carolina and Oregon used medical technology to search an iron-stained concretion inside the specimen’s chest. With the assistance of imaging equipment and software, they were able to reconstruct 3-dimensional structures through the interior of the concretion. The images reveal a heart that was more like that of a bird or a mammal than those of reptiles, significantly adding to evidence suggesting that at least some dinosaurs had high metabolic rates. In addition, the heart appears to have been four chambered with a single aorta, which is most commonly found in mammals or birds.
In the third instalment of Jurassic Park, was a real swing and miss when it came to knocking it out of the ball park. With no spectacular or miraculous happenings to make the film truly stand out. The only contending players worthy of keeping a look out for being the Velociraptor’s, who were the films saving grace and true MVP’s.