Essay PreviewMore ↓
The article from Science News, “Telltale Dino Heart Hints at Warm Blood”, by Tina Hesman and the Journal article it was based on from Science, ”Cardiovascular Evidence for an Intermediate or Higher Metabolic Rate in an Ornithischian Dinosaur”, by Paul Fisher and others both offer a new perspective on the topic to be discussed, however there are some key differences between the two articles. How the two articles differ will be discussed later on in the paper. Both of the articles discuss the finding of a heart in a dinosaur that when studied challenges a common belief about dinosaurs hearts.
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).
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.
How to Cite this Page
"Implications of the Dinosaur Heart Discovery." 123HelpMe.com. 15 Aug 2018
Need Writing Help?
Get feedback on grammar, clarity, concision and logic instantly.Check your paper »
- Discovery of the Dinosaur with the Fossilized Heart Dinosaur fossils are one of the few ways in which scientists can study the history of life on earth millions of years ago. Each new discovery is unique in its own way and provides valuable information about the past. No two finds are exactly identical; therefore, when dinosaur remains are uncovered, the possibility and excitement of new information or even a new species exists. Until the year 2000, no dinosaur has ever been found with a fossilized heart.... [tags: Exploratory Essays Research Papers]
1324 words (3.8 pages)
- Dinosaur Physiology and Questionable Four Chambered Heart Discovery In recent years, there has been cardiovascular evidence that questions the widely held belief that dinosaurs were indeed ectothermic. There was a discovery of a skeleton encased in sandstone that closely resembled a Thescelosaurus. The set of bones had a heart shaped rock within the chest region. Tests are being done to find out if this heart is in fact the suggested four-chambered heart. If it is, then there could be important changes in the theories of dinosaur physiology.... [tags: Exploratory Essays Research Papers]
924 words (2.6 pages)
- The Implications Involving Dinosaur DNA 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.... [tags: Exploratory Essays Research Papers]
1094 words (3.1 pages)
- The Discovery of Dinosaur Fossils in Antarctica While working in Antarctica, two separate research teams with hundreds of miles between them each made astounding discoveries. They discovered dinosaur fossils. Antarctica has been home to many other dinosaur fossil finds but what was so special about these fossils is that they were from an unknown species of dinosaurs. Really what the discovery compliments is that the discovery of these fossils encourages the theory of plate tectonics and continental drift.... [tags: Anthropology Essays Paleontology Papers]
1128 words (3.2 pages)
- Theropod Discovery Challenges the Dinosaur-to-Bird Theory For years, it has been believed that Dinosaurs are ancestors of modern day birds. By simply looking at pictures of dinosaurs, one can find many physical similarities between these reptiles and modern day birds. Often the legs and the chest cavities are very similar in shape. Some dinosaurs have limbs that look like they could evolve into modern day wings, some dinosaurs even had feathers (6). A recent discovery in Italy of an extremely well preserved Scipionyx samniticus challenges this idea.... [tags: Anthropology Essays Paleontology Papers]
842 words (2.4 pages)
- Discovery of Fossilized Dinosaur Eggs in Argentina The difficulty in re-constructing dinosaurs for television and movies lies in the fact that not everything can be preserved. Fossilized bones create the skeleton of a dinosaur, thereby allowing scientists to study how they moved, how big they grew, and how different body parts worked as a whole. But what children see on television: the scaly green skin of the brontosaurs or the brown hair of a mastodon may not hold much fact. Unfortunately, particular physical features cannot be fossilized.... [tags: Anthropology Essays Paleontology Papers]
1377 words (3.9 pages)
- Implications of the Sahelanthropus Tchadensis (Toumai) Discovery Compared to the complete history of life on earth, human history is relatively brief. The earth is billions of years old and living organisms probably appeared some two to four billion years ago. Many different kinds of animals have been inhabiting the earth for hundreds of millions of years. Early hominids which are human like creatures are thought to have originated just 5 million years ago and modern humans around 100,000 years ago.... [tags: Anthropology Essays Paleontology Papers]
1001 words (2.9 pages)
- Microraptor Zhaoianus Discovery Strengthens the Dinosaur-Bird Connection Theory The evolutionary connection between dinosaurs and birds (that birds evolved from theropod dinosaurs) has long been theorized and is today generally accepted as a scientifically viable school of thought. Furthermore, several monumental discoveries have recently been made (21st century) in the area of the fossil record which have acted to solidify this evolutionary connection, drawing the evidentiary ties between dinosaurs and birds even closer together.... [tags: Anthropology Essays Paleontology Papers]
