Skeletal. Behavioral. Behavioral. Behavioral. Behavioral. Brain. Initially these three claims in the text, "Shedding Light on the Dinosaur-Bird Connection," show how birds are so much more similar to dinosaurs than other animals. Initially, the first claim the authors make in the excerpt,"Shedding Light on the Dinosaur-Bird Connection" is the fact that the skeletal evidence of birds shows so much similarity to the dinosaur. As the authors remark,"[t]hey both have a hole in the hipbone, a feature that distinguishes most dinosaurs from all other animals." This evidence shows the similar features of the hipbone in both animals. Remaining on topic, the authors provide sufficient evidence by stipulating pictures of dinosaurs and birds. Additionally, …show more content…
However, these animals both built nests, laid eggs, and also brooded. As the authors state,"they see evidence of behaviors that are common to living birds, such as nest-building, egg-laying, and brooding." Therefore, these traits are very comparable. These traits show how equivalent these animals really are. Staying on topic, these two animals compare so much by the way the dinosaurs acted before going extinct and by the way the birds act nowadays. However, the authors include abundant amounts of evidence and pictures to show how the fossils, nesting, and brooding from both animals were so alike. Moreover, the two animals had other things in common, such as brain evidence. Finally, in the text,"Shedding Light on the Dinosaur-Bird Connection" the authors explain how similar the brains of these two animals are. However, the authors state,"In a recent study researchers were able to peer inside the brain cases of more than two dozen specimens, including birds and closely related non-bird dinosaurs." This evidence shows the machine they have is able to look at the brains of these two animals to know the possible
Ceratopsians and Pachycephalosaurs Around 144 million years ago, began the emergence of the Ornithischian dinosaurs during the Cretaceous period and diversified into North America and Asia. Ornithischians were classified as having a hip structure similar to that of birds, although they are not the descendants of birds. Marginocephalians, meaning "fringed heads" are a group of Ornithischians that have a distinctive skull structure, consisting of a slight shelf or bony frill on the back of the skull, a unique palate, and a short hip structure. These herbivores include two major groups: the Ceratopsians and the Pachcephalosaurians. These plant-eaters include the Ceratopsians, horned dinosaurs such as the Triceratops, Styrachosaurus, Pentaceratops, and the Protoceratops.
Paul, Gregory S. (2002). "Looking for the True Bird Ancestor". Dinosaurs of the Air: The Evolution and Loss of Flight in Dinosaurs and Birds. Baltimore: Johns Hopkins University Press. pp. 171–224. ISBN 0-8018-6763-0.
The female moves her head within the avenue walls during the male display, providing her with motion parallax depth cues that will conflict with the false depth cues of forced perspective.
Of course it was the movie Jurassic Park who seemed to coin the phrase “Dino DNA.” This movie gave the public the thought that, a) it is possible to find dinosaur DNA and b) we can clone dinosaurs from this DNA. This essay is not going to pick apart Jurassic Park’s scientific value, however it will share the current knowledge and information on dinosaur DNA. The discovery of DNA is important because it may uncover different bits of information. The idea of cloning dinosaurs, especially at this point is out of the question. It is really hard to clone living animals today, with full DNA and genome strands, we can’t even think about recreating animals millions of years ago.
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
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.
Marzluff, J., Angell, T. & Elliot, B. (2013, May. - Jun.). Birds: Brains over brawn. Audubon, 115(3), 40-41.
Pterodactyls are not considered dinosaurs, they were flying reptiles that lived at the time of the dinosaurs but by definition do not fall into the same category. The same goes for water based reptiles such as the Plesiosaurs. Some scientists believe that they are not extinct since their descendants, the birds, are still alive today. The color of dinosaurs is unknown because no one was alive at their time to witness or see the dinosaurs in action. You would think it would be logical to divide dinosaurs into herbivores (plant eaters) and carnivores (meat eaters), but paleontologists see things differently, they distinguish dinosaurs between Saurischian (lizard-hipped) and ornithischian (bird-hipped) dinosaurs. Saurischian dinosaurs include carnivorous theropods and herbivorous sauropods, while ornithischians account for the remainder of plant eaters, including hadrosaurs, ornithopods, and ceratopsians, among other dinosaur types. Oddly enough, birds evolved from “lizard-hipped”, rather than “bird-hipped”
...pdated 1995, accessed 3 Sept. 2000), Dino Buzz – What killed The Dinosaurs ? – Current Arguments,
Microscopic analysis has shown that the bones of some dinosaurs grew at a rate comparable to the modern mammals and have many more features in common with them. -Some researchers had studied
Are birds really dinosaurs or are they simply related? That is a question that has gained new life in recent years due to the overwhelming facts the are pouring in from newly found fossils and studies from fossils that have been found in the past. Two groups have formed in the study of this question: those who believe birds are a direct result of dinosaurs and those who feel dinosaurs and birds must have had a common ancestor. Determining which view is correct is a matter of opinion based on fact. The main problem involves the use of cladistics or phylogenetic systematics to group organisms according to characteristics they share. When one looks at dinosaur fossils, he or she may feel that certain characteristics are used for something entirely different than someone else who has looked at the same fossil.
Humanity finds itself, at one time or another, struggling with fear, chaos, and hope. In the song called “Black Bird” by Lennon McCartney, the black bird represents having hope in the midst of hard times. By visually analyzing Women with Raven (1904) by Pablo Picasso, the observer is able to compare the woman and the raven and see their physical similarities. In “The Birds” by Daphne du Maurier, the birds are portrayed as war-like destroyers. By critically analyzing the symbols, language, and nature of these texts, the universal human significance of birds is conveyed: birds are generally war-like and evil in nature and only in certain circumstances portrayed as comforting and hopeful.
In the study, the best print was used for comparative data to determine the degree of similarity to a small theropod and ornithopod. For most aspects the print obtained ratios closest to the theropod data, except for the total divarication of digits II-IV being larger than expected. However, this was explained by the dinosaur’s toes spreading slightly when the foot made contact with the muddy substrate (Thulborn, 1998). With these conclusions made it was deemed a part of the ichnogenus Grallator (Hitchcock, 1858) which is most commonly associated with theropod
Chickens have undergone an interesting history as they evolved from their red jungle fowl ancestors. When the red jungle fowls reproduce, the offspring differ from the parents in minor random ways. If the differences are helpful, the offspring are more likely to survive and reproduce. This means that more offspring in the next generation will have the helpful difference. These differences accumulate resulting in changes within the population. Over time, populations branch off to become new species as they become separated. This is how chickens came to be. Mated with the gray jungle fowl and because of a minor genetic mutation, created a chicken.
Paleontologists have resorted to observing parental behavior of close living dinosaur relatives which consists of birds and crocodiles. However, fossil findings suggest that dinosaurs did in fact care for their young. Some fossilized embryos and baby dinosaur bones have been found over the years in a vast number of nests (Norell et al, 2005, p.51). Other indications of child rearing behaviors have shown up in not only dinosaur nests but in trace fossils and in evolution as well. Citipati fossil eggs in nests have been found in ominous positions, signifying that the parents protected their eggs during incubation prior to hatching.