Surface area to body mass ratio plays a central role in determining an organism’s ability to generate and retain body heat. How might this have played a role in dinosaur evolution, and what are the specific advantages of being large and slow versus small and fast with respect to heat generation and retention?
We know today that majority of the species of dinosaurs grew of massive sizes. Dinosaurs were reptiles and hence cold-blooded. In order for reptiles to function properly, they need to bathe properly in the sun in order for their muscles to gain enough heat to be able to contract and relax for proper functionality [1]. This is especially more observable in reptiles near and around Polar Regions. Now, as a general rule, the more surface
“This is my lab and what we do is study bones,” states Kari Bruwelheide in her video entitled “30,000 Skeletons”. Of the three resources that we were provided, “Puzzles of the Chesapeake” by Sally Walker, “Forensic Anthropology” by an unknown author, and “30,000 Skeletons” by Smithsonian Education presented by Kari Bruwelheide, the resource “30,000 Skeletons” is by far the best at explaining the role of an anthropologist. It is unbeatable because it is a video rather than just written words, and Kari Bruwelheide has personal experience in being a forensic anthropologist. A forensic anthropologist is a scientist that studies human remains, or in another word, skeletons, to try to find out information about the past.
Ceratopsians and Pachycephalosaurs are closely related in their characteristics. Ceratopsians processed a saddle-shaped boney frill that extended from the skull to the neck and typically had horns over the nose and eyes. The most popular was the triceratops, which could reach over 26 feet and weigh in excess of twelve metric tons. Their frills served as two major functions. It protected the vulnerable neck from being harmed. The second major function that the frill provided was due to the fact that the frill contained a network of blood vessels on its underside, which were used as a means to get rid of excess heat. The Pachycephalosaurs were considered to be bipedal. They were also found to have thick skulls, flattened bodies, and tail that were covered in an array of body rods. Pachycephalosaurs were thought to have been more than fifteen feet long and processed a skull that was surrounded by a rounded dome of solid bone. It was thought that they used their heads in combat or mating contests, but that was disproved fairly recently, which I will discuss later in the paper. Both Ceratopsians and Pachycephalosaurs were “bird-hipped” and both of these suborders contained a backwards pubic bone. Both were Marginocephilia, or “fringed heads”, which is one of three clads under the Orinthiscia order. They were also herbivore dinosaurs that inherited their fringe at the back of the skull from earlier ancestors.(2) Their classi...
One hundred and fifty million years ago, large aquatic species of reptile such as the Plesiosaur dominated the ocean, and were pre-eminent predators of the sea. The branch of now extinct Plesiosaurs, or ‘near lizards’, evolved into variant closely related species specialised to take different niches in the food chain. Such species of Plesiosaur include the phenotypically similar Plesiosauroid and Pliosauroid. The physiological adaptations of the long necked variant, the Plesiosauroid, as it relates to deep sea diving, will be addressed in depth.
A man dies. He winds his way down into the underworld to reach the banks of the river Acheron where he meets the ferryman Charon. He takes a coin from his mouth to pay the toll across. On the opposite bank he is greeted by a Maenad or perhaps Bacchus himself who offers him a kylix of wine. Drinking deep, the man is transformed and resurrected from death to a higher plane. Instead of living a miserable dream in the underworld he receives redemption from his god Dionysos, the Savior. In Roman imperial times there was a great resurgence of the "Mystery" cults of Greece fueled by the hope of a life after death. In funerary monuments there can be seen the tenets of the religion as well as how it views the afterlife. Within the Los Angeles County Art Museum stands such a vessel created to facilitate this journey to eternal bliss.
Hutchinson, John R., Garcia, Mariano “Tyrannosaurus was not a fast runner.” Nature 28 Feb 2002: 1018-1021
7.) M. J. Benton, V. P. Tverdokhlebov , M. V. Surkov (2004), Ecosystem remodelling among vertebrates at the Permian–Triassic boundary in Russia),Nature 432, 97-100, doi:10.1038/nature02950
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.
Jurassic Park is a science fiction novel written by Michael Crichton which was published in 1990. The book follows a mysterious island that is inhabited by genetically engineered dinosaurs created by a bioengineering firm. The story lets us watch as visitors land on the island at the request of the rich billionaire who owns the island and the bioengineering firm, which is named InGen to revel in the wonder that they have created. We follow all the miss-steps until all is lost and the island has to be destroyed. The novel is one to give us insight into what can happen when we try to play god and foreshadows what possibly could go wrong by taking that next step into genetics that could be considered reckless and dangerous. Crichton lets us in on an evolutionary tale that questions biological genetic advancements and what cost come along with possibly stepping over the moral line of right or wrong. The genetic engineered dinosaurs in Jurassic Park are dangerous and are an ill-advised step into the evolutionary development of our planet. Crichton lets us in on an evolutionary tale that questions biological genetic advancements and what cost come along with possibly stepping over the moral line of right or wrong and how we use knowledge and technology to continue to move forward.
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 debate of whether dinosaurs were cold blooded or warm blooded has been ongoing since the beginning of the century. At the turn of the century scientists believed that dinosaurs had long limbs and were fairly slim, supporting the idea of a cold blooded reptile. Recently, however, the bone structure, number or predators to prey, and limb position have suggested a warm blooded species. In addition, the recent discovery of a fossilized dinosaur heart has supported the idea that dinosaurs were a warm blooded species. In this essay, I am going to give supporting evidence of dinosaurs being both warm and cold blooded. I will provide background information on the dinosaur that was discovered and what information it provides scientists.
...r optimum temperatures, hot climate caused the dinosaurs to heat up beyond their optimum. However, the heat didn’t kill them, but sterilized the males, because their testes functioned at certain temperatures. Gould argues that this theory is untestable, and the experiments with the influence of extreme temperatures on modern alligators do not necessarily explain the extinction of dinosaurs. Furthermore, many questions are not answered because of the absence of evidence. Gould states that this theory is another example of bad science.
As time goes on, more and more fossil record of dinosaurs are richly known; more and more relative research project work on. An encouraging imagination that species of dinosaurs are not extinct and they evolve to birds was emerged. Dinosaurs are still here. They are still all around in the Human Age. It sounds crazy. Nevertheless, it seems clues are everywhere. There is a kind of dinosaurs, call Sauroposeidon, could raise its massive head over eighteen meters into the air, but this was only possible because their neck bones were so light, almost 85% hollow (name). Like Sauroposeidon, other kinds of dinosaurs’ bones were honeycombed with empty spaces. In fact, everybody already knows that birds have hollow bones as well, and a lot of people believe that’s an adaptation for flight. Scientists learned that birds inherited their hollow light bones from their extinct ancestors, gigantic dinosaurs. And there is another clue. (name)The lungs of dinosaurs are designed like normal birds, which can be seen all around world every day. Focusing on the respiratory syst...
Dinosaurs are creatures that seem to fascinate humans, since all we have left are their fossils. Although, through art, their bodies can be put back together and we have a better sense of what they looked like. The problem with art is that pictures can sometimes be disproportionate, unrealistic, or even made up. Young children who learn about dinosaurs may think that they are actually different colors and can talk for example. This is why it is important to make dinosaur art as realistic as possible and more informative.
Norell, Mark, Lowell Dingus, and Eugene S. Gaffney. "Why Did Nonavian Dinosaurs Become Extinct?" Discovering Dinosaurs: Evolution, Extinction, and the Lessons of Prehistory. Berkeley: U of California, 1995. N. pag. Print.