1381 words (3.9 pages)
- Dinosaur Dinosaurs: Extinct or Natural Causes As geologic time goes, all the dinosaurs living on earth suddenly disappeared. How did these dominated and gigantic creatures really die. Was it a slow extinction through natural causes, or did it happen suddenly. These questions give rise to many different beliefs on how the dinosaurs disappeared over sixty-five million years ago. Something happened sixty-five million years ago, at the end of the Cretaceous period that was so devastating that it altered the course of life on earth.... [tags: essays papers]
721 words (2.1 pages)
- A number of different theories have been assessed throughout the course of this research to attempt to reach a conclusion as to the reason behind the extinction of the Tyrannosaurus Rex. Although all arguments are credible, and supportive with educated information and data, the most conclusive theory of all is The Alvarez Asteroid Impact theory. Alvarez, a researcher at the University of California, discovered a pencil thin layer of Iridium around the rocks in Gubbio, Italy. (New Scientist, 1) Iridium is an element found in meteorites and asteroids.... [tags: essays research papers]
1368 words (3.9 pages)
Talked about in Science News article but not even mentioned in the journal article from Science was the possibility that this heart could help prove, or at least provide some evidence that dinosaurs were actually warm blooded, not the “cold blooded killers” they are often thought to be. The higher metabolic rates that a more efficient, single aorta heart, could produce is stated as being a prerequisite for being warm-blooded.
Even though this fossil heart is remarkably well preserved, the fossil has lost some components that would support this theory that the dinosaur only had one aorta. A pulmonary vessel, the vessel that carries blood to the lungs, is obviously missing. With its absence there is a possibility Willo had a second aorta. However, the aorta is much “heartier” and therefore is more likely to be able to survive in fossil form (Hesman). Where the pulmonary vessel will sometimes collapse once the animal dies, and this would lead to it disintegrating much easier (Fisher).
This find has the researchers who found and have dealt with the heart fossil to urge other fossil hunters to look for traces of internal organs before an excavation goes under way. “In the old days, this would have just been [regarded as] a hard rock in the way, and I would have destroyed it,” said hammer. This means that researchers, fossil hunters, and excavators may have been throwing away some of the best parts and best indicators to how dinosaurs worked internally. If researchers were always aware of the possibility that internal organs might be preserved and responsibly went about fossil findings that way, it is only imaginable to think of all the information and data that science would have on the anatomy of dinosaurs that is currently either an educated guess or just totally up in the air (Hesman).
In conclusion, I feel that discovery of a dinosaur, the Thescelosaurus, with a heart that possibly only has one aorta, instead of the usually mandatory two aortas for reptiles is quite remarkable and also very important. Both the article from Science News and the article from the journal Science, agree that the lack of a second aorta puts into question the metabolic rate for the dinosaur or for that matter for all different types of dinosaurs that may also only have one aorta. The only thing that I question is why the article and not the journal made the conclusion that because of the increased metabolic rate due to the heart with one aorta the dinosaur would have possibly been warm blooded. This would be, especially from what I know, an enormous discovery for the dinosaur community. If the roles were reversed, the journal had the possibility of the dinosaur being warm blooded and the article failed to mention it I would be more likely to believe it. At the end of the article the author clearly state that an evolutionary change like this could be caused by high blood pressure not metabolic rate. I also found the article in Science News much more reader friendly. The journal article was defiantly written for readers with scientific backgrounds. I found myself struggling not only on the scientific terms that have to deal with the dinosaurs, but also the medical jargon that was used to describe the heart and its functions. I found these two articles very informative and also very interesting.
Fisher, Paul. 2000. Cardiovascular Evidence for an Intermediate of Higher Metabolic
Rate in an Ornithischian Dinosaur. Science, v.288, p503-505.
Hesman, Tina. 2000. Telltale Dino Heart Hints at Warm Blood. Science News,
v. 157, p260